<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ -->
<title>src/System/Path/Glob.hs</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<pre><a name="line-1"></a><span class='hs-comment'>{- Copyright (C) 2006 John Goerzen <jgoerzen@complete.org>
<a name="line-2"></a>
<a name="line-3"></a>This program is free software; you can redistribute it and/or modify
<a name="line-4"></a>it under the terms of the GNU General Public License as published by
<a name="line-5"></a>the Free Software Foundation; either version 2 of the License, or
<a name="line-6"></a>(at your option) any later version.
<a name="line-7"></a>
<a name="line-8"></a>This program is distributed in the hope that it will be useful,
<a name="line-9"></a>but WITHOUT ANY WARRANTY; without even the implied warranty of
<a name="line-10"></a>MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
<a name="line-11"></a>GNU General Public License for more details.
<a name="line-12"></a>
<a name="line-13"></a>You should have received a copy of the GNU General Public License
<a name="line-14"></a>along with this program; if not, write to the Free Software
<a name="line-15"></a>Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
<a name="line-16"></a>-}</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-comment'>{- |
<a name="line-19"></a> Module : System.Path.Glob
<a name="line-20"></a> Copyright : Copyright (C) 2006 John Goerzen
<a name="line-21"></a> License : GNU GPL, version 2 or above
<a name="line-22"></a>
<a name="line-23"></a> Maintainer : John Goerzen <jgoerzen@complete.org>
<a name="line-24"></a> Stability : provisional
<a name="line-25"></a> Portability: portable
<a name="line-26"></a>
<a name="line-27"></a>Functions for expanding wildcards, filenames, and pathnames.
<a name="line-28"></a>
<a name="line-29"></a>For information on the metacharacters recognized, please see the notes
<a name="line-30"></a>in "System.Path.WildMatch".
<a name="line-31"></a>
<a name="line-32"></a>-}</span>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span><span class='hs-varop'>.</span><span class='hs-conid'>Glob</span> <span class='hs-layout'>(</span><span class='hs-varid'>glob</span><span class='hs-layout'>,</span> <span class='hs-varid'>vGlob</span><span class='hs-layout'>)</span>
<a name="line-35"></a> <span class='hs-keyword'>where</span>
<a name="line-36"></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-varop'>.</span><span class='hs-conid'>Utils</span> <span class='hs-layout'>(</span><span class='hs-varid'>hasAny</span><span class='hs-layout'>)</span>
<a name="line-37"></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-varop'>.</span><span class='hs-conid'>HVFS</span>
<a name="line-38"></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-layout'>(</span><span class='hs-varid'>splitFileName</span><span class='hs-layout'>)</span>
<a name="line-39"></a><span class='hs-keyword'>import</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'>tryJust</span><span class='hs-layout'>)</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Path</span><span class='hs-varop'>.</span><span class='hs-conid'>WildMatch</span> <span class='hs-layout'>(</span><span class='hs-varid'>wildCheckCase</span><span class='hs-layout'>)</span>
<a name="line-41"></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'>isSuffixOf</span><span class='hs-layout'>)</span>
<a name="line-42"></a>
<a name="line-43"></a><a name="hasWild"></a><span class='hs-definition'>hasWild</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-44"></a><span class='hs-definition'>hasWild</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasAny</span> <span class='hs-str'>"*?["</span>
<a name="line-45"></a>
<a name="line-46"></a><a name="glob"></a><span class='hs-comment'>{- | Takes a pattern. Returns a list of names that match that pattern.
<a name="line-47"></a>The pattern is evaluated by "System.Path.WildMatch". This function
<a name="line-48"></a>does not perform tilde or environment variable expansion.
<a name="line-49"></a>
<a name="line-50"></a>Filenames that begin with a dot are not included in the result set unless
<a name="line-51"></a>that component of the pattern also begins with a dot.
<a name="line-52"></a>
<a name="line-53"></a>In MissingH, this function is defined as:
<a name="line-54"></a>
<a name="line-55"></a>>glob = vGlob SystemFS
<a name="line-56"></a>-}</span>
<a name="line-57"></a><span class='hs-definition'>glob</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-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span>
<a name="line-58"></a><span class='hs-definition'>glob</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vGlob</span> <span class='hs-conid'>SystemFS</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="vGlob"></a><span class='hs-comment'>{- | Like 'glob', but works on both the system ("real") and HVFS virtual
<a name="line-61"></a>filesystems. -}</span>
<a name="line-62"></a><span class='hs-definition'>vGlob</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HVFS</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</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-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span>
<a name="line-63"></a><span class='hs-definition'>vGlob</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>fn</span> <span class='hs-keyglyph'>=</span>
<a name="line-64"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>hasWild</span> <span class='hs-varid'>fn</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- Don't try globbing if there are no wilds</span>
<a name="line-65"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>de</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>vDoesExist</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>fn</span>
<a name="line-66"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>de</span>
<a name="line-67"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fn</span><span class='hs-keyglyph'>]</span>
<a name="line-68"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-conid'>[]</span>
<a name="line-69"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>expandGlob</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>fn</span> <span class='hs-comment'>-- It's there</span>
<a name="line-70"></a>
<a name="line-71"></a><a name="expandGlob"></a><span class='hs-definition'>expandGlob</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HVFS</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</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-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span>
<a name="line-72"></a><span class='hs-definition'>expandGlob</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>fn</span> <span class='hs-keyglyph'>=</span>
<a name="line-73"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>dirnameslash</span> <span class='hs-keyword'>of</span>
<a name="line-74"></a> <span class='hs-str'>"./"</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>runGlob</span> <span class='hs-varid'>fs</span> <span class='hs-str'>"."</span> <span class='hs-varid'>basename</span>
<a name="line-75"></a> <span class='hs-str'>"/"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-76"></a> <span class='hs-varid'>rgs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runGlob</span> <span class='hs-varid'>fs</span> <span class='hs-str'>"/"</span> <span class='hs-varid'>basename</span>
<a name="line-77"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-chr'>'/'</span> <span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varid'>rgs</span>
<a name="line-78"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>dirlist</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>hasWild</span> <span class='hs-varid'>dirname</span>
<a name="line-79"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>expandGlob</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>dirname</span>
<a name="line-80"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>dirname</span><span class='hs-keyglyph'>]</span>
<a name="line-81"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>hasWild</span> <span class='hs-varid'>basename</span>
<a name="line-82"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>expandWildBase</span> <span class='hs-varid'>dirlist</span>
<a name="line-83"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>concat</span> <span class='hs-varid'>r</span>
<a name="line-84"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>expandNormalBase</span> <span class='hs-varid'>dirlist</span>
<a name="line-85"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>concat</span> <span class='hs-varid'>r</span>
<a name="line-86"></a>
<a name="line-87"></a> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>dirnameslash</span><span class='hs-layout'>,</span> <span class='hs-varid'>basename</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitFileName</span> <span class='hs-varid'>fn</span>
<a name="line-88"></a> <span class='hs-varid'>dirname</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>dirnameslash</span> <span class='hs-keyword'>of</span>
<a name="line-89"></a> <span class='hs-str'>"/"</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"/"</span>
<a name="line-90"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isSuffixOf</span> <span class='hs-str'>"/"</span> <span class='hs-varid'>x</span>
<a name="line-91"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>take</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>x</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-92"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>x</span>
<a name="line-93"></a>
<a name="line-94"></a> <span class='hs-varid'>expandWildBase</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-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span>
<a name="line-95"></a> <span class='hs-varid'>expandWildBase</span> <span class='hs-varid'>dname</span> <span class='hs-keyglyph'>=</span>
<a name="line-96"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>dirglobs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runGlob</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>dname</span> <span class='hs-varid'>basename</span>
<a name="line-97"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>withD</span> <span class='hs-varid'>dirglobs</span>
<a name="line-98"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>withD</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>dname</span> <span class='hs-keyword'>of</span>
<a name="line-99"></a> <span class='hs-str'>""</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>id</span>
<a name="line-100"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>globfn</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>dname</span> <span class='hs-varop'>++</span> <span class='hs-str'>"/"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>globfn</span>
<a name="line-101"></a>
<a name="line-102"></a> <span class='hs-varid'>expandNormalBase</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-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span>
<a name="line-103"></a> <span class='hs-varid'>expandNormalBase</span> <span class='hs-varid'>dname</span> <span class='hs-keyglyph'>=</span>
<a name="line-104"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>isdir</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>vDoesDirectoryExist</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>dname</span>
<a name="line-105"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>newname</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dname</span> <span class='hs-varop'>++</span> <span class='hs-str'>"/"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>basename</span>
<a name="line-106"></a> <span class='hs-varid'>isexists</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>vDoesExist</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>newname</span>
<a name="line-107"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>isexists</span> <span class='hs-varop'>&&</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>basename</span> <span class='hs-varop'>/=</span> <span class='hs-str'>"."</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>basename</span> <span class='hs-varop'>/=</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-varop'>||</span> <span class='hs-varid'>isdir</span><span class='hs-layout'>)</span>
<a name="line-108"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>dname</span> <span class='hs-varop'>++</span> <span class='hs-str'>"/"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>basename</span><span class='hs-keyglyph'>]</span>
<a name="line-109"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-conid'>[]</span>
<a name="line-110"></a>
<a name="line-111"></a><a name="runGlob"></a><span class='hs-definition'>runGlob</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HVFS</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</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-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span>
<a name="line-112"></a><span class='hs-definition'>runGlob</span> <span class='hs-varid'>fs</span> <span class='hs-str'>""</span> <span class='hs-varid'>patt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runGlob</span> <span class='hs-varid'>fs</span> <span class='hs-str'>"."</span> <span class='hs-varid'>patt</span>
<a name="line-113"></a><span class='hs-definition'>runGlob</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>dirname</span> <span class='hs-varid'>patt</span> <span class='hs-keyglyph'>=</span>
<a name="line-114"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>tryJust</span> <span class='hs-varid'>ioErrors</span> <span class='hs-layout'>(</span><span class='hs-varid'>vGetDirectoryContents</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>dirname</span><span class='hs-layout'>)</span>
<a name="line-115"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>of</span>
<a name="line-116"></a> <span class='hs-conid'>Left</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-117"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>names</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>matches</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>wildCheckCase</span> <span class='hs-varid'>patt</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>names</span>
<a name="line-118"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>head</span> <span class='hs-varid'>patt</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'.'</span>
<a name="line-119"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varid'>matches</span>
<a name="line-120"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>head</span> <span class='hs-varid'>x</span> <span class='hs-varop'>/=</span> <span class='hs-chr'>'.'</span><span class='hs-layout'>)</span> <span class='hs-varid'>matches</span>
<a name="line-121"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>ioErrors</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IOError</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>IOError</span>
<a name="line-122"></a> <span class='hs-varid'>ioErrors</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>e</span>
</pre></body>
</html>
