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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_GHC -cpp #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-3"></a>
<a name="line-4"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Workaround</span> <span class='hs-layout'>(</span> <span class='hs-varid'>renameFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>setExecutable</span><span class='hs-layout'>,</span> <span class='hs-varid'>getCurrentDirectory</span><span class='hs-layout'>,</span>
<a name="line-5"></a> <span class='hs-varid'>installHandler</span><span class='hs-layout'>,</span> <span class='hs-varid'>raiseSignal</span><span class='hs-layout'>,</span> <span class='hs-conid'>Handler</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'>Signal</span><span class='hs-layout'>,</span>
<a name="line-6"></a> <span class='hs-varid'>sigINT</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigHUP</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigABRT</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigALRM</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigTERM</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigPIPE</span> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-7"></a>
<a name="line-8"></a><span class='hs-cpp'>#ifdef WIN32</span>
<a name="line-9"></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-layout'>(</span> <span class='hs-varid'>renameFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>getCurrentDirectory</span><span class='hs-layout'>,</span> <span class='hs-varid'>removeFile</span> <span class='hs-layout'>)</span>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span> <span class='hs-layout'>(</span> <span class='hs-varid'>block</span> <span class='hs-layout'>)</span>
<a name="line-11"></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'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span> <span class='hs-layout'>(</span> <span class='hs-varid'>isDoesNotExistError</span><span class='hs-layout'>,</span> <span class='hs-varid'>ioError</span><span class='hs-layout'>,</span> <span class='hs-varid'>catch</span> <span class='hs-layout'>)</span>
<a name="line-12"></a><span class='hs-cpp'>#else</span>
<a name="line-13"></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'>Signals</span><span class='hs-layout'>(</span><span class='hs-varid'>installHandler</span><span class='hs-layout'>,</span> <span class='hs-varid'>raiseSignal</span><span class='hs-layout'>,</span> <span class='hs-conid'>Handler</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'>Signal</span><span class='hs-layout'>,</span>
<a name="line-14"></a> <span class='hs-varid'>sigINT</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigHUP</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigABRT</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigALRM</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigTERM</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigPIPE</span><span class='hs-layout'>)</span>
<a name="line-15"></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'>renameFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>getCurrentDirectory</span> <span class='hs-layout'>)</span>
<a name="line-16"></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'>fileMode</span><span class='hs-layout'>,</span><span class='hs-varid'>getFileStatus</span><span class='hs-layout'>,</span> <span class='hs-varid'>setFileMode</span><span class='hs-layout'>,</span>
<a name="line-17"></a> <span class='hs-varid'>setFileCreationMask</span><span class='hs-layout'>,</span>
<a name="line-18"></a> <span class='hs-varid'>ownerReadMode</span><span class='hs-layout'>,</span> <span class='hs-varid'>ownerWriteMode</span><span class='hs-layout'>,</span> <span class='hs-varid'>ownerExecuteMode</span><span class='hs-layout'>,</span>
<a name="line-19"></a> <span class='hs-varid'>groupReadMode</span><span class='hs-layout'>,</span> <span class='hs-varid'>groupWriteMode</span><span class='hs-layout'>,</span> <span class='hs-varid'>groupExecuteMode</span><span class='hs-layout'>,</span>
<a name="line-20"></a> <span class='hs-varid'>otherReadMode</span><span class='hs-layout'>,</span> <span class='hs-varid'>otherWriteMode</span><span class='hs-layout'>,</span> <span class='hs-varid'>otherExecuteMode</span><span class='hs-layout'>)</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span> <span class='hs-layout'>(</span> <span class='hs-layout'>(</span><span class='hs-varop'>.&.</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>.|.</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>complement</span> <span class='hs-layout'>)</span>
<a name="line-22"></a><span class='hs-cpp'>#endif</span>
<a name="line-23"></a>
<a name="line-24"></a><span class='hs-cpp'>#ifdef WIN32</span>
<a name="line-25"></a><a name="Handler"></a><span class='hs-comment'>-- Dummy implementation of POSIX signals</span>
<a name="line-26"></a><a name="Handler"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Handler</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Default</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Ignore</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Catch</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-27"></a><a name="Signal"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Signal</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Int</span>
<a name="line-28"></a>
<a name="line-29"></a><a name="installHandler"></a><span class='hs-definition'>installHandler</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Signal</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Handler</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-30"></a><span class='hs-definition'>installHandler</span> <span class='hs-keyword'>_</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-31"></a>
<a name="line-32"></a><a name="raiseSignal"></a><span class='hs-definition'>raiseSignal</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Signal</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-33"></a><span class='hs-definition'>raiseSignal</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-34"></a>
<a name="line-35"></a><a name="sigINT"></a><span class='hs-definition'>sigINT</span><span class='hs-layout'>,</span> <span class='hs-comment'>{- sigKILL, -}</span> <span class='hs-varid'>sigHUP</span><span class='hs-layout'>,</span> <span class='hs-comment'>{- sigQUIT, -}</span> <span class='hs-varid'>sigABRT</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigALRM</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigTERM</span><span class='hs-layout'>,</span> <span class='hs-varid'>sigPIPE</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Signal</span>
<a name="line-36"></a><span class='hs-definition'>sigINT</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-37"></a><a name="sigHUP"></a><span class='hs-comment'>-- not used: sigKILL = 0</span>
<a name="line-38"></a><span class='hs-definition'>sigHUP</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-39"></a><a name="sigABRT"></a><span class='hs-comment'>-- not used: sigQUIT = 0</span>
<a name="line-40"></a><span class='hs-definition'>sigABRT</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-41"></a><a name="sigTERM"></a><span class='hs-definition'>sigTERM</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-42"></a><a name="sigPIPE"></a><span class='hs-definition'>sigPIPE</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-43"></a><a name="sigALRM"></a><span class='hs-definition'>sigALRM</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-44"></a>
<a name="line-45"></a><span class='hs-comment'>{-
<a name="line-46"></a>System.Directory.renameFile incorrectly fails when the new file already
<a name="line-47"></a>exists. This code works around that bug at the cost of losing atomic
<a name="line-48"></a>writes.
<a name="line-49"></a>-}</span>
<a name="line-50"></a>
<a name="line-51"></a><a name="renameFile"></a><span class='hs-definition'>renameFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-52"></a><span class='hs-definition'>renameFile</span> <span class='hs-varid'>old</span> <span class='hs-varid'>new</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span><span class='hs-varop'>.</span><span class='hs-varid'>block</span> <span class='hs-varop'>$</span>
<a name="line-53"></a> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span><span class='hs-varop'>.</span><span class='hs-varid'>renameFile</span> <span class='hs-varid'>old</span> <span class='hs-varid'>new</span>
<a name="line-54"></a> <span class='hs-varop'>`</span><span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span><span class='hs-varop'>.</span><span class='hs-varid'>catch</span><span class='hs-varop'>`</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span>
<a name="line-55"></a> <span class='hs-keyword'>do</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span><span class='hs-varop'>.</span><span class='hs-varid'>removeFile</span> <span class='hs-varid'>new</span>
<a name="line-56"></a> <span class='hs-varop'>`</span><span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span><span class='hs-varop'>.</span><span class='hs-varid'>catch</span><span class='hs-varop'>`</span>
<a name="line-57"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span><span class='hs-varop'>.</span><span class='hs-varid'>isDoesNotExistError</span> <span class='hs-varid'>e</span>
<a name="line-58"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-59"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span><span class='hs-varop'>.</span><span class='hs-varid'>ioError</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-60"></a> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span><span class='hs-varop'>.</span><span class='hs-varid'>renameFile</span> <span class='hs-varid'>old</span> <span class='hs-varid'>new</span>
<a name="line-61"></a>
<a name="line-62"></a><a name="setExecutable"></a><span class='hs-definition'>setExecutable</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-63"></a><span class='hs-definition'>setExecutable</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-64"></a>
<a name="line-65"></a><span class='hs-comment'>{-
<a name="line-66"></a>System.Directory.getCurrentDirectory returns a path with backslashes in it
<a name="line-67"></a>under windows, and some of the code gets confused by that, so we override
<a name="line-68"></a>getCurrentDirectory and translates '\\' to '/'
<a name="line-69"></a>-}</span>
<a name="line-70"></a>
<a name="line-71"></a><a name="getCurrentDirectory"></a><span class='hs-definition'>getCurrentDirectory</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>FilePath</span>
<a name="line-72"></a><span class='hs-definition'>getCurrentDirectory</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span><span class='hs-varop'>.</span><span class='hs-varid'>getCurrentDirectory</span>
<a name="line-73"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>rb</span> <span class='hs-varid'>d</span>
<a name="line-74"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>rb</span> <span class='hs-chr'>'\\'</span> <span class='hs-keyglyph'>=</span> <span class='hs-chr'>'/'</span>
<a name="line-75"></a> <span class='hs-varid'>rb</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span>
<a name="line-76"></a>
<a name="line-77"></a><span class='hs-cpp'>#else</span>
<a name="line-78"></a>
<a name="line-79"></a><span class='hs-definition'>setExecutable</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-80"></a><span class='hs-definition'>setExecutable</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ex</span> <span class='hs-keyglyph'>=</span>
<a name="line-81"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>st</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getFileStatus</span> <span class='hs-varid'>f</span>
<a name="line-82"></a> <span class='hs-varid'>umask</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>setFileCreationMask</span> <span class='hs-num'>0</span>
<a name="line-83"></a> <span class='hs-varid'>setFileCreationMask</span> <span class='hs-varid'>umask</span>
<a name="line-84"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>rw</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fileMode</span> <span class='hs-varid'>st</span> <span class='hs-varop'>.&.</span>
<a name="line-85"></a> <span class='hs-layout'>(</span><span class='hs-varid'>ownerReadMode</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>ownerWriteMode</span> <span class='hs-varop'>.|.</span>
<a name="line-86"></a> <span class='hs-varid'>groupReadMode</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>groupWriteMode</span> <span class='hs-varop'>.|.</span>
<a name="line-87"></a> <span class='hs-varid'>otherReadMode</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>otherWriteMode</span><span class='hs-layout'>)</span>
<a name="line-88"></a> <span class='hs-varid'>total</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>ex</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>rw</span> <span class='hs-varop'>.|.</span>
<a name="line-89"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>ownerExecuteMode</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>groupExecuteMode</span> <span class='hs-varop'>.|.</span> <span class='hs-varid'>otherExecuteMode</span><span class='hs-layout'>)</span>
<a name="line-90"></a> <span class='hs-varop'>.&.</span> <span class='hs-varid'>complement</span> <span class='hs-varid'>umask</span><span class='hs-layout'>)</span>
<a name="line-91"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>rw</span>
<a name="line-92"></a> <span class='hs-varid'>setFileMode</span> <span class='hs-varid'>f</span> <span class='hs-varid'>total</span>
<a name="line-93"></a>
<a name="line-94"></a><span class='hs-cpp'>#endif</span>
</pre></body>
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