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<title>lib/Filesystem/Path.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_GHC -fno-warn-orphans #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-comment'>-- |</span>
<a name="line-4"></a><span class='hs-comment'>-- Module: Filesystem.Path</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright: 2010 John Millikin</span>
<a name="line-6"></a><span class='hs-comment'>-- License: MIT</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer: jmillikin@gmail.com</span>
<a name="line-9"></a><span class='hs-comment'>-- Portability: portable</span>
<a name="line-10"></a><span class='hs-comment'>--</span>
<a name="line-11"></a><span class='hs-comment'>-- High&#x2010;level, byte&#x2010;based file and directory path</span>
<a name="line-12"></a><span class='hs-comment'>-- manipulations. You probably want to import "Filesystem.Path.CurrentOS"</span>
<a name="line-13"></a><span class='hs-comment'>-- instead, since it handles detecting which rules to use in the current</span>
<a name="line-14"></a><span class='hs-comment'>-- compilation.</span>
<a name="line-15"></a><span class='hs-comment'>--</span>
<a name="line-16"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Filesystem</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span>
<a name="line-17"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>FilePath</span>
<a name="line-18"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>empty</span>
<a name="line-19"></a>
<a name="line-20"></a> <span class='hs-comment'>-- * Basic properties</span>
<a name="line-21"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>null</span>
<a name="line-22"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>root</span>
<a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>directory</span>
<a name="line-24"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>parent</span>
<a name="line-25"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>filename</span>
<a name="line-26"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>dirname</span>
<a name="line-27"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>basename</span>
<a name="line-28"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>absolute</span>
<a name="line-29"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>relative</span>
<a name="line-30"></a>
<a name="line-31"></a> <span class='hs-comment'>-- * Basic operations</span>
<a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>append</span>
<a name="line-33"></a> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'></></span><span class='hs-layout'>)</span>
<a name="line-34"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>concat</span>
<a name="line-35"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>commonPrefix</span>
<a name="line-36"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>stripPrefix</span>
<a name="line-37"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>collapse</span>
<a name="line-38"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>splitDirectories</span>
<a name="line-39"></a>
<a name="line-40"></a> <span class='hs-comment'>-- * Extensions</span>
<a name="line-41"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>extension</span>
<a name="line-42"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>extensions</span>
<a name="line-43"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>hasExtension</span>
<a name="line-44"></a>
<a name="line-45"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>addExtension</span>
<a name="line-46"></a> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'><.></span><span class='hs-layout'>)</span>
<a name="line-47"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>dropExtension</span>
<a name="line-48"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>replaceExtension</span>
<a name="line-49"></a>
<a name="line-50"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>addExtensions</span>
<a name="line-51"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>dropExtensions</span>
<a name="line-52"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>replaceExtensions</span>
<a name="line-53"></a>
<a name="line-54"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>splitExtension</span>
<a name="line-55"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>splitExtensions</span>
<a name="line-56"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-57"></a>
<a name="line-58"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-conid'>FilePath</span><span class='hs-layout'>,</span> <span class='hs-varid'>concat</span><span class='hs-layout'>,</span> <span class='hs-varid'>null</span><span class='hs-layout'>)</span>
<a name="line-59"></a>
<a name="line-60"></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'>foldl'</span><span class='hs-layout'>)</span>
<a name="line-61"></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'>isNothing</span><span class='hs-layout'>)</span>
<a name="line-62"></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'>Monoid</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>M</span>
<a name="line-63"></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'>Text</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span>
<a name="line-64"></a>
<a name="line-65"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Filesystem</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="instance%20M.Monoid%20FilePath"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyword'>where</span>
<a name="line-68"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span>
<a name="line-69"></a> <span class='hs-varid'>mappend</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>append</span>
<a name="line-70"></a> <span class='hs-varid'>mconcat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span>
<a name="line-71"></a>
<a name="line-72"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-73"></a><span class='hs-comment'>-- Basic properties</span>
<a name="line-74"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-75"></a>
<a name="line-76"></a><a name="null"></a><span class='hs-comment'>-- | @null p = (p == 'empty')@</span>
<a name="line-77"></a><span class='hs-definition'>null</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-78"></a><span class='hs-definition'>null</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-79"></a>
<a name="line-80"></a><a name="root"></a><span class='hs-comment'>-- | Retrieves the 'FilePath'&#x2019;s root.</span>
<a name="line-81"></a><span class='hs-definition'>root</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-82"></a><span class='hs-definition'>root</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathRoot</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>p</span> <span class='hs-layout'>}</span>
<a name="line-83"></a>
<a name="line-84"></a><a name="directory"></a><span class='hs-comment'>-- | Retrieves the 'FilePath'&#x2019;s directory. If the path is already a</span>
<a name="line-85"></a><span class='hs-comment'>-- directory, it is returned unchanged.</span>
<a name="line-86"></a><span class='hs-definition'>directory</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-87"></a><span class='hs-definition'>directory</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span>
<a name="line-88"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>pathRoot</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>p</span>
<a name="line-89"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span>
<a name="line-90"></a> <span class='hs-varid'>starts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-conid'>Just</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>dot</span><span class='hs-layout'>,</span> <span class='hs-varid'>dots</span><span class='hs-keyglyph'>]</span>
<a name="line-91"></a> <span class='hs-varid'>dot'</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>safeHead</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>starts</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-92"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isNothing</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathRoot</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>dot</span><span class='hs-keyglyph'>]</span>
<a name="line-93"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-94"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>dot'</span> <span class='hs-varop'>++</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>p</span>
<a name="line-95"></a> <span class='hs-layout'>}</span>
<a name="line-96"></a>
<a name="line-97"></a><a name="parent"></a><span class='hs-comment'>-- | Retrieves the 'FilePath'&#x2019;s parent directory.</span>
<a name="line-98"></a><span class='hs-definition'>parent</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-99"></a><span class='hs-definition'>parent</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span>
<a name="line-100"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>pathRoot</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>p</span>
<a name="line-101"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span>
<a name="line-102"></a> <span class='hs-varid'>starts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-conid'>Just</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>dot</span><span class='hs-layout'>,</span> <span class='hs-varid'>dots</span><span class='hs-keyglyph'>]</span>
<a name="line-103"></a> <span class='hs-varid'>directories</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-layout'>(</span><span class='hs-varid'>filename</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-104"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>safeInit</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-105"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>p</span>
<a name="line-106"></a>
<a name="line-107"></a> <span class='hs-varid'>dot'</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>safeHead</span> <span class='hs-varid'>directories</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>starts</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-108"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isNothing</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathRoot</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>dot</span><span class='hs-keyglyph'>]</span>
<a name="line-109"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-110"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>dot'</span> <span class='hs-varop'>++</span> <span class='hs-varid'>directories</span>
<a name="line-111"></a> <span class='hs-layout'>}</span>
<a name="line-112"></a>
<a name="line-113"></a><a name="filename"></a><span class='hs-comment'>-- | Retrieve a 'FilePath'&#x2019;s filename component.</span>
<a name="line-114"></a><span class='hs-comment'>--</span>
<a name="line-115"></a><span class='hs-comment'>-- @</span>
<a name="line-116"></a><span class='hs-comment'>-- filename \"foo\/bar.txt\" == \"bar.txt\"</span>
<a name="line-117"></a><span class='hs-comment'>-- @</span>
<a name="line-118"></a><span class='hs-definition'>filename</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-119"></a><span class='hs-definition'>filename</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span>
<a name="line-120"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>pathBasename</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pathBasename</span> <span class='hs-varid'>p</span>
<a name="line-121"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>p</span>
<a name="line-122"></a> <span class='hs-layout'>}</span>
<a name="line-123"></a>
<a name="line-124"></a><a name="dirname"></a><span class='hs-comment'>-- | Retrieve a 'FilePath'&#x2019;s directory name. This is only the</span>
<a name="line-125"></a><span class='hs-comment'>-- /file name/ of the directory, not its full path.</span>
<a name="line-126"></a><span class='hs-comment'>--</span>
<a name="line-127"></a><span class='hs-comment'>-- @</span>
<a name="line-128"></a><span class='hs-comment'>-- dirname \"foo\/bar\/baz.txt\" == \"bar\"</span>
<a name="line-129"></a><span class='hs-comment'>-- dirname \"/\" == \"\"</span>
<a name="line-130"></a><span class='hs-comment'>-- @</span>
<a name="line-131"></a><span class='hs-comment'>--</span>
<a name="line-132"></a><span class='hs-comment'>-- Since: 0.4.1</span>
<a name="line-133"></a><span class='hs-definition'>dirname</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-134"></a><span class='hs-definition'>dirname</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>reverse</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-135"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>[]</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>[]</span>
<a name="line-136"></a> <span class='hs-layout'>(</span><span class='hs-varid'>d</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>parseFilename</span> <span class='hs-varid'>d</span> <span class='hs-keyword'>of</span>
<a name="line-137"></a> <span class='hs-layout'>(</span><span class='hs-varid'>base</span><span class='hs-layout'>,</span> <span class='hs-varid'>exts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>base</span> <span class='hs-varid'>exts</span>
<a name="line-138"></a>
<a name="line-139"></a><a name="basename"></a><span class='hs-comment'>-- | Retrieve a 'FilePath'&#x2019;s basename component.</span>
<a name="line-140"></a><span class='hs-comment'>--</span>
<a name="line-141"></a><span class='hs-comment'>-- @</span>
<a name="line-142"></a><span class='hs-comment'>-- basename \"foo/bar.txt\" == \"bar\"</span>
<a name="line-143"></a><span class='hs-comment'>-- @</span>
<a name="line-144"></a><span class='hs-definition'>basename</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-145"></a><span class='hs-definition'>basename</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span>
<a name="line-146"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>pathBasename</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pathBasename</span> <span class='hs-varid'>p</span>
<a name="line-147"></a> <span class='hs-layout'>}</span>
<a name="line-148"></a>
<a name="line-149"></a><a name="absolute"></a><span class='hs-comment'>-- | Test whether a path is absolute.</span>
<a name="line-150"></a><span class='hs-definition'>absolute</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-151"></a><span class='hs-definition'>absolute</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span>
<a name="line-152"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>RootPosix</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-153"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>RootWindowsVolume</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-154"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>False</span>
<a name="line-155"></a>
<a name="line-156"></a><a name="relative"></a><span class='hs-comment'>-- | Test whether a path is relative.</span>
<a name="line-157"></a><span class='hs-definition'>relative</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-158"></a><span class='hs-definition'>relative</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span>
<a name="line-159"></a> <span class='hs-conid'>Just</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>False</span>
<a name="line-160"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-161"></a>
<a name="line-162"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-163"></a><span class='hs-comment'>-- Basic operations</span>
<a name="line-164"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-165"></a>
<a name="line-166"></a><a name="append"></a><span class='hs-comment'>-- | Appends two 'FilePath's. If the second path is absolute, it is returned</span>
<a name="line-167"></a><span class='hs-comment'>-- unchanged.</span>
<a name="line-168"></a><span class='hs-definition'>append</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'>FilePath</span>
<a name="line-169"></a><span class='hs-definition'>append</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cased</span> <span class='hs-keyword'>where</span>
<a name="line-170"></a> <span class='hs-varid'>cased</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>y</span> <span class='hs-keyword'>of</span>
<a name="line-171"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>RootPosix</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>y</span>
<a name="line-172"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>RootWindowsVolume</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>y</span>
<a name="line-173"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>RootWindowsCurrentVolume</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-174"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>RootWindowsVolume</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>y</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathRoot</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>x</span> <span class='hs-layout'>}</span>
<a name="line-175"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>y</span>
<a name="line-176"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>xy</span>
<a name="line-177"></a> <span class='hs-varid'>xy</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>y</span>
<a name="line-178"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>pathRoot</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>x</span>
<a name="line-179"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>directories</span>
<a name="line-180"></a> <span class='hs-layout'>}</span>
<a name="line-181"></a> <span class='hs-varid'>directories</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>xDirectories</span> <span class='hs-varop'>++</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>y</span>
<a name="line-182"></a> <span class='hs-varid'>xDirectories</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>x</span> <span class='hs-varop'>++</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-layout'>(</span><span class='hs-varid'>filename</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-183"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>[]</span>
<a name="line-184"></a> <span class='hs-keyword'>else</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>filenameChunk</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span>
<a name="line-185"></a>
<a name="line-186"></a><a name="%3c/%3e"></a><span class='hs-comment'>-- | An alias for 'append'.</span>
<a name="line-187"></a><span class='hs-layout'>(</span><span class='hs-varop'></></span><span class='hs-layout'>)</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'>FilePath</span>
<a name="line-188"></a><span class='hs-layout'>(</span><span class='hs-varop'></></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>append</span>
<a name="line-189"></a>
<a name="line-190"></a><a name="concat"></a><span class='hs-comment'>-- | A fold over 'append'.</span>
<a name="line-191"></a><span class='hs-definition'>concat</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-192"></a><span class='hs-definition'>concat</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span>
<a name="line-193"></a><span class='hs-definition'>concat</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr1</span> <span class='hs-varid'>append</span> <span class='hs-varid'>ps</span>
<a name="line-194"></a>
<a name="line-195"></a><a name="commonPrefix"></a><span class='hs-comment'>-- | Find the greatest common prefix between a list of 'FilePath's.</span>
<a name="line-196"></a><span class='hs-definition'>commonPrefix</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-197"></a><span class='hs-definition'>commonPrefix</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span>
<a name="line-198"></a><span class='hs-definition'>commonPrefix</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr1</span> <span class='hs-varid'>step</span> <span class='hs-varid'>ps</span> <span class='hs-keyword'>where</span>
<a name="line-199"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>x</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>y</span>
<a name="line-200"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>empty</span>
<a name="line-201"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>commonDirectories</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyword'>in</span>
<a name="line-202"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>cs</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>x</span> <span class='hs-varop'>||</span> <span class='hs-varid'>pathBasename</span> <span class='hs-varid'>x</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>pathBasename</span> <span class='hs-varid'>y</span>
<a name="line-203"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>empty</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathRoot</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cs</span> <span class='hs-layout'>}</span>
<a name="line-204"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>exts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>commonExtensions</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyword'>in</span>
<a name="line-205"></a> <span class='hs-varid'>x</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>exts</span> <span class='hs-layout'>}</span>
<a name="line-206"></a>
<a name="line-207"></a> <span class='hs-varid'>commonDirectories</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>common</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-208"></a> <span class='hs-varid'>commonExtensions</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>common</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-209"></a>
<a name="line-210"></a> <span class='hs-varid'>common</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-211"></a> <span class='hs-varid'>common</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-212"></a> <span class='hs-varid'>common</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-conop'>:</span><span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>y</span>
<a name="line-213"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>x</span> <span class='hs-conop'>:</span> <span class='hs-varid'>common</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span>
<a name="line-214"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>[]</span>
<a name="line-215"></a>
<a name="line-216"></a><a name="stripPrefix"></a><span class='hs-comment'>-- | Remove a prefix from a path.</span>
<a name="line-217"></a><span class='hs-comment'>--</span>
<a name="line-218"></a><span class='hs-comment'>-- @</span>
<a name="line-219"></a><span class='hs-comment'>-- 'stripPrefix' \"/foo/\" \"/foo/bar/baz.txt\" == Just \"bar/baz.txt\"</span>
<a name="line-220"></a><span class='hs-comment'>-- 'stripPrefix' \"/foo/\" \"/bar/baz.txt\" == Nothing</span>
<a name="line-221"></a><span class='hs-comment'>-- @</span>
<a name="line-222"></a><span class='hs-comment'>--</span>
<a name="line-223"></a><span class='hs-comment'>-- Since: 0.4.1</span>
<a name="line-224"></a><span class='hs-definition'>stripPrefix</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'>Maybe</span> <span class='hs-conid'>FilePath</span>
<a name="line-225"></a><span class='hs-definition'>stripPrefix</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>x</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>y</span>
<a name="line-226"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-227"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varid'>y</span>
<a name="line-228"></a> <span class='hs-conid'>Just</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-229"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-230"></a> <span class='hs-varid'>dirs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>strip</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-231"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>dirs</span> <span class='hs-keyword'>of</span>
<a name="line-232"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathBasename</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>pathBasename</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-233"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-234"></a> <span class='hs-varid'>exts</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>strip</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-235"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathRoot</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dirs</span><span class='hs-layout'>,</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>exts</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-236"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-237"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathRoot</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dirs</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-238"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-239"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>x_b</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>y_b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x_b</span> <span class='hs-varop'>==</span> <span class='hs-varid'>y_b</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-240"></a> <span class='hs-varid'>exts</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>strip</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-241"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>empty</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>exts</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-242"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-243"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathBasename</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-244"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathRoot</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dirs</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-245"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-246"></a>
<a name="line-247"></a><a name="strip"></a><span class='hs-definition'>strip</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>
<a name="line-248"></a><span class='hs-definition'>strip</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>ys</span>
<a name="line-249"></a><span class='hs-definition'>strip</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-250"></a><span class='hs-definition'>strip</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-conop'>:</span><span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>y</span>
<a name="line-251"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>strip</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span>
<a name="line-252"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-253"></a>
<a name="line-254"></a><a name="collapse"></a><span class='hs-comment'>-- | Remove @\".\"@ and @\"..\"@ directories from a path.</span>
<a name="line-255"></a><span class='hs-comment'>--</span>
<a name="line-256"></a><span class='hs-comment'>-- Note that if any of the elements are symbolic links, 'collapse' may change</span>
<a name="line-257"></a><span class='hs-comment'>-- which file the path resolves to.</span>
<a name="line-258"></a><span class='hs-comment'>--</span>
<a name="line-259"></a><span class='hs-comment'>-- Since: 0.2</span>
<a name="line-260"></a><span class='hs-definition'>collapse</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-261"></a><span class='hs-definition'>collapse</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>p</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathDirectories</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>newDirs</span> <span class='hs-layout'>}</span> <span class='hs-keyword'>where</span>
<a name="line-262"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>newDirs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl'</span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-conid'>True</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-263"></a>
<a name="line-264"></a> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-conid'>True</span><span class='hs-layout'>,</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-265"></a> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>dot</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-266"></a> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>dots</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>acc</span> <span class='hs-keyword'>of</span>
<a name="line-267"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-268"></a> <span class='hs-layout'>(</span><span class='hs-varid'>h</span><span class='hs-conop'>:</span><span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-varid'>dot</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-269"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-varid'>dots</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-270"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-271"></a> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-272"></a>
<a name="line-273"></a><a name="splitDirectories"></a><span class='hs-definition'>splitDirectories</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span>
<a name="line-274"></a><span class='hs-definition'>splitDirectories</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>rootName</span> <span class='hs-varop'>++</span> <span class='hs-varid'>dirNames</span> <span class='hs-varop'>++</span> <span class='hs-varid'>fileName</span> <span class='hs-keyword'>where</span>
<a name="line-275"></a> <span class='hs-varid'>rootName</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>pathRoot</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span>
<a name="line-276"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>[]</span>
<a name="line-277"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>asFile</span> <span class='hs-layout'>(</span><span class='hs-varid'>rootChunk</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-278"></a> <span class='hs-varid'>dirNames</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>asFile</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathDirectories</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-279"></a> <span class='hs-varid'>fileName</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathBasename</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-280"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>[]</span>
<a name="line-281"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>filename</span> <span class='hs-varid'>p</span><span class='hs-keyglyph'>]</span>
<a name="line-282"></a>
<a name="line-283"></a> <span class='hs-varid'>asFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Chunk</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-284"></a> <span class='hs-varid'>asFile</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>parseFilename</span> <span class='hs-varid'>c</span> <span class='hs-keyword'>of</span>
<a name="line-285"></a> <span class='hs-layout'>(</span><span class='hs-varid'>base</span><span class='hs-layout'>,</span> <span class='hs-varid'>exts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>empty</span>
<a name="line-286"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>pathBasename</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>base</span>
<a name="line-287"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>exts</span>
<a name="line-288"></a> <span class='hs-layout'>}</span>
<a name="line-289"></a>
<a name="line-290"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-291"></a><span class='hs-comment'>-- Extensions</span>
<a name="line-292"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-293"></a>
<a name="line-294"></a><a name="extension"></a><span class='hs-comment'>-- | Get a 'FilePath'&#x2019;s last extension, or 'Nothing' if it has no</span>
<a name="line-295"></a><span class='hs-comment'>-- extensions.</span>
<a name="line-296"></a><span class='hs-definition'>extension</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span>
<a name="line-297"></a><span class='hs-definition'>extension</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>extensions</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span>
<a name="line-298"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-299"></a> <span class='hs-varid'>es</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>last</span> <span class='hs-varid'>es</span><span class='hs-layout'>)</span>
<a name="line-300"></a>
<a name="line-301"></a><a name="extensions"></a><span class='hs-comment'>-- | Get a 'FilePath'&#x2019;s full extension list.</span>
<a name="line-302"></a><span class='hs-definition'>extensions</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-303"></a><span class='hs-definition'>extensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>unescape'</span> <span class='hs-varop'>.</span> <span class='hs-varid'>pathExtensions</span>
<a name="line-304"></a>
<a name="line-305"></a>
<a name="line-306"></a><a name="hasExtension"></a><span class='hs-comment'>-- | Get whether a 'FilePath'&#x2019;s last extension is the predicate.</span>
<a name="line-307"></a><span class='hs-definition'>hasExtension</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-308"></a><span class='hs-definition'>hasExtension</span> <span class='hs-varid'>p</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>extension</span> <span class='hs-varid'>p</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>e</span>
<a name="line-309"></a>
<a name="line-310"></a><a name="addExtension"></a><span class='hs-comment'>-- | Append an extension to the end of a 'FilePath'.</span>
<a name="line-311"></a><span class='hs-definition'>addExtension</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-312"></a><span class='hs-definition'>addExtension</span> <span class='hs-varid'>p</span> <span class='hs-varid'>ext</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addExtensions</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>ext</span><span class='hs-keyglyph'>]</span>
<a name="line-313"></a>
<a name="line-314"></a><a name="addExtensions"></a><span class='hs-comment'>-- | Append many extensions to the end of a 'FilePath'.</span>
<a name="line-315"></a><span class='hs-definition'>addExtensions</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-316"></a><span class='hs-definition'>addExtensions</span> <span class='hs-varid'>p</span> <span class='hs-varid'>exts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>p</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>newExtensions</span> <span class='hs-layout'>}</span> <span class='hs-keyword'>where</span>
<a name="line-317"></a> <span class='hs-varid'>newExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>p</span> <span class='hs-varop'>++</span> <span class='hs-varid'>map</span> <span class='hs-varid'>escape</span> <span class='hs-varid'>exts</span>
<a name="line-318"></a>
<a name="line-319"></a><a name="%3c.%3e"></a><span class='hs-comment'>-- | An alias for 'addExtension'.</span>
<a name="line-320"></a><span class='hs-layout'>(</span><span class='hs-varop'><.></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-321"></a><span class='hs-layout'>(</span><span class='hs-varop'><.></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addExtension</span>
<a name="line-322"></a>
<a name="line-323"></a><a name="dropExtension"></a><span class='hs-comment'>-- | Remove a 'FilePath'&#x2019;s last extension.</span>
<a name="line-324"></a><span class='hs-definition'>dropExtension</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-325"></a><span class='hs-definition'>dropExtension</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>p</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>safeInit</span> <span class='hs-layout'>(</span><span class='hs-varid'>pathExtensions</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span>
<a name="line-326"></a>
<a name="line-327"></a><a name="dropExtensions"></a><span class='hs-comment'>-- | Remove all extensions from a 'FilePath'.</span>
<a name="line-328"></a><span class='hs-definition'>dropExtensions</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-329"></a><span class='hs-definition'>dropExtensions</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>p</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pathExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>}</span>
<a name="line-330"></a>
<a name="line-331"></a><a name="replaceExtension"></a><span class='hs-comment'>-- | Replace a 'FilePath'&#x2019;s last extension.</span>
<a name="line-332"></a><span class='hs-definition'>replaceExtension</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-333"></a><span class='hs-definition'>replaceExtension</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addExtension</span> <span class='hs-varop'>.</span> <span class='hs-varid'>dropExtension</span>
<a name="line-334"></a>
<a name="line-335"></a><a name="replaceExtensions"></a><span class='hs-comment'>-- | Remove all extensions from a 'FilePath', and replace them with a new</span>
<a name="line-336"></a><span class='hs-comment'>-- list.</span>
<a name="line-337"></a><span class='hs-definition'>replaceExtensions</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span>
<a name="line-338"></a><span class='hs-definition'>replaceExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addExtensions</span> <span class='hs-varop'>.</span> <span class='hs-varid'>dropExtensions</span>
<a name="line-339"></a>
<a name="line-340"></a><a name="splitExtension"></a><span class='hs-comment'>-- | @splitExtension p = ('dropExtension' p, 'extension' p)@</span>
<a name="line-341"></a><span class='hs-definition'>splitExtension</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>FilePath</span><span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-342"></a><span class='hs-definition'>splitExtension</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>dropExtension</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-varid'>extension</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-343"></a>
<a name="line-344"></a><a name="splitExtensions"></a><span class='hs-comment'>-- | @splitExtensions p = ('dropExtensions' p, 'extensions' p)@</span>
<a name="line-345"></a><span class='hs-definition'>splitExtensions</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>FilePath</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-346"></a><span class='hs-definition'>splitExtensions</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>dropExtensions</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-varid'>extensions</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-347"></a>
<a name="line-348"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-349"></a><span class='hs-comment'>-- Utils</span>
<a name="line-350"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-351"></a>
<a name="line-352"></a><a name="safeInit"></a><span class='hs-definition'>safeInit</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>
<a name="line-353"></a><span class='hs-definition'>safeInit</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>of</span>
<a name="line-354"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>[]</span>
<a name="line-355"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>init</span> <span class='hs-varid'>xs</span>
<a name="line-356"></a>
<a name="line-357"></a><a name="safeHead"></a><span class='hs-definition'>safeHead</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span>
<a name="line-358"></a><span class='hs-definition'>safeHead</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-359"></a><span class='hs-definition'>safeHead</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>x</span>
</pre></body>
</html>
