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Sophie

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ghc-darcs-devel-2.8.3-1.fc18.i686.rpm

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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-cpp'>#include "gadts.h"</span>
<a name="line-4"></a>
<a name="line-5"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Repository</span><span class='hs-varop'>.</span><span class='hs-conid'>Cache</span> <span class='hs-layout'>(</span>
<a name="line-6"></a>                   <span class='hs-varid'>cacheHash</span><span class='hs-layout'>,</span> <span class='hs-varid'>okayHash</span><span class='hs-layout'>,</span> <span class='hs-varid'>takeHash</span><span class='hs-layout'>,</span>
<a name="line-7"></a>                   <span class='hs-conid'>Cache</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>CacheType</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>CacheLoc</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>WritableOrNot</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-8"></a>                   <span class='hs-conid'>HashedDir</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>hashedDir</span><span class='hs-layout'>,</span>
<a name="line-9"></a>                   <span class='hs-varid'>unionCaches</span><span class='hs-layout'>,</span> <span class='hs-varid'>unionRemoteCaches</span><span class='hs-layout'>,</span> <span class='hs-varid'>cleanCaches</span><span class='hs-layout'>,</span> <span class='hs-varid'>cleanCachesWithHint</span><span class='hs-layout'>,</span>
<a name="line-10"></a>                   <span class='hs-varid'>fetchFileUsingCache</span><span class='hs-layout'>,</span> <span class='hs-varid'>speculateFileUsingCache</span><span class='hs-layout'>,</span> <span class='hs-varid'>speculateFilesUsingCache</span><span class='hs-layout'>,</span>
<a name="line-11"></a>                   <span class='hs-varid'>writeFileUsingCache</span><span class='hs-layout'>,</span>
<a name="line-12"></a>                   <span class='hs-varid'>peekInCache</span><span class='hs-layout'>,</span>
<a name="line-13"></a>                   <span class='hs-varid'>repo2cache</span><span class='hs-layout'>,</span>
<a name="line-14"></a>                   <span class='hs-varid'>writable</span><span class='hs-layout'>,</span> <span class='hs-varid'>isthisrepo</span><span class='hs-layout'>,</span> <span class='hs-varid'>hashedFilePath</span><span class='hs-layout'>,</span> <span class='hs-varid'>allHashedDirs</span><span class='hs-layout'>,</span> <span class='hs-varid'>compareByLocality</span><span class='hs-layout'>,</span>
<a name="line-15"></a>                   <span class='hs-varid'>reportBadSources</span>
<a name="line-16"></a>                 <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span> <span class='hs-varid'>liftM</span><span class='hs-layout'>,</span> <span class='hs-varid'>when</span><span class='hs-layout'>,</span> <span class='hs-varid'>guard</span><span class='hs-layout'>,</span> <span class='hs-varid'>unless</span><span class='hs-layout'>,</span> <span class='hs-varid'>filterM</span><span class='hs-layout'>,</span> <span class='hs-varid'>forM_</span><span class='hs-layout'>,</span> <span class='hs-varid'>mplus</span> <span class='hs-layout'>)</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span> <span class='hs-varid'>nub</span><span class='hs-layout'>,</span> <span class='hs-varid'>intercalate</span> <span class='hs-layout'>)</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span> <span class='hs-varid'>catMaybes</span><span class='hs-layout'>,</span> <span class='hs-varid'>listToMaybe</span><span class='hs-layout'>,</span> <span class='hs-varid'>isJust</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-layout'>)</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span> <span class='hs-layout'>(</span> <span class='hs-varid'>removeFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>doesFileExist</span><span class='hs-layout'>,</span> <span class='hs-varid'>doesDirectoryExist</span><span class='hs-layout'>,</span>
<a name="line-22"></a>                          <span class='hs-varid'>getDirectoryContents</span><span class='hs-layout'>,</span> <span class='hs-varid'>getPermissions</span> <span class='hs-layout'>)</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>SD</span> <span class='hs-layout'>(</span> <span class='hs-varid'>writable</span> <span class='hs-layout'>)</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Files</span> <span class='hs-layout'>(</span> <span class='hs-varid'>linkCount</span><span class='hs-layout'>,</span> <span class='hs-varid'>getSymbolicLinkStatus</span> <span class='hs-layout'>)</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span> <span class='hs-layout'>(</span> <span class='hs-varid'>hPutStrLn</span><span class='hs-layout'>,</span> <span class='hs-varid'>stderr</span> <span class='hs-layout'>)</span>
<a name="line-26"></a>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Crypt</span><span class='hs-varop'>.</span><span class='hs-conid'>SHA256</span> <span class='hs-layout'>(</span> <span class='hs-varid'>sha256sum</span> <span class='hs-layout'>)</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>ByteStringUtils</span> <span class='hs-layout'>(</span> <span class='hs-varid'>gzWriteFilePS</span><span class='hs-layout'>,</span> <span class='hs-varid'>linesPS</span> <span class='hs-layout'>)</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>B</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span><span class='hs-layout'>,</span> <span class='hs-varid'>drop</span><span class='hs-layout'>,</span> <span class='hs-conid'>ByteString</span> <span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>BC</span> <span class='hs-layout'>(</span><span class='hs-varid'>unpack</span><span class='hs-layout'>)</span>
<a name="line-32"></a>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>SHA1</span> <span class='hs-layout'>(</span> <span class='hs-varid'>sha1PS</span> <span class='hs-layout'>)</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Files</span> <span class='hs-layout'>(</span> <span class='hs-varid'>createLink</span> <span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>FilePath</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span> <span class='hs-layout'>(</span> <span class='hs-layout'>(</span><span class='hs-varop'>&lt;/&gt;</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span> <span class='hs-layout'>(</span> <span class='hs-varid'>createDirectoryIfMissing</span> <span class='hs-layout'>)</span>
<a name="line-37"></a>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>External</span> <span class='hs-layout'>(</span> <span class='hs-varid'>gzFetchFilePS</span><span class='hs-layout'>,</span> <span class='hs-varid'>fetchFilePS</span><span class='hs-layout'>,</span> <span class='hs-varid'>speculateFileOrUrl</span><span class='hs-layout'>,</span> <span class='hs-varid'>copyFileOrUrl</span><span class='hs-layout'>,</span>
<a name="line-39"></a>                        <span class='hs-conid'>Cachable</span><span class='hs-layout'>(</span> <span class='hs-conid'>Cachable</span> <span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Flags</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Compression</span><span class='hs-layout'>(</span> <span class='hs-keyglyph'>..</span> <span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>RemoteDarcs</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Global</span> <span class='hs-layout'>(</span> <span class='hs-varid'>darcsdir</span><span class='hs-layout'>,</span> <span class='hs-varid'>addBadSource</span><span class='hs-layout'>,</span> <span class='hs-varid'>isBadSource</span><span class='hs-layout'>,</span>
<a name="line-42"></a>                      <span class='hs-varid'>addReachableSource</span><span class='hs-layout'>,</span> <span class='hs-varid'>isReachableSource</span><span class='hs-layout'>,</span>
<a name="line-43"></a>                      <span class='hs-varid'>getBadSourcesList</span> <span class='hs-layout'>)</span>
<a name="line-44"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Lock</span> <span class='hs-layout'>(</span> <span class='hs-varid'>writeAtomicFilePS</span><span class='hs-layout'>,</span> <span class='hs-varid'>gzWriteAtomicFilePS</span><span class='hs-layout'>,</span> <span class='hs-varid'>withTemp</span> <span class='hs-layout'>)</span>
<a name="line-45"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Progress</span> <span class='hs-layout'>(</span> <span class='hs-varid'>progressList</span><span class='hs-layout'>,</span> <span class='hs-varid'>debugMessage</span><span class='hs-layout'>,</span> <span class='hs-varid'>debugFail</span> <span class='hs-layout'>)</span>
<a name="line-46"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>English</span> <span class='hs-layout'>(</span> <span class='hs-varid'>englishNum</span><span class='hs-layout'>,</span> <span class='hs-conid'>Noun</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Pronoun</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-47"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>URL</span> <span class='hs-layout'>(</span> <span class='hs-varid'>isFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>isHttpUrl</span><span class='hs-layout'>,</span> <span class='hs-varid'>isSshUrl</span> <span class='hs-layout'>)</span>
<a name="line-48"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span> <span class='hs-layout'>(</span> <span class='hs-varid'>withCurrentDirectory</span><span class='hs-layout'>,</span> <span class='hs-varid'>catchall</span> <span class='hs-layout'>)</span>
<a name="line-49"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>SignalHandler</span> <span class='hs-layout'>(</span> <span class='hs-varid'>catchNonSignal</span> <span class='hs-layout'>)</span>
<a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>URL</span> <span class='hs-layout'>(</span> <span class='hs-conid'>ConnectionError</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-51"></a>
<a name="line-52"></a><a name="HashedDir"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>HashedPristineDir</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HashedPatchesDir</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HashedInventoriesDir</span>
<a name="line-53"></a><a name="hashedDir"></a><span class='hs-definition'>hashedDir</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span>
<a name="line-54"></a><span class='hs-definition'>hashedDir</span> <span class='hs-conid'>HashedPristineDir</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"pristine.hashed"</span>
<a name="line-55"></a><span class='hs-definition'>hashedDir</span> <span class='hs-conid'>HashedPatchesDir</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"patches"</span>
<a name="line-56"></a><span class='hs-definition'>hashedDir</span> <span class='hs-conid'>HashedInventoriesDir</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"inventories"</span>
<a name="line-57"></a>
<a name="line-58"></a><a name="allHashedDirs"></a><span class='hs-definition'>allHashedDirs</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>HashedDir</span><span class='hs-keyglyph'>]</span>
<a name="line-59"></a><span class='hs-definition'>allHashedDirs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>HashedPristineDir</span><span class='hs-layout'>,</span> <span class='hs-conid'>HashedPatchesDir</span><span class='hs-layout'>,</span> <span class='hs-conid'>HashedInventoriesDir</span><span class='hs-keyglyph'>]</span>
<a name="line-60"></a>
<a name="line-61"></a><a name="WritableOrNot"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>WritableOrNot</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Writable</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NotWritable</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>)</span>
<a name="line-62"></a><a name="CacheType"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>CacheType</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Repo</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Directory</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>)</span>
<a name="line-63"></a><a name="CacheLoc"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Cache</span> <span class='hs-layout'>{</span> <span class='hs-varid'>cacheType</span><span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-conid'>CacheType</span><span class='hs-layout'>,</span> <span class='hs-varid'>cacheWritable</span><span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-conid'>WritableOrNot</span><span class='hs-layout'>,</span> <span class='hs-varid'>cacheSource</span><span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-conid'>String</span> <span class='hs-layout'>}</span>
<a name="line-64"></a><a name="Cache"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Ca</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>CacheLoc</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- abstract type for hiding cache</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="instance%20Eq%20CacheLoc"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyword'>where</span>
<a name="line-67"></a>    <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Repo</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Repo</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>==</span> <span class='hs-varid'>b</span>
<a name="line-68"></a>    <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Directory</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Directory</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>==</span> <span class='hs-varid'>b</span>
<a name="line-69"></a>    <span class='hs-keyword'>_</span> <span class='hs-varop'>==</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-70"></a><a name="instance%20Show%20CacheLoc"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyword'>where</span>
<a name="line-71"></a>    <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Repo</span> <span class='hs-conid'>Writable</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"thisrepo:"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>a</span>
<a name="line-72"></a>    <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Repo</span> <span class='hs-conid'>NotWritable</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"repo:"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>a</span>
<a name="line-73"></a>    <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Directory</span> <span class='hs-conid'>Writable</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"cache:"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>a</span>
<a name="line-74"></a>    <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Directory</span> <span class='hs-conid'>NotWritable</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"readonly:"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>a</span>
<a name="line-75"></a><a name="instance%20Show%20Cache"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>Cache</span> <span class='hs-keyword'>where</span>
<a name="line-76"></a>    <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unlines</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>show</span> <span class='hs-varid'>cs</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="unionCaches"></a><span class='hs-definition'>unionCaches</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Cache</span>
<a name="line-79"></a><span class='hs-definition'>unionCaches</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Ca</span> <span class='hs-layout'>(</span><span class='hs-varid'>nub</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-varop'>++</span><span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="unionRemoteCaches"></a><span class='hs-comment'>-- | unionRemoteCaches merges caches. It tries to do better than just blindly</span>
<a name="line-82"></a><span class='hs-comment'>--   copying remote cache entries:</span>
<a name="line-83"></a><span class='hs-comment'>--</span>
<a name="line-84"></a><span class='hs-comment'>--   * If remote repository is accessed through network, do not copy any cache</span>
<a name="line-85"></a><span class='hs-comment'>--     entries from it. Taking local entries does not make sense and using</span>
<a name="line-86"></a><span class='hs-comment'>--     network entries can lead to darcs hang when it tries to get to</span>
<a name="line-87"></a><span class='hs-comment'>--     unaccessible host.</span>
<a name="line-88"></a><span class='hs-comment'>--</span>
<a name="line-89"></a><span class='hs-comment'>--   * If remote repositoty is local, copy all network cache entries. For local</span>
<a name="line-90"></a><span class='hs-comment'>--     cache entries if the cache directory exists and is writable it is added</span>
<a name="line-91"></a><span class='hs-comment'>--     as writable cache, if it exists but is not writable it is added as</span>
<a name="line-92"></a><span class='hs-comment'>--     read-only cache.</span>
<a name="line-93"></a><span class='hs-comment'>--</span>
<a name="line-94"></a><span class='hs-comment'>--   This approach should save us from bogus cache entries. One case it does not</span>
<a name="line-95"></a><span class='hs-comment'>--   work very well is when you fetch from partial repository over network.</span>
<a name="line-96"></a><span class='hs-comment'>--   Hopefully this is not a common case.</span>
<a name="line-97"></a><span class='hs-definition'>unionRemoteCaches</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span><span class='hs-layout'>)</span>
<a name="line-98"></a><span class='hs-definition'>unionRemoteCaches</span> <span class='hs-varid'>local</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>remote</span><span class='hs-layout'>)</span> <span class='hs-varid'>repourl</span>
<a name="line-99"></a>    <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isFile</span> <span class='hs-varid'>repourl</span> <span class='hs-keyglyph'>=</span>  <span class='hs-keyword'>do</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>filtered</span>
<a name="line-100"></a>                           <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>local</span> <span class='hs-varop'>`unionCaches`</span> <span class='hs-conid'>Ca</span> <span class='hs-varid'>f</span>
<a name="line-101"></a>    <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>local</span>
<a name="line-102"></a>  <span class='hs-keyword'>where</span> <span class='hs-varid'>filtered</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>fn</span> <span class='hs-varid'>x</span> <span class='hs-varop'>`catchall`</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-varid'>remote</span> <span class='hs-varop'>&gt;&gt;=</span>
<a name="line-103"></a>                   <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>catMaybes</span>
<a name="line-104"></a>        <span class='hs-varid'>fn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>CacheLoc</span><span class='hs-layout'>)</span>
<a name="line-105"></a>        <span class='hs-varid'>fn</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Repo</span> <span class='hs-conid'>Writable</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-106"></a>        <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>url</span><span class='hs-layout'>)</span>
<a name="line-107"></a>          <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isFile</span> <span class='hs-varid'>url</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-108"></a>              <span class='hs-varid'>ex</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>doesDirectoryExist</span> <span class='hs-varid'>url</span>
<a name="line-109"></a>              <span class='hs-keyword'>if</span> <span class='hs-varid'>ex</span> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>getPermissions</span> <span class='hs-varid'>url</span>
<a name="line-110"></a>                            <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span>
<a name="line-111"></a>                              <span class='hs-keyword'>if</span> <span class='hs-varid'>writable</span> <span class='hs-varid'>c</span> <span class='hs-varop'>&amp;&amp;</span> <span class='hs-conid'>SD</span><span class='hs-varop'>.</span><span class='hs-varid'>writable</span> <span class='hs-varid'>p</span>
<a name="line-112"></a>                              <span class='hs-keyword'>then</span> <span class='hs-varid'>c</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Cache</span> <span class='hs-varid'>t</span> <span class='hs-conid'>NotWritable</span> <span class='hs-varid'>url</span>
<a name="line-113"></a>                    <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-114"></a>          <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>c</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="compareByLocality"></a><span class='hs-comment'>-- | Compares two caches, a remote cache is greater than a local one.</span>
<a name="line-117"></a><span class='hs-comment'>-- The order of the comparison is given by: local &lt; http &lt; ssh</span>
<a name="line-118"></a><span class='hs-definition'>compareByLocality</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ordering</span>
<a name="line-119"></a><span class='hs-definition'>compareByLocality</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span>  <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-120"></a>  <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isLocal</span> <span class='hs-varid'>x</span> <span class='hs-varop'>&amp;&amp;</span>  <span class='hs-varid'>isRemote</span> <span class='hs-varid'>y</span>  <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LT</span>
<a name="line-121"></a>  <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isRemote</span> <span class='hs-varid'>x</span> <span class='hs-varop'>&amp;&amp;</span> <span class='hs-varid'>isLocal</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>GT</span>
<a name="line-122"></a>  <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isHttpUrl</span> <span class='hs-varid'>x</span> <span class='hs-varop'>&amp;&amp;</span> <span class='hs-varid'>isSshUrl</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LT</span>
<a name="line-123"></a>  <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isSshUrl</span> <span class='hs-varid'>x</span> <span class='hs-varop'>&amp;&amp;</span> <span class='hs-varid'>isHttpUrl</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>GT</span>
<a name="line-124"></a>  <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EQ</span>
<a name="line-125"></a>    <span class='hs-keyword'>where</span>
<a name="line-126"></a>      <span class='hs-varid'>isRemote</span> <span class='hs-varid'>r</span><span class='hs-keyglyph'>=</span> <span class='hs-varid'>isHttpUrl</span> <span class='hs-varid'>r</span> <span class='hs-varop'>||</span> <span class='hs-varid'>isSshUrl</span> <span class='hs-varid'>r</span>
<a name="line-127"></a>      <span class='hs-varid'>isLocal</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isFile</span>
<a name="line-128"></a>
<a name="line-129"></a><a name="repo2cache"></a><span class='hs-definition'>repo2cache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Cache</span>
<a name="line-130"></a><span class='hs-definition'>repo2cache</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Ca</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Repo</span> <span class='hs-conid'>NotWritable</span> <span class='hs-varid'>r</span><span class='hs-keyglyph'>]</span>
<a name="line-131"></a>
<a name="line-132"></a><a name="cacheHash"></a><span class='hs-comment'>-- | 'cacheHash' computes the cache hash (i.e. filename) of a packed string.</span>
<a name="line-133"></a><span class='hs-definition'>cacheHash</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span>
<a name="line-134"></a><span class='hs-definition'>cacheHash</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-135"></a>                 <span class='hs-varid'>x</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>l</span> <span class='hs-varop'>&gt;</span> <span class='hs-num'>10</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>sha256sum</span> <span class='hs-varid'>ps</span>
<a name="line-136"></a>                   <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>replicate</span> <span class='hs-layout'>(</span><span class='hs-num'>10</span><span class='hs-comment'>-</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-chr'>'0'</span> <span class='hs-varop'>++</span> <span class='hs-varid'>x</span> <span class='hs-varop'>++</span><span class='hs-chr'>'-'</span><span class='hs-conop'>:</span><span class='hs-varid'>sha256sum</span> <span class='hs-varid'>ps</span>
<a name="line-137"></a>                                        <span class='hs-keyword'>where</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>x</span>
<a name="line-138"></a>
<a name="line-139"></a><a name="okayHash"></a><span class='hs-definition'>okayHash</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Bool</span>
<a name="line-140"></a><span class='hs-definition'>okayHash</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-num'>40</span> <span class='hs-varop'>||</span> <span class='hs-varid'>length</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-num'>64</span> <span class='hs-varop'>||</span> <span class='hs-varid'>length</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-num'>75</span>
<a name="line-141"></a>
<a name="line-142"></a><a name="takeHash"></a><span class='hs-definition'>takeHash</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-143"></a><span class='hs-definition'>takeHash</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>listToMaybe</span> <span class='hs-varop'>$</span> <span class='hs-varid'>linesPS</span> <span class='hs-varid'>ps</span>
<a name="line-144"></a>                 <span class='hs-keyword'>let</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>h</span>
<a name="line-145"></a>                 <span class='hs-varid'>guard</span> <span class='hs-varop'>$</span> <span class='hs-varid'>okayHash</span> <span class='hs-varid'>v</span>
<a name="line-146"></a>                 <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span>
<a name="line-147"></a>
<a name="line-148"></a><a name="checkHash"></a><span class='hs-definition'>checkHash</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Bool</span>
<a name="line-149"></a><span class='hs-definition'>checkHash</span> <span class='hs-varid'>h</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>length</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-num'>40</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sha1PS</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>h</span>
<a name="line-150"></a>              <span class='hs-keyglyph'>|</span> <span class='hs-varid'>length</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-num'>64</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sha256sum</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>h</span>
<a name="line-151"></a>              <span class='hs-keyglyph'>|</span> <span class='hs-varid'>length</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-num'>75</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>read</span> <span class='hs-layout'>(</span><span class='hs-varid'>take</span> <span class='hs-num'>10</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varop'>&amp;&amp;</span> <span class='hs-varid'>sha256sum</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>drop</span> <span class='hs-num'>11</span> <span class='hs-varid'>h</span>
<a name="line-152"></a>              <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-153"></a>
<a name="line-154"></a><a name="fetchFileUsingCache"></a><span class='hs-comment'>-- |@fetchFileUsingCache cache dir hash@ receives a list of caches</span>
<a name="line-155"></a><span class='hs-comment'>--  @cache@, the directory for which that file belongs @dir@ and the</span>
<a name="line-156"></a><span class='hs-comment'>--  @hash@ of the file to fetch.  It tries to fetch the file from one</span>
<a name="line-157"></a><span class='hs-comment'>--  of the sources, trying them in order one by one.  If the file</span>
<a name="line-158"></a><span class='hs-comment'>--  cannot be fetched from any of the sources, this operation fails.</span>
<a name="line-159"></a><span class='hs-definition'>fetchFileUsingCache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-160"></a><span class='hs-definition'>fetchFileUsingCache</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fetchFileUsingCachePrivate</span> <span class='hs-conid'>Anywhere</span>
<a name="line-161"></a>
<a name="line-162"></a><a name="writable"></a><span class='hs-definition'>writable</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Bool</span>
<a name="line-163"></a><span class='hs-definition'>writable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NotWritable</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-164"></a><span class='hs-definition'>writable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Writable</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-165"></a>
<a name="line-166"></a><a name="isthisrepo"></a><span class='hs-definition'>isthisrepo</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Bool</span>
<a name="line-167"></a><span class='hs-definition'>isthisrepo</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Repo</span> <span class='hs-conid'>Writable</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-168"></a><span class='hs-definition'>isthisrepo</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-169"></a>
<a name="line-170"></a><a name="hashedFilePath"></a><span class='hs-comment'>-- | @hashedFilePath cachelocation subdir hash@ returns the physical filename of</span>
<a name="line-171"></a><span class='hs-comment'>-- hash @hash@ in the @subdir@ section of @cachelocation@.</span>
<a name="line-172"></a><span class='hs-definition'>hashedFilePath</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span>
<a name="line-173"></a><span class='hs-definition'>hashedFilePath</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Directory</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span> <span class='hs-varop'>++</span> <span class='hs-str'>"/"</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>hashedDir</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>"/"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>f</span>
<a name="line-174"></a><span class='hs-definition'>hashedFilePath</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Repo</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span>
<a name="line-175"></a>    <span class='hs-varid'>r</span> <span class='hs-varop'>++</span> <span class='hs-str'>"/"</span><span class='hs-varop'>++</span><span class='hs-varid'>darcsdir</span><span class='hs-varop'>++</span><span class='hs-str'>"/"</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>hashedDir</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>"/"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>f</span>
<a name="line-176"></a>
<a name="line-177"></a><a name="peekInCache"></a><span class='hs-comment'>-- | @peekInCache cache subdir hash@ tells whether @cache@ and</span>
<a name="line-178"></a><span class='hs-comment'>-- contains an object with hash @hash@ in a writable position.</span>
<a name="line-179"></a><span class='hs-comment'>-- Florent: why do we want it to be in a writable position?</span>
<a name="line-180"></a><span class='hs-definition'>peekInCache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-181"></a><span class='hs-definition'>peekInCache</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cache</span><span class='hs-layout'>)</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cacheHasIt</span> <span class='hs-varid'>cache</span> <span class='hs-varop'>`catchall`</span> <span class='hs-varid'>return</span> <span class='hs-conid'>False</span>
<a name="line-182"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>cacheHasIt</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>False</span>
<a name="line-183"></a>          <span class='hs-varid'>cacheHasIt</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>writable</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cacheHasIt</span> <span class='hs-varid'>cs</span>
<a name="line-184"></a>                            <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>ex</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>doesFileExist</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span>
<a name="line-185"></a>                                             <span class='hs-keyword'>if</span> <span class='hs-varid'>ex</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-conid'>True</span>
<a name="line-186"></a>                                                   <span class='hs-keyword'>else</span> <span class='hs-varid'>cacheHasIt</span> <span class='hs-varid'>cs</span>
<a name="line-187"></a>          <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hashedFilePath</span> <span class='hs-varid'>c</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>f</span>
<a name="line-188"></a>
<a name="line-189"></a><a name="speculateFileUsingCache"></a><span class='hs-comment'>-- | @speculateFileUsingCache cache subdirectory name@ takes note that</span>
<a name="line-190"></a><span class='hs-comment'>-- the file @name@ is likely to be useful soon: pipelined downloads</span>
<a name="line-191"></a><span class='hs-comment'>-- will add it to the (low-priority) queue, for the rest it is a noop.</span>
<a name="line-192"></a><span class='hs-definition'>speculateFileUsingCache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-193"></a><span class='hs-definition'>speculateFileUsingCache</span> <span class='hs-varid'>c</span> <span class='hs-varid'>sd</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>debugMessage</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Speculating on "</span><span class='hs-varop'>++</span><span class='hs-varid'>h</span>
<a name="line-194"></a>                                    <span class='hs-varid'>copyFileUsingCache</span> <span class='hs-conid'>OnlySpeculate</span> <span class='hs-varid'>c</span> <span class='hs-varid'>sd</span> <span class='hs-varid'>h</span>
<a name="line-195"></a>
<a name="line-196"></a><a name="speculateFilesUsingCache"></a><span class='hs-comment'>-- | Note that the files are likely to be useful soon: pipelined downloads will</span>
<a name="line-197"></a><span class='hs-comment'>-- add them to the (low-priority) queue, for the rest it is a noop.</span>
<a name="line-198"></a><span class='hs-definition'>speculateFilesUsingCache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-199"></a><span class='hs-definition'>speculateFilesUsingCache</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-200"></a><span class='hs-definition'>speculateFilesUsingCache</span> <span class='hs-varid'>cache</span> <span class='hs-varid'>sd</span> <span class='hs-varid'>hs</span> <span class='hs-keyglyph'>=</span>
<a name="line-201"></a>    <span class='hs-keyword'>do</span> <span class='hs-comment'>--debugMessage $ "Thinking about speculating on "++unwords hs</span>
<a name="line-202"></a>       <span class='hs-varid'>hs'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>filterM</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>peekInCache</span> <span class='hs-varid'>cache</span> <span class='hs-varid'>sd</span><span class='hs-layout'>)</span> <span class='hs-varid'>hs</span>
<a name="line-203"></a>       <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>null</span> <span class='hs-varid'>hs'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>debugMessage</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Speculating on "</span><span class='hs-varop'>++</span><span class='hs-varid'>unwords</span> <span class='hs-varid'>hs'</span>
<a name="line-204"></a>                              <span class='hs-varid'>copyFilesUsingCache</span> <span class='hs-conid'>OnlySpeculate</span> <span class='hs-varid'>cache</span> <span class='hs-varid'>sd</span> <span class='hs-varid'>hs'</span>
<a name="line-205"></a>
<a name="line-206"></a><a name="OrOnlySpeculate"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>OrOnlySpeculate</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ActuallyCopy</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OnlySpeculate</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>)</span>
<a name="line-207"></a>
<a name="line-208"></a><a name="copyFileUsingCache"></a><span class='hs-comment'>-- | @copyFileUsingCache oos cache subdir f@ copy or hardlinks the</span>
<a name="line-209"></a><span class='hs-comment'>--   file @f@ to one of the caches in @cache@,usually the global cache.</span>
<a name="line-210"></a><span class='hs-comment'>--   If a writable cache doesn't exist the function will fail.</span>
<a name="line-211"></a><span class='hs-definition'>copyFileUsingCache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>OrOnlySpeculate</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-212"></a><span class='hs-definition'>copyFileUsingCache</span> <span class='hs-varid'>oos</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cache</span><span class='hs-layout'>)</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span>
<a name="line-213"></a>    <span class='hs-keyword'>do</span> <span class='hs-varid'>debugMessage</span> <span class='hs-varop'>$</span> <span class='hs-str'>"I'm doing copyFileUsingCache on "</span><span class='hs-varop'>++</span><span class='hs-layout'>(</span><span class='hs-varid'>hashedDir</span> <span class='hs-varid'>subdir</span><span class='hs-layout'>)</span><span class='hs-varop'>++</span><span class='hs-str'>"/"</span><span class='hs-varop'>++</span><span class='hs-varid'>f</span>
<a name="line-214"></a>       <span class='hs-conid'>Just</span> <span class='hs-varid'>stickItHere</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>cacheLoc</span> <span class='hs-varid'>cache</span>
<a name="line-215"></a>       <span class='hs-varid'>createDirectoryIfMissing</span> <span class='hs-conid'>False</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varop'>$</span> <span class='hs-varid'>dropWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span><span class='hs-chr'>'/'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>stickItHere</span><span class='hs-layout'>)</span>
<a name="line-216"></a>       <span class='hs-varid'>filterBadSources</span> <span class='hs-varid'>cache</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-varid'>sfuc</span><span class='hs-layout'>)</span> <span class='hs-varid'>stickItHere</span>
<a name="line-217"></a>    <span class='hs-varop'>`catchall`</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-218"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>cacheLoc</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-219"></a>          <span class='hs-varid'>cacheLoc</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>writable</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cacheLoc</span> <span class='hs-varid'>cs</span>
<a name="line-220"></a>                          <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span>
<a name="line-221"></a>              <span class='hs-keyword'>do</span> <span class='hs-varid'>ex</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>doesFileExist</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span>
<a name="line-222"></a>                 <span class='hs-keyword'>if</span> <span class='hs-varid'>ex</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"Bug in darcs: This exception should be caught in speculateFileUsingCache"</span>
<a name="line-223"></a>                       <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>othercache</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>cacheLoc</span> <span class='hs-varid'>cs</span>
<a name="line-224"></a>                               <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>othercache</span> <span class='hs-varop'>`mplus`</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-225"></a>          <span class='hs-varid'>sfuc</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-226"></a>          <span class='hs-varid'>sfuc</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-varid'>out</span>
<a name="line-227"></a>            <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>writable</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-228"></a>              <span class='hs-keyword'>if</span> <span class='hs-varid'>oos</span> <span class='hs-varop'>==</span> <span class='hs-conid'>OnlySpeculate</span>
<a name="line-229"></a>               <span class='hs-keyword'>then</span> <span class='hs-varid'>speculateFileOrUrl</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>out</span> <span class='hs-varop'>`catchNonSignal`</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>e</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>checkCacheReachability</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-230"></a>               <span class='hs-keyword'>else</span> <span class='hs-varid'>copyFileOrUrl</span> <span class='hs-conid'>DefaultRemoteDarcs</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>out</span> <span class='hs-conid'>Cachable</span> <span class='hs-varop'>`catchNonSignal`</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>e</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>checkCacheReachability</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-231"></a>            <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sfuc</span> <span class='hs-varid'>cs</span> <span class='hs-varid'>out</span>
<a name="line-232"></a>          <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hashedFilePath</span> <span class='hs-varid'>c</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>f</span>
<a name="line-233"></a>
<a name="line-234"></a><a name="copyFilesUsingCache"></a><span class='hs-definition'>copyFilesUsingCache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>OrOnlySpeculate</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-235"></a><span class='hs-definition'>copyFilesUsingCache</span> <span class='hs-varid'>oos</span> <span class='hs-varid'>cache</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>hs</span> <span class='hs-keyglyph'>=</span>
<a name="line-236"></a>    <span class='hs-varid'>forM_</span> <span class='hs-varid'>hs</span> <span class='hs-varop'>$</span> <span class='hs-varid'>copyFileUsingCache</span> <span class='hs-varid'>oos</span> <span class='hs-varid'>cache</span> <span class='hs-varid'>subdir</span>
<a name="line-237"></a>
<a name="line-238"></a>
<a name="line-239"></a><a name="FromWhere"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FromWhere</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LocalOnly</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Anywhere</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>)</span>
<a name="line-240"></a>
<a name="line-241"></a><a name="checkCacheReachability"></a><span class='hs-comment'>-- | Checks if a given cache entry is reachable or not.</span>
<a name="line-242"></a><span class='hs-comment'>-- It receives an error caught during execution and the cache entry.</span>
<a name="line-243"></a><span class='hs-comment'>-- If the caches is not reachable it is blacklisted and not longer tried for</span>
<a name="line-244"></a><span class='hs-comment'>-- the rest of the session. If it is reachable it is whitelisted and future errors with such</span>
<a name="line-245"></a><span class='hs-comment'>-- cache get ignore.</span>
<a name="line-246"></a><span class='hs-comment'>-- To determine reachability:</span>
<a name="line-247"></a><span class='hs-comment'>--  * For a local cache, if the given source doesn't exist anymore, it is blacklisted.</span>
<a name="line-248"></a><span class='hs-comment'>--  * For remote sources if the error is timeout, it is blacklisted, if not,</span>
<a name="line-249"></a><span class='hs-comment'>--    it checks if _darcs/hashed_inventory  exist, if it does, the entry is whitelisted, if</span>
<a name="line-250"></a><span class='hs-comment'>--    it doesn't, it is blacklisted.</span>
<a name="line-251"></a><span class='hs-definition'>checkCacheReachability</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-252"></a><span class='hs-definition'>checkCacheReachability</span> <span class='hs-varid'>e</span> <span class='hs-varid'>cache</span>
<a name="line-253"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isFile</span> <span class='hs-varid'>source</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-254"></a>     <span class='hs-varid'>reachable</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>isReachableSource</span>
<a name="line-255"></a>     <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>reachable</span> <span class='hs-varid'>source</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-256"></a>       <span class='hs-varid'>exist</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>doesDirectoryExist</span> <span class='hs-varid'>source</span>
<a name="line-257"></a>       <span class='hs-keyword'>if</span> <span class='hs-varid'>exist</span>
<a name="line-258"></a>        <span class='hs-keyword'>then</span>
<a name="line-259"></a>         <span class='hs-varid'>addReachableSource</span> <span class='hs-varid'>source</span>
<a name="line-260"></a>        <span class='hs-keyword'>else</span>
<a name="line-261"></a>         <span class='hs-varid'>addBadSource</span> <span class='hs-varid'>source</span>
<a name="line-262"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isHttpUrl</span> <span class='hs-varid'>source</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-263"></a>     <span class='hs-varid'>reachable</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>isReachableSource</span>
<a name="line-264"></a>     <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>reachable</span> <span class='hs-varid'>source</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-265"></a>            <span class='hs-keyword'>let</span> <span class='hs-varid'>string</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>dropWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span><span class='hs-chr'>'('</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-266"></a>                          <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>fst</span> <span class='hs-layout'>(</span><span class='hs-varid'>break</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-chr'>')'</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-267"></a>                          <span class='hs-keyword'>_</span>      <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>e</span>
<a name="line-268"></a>            <span class='hs-keyword'>let</span> <span class='hs-varid'>cerror</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>reads</span> <span class='hs-varid'>string</span> <span class='hs-keyglyph'>::</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>URL</span><span class='hs-varop'>.</span><span class='hs-conid'>ConnectionError</span><span class='hs-layout'>,</span><span class='hs-conid'>String</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyword'>of</span>
<a name="line-269"></a>                           <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>ce</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>ce</span>
<a name="line-270"></a>                           <span class='hs-keyword'>_</span>        <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Nothing</span>
<a name="line-271"></a>            <span class='hs-keyword'>if</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>cerror</span>
<a name="line-272"></a>             <span class='hs-keyword'>then</span> <span class='hs-varid'>addBadSource</span> <span class='hs-varid'>source</span>
<a name="line-273"></a>             <span class='hs-keyword'>else</span> <span class='hs-varid'>checkFileReachability</span>
<a name="line-274"></a>
<a name="line-275"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isSshUrl</span> <span class='hs-varid'>source</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-276"></a>   <span class='hs-varid'>reachable</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>isReachableSource</span>
<a name="line-277"></a>   <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>reachable</span> <span class='hs-varid'>source</span><span class='hs-layout'>)</span> <span class='hs-varid'>checkFileReachability</span>
<a name="line-278"></a>
<a name="line-279"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"unknown transport protocol for: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>source</span>
<a name="line-280"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>source</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cacheSource</span> <span class='hs-varid'>cache</span>
<a name="line-281"></a>       <span class='hs-varid'>checkFileReachability</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-282"></a>         <span class='hs-varid'>reachable</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>checkHashedInventoryReachability</span> <span class='hs-varid'>cache</span>
<a name="line-283"></a>         <span class='hs-keyword'>if</span> <span class='hs-varid'>reachable</span>
<a name="line-284"></a>          <span class='hs-keyword'>then</span>
<a name="line-285"></a>           <span class='hs-varid'>addReachableSource</span> <span class='hs-varid'>source</span>
<a name="line-286"></a>          <span class='hs-keyword'>else</span>
<a name="line-287"></a>           <span class='hs-varid'>addBadSource</span> <span class='hs-varid'>source</span>
<a name="line-288"></a>
<a name="line-289"></a><a name="filterBadSources"></a><span class='hs-comment'>-- | Returns a list of reachables cache entries,</span>
<a name="line-290"></a><span class='hs-comment'>--   taking out the blacklisted entries</span>
<a name="line-291"></a><span class='hs-definition'>filterBadSources</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>CacheLoc</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>CacheLoc</span><span class='hs-keyglyph'>]</span>
<a name="line-292"></a><span class='hs-definition'>filterBadSources</span> <span class='hs-varid'>cache</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-293"></a>   <span class='hs-varid'>badSource</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>isBadSource</span>
<a name="line-294"></a>   <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>badSource</span> <span class='hs-varop'>.</span> <span class='hs-varid'>cacheSource</span><span class='hs-layout'>)</span> <span class='hs-varid'>cache</span>
<a name="line-295"></a>
<a name="line-296"></a><a name="checkHashedInventoryReachability"></a><span class='hs-comment'>-- | Checks if the  _darcs/hashed_inventory exist and is reachable</span>
<a name="line-297"></a><span class='hs-definition'>checkHashedInventoryReachability</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-298"></a><span class='hs-definition'>checkHashedInventoryReachability</span> <span class='hs-varid'>cache</span> <span class='hs-keyglyph'>=</span>
<a name="line-299"></a>     <span class='hs-varid'>withTemp</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>tempout</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>do</span>
<a name="line-300"></a>       <span class='hs-keyword'>let</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cacheSource</span> <span class='hs-varid'>cache</span> <span class='hs-varop'>&lt;/&gt;</span> <span class='hs-varid'>darcsdir</span> <span class='hs-varop'>&lt;/&gt;</span> <span class='hs-str'>"hashed_inventory"</span>
<a name="line-301"></a>       <span class='hs-varid'>copyFileOrUrl</span> <span class='hs-conid'>DefaultRemoteDarcs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>tempout</span> <span class='hs-conid'>Cachable</span>
<a name="line-302"></a>       <span class='hs-varid'>return</span> <span class='hs-conid'>True</span>
<a name="line-303"></a>     <span class='hs-varop'>`catchNonSignal`</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>return</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span>
<a name="line-304"></a>
<a name="line-305"></a><a name="fetchFileUsingCachePrivate"></a><span class='hs-definition'>fetchFileUsingCachePrivate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FromWhere</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-306"></a><span class='hs-definition'>fetchFileUsingCachePrivate</span> <span class='hs-varid'>fromWhere</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cache</span><span class='hs-layout'>)</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span>
<a name="line-307"></a>    <span class='hs-keyword'>do</span> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromWhere</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Anywhere</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>copyFileUsingCache</span> <span class='hs-conid'>ActuallyCopy</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cache</span><span class='hs-layout'>)</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>f</span>
<a name="line-308"></a>       <span class='hs-varid'>filterBadSources</span> <span class='hs-varid'>cache</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-varid'>ffuc</span>
<a name="line-309"></a>    <span class='hs-varop'>`catchall`</span> <span class='hs-varid'>debugFail</span> <span class='hs-layout'>(</span><span class='hs-str'>"Couldn't fetch `"</span><span class='hs-varop'>++</span><span class='hs-varid'>f</span><span class='hs-varop'>++</span><span class='hs-str'>"'\nin subdir "</span><span class='hs-varop'>++</span> <span class='hs-varid'>hashedDir</span> <span class='hs-varid'>subdir</span> <span class='hs-varop'>++</span>
<a name="line-310"></a>                          <span class='hs-str'>" from sources:\n\n"</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cache</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-311"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>ffuc</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-312"></a>           <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>writable</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varop'>&amp;&amp;</span> <span class='hs-layout'>(</span><span class='hs-conid'>Anywhere</span> <span class='hs-varop'>==</span> <span class='hs-varid'>fromWhere</span> <span class='hs-varop'>||</span> <span class='hs-varid'>isFile</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-313"></a>              <span class='hs-keyword'>do</span> <span class='hs-varid'>debugMessage</span> <span class='hs-varop'>$</span> <span class='hs-str'>"In fetchFileUsingCachePrivate I'm going manually"</span>
<a name="line-314"></a>                 <span class='hs-varid'>debugMessage</span> <span class='hs-varop'>$</span> <span class='hs-str'>"    getting "</span><span class='hs-varop'>++</span><span class='hs-varid'>f</span>
<a name="line-315"></a>                 <span class='hs-varid'>debugMessage</span> <span class='hs-varop'>$</span> <span class='hs-str'>"    from "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span>
<a name="line-316"></a>                 <span class='hs-varid'>x</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>gzFetchFilePS</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-conid'>Cachable</span>
<a name="line-317"></a>                 <span class='hs-keyword'>if</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkHash</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-318"></a>                    <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>x'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>fetchFilePS</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-conid'>Cachable</span>
<a name="line-319"></a>                            <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkHash</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-320"></a>                                 <span class='hs-keyword'>do</span> <span class='hs-varid'>hPutStrLn</span> <span class='hs-varid'>stderr</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Hash failure in "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span>
<a name="line-321"></a>                                    <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Hash failure in "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span>
<a name="line-322"></a>                            <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span>
<a name="line-323"></a>                    <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- FIXME: create links in caches</span>
<a name="line-324"></a>              <span class='hs-varop'>`catchNonSignal`</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>e</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>do</span>
<a name="line-325"></a>                                      <span class='hs-varid'>checkCacheReachability</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-326"></a>                                      <span class='hs-varid'>filterBadSources</span> <span class='hs-varid'>cs</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-varid'>ffuc</span><span class='hs-layout'>)</span>
<a name="line-327"></a>
<a name="line-328"></a>
<a name="line-329"></a>           <span class='hs-keyglyph'>|</span> <span class='hs-varid'>writable</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span>
<a name="line-330"></a>              <span class='hs-keyword'>do</span> <span class='hs-varid'>x1</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>gzFetchFilePS</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-conid'>Cachable</span>
<a name="line-331"></a>                 <span class='hs-varid'>x</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkHash</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x1</span>
<a name="line-332"></a>                      <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>x2</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>fetchFilePS</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-conid'>Cachable</span>
<a name="line-333"></a>                              <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkHash</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x2</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-334"></a>                                 <span class='hs-keyword'>do</span> <span class='hs-varid'>hPutStrLn</span> <span class='hs-varid'>stderr</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Hash failure in "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span>
<a name="line-335"></a>                                    <span class='hs-varid'>removeFile</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span>
<a name="line-336"></a>                                    <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Hash failure in "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span>
<a name="line-337"></a>                              <span class='hs-varid'>return</span> <span class='hs-varid'>x2</span>
<a name="line-338"></a>                      <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>x1</span>
<a name="line-339"></a>                 <span class='hs-varid'>mapM_</span> <span class='hs-layout'>(</span><span class='hs-varid'>tryLinking</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>cs</span>
<a name="line-340"></a>                 <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-341"></a>              <span class='hs-varop'>`catchNonSignal`</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-342"></a>                                 <span class='hs-keyword'>do</span> <span class='hs-varid'>createCache</span> <span class='hs-varid'>c</span> <span class='hs-varid'>subdir</span> <span class='hs-varop'>`catchall`</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span> <span class='hs-comment'>-- don't worry</span>
<a name="line-343"></a>                                    <span class='hs-varid'>checkCacheReachability</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-344"></a>                                    <span class='hs-layout'>(</span><span class='hs-varid'>fname</span><span class='hs-layout'>,</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>filterBadSources</span> <span class='hs-varid'>cs</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-varid'>ffuc</span>
<a name="line-345"></a>                                    <span class='hs-keyword'>do</span> <span class='hs-varid'>createLink</span> <span class='hs-varid'>fname</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-346"></a>                                       <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-347"></a>                                     <span class='hs-varop'>`catchall`</span>
<a name="line-348"></a>                                      <span class='hs-keyword'>do</span> <span class='hs-varid'>gzWriteFilePS</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <span class='hs-varop'>`catchall`</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-349"></a>                                         <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fname</span><span class='hs-layout'>,</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-350"></a>           <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ffuc</span> <span class='hs-varid'>cs</span>
<a name="line-351"></a>
<a name="line-352"></a>          <span class='hs-varid'>ffuc</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debugFail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"No sources from which to fetch file `"</span><span class='hs-varop'>++</span><span class='hs-varid'>f</span><span class='hs-varop'>++</span><span class='hs-str'>"'\n"</span><span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cache</span><span class='hs-layout'>)</span>
<a name="line-353"></a>
<a name="line-354"></a>          <span class='hs-varid'>tryLinking</span> <span class='hs-varid'>ff</span> <span class='hs-varid'>c</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Directory</span> <span class='hs-conid'>Writable</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-355"></a>              <span class='hs-keyword'>do</span> <span class='hs-varid'>createDirectoryIfMissing</span> <span class='hs-conid'>False</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span><span class='hs-varop'>++</span><span class='hs-str'>"/"</span><span class='hs-varop'>++</span><span class='hs-layout'>(</span><span class='hs-varid'>hashedDir</span> <span class='hs-varid'>subdir</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-356"></a>                 <span class='hs-varid'>createLink</span> <span class='hs-varid'>ff</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-357"></a>              <span class='hs-varop'>`catchall`</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-358"></a>          <span class='hs-varid'>tryLinking</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-359"></a>          <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hashedFilePath</span> <span class='hs-varid'>c</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>f</span>
<a name="line-360"></a>
<a name="line-361"></a><a name="createCache"></a><span class='hs-definition'>createCache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CacheLoc</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-362"></a><span class='hs-definition'>createCache</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Directory</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>subdir</span> <span class='hs-keyglyph'>=</span>
<a name="line-363"></a>    <span class='hs-varid'>createDirectoryIfMissing</span> <span class='hs-conid'>True</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span> <span class='hs-varop'>++</span> <span class='hs-str'>"/"</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>hashedDir</span> <span class='hs-varid'>subdir</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-364"></a><span class='hs-definition'>createCache</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-365"></a>
<a name="line-366"></a><a name="write"></a><span class='hs-comment'>-- | @write compression filename content@ writes @content@ to the file @filename@ according</span>
<a name="line-367"></a><span class='hs-comment'>-- to the policy given by @compression@.</span>
<a name="line-368"></a><span class='hs-definition'>write</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Compression</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-369"></a><span class='hs-definition'>write</span> <span class='hs-conid'>NoCompression</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>writeAtomicFilePS</span>
<a name="line-370"></a><span class='hs-definition'>write</span> <span class='hs-conid'>GzipCompression</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gzWriteAtomicFilePS</span>
<a name="line-371"></a>
<a name="line-372"></a><a name="writeFileUsingCache"></a><span class='hs-comment'>-- | @writeFileUsingCache cache compression subdir contents@ write the string @contents@ to</span>
<a name="line-373"></a><span class='hs-comment'>-- the directory subdir, except if it is already in the cache, in which case it is a noop.</span>
<a name="line-374"></a><span class='hs-comment'>-- Warning (?) this means that in case of a hash collision, writing using writeFileUsingCache is</span>
<a name="line-375"></a><span class='hs-comment'>-- a noop. The returned value is the filename that was given to the string.</span>
<a name="line-376"></a><span class='hs-definition'>writeFileUsingCache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Compression</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span>
<a name="line-377"></a><span class='hs-definition'>writeFileUsingCache</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cache</span><span class='hs-layout'>)</span> <span class='hs-varid'>compr</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span>
<a name="line-378"></a>    <span class='hs-layout'>(</span><span class='hs-varid'>fetchFileUsingCachePrivate</span> <span class='hs-conid'>LocalOnly</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cache</span><span class='hs-layout'>)</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>hash</span> <span class='hs-varop'>&gt;&gt;</span> <span class='hs-varid'>return</span> <span class='hs-varid'>hash</span><span class='hs-layout'>)</span> <span class='hs-varop'>`catchall`</span>
<a name="line-379"></a>    <span class='hs-varid'>wfuc</span> <span class='hs-varid'>cache</span> <span class='hs-varop'>`catchall`</span>
<a name="line-380"></a>         <span class='hs-varid'>debugFail</span> <span class='hs-layout'>(</span><span class='hs-str'>"Couldn't write `"</span><span class='hs-varop'>++</span><span class='hs-varid'>hash</span><span class='hs-varop'>++</span><span class='hs-str'>"'\nin subdir "</span><span class='hs-varop'>++</span><span class='hs-layout'>(</span><span class='hs-varid'>hashedDir</span> <span class='hs-varid'>subdir</span><span class='hs-layout'>)</span><span class='hs-varop'>++</span><span class='hs-str'>" to sources:\n\n"</span><span class='hs-varop'>++</span>
<a name="line-381"></a>                    <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cache</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-382"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>hash</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cacheHash</span> <span class='hs-varid'>ps</span>
<a name="line-383"></a>          <span class='hs-varid'>wfuc</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>writable</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>wfuc</span> <span class='hs-varid'>cs</span>
<a name="line-384"></a>                      <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>createCache</span> <span class='hs-varid'>c</span> <span class='hs-varid'>subdir</span>
<a name="line-385"></a>                                       <span class='hs-varid'>write</span> <span class='hs-varid'>compr</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>ps</span> <span class='hs-comment'>-- FIXME: create links in caches</span>
<a name="line-386"></a>                                       <span class='hs-varid'>return</span> <span class='hs-varid'>hash</span>
<a name="line-387"></a>          <span class='hs-varid'>wfuc</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debugFail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"No location to write file `"</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>hashedDir</span> <span class='hs-varid'>subdir</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span><span class='hs-str'>"/"</span><span class='hs-varop'>++</span><span class='hs-varid'>hash</span> <span class='hs-varop'>++</span> <span class='hs-str'>"'"</span>
<a name="line-388"></a>          <span class='hs-varid'>fn</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hashedFilePath</span> <span class='hs-varid'>c</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>hash</span>
<a name="line-389"></a>
<a name="line-390"></a><a name="cleanCaches"></a><span class='hs-definition'>cleanCaches</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-391"></a><span class='hs-definition'>cleanCaches</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cleanCachesWithHint'</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-conid'>Nothing</span>
<a name="line-392"></a>
<a name="line-393"></a><a name="cleanCachesWithHint"></a><span class='hs-definition'>cleanCachesWithHint</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-394"></a><span class='hs-definition'>cleanCachesWithHint</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cleanCachesWithHint'</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-395"></a>
<a name="line-396"></a><a name="cleanCachesWithHint'"></a><span class='hs-definition'>cleanCachesWithHint'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>HashedDir</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-397"></a><span class='hs-definition'>cleanCachesWithHint'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ca</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-varid'>subdir</span> <span class='hs-varid'>hint</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapM_</span> <span class='hs-varid'>cleanCache</span> <span class='hs-varid'>cs</span>
<a name="line-398"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>cleanCache</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-conid'>Directory</span> <span class='hs-conid'>Writable</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-399"></a>             <span class='hs-layout'>(</span><span class='hs-varid'>withCurrentDirectory</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span><span class='hs-varop'>++</span><span class='hs-str'>"/"</span><span class='hs-varop'>++</span><span class='hs-layout'>(</span><span class='hs-varid'>hashedDir</span> <span class='hs-varid'>subdir</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-400"></a>              <span class='hs-keyword'>do</span> <span class='hs-varid'>fs'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>getDirectoryContents</span> <span class='hs-str'>"."</span>
<a name="line-401"></a>                 <span class='hs-keyword'>let</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-varid'>fs'</span> <span class='hs-varid'>hint</span>
<a name="line-402"></a>                 <span class='hs-varid'>mapM_</span> <span class='hs-varid'>clean</span> <span class='hs-varop'>$</span> <span class='hs-varid'>progressList</span> <span class='hs-layout'>(</span><span class='hs-str'>"Cleaning cache "</span><span class='hs-varop'>++</span><span class='hs-varid'>d</span><span class='hs-varop'>++</span><span class='hs-str'>"/"</span><span class='hs-varop'>++</span><span class='hs-layout'>(</span><span class='hs-varid'>hashedDir</span> <span class='hs-varid'>subdir</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-403"></a>                       <span class='hs-varid'>filter</span> <span class='hs-varid'>okayHash</span> <span class='hs-varid'>fs</span><span class='hs-layout'>)</span> <span class='hs-varop'>`catchall`</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-404"></a>          <span class='hs-varid'>cleanCache</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-405"></a>          <span class='hs-varid'>clean</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>lc</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>linkCount</span> <span class='hs-varop'>`liftM`</span> <span class='hs-varid'>getSymbolicLinkStatus</span> <span class='hs-varid'>f</span>
<a name="line-406"></a>                       <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>lc</span> <span class='hs-varop'>&lt;</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>removeFile</span> <span class='hs-varid'>f</span>
<a name="line-407"></a>                    <span class='hs-varop'>`catchall`</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-408"></a>
<a name="line-409"></a><a name="reportBadSources"></a><span class='hs-comment'>-- | Prints an error message with a list of bad caches.</span>
<a name="line-410"></a><span class='hs-definition'>reportBadSources</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-411"></a><span class='hs-definition'>reportBadSources</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-412"></a>  <span class='hs-varid'>sources</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>getBadSourcesList</span>
<a name="line-413"></a>  <span class='hs-keyword'>let</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>sources</span>
<a name="line-414"></a>  <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>null</span> <span class='hs-varid'>sources</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-415"></a>   <span class='hs-varid'>hPutStrLn</span> <span class='hs-varid'>stderr</span> <span class='hs-varop'>$</span>
<a name="line-416"></a>    <span class='hs-varid'>concat</span> <span class='hs-keyglyph'>[</span> <span class='hs-str'>"\nHINT: I could not reach the following "</span><span class='hs-layout'>,</span> <span class='hs-varid'>englishNum</span> <span class='hs-varid'>size</span>  <span class='hs-layout'>(</span><span class='hs-conid'>Noun</span> <span class='hs-str'>"repository"</span><span class='hs-layout'>)</span> <span class='hs-str'>":"</span>
<a name="line-417"></a>           <span class='hs-layout'>,</span> <span class='hs-str'>"\n"</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>intercalate</span> <span class='hs-str'>"\n"</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-str'>"        "</span> <span class='hs-varop'>++</span><span class='hs-layout'>)</span> <span class='hs-varid'>sources</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-418"></a>           <span class='hs-layout'>,</span> <span class='hs-str'>"\n      If you're not using "</span><span class='hs-layout'>,</span> <span class='hs-varid'>englishNum</span> <span class='hs-varid'>size</span> <span class='hs-conid'>It</span> <span class='hs-str'>", you should probably delete"</span>
<a name="line-419"></a>           <span class='hs-layout'>,</span> <span class='hs-str'>"\n      the corresponding "</span><span class='hs-layout'>,</span> <span class='hs-varid'>englishNum</span> <span class='hs-varid'>size</span> <span class='hs-layout'>(</span><span class='hs-conid'>Noun</span> <span class='hs-str'>"entry"</span><span class='hs-layout'>)</span> <span class='hs-str'>" from _darcs/prefs/sources."</span>
<a name="line-420"></a>           <span class='hs-keyglyph'>]</span>
</pre></body>
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