<?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://code.haskell.org/~malcolm/hscolour/ -->
<title>src/Darcs/Repository/State.hs</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_GHC -fno-warn-orphans #-}</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-comment'>-- Copyright (C) 2009 Petr Rockai</span>
<a name="line-5"></a><span class='hs-comment'>--</span>
<a name="line-6"></a><span class='hs-comment'>-- Permission is hereby granted, free of charge, to any person</span>
<a name="line-7"></a><span class='hs-comment'>-- obtaining a copy of this software and associated documentation</span>
<a name="line-8"></a><span class='hs-comment'>-- files (the "Software"), to deal in the Software without</span>
<a name="line-9"></a><span class='hs-comment'>-- restriction, including without limitation the rights to use, copy,</span>
<a name="line-10"></a><span class='hs-comment'>-- modify, merge, publish, distribute, sublicense, and/or sell copies</span>
<a name="line-11"></a><span class='hs-comment'>-- of the Software, and to permit persons to whom the Software is</span>
<a name="line-12"></a><span class='hs-comment'>-- furnished to do so, subject to the following conditions:</span>
<a name="line-13"></a><span class='hs-comment'>--</span>
<a name="line-14"></a><span class='hs-comment'>-- The above copyright notice and this permission notice shall be</span>
<a name="line-15"></a><span class='hs-comment'>-- included in all copies or substantial portions of the Software.</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a><span class='hs-comment'>-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span>
<a name="line-18"></a><span class='hs-comment'>-- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span>
<a name="line-19"></a><span class='hs-comment'>-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span>
<a name="line-20"></a><span class='hs-comment'>-- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS</span>
<a name="line-21"></a><span class='hs-comment'>-- BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN</span>
<a name="line-22"></a><span class='hs-comment'>-- ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN</span>
<a name="line-23"></a><span class='hs-comment'>-- CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE</span>
<a name="line-24"></a><span class='hs-comment'>-- SOFTWARE.</span>
<a name="line-25"></a>
<a name="line-26"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Repository</span><span class='hs-varop'>.</span><span class='hs-conid'>State</span>
<a name="line-27"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>restrictSubpaths</span><span class='hs-layout'>,</span> <span class='hs-varid'>restrictBoring</span><span class='hs-layout'>,</span> <span class='hs-conid'>TreeFilter</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-28"></a> <span class='hs-comment'>-- * Diffs.</span>
<a name="line-29"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unrecordedChanges</span><span class='hs-layout'>,</span> <span class='hs-varid'>readPending</span>
<a name="line-30"></a> <span class='hs-comment'>-- * Trees.</span>
<a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>readRecorded</span><span class='hs-layout'>,</span> <span class='hs-varid'>readUnrecorded</span><span class='hs-layout'>,</span> <span class='hs-varid'>readRecordedAndPending</span><span class='hs-layout'>,</span> <span class='hs-varid'>readWorking</span>
<a name="line-32"></a> <span class='hs-comment'>-- * Index.</span>
<a name="line-33"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>readIndex</span><span class='hs-layout'>,</span> <span class='hs-varid'>invalidateIndex</span><span class='hs-layout'>,</span> <span class='hs-conid'>UseIndex</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'>ScanKnown</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-34"></a>
<a name="line-35"></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-varid'>filter</span> <span class='hs-layout'>)</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-layout'>(</span> <span class='hs-varid'>when</span> <span class='hs-layout'>)</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</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>
<a name="line-38"></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'>isJust</span> <span class='hs-layout'>)</span>
<a name="line-39"></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'>union</span> <span class='hs-layout'>)</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Regex</span><span class='hs-layout'>(</span> <span class='hs-varid'>matchRegex</span> <span class='hs-layout'>)</span>
<a name="line-41"></a>
<a name="line-42"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Directory</span><span class='hs-layout'>(</span> <span class='hs-varid'>removeFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>doesFileExist</span><span class='hs-layout'>,</span> <span class='hs-varid'>doesDirectoryExist</span><span class='hs-layout'>,</span> <span class='hs-varid'>renameFile</span> <span class='hs-layout'>)</span>
<a name="line-43"></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-layout'>(</span><span class='hs-varop'></></span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-44"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>BS</span>
<a name="line-45"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>BSC</span>
<a name="line-46"></a>
<a name="line-47"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span> <span class='hs-layout'>(</span> <span class='hs-conid'>RepoPatch</span><span class='hs-layout'>,</span> <span class='hs-conid'>PrimOf</span><span class='hs-layout'>,</span> <span class='hs-varid'>sortCoalesceFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromPrim</span><span class='hs-layout'>,</span> <span class='hs-varid'>effect</span> <span class='hs-layout'>)</span>
<a name="line-48"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span><span class='hs-varop'>.</span><span class='hs-conid'>Apply</span> <span class='hs-layout'>(</span> <span class='hs-conid'>ApplyState</span><span class='hs-layout'>,</span> <span class='hs-varid'>applyToTree</span><span class='hs-layout'>,</span> <span class='hs-varid'>effectOnFilePaths</span> <span class='hs-layout'>)</span>
<a name="line-49"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Witnesses</span><span class='hs-varop'>.</span><span class='hs-conid'>Ordered</span> <span class='hs-layout'>(</span> <span class='hs-conid'>FL</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</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'>mapFL_FL</span> <span class='hs-layout'>)</span>
<a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Witnesses</span><span class='hs-varop'>.</span><span class='hs-conid'>Eq</span> <span class='hs-layout'>(</span> <span class='hs-conid'>EqCheck</span><span class='hs-layout'>(</span><span class='hs-conid'>IsEq</span><span class='hs-layout'>,</span> <span class='hs-conid'>NotEq</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Witnesses</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span> <span class='hs-layout'>(</span> <span class='hs-varid'>unsafeCoerceP</span> <span class='hs-layout'>)</span>
<a name="line-52"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Witnesses</span><span class='hs-varop'>.</span><span class='hs-conid'>Sealed</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Sealed</span><span class='hs-layout'>(</span><span class='hs-conid'>Sealed</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>seal</span><span class='hs-layout'>,</span> <span class='hs-varid'>unFreeLeft</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapSeal</span> <span class='hs-layout'>)</span>
<a name="line-53"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Diff</span> <span class='hs-layout'>(</span> <span class='hs-varid'>treeDiff</span> <span class='hs-layout'>)</span>
<a name="line-54"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Flags</span> <span class='hs-layout'>(</span> <span class='hs-conid'>UseIndex</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'>ScanKnown</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-55"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Global</span> <span class='hs-layout'>(</span> <span class='hs-varid'>darcsdir</span> <span class='hs-layout'>)</span>
<a name="line-56"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span> <span class='hs-layout'>(</span> <span class='hs-varid'>filterPaths</span> <span class='hs-layout'>)</span>
<a name="line-57"></a>
<a name="line-58"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Repository</span><span class='hs-varop'>.</span><span class='hs-conid'>InternalTypes</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Repository</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-59"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Repository</span><span class='hs-varop'>.</span><span class='hs-conid'>Format</span><span class='hs-layout'>(</span><span class='hs-varid'>formatHas</span><span class='hs-layout'>,</span> <span class='hs-conid'>RepoProperty</span><span class='hs-layout'>(</span><span class='hs-conid'>NoWorkingDir</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-60"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Repository</span><span class='hs-varop'>.</span><span class='hs-conid'>LowLevel</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>LowLevel</span>
<a name="line-61"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Repository</span><span class='hs-varop'>.</span><span class='hs-conid'>Prefs</span> <span class='hs-layout'>(</span> <span class='hs-varid'>filetypeFunction</span><span class='hs-layout'>,</span> <span class='hs-varid'>boringRegexps</span> <span class='hs-layout'>)</span>
<a name="line-62"></a>
<a name="line-63"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span><span class='hs-varop'>.</span><span class='hs-conid'>FileName</span> <span class='hs-layout'>(</span> <span class='hs-varid'>fn2fp</span> <span class='hs-layout'>)</span>
<a name="line-64"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>RepoPath</span> <span class='hs-layout'>(</span> <span class='hs-conid'>SubPath</span><span class='hs-layout'>,</span> <span class='hs-varid'>sp2fn</span> <span class='hs-layout'>)</span>
<a name="line-65"></a>
<a name="line-66"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Storage</span><span class='hs-varop'>.</span><span class='hs-conid'>Hashed</span><span class='hs-varop'>.</span><span class='hs-conid'>AnchoredPath</span><span class='hs-layout'>(</span> <span class='hs-conid'>AnchoredPath</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>anchorPath</span><span class='hs-layout'>,</span> <span class='hs-varid'>floatPath</span><span class='hs-layout'>,</span> <span class='hs-conid'>Name</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-67"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Storage</span><span class='hs-varop'>.</span><span class='hs-conid'>Hashed</span><span class='hs-varop'>.</span><span class='hs-conid'>Tree</span><span class='hs-layout'>(</span> <span class='hs-conid'>Tree</span><span class='hs-layout'>,</span> <span class='hs-varid'>restrict</span><span class='hs-layout'>,</span> <span class='hs-conid'>FilterTree</span><span class='hs-layout'>,</span> <span class='hs-varid'>expand</span><span class='hs-layout'>,</span> <span class='hs-varid'>filter</span><span class='hs-layout'>,</span> <span class='hs-varid'>emptyTree</span><span class='hs-layout'>,</span> <span class='hs-varid'>overlay</span><span class='hs-layout'>,</span> <span class='hs-varid'>find</span> <span class='hs-layout'>)</span>
<a name="line-68"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Storage</span><span class='hs-varop'>.</span><span class='hs-conid'>Hashed</span><span class='hs-varop'>.</span><span class='hs-conid'>Plain</span><span class='hs-layout'>(</span> <span class='hs-varid'>readPlainTree</span> <span class='hs-layout'>)</span>
<a name="line-69"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Storage</span><span class='hs-varop'>.</span><span class='hs-conid'>Hashed</span><span class='hs-varop'>.</span><span class='hs-conid'>Darcs</span><span class='hs-layout'>(</span> <span class='hs-varid'>darcsTreeHash</span><span class='hs-layout'>,</span> <span class='hs-varid'>readDarcsHashed</span><span class='hs-layout'>,</span> <span class='hs-varid'>decodeDarcsHash</span><span class='hs-layout'>,</span> <span class='hs-varid'>decodeDarcsSize</span> <span class='hs-layout'>)</span>
<a name="line-70"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Storage</span><span class='hs-varop'>.</span><span class='hs-conid'>Hashed</span><span class='hs-varop'>.</span><span class='hs-conid'>Hash</span><span class='hs-layout'>(</span> <span class='hs-conid'>Hash</span><span class='hs-layout'>(</span> <span class='hs-conid'>NoHash</span> <span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-71"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Storage</span><span class='hs-varop'>.</span><span class='hs-conid'>Hashed</span><span class='hs-varop'>.</span><span class='hs-conid'>Index</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>I</span>
<a name="line-72"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Storage</span><span class='hs-varop'>.</span><span class='hs-conid'>Hashed</span><span class='hs-varop'>.</span><span class='hs-conid'>Tree</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Tree</span>
<a name="line-73"></a>
<a name="line-74"></a><span class='hs-cpp'>#include "gadts.h"</span>
<a name="line-75"></a>
<a name="line-76"></a><a name="TreeFilter"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>TreeFilter</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TreeFilter</span> <span class='hs-layout'>{</span> <span class='hs-varid'>applyTreeFilter</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>tr</span> <span class='hs-varop'>.</span> <span class='hs-conid'>FilterTree</span> <span class='hs-varid'>tr</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>tr</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>tr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>}</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="readPendingLL"></a><span class='hs-comment'>-- TODO: We wrap the pending patch inside RepoPatch here, to avoid the</span>
<a name="line-79"></a><span class='hs-comment'>-- requirement to propagate an (ApplyState (PrimOf p) ~ ApplyState p)</span>
<a name="line-80"></a><span class='hs-comment'>-- constraint everywhere. When we have GHC 7.2 as a minimum requirement, we can</span>
<a name="line-81"></a><span class='hs-comment'>-- lift this constraint into RepoPatch superclass context and remove this hack.</span>
<a name="line-82"></a><span class='hs-definition'>readPendingLL</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>RepoPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>ApplyState</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>~</span> <span class='hs-conid'>Tree</span><span class='hs-layout'>)</span>
<a name="line-83"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Repository</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Sealed</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-84"></a><span class='hs-definition'>readPendingLL</span> <span class='hs-varid'>repo</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapSeal</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapFL_FL</span> <span class='hs-varid'>fromPrim</span><span class='hs-layout'>)</span> <span class='hs-varop'>`fmap`</span> <span class='hs-conid'>LowLevel</span><span class='hs-varop'>.</span><span class='hs-varid'>readPending</span> <span class='hs-varid'>repo</span>
<a name="line-85"></a>
<a name="line-86"></a><a name="restrictSubpaths"></a><span class='hs-comment'>-- | From a repository and a list of SubPath's, construct a filter that can be</span>
<a name="line-87"></a><span class='hs-comment'>-- used on a Tree (recorded or unrecorded state) of this repository. This</span>
<a name="line-88"></a><span class='hs-comment'>-- constructed filter will take pending into account, so the subpaths will be</span>
<a name="line-89"></a><span class='hs-comment'>-- translated correctly relative to pending move patches.</span>
<a name="line-90"></a><span class='hs-definition'>restrictSubpaths</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>p</span> <span class='hs-varid'>m</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-conid'>RepoPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>ApplyState</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>~</span> <span class='hs-conid'>Tree</span><span class='hs-layout'>)</span>
<a name="line-91"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Repository</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>SubPath</span><span class='hs-keyglyph'>]</span>
<a name="line-92"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>TreeFilter</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-93"></a><span class='hs-definition'>restrictSubpaths</span> <span class='hs-varid'>repo</span> <span class='hs-varid'>subpaths</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-94"></a> <span class='hs-conid'>Sealed</span> <span class='hs-varid'>pending</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readPendingLL</span> <span class='hs-varid'>repo</span>
<a name="line-95"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>paths</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>fn2fp</span> <span class='hs-varop'>.</span> <span class='hs-varid'>sp2fn</span><span class='hs-layout'>)</span> <span class='hs-varid'>subpaths</span>
<a name="line-96"></a> <span class='hs-varid'>paths'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>paths</span> <span class='hs-varop'>`union`</span> <span class='hs-layout'>(</span><span class='hs-varid'>effectOnFilePaths</span> <span class='hs-varid'>pending</span> <span class='hs-varid'>paths</span><span class='hs-layout'>)</span>
<a name="line-97"></a> <span class='hs-varid'>anchored</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>floatPath</span> <span class='hs-varid'>paths'</span>
<a name="line-98"></a> <span class='hs-varid'>restrictPaths</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilterTree</span> <span class='hs-varid'>tree</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>tree</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>tree</span> <span class='hs-varid'>m</span>
<a name="line-99"></a> <span class='hs-varid'>restrictPaths</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>filterPaths</span> <span class='hs-varid'>anchored</span><span class='hs-layout'>)</span>
<a name="line-100"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>TreeFilter</span> <span class='hs-varid'>restrictPaths</span><span class='hs-layout'>)</span>
<a name="line-101"></a>
<a name="line-102"></a><a name="inDarcsDir"></a><span class='hs-comment'>-- |Is the given path in (or equal to) the _darcs metadata directory?</span>
<a name="line-103"></a><span class='hs-definition'>inDarcsDir</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AnchoredPath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-104"></a><span class='hs-definition'>inDarcsDir</span> <span class='hs-layout'>(</span><span class='hs-conid'>AnchoredPath</span> <span class='hs-layout'>(</span><span class='hs-conid'>Name</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-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-conid'>BSC</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-varid'>darcsdir</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-105"></a><span class='hs-definition'>inDarcsDir</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-106"></a>
<a name="line-107"></a><a name="restrictBoring"></a><span class='hs-comment'>-- | Construct a Tree filter that removes any boring files the Tree might have</span>
<a name="line-108"></a><span class='hs-comment'>-- contained. Additionally, you should (in most cases) pass an (expanded) Tree</span>
<a name="line-109"></a><span class='hs-comment'>-- that corresponds to the recorded content of the repository. This is</span>
<a name="line-110"></a><span class='hs-comment'>-- important in the cases when the repository contains files that would be</span>
<a name="line-111"></a><span class='hs-comment'>-- boring otherwise. (If you pass emptyTree instead, such files will simply be</span>
<a name="line-112"></a><span class='hs-comment'>-- discarded by the filter, which is usually not what you want.)</span>
<a name="line-113"></a><span class='hs-comment'>--</span>
<a name="line-114"></a><span class='hs-comment'>-- This function is most useful when you have a plain Tree corresponding to the</span>
<a name="line-115"></a><span class='hs-comment'>-- full working copy of the repository, including untracked</span>
<a name="line-116"></a><span class='hs-comment'>-- files. Cf. whatsnew, record --look-for-adds. NB. Assumes that our CWD is</span>
<a name="line-117"></a><span class='hs-comment'>-- the repository root.</span>
<a name="line-118"></a><span class='hs-definition'>restrictBoring</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>m</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Tree</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>TreeFilter</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-119"></a><span class='hs-definition'>restrictBoring</span> <span class='hs-varid'>guide</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-120"></a> <span class='hs-varid'>boring</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>boringRegexps</span>
<a name="line-121"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>boring'</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>inDarcsDir</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-122"></a> <span class='hs-varid'>boring'</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>any</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>rx</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>isJust</span> <span class='hs-varop'>$</span> <span class='hs-varid'>matchRegex</span> <span class='hs-varid'>rx</span> <span class='hs-varid'>p'</span><span class='hs-layout'>)</span> <span class='hs-varid'>boring</span>
<a name="line-123"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>p'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>anchorPath</span> <span class='hs-str'>""</span> <span class='hs-varid'>p</span>
<a name="line-124"></a> <span class='hs-varid'>restrictTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilterTree</span> <span class='hs-varid'>t</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>t</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span> <span class='hs-varid'>m</span>
<a name="line-125"></a> <span class='hs-varid'>restrictTree</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filter</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>find</span> <span class='hs-varid'>guide</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span>
<a name="line-126"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>boring'</span> <span class='hs-varid'>p</span>
<a name="line-127"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-128"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>TreeFilter</span> <span class='hs-varid'>restrictTree</span><span class='hs-layout'>)</span>
<a name="line-129"></a>
<a name="line-130"></a><a name="restrictDarcsdir"></a><span class='hs-comment'>-- | Construct a Tree filter that removes any darcs metadata files the</span>
<a name="line-131"></a><span class='hs-comment'>-- Tree might have contained.</span>
<a name="line-132"></a><span class='hs-definition'>restrictDarcsdir</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>m</span> <span class='hs-varop'>.</span> <span class='hs-conid'>TreeFilter</span> <span class='hs-varid'>m</span>
<a name="line-133"></a><span class='hs-definition'>restrictDarcsdir</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TreeFilter</span> <span class='hs-varop'>$</span> <span class='hs-varid'>filter</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>inDarcsDir</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-134"></a>
<a name="line-135"></a><a name="unrecordedChanges"></a><span class='hs-comment'>-- | For a repository and an optional list of paths (when Nothing, take</span>
<a name="line-136"></a><span class='hs-comment'>-- everything) compute a (forward) list of prims (i.e. a patch) going from the</span>
<a name="line-137"></a><span class='hs-comment'>-- recorded state of the repository (pristine) to the unrecorded state of the</span>
<a name="line-138"></a><span class='hs-comment'>-- repository (the working copy + pending). When a list of paths is given, at</span>
<a name="line-139"></a><span class='hs-comment'>-- least the files that live under any of these paths in either recorded or</span>
<a name="line-140"></a><span class='hs-comment'>-- unrecorded will be included in the resulting patch. NB. More patches may be</span>
<a name="line-141"></a><span class='hs-comment'>-- included in this list, eg. the full contents of the pending patch. This is</span>
<a name="line-142"></a><span class='hs-comment'>-- usually not a problem, since selectChanges will properly filter the results</span>
<a name="line-143"></a><span class='hs-comment'>-- anyway.</span>
<a name="line-144"></a><span class='hs-comment'>--</span>
<a name="line-145"></a><span class='hs-comment'>-- This also depends on the options given: with LookForAdds, we will include</span>
<a name="line-146"></a><span class='hs-comment'>-- any non-boring files (i.e. also those that do not exist in the "recorded"</span>
<a name="line-147"></a><span class='hs-comment'>-- state) in the working in the "unrecorded" state, and therefore they will</span>
<a name="line-148"></a><span class='hs-comment'>-- show up in the patches as addfiles.</span>
<a name="line-149"></a><span class='hs-comment'>--</span>
<a name="line-150"></a><span class='hs-comment'>-- The IgnoreTimes option disables index usage completely -- for each file, we</span>
<a name="line-151"></a><span class='hs-comment'>-- read both the unrecorded and the recorded copy and run a diff on them. This</span>
<a name="line-152"></a><span class='hs-comment'>-- is very inefficient, although in extremely rare cases, the index could go</span>
<a name="line-153"></a><span class='hs-comment'>-- out of sync (file is modified, index is updated and file is modified again</span>
<a name="line-154"></a><span class='hs-comment'>-- within a single second).</span>
<a name="line-155"></a><span class='hs-definition'>unrecordedChanges</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-conid'>RepoPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>ApplyState</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>~</span> <span class='hs-conid'>Tree</span><span class='hs-layout'>)</span>
<a name="line-156"></a> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>UseIndex</span><span class='hs-layout'>,</span> <span class='hs-conid'>ScanKnown</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Repository</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-157"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>SubPath</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PrimOf</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>t</span> <span class='hs-varid'>u</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-158"></a><span class='hs-definition'>unrecordedChanges</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>r</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Repo</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>rf</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span>
<a name="line-159"></a> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>formatHas</span> <span class='hs-conid'>NoWorkingDir</span> <span class='hs-varid'>rf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-160"></a> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>workDirLessRepoWitness</span> <span class='hs-varid'>r</span>
<a name="line-161"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>NilFL</span>
<a name="line-162"></a><span class='hs-definition'>unrecordedChanges</span> <span class='hs-layout'>(</span><span class='hs-varid'>useidx</span><span class='hs-layout'>,</span> <span class='hs-varid'>scan</span><span class='hs-layout'>)</span> <span class='hs-varid'>repo</span> <span class='hs-varid'>mbpaths</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-163"></a> <span class='hs-layout'>(</span><span class='hs-varid'>all_current</span><span class='hs-layout'>,</span> <span class='hs-conid'>Sealed</span> <span class='hs-layout'>(</span><span class='hs-varid'>pending</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>t</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readPending</span> <span class='hs-varid'>repo</span>
<a name="line-164"></a>
<a name="line-165"></a> <span class='hs-varid'>relevant</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>TreeFilter</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>restrictSubpaths</span> <span class='hs-varid'>repo</span><span class='hs-layout'>)</span> <span class='hs-varid'>mbpaths</span>
<a name="line-166"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>getIndex</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>I</span><span class='hs-varop'>.</span><span class='hs-varid'>updateIndex</span> <span class='hs-varop'>=<<</span> <span class='hs-layout'>(</span><span class='hs-varid'>applyTreeFilter</span> <span class='hs-varid'>relevant</span> <span class='hs-varop'><$></span> <span class='hs-varid'>readIndex</span> <span class='hs-varid'>repo</span><span class='hs-layout'>)</span>
<a name="line-167"></a> <span class='hs-varid'>current</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>applyTreeFilter</span> <span class='hs-varid'>relevant</span> <span class='hs-varid'>all_current</span>
<a name="line-168"></a>
<a name="line-169"></a> <span class='hs-varid'>index</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getIndex</span>
<a name="line-170"></a> <span class='hs-varid'>working</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>applyTreeFilter</span> <span class='hs-varid'>restrictDarcsdir</span> <span class='hs-varop'><$></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>scan</span> <span class='hs-keyword'>of</span>
<a name="line-171"></a> <span class='hs-conid'>ScanKnown</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>useidx</span> <span class='hs-keyword'>of</span>
<a name="line-172"></a> <span class='hs-conid'>UseIndex</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>getIndex</span>
<a name="line-173"></a> <span class='hs-conid'>IgnoreIndex</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-174"></a> <span class='hs-varid'>guide</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>expand</span> <span class='hs-varid'>current</span>
<a name="line-175"></a> <span class='hs-varid'>applyTreeFilter</span> <span class='hs-varid'>relevant</span> <span class='hs-varop'><$></span> <span class='hs-varid'>restrict</span> <span class='hs-varid'>guide</span> <span class='hs-varop'><$></span> <span class='hs-varid'>readPlainTree</span> <span class='hs-str'>"."</span>
<a name="line-176"></a> <span class='hs-conid'>ScanAll</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-177"></a> <span class='hs-varid'>nonboring</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>restrictBoring</span> <span class='hs-varid'>index</span>
<a name="line-178"></a> <span class='hs-varid'>plain</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>applyTreeFilter</span> <span class='hs-varid'>relevant</span> <span class='hs-varop'><$></span> <span class='hs-varid'>applyTreeFilter</span> <span class='hs-varid'>nonboring</span> <span class='hs-varop'><$></span> <span class='hs-varid'>readPlainTree</span> <span class='hs-str'>"."</span>
<a name="line-179"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>useidx</span> <span class='hs-keyword'>of</span>
<a name="line-180"></a> <span class='hs-conid'>UseIndex</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>plain</span> <span class='hs-varop'>`overlay`</span> <span class='hs-varid'>index</span>
<a name="line-181"></a> <span class='hs-conid'>IgnoreIndex</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>plain</span>
<a name="line-182"></a> <span class='hs-conid'>ScanBoring</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-183"></a> <span class='hs-varid'>plain</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>applyTreeFilter</span> <span class='hs-varid'>relevant</span> <span class='hs-varop'><$></span> <span class='hs-varid'>readPlainTree</span> <span class='hs-str'>"."</span>
<a name="line-184"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>useidx</span> <span class='hs-keyword'>of</span>
<a name="line-185"></a> <span class='hs-conid'>UseIndex</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>plain</span> <span class='hs-varop'>`overlay`</span> <span class='hs-varid'>index</span>
<a name="line-186"></a> <span class='hs-conid'>IgnoreIndex</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>plain</span>
<a name="line-187"></a>
<a name="line-188"></a> <span class='hs-varid'>ft</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>filetypeFunction</span>
<a name="line-189"></a> <span class='hs-conid'>Sealed</span> <span class='hs-layout'>(</span><span class='hs-varid'>diff</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PrimOf</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-varid'>unFreeLeft</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>treeDiff</span> <span class='hs-varid'>ft</span> <span class='hs-varid'>current</span> <span class='hs-varid'>working</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Sealed</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PrimOf</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-190"></a> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>unsafeCoerceP</span> <span class='hs-conid'>IsEq</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>EqCheck</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-varid'>u</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-191"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sortCoalesceFL</span> <span class='hs-layout'>(</span><span class='hs-varid'>effect</span> <span class='hs-varid'>pending</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>diff</span><span class='hs-layout'>)</span>
<a name="line-192"></a>
<a name="line-193"></a><a name="workDirLessRepoWitness"></a><span class='hs-comment'>-- | Witnesses the fact that in the absence of a working directory, we</span>
<a name="line-194"></a><span class='hs-comment'>-- pretend that the working dir updates magically to the tentative state.</span>
<a name="line-195"></a><span class='hs-definition'>workDirLessRepoWitness</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Repository</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-196"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>EqCheck</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-197"></a><span class='hs-definition'>workDirLessRepoWitness</span> <span class='hs-layout'>(</span><span class='hs-conid'>Repo</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>rf</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>formatHas</span> <span class='hs-conid'>NoWorkingDir</span> <span class='hs-varid'>rf</span> <span class='hs-keyglyph'>=</span>
<a name="line-198"></a> <span class='hs-varid'>unsafeCoerceP</span> <span class='hs-conid'>IsEq</span>
<a name="line-199"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NotEq</span>
<a name="line-200"></a>
<a name="line-201"></a><a name="readRecorded"></a><span class='hs-comment'>-- | Obtains a Tree corresponding to the "recorded" state of the repository:</span>
<a name="line-202"></a><span class='hs-comment'>-- this is the same as the pristine cache, which is the same as the result of</span>
<a name="line-203"></a><span class='hs-comment'>-- applying all the repository's patches to an empty directory.</span>
<a name="line-204"></a><span class='hs-comment'>--</span>
<a name="line-205"></a><span class='hs-comment'>-- Handles the plain and hashed pristine cases. Currently does not handle the</span>
<a name="line-206"></a><span class='hs-comment'>-- no-pristine case, as that requires replaying patches. Cf. 'readDarcsHashed'</span>
<a name="line-207"></a><span class='hs-comment'>-- and 'readPlainTree' in hashed-storage that are used to do the actual 'Tree'</span>
<a name="line-208"></a><span class='hs-comment'>-- construction.</span>
<a name="line-209"></a><span class='hs-definition'>readRecorded</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>RepoPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>ApplyState</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>~</span> <span class='hs-conid'>Tree</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Repository</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tree</span> <span class='hs-conid'>IO</span><span class='hs-layout'>)</span>
<a name="line-210"></a><span class='hs-definition'>readRecorded</span> <span class='hs-sel'>_repo</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-211"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>h_inventory</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>darcsdir</span> <span class='hs-varop'></></span> <span class='hs-str'>"hashed_inventory"</span>
<a name="line-212"></a> <span class='hs-varid'>hashed</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>doesFileExist</span> <span class='hs-varid'>h_inventory</span>
<a name="line-213"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>hashed</span>
<a name="line-214"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>inv</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>readFile</span> <span class='hs-varid'>h_inventory</span>
<a name="line-215"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>linesInv</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BSC</span><span class='hs-varop'>.</span><span class='hs-varid'>split</span> <span class='hs-chr'>'\n'</span> <span class='hs-varid'>inv</span>
<a name="line-216"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>linesInv</span> <span class='hs-keyword'>of</span>
<a name="line-217"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>emptyTree</span>
<a name="line-218"></a> <span class='hs-layout'>(</span><span class='hs-varid'>pris_line</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'>do</span>
<a name="line-219"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>hash</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>decodeDarcsHash</span> <span class='hs-varop'>$</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-num'>9</span> <span class='hs-varid'>pris_line</span>
<a name="line-220"></a> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>decodeDarcsSize</span> <span class='hs-varop'>$</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-num'>9</span> <span class='hs-varid'>pris_line</span>
<a name="line-221"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>hash</span> <span class='hs-varop'>==</span> <span class='hs-conid'>NoHash</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Bad pristine root: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>pris_line</span>
<a name="line-222"></a> <span class='hs-varid'>readDarcsHashed</span> <span class='hs-layout'>(</span><span class='hs-varid'>darcsdir</span> <span class='hs-varop'></></span> <span class='hs-str'>"pristine.hashed"</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span><span class='hs-layout'>,</span> <span class='hs-varid'>hash</span><span class='hs-layout'>)</span>
<a name="line-223"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>have_pristine</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>doesDirectoryExist</span> <span class='hs-varop'>$</span> <span class='hs-varid'>darcsdir</span> <span class='hs-varop'></></span> <span class='hs-str'>"pristine"</span>
<a name="line-224"></a> <span class='hs-varid'>have_current</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>doesDirectoryExist</span> <span class='hs-varop'>$</span> <span class='hs-varid'>darcsdir</span> <span class='hs-varop'></></span> <span class='hs-str'>"current"</span>
<a name="line-225"></a> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>have_pristine</span><span class='hs-layout'>,</span> <span class='hs-varid'>have_current</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-226"></a> <span class='hs-layout'>(</span><span class='hs-conid'>True</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>readPlainTree</span> <span class='hs-varop'>$</span> <span class='hs-varid'>darcsdir</span> <span class='hs-varop'></></span> <span class='hs-str'>"pristine"</span>
<a name="line-227"></a> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>readPlainTree</span> <span class='hs-varop'>$</span> <span class='hs-varid'>darcsdir</span> <span class='hs-varop'></></span> <span class='hs-str'>"current"</span>
<a name="line-228"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-str'>"No pristine tree is available!"</span>
<a name="line-229"></a>
<a name="line-230"></a><a name="readUnrecorded"></a><span class='hs-comment'>-- | Obtains a Tree corresponding to the "unrecorded" state of the repository:</span>
<a name="line-231"></a><span class='hs-comment'>-- the working tree plus the "pending" patch. The optional list of paths allows</span>
<a name="line-232"></a><span class='hs-comment'>-- to restrict the query to a subtree.</span>
<a name="line-233"></a><span class='hs-comment'>--</span>
<a name="line-234"></a><span class='hs-comment'>-- Limiting the query may be more efficient, since hashes on the uninteresting</span>
<a name="line-235"></a><span class='hs-comment'>-- parts of the index do not need to go through an up-to-date check (which</span>
<a name="line-236"></a><span class='hs-comment'>-- involves a relatively expensive lstat(2) per file.</span>
<a name="line-237"></a><span class='hs-definition'>readUnrecorded</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>RepoPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>ApplyState</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>~</span> <span class='hs-conid'>Tree</span><span class='hs-layout'>)</span>
<a name="line-238"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Repository</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>SubPath</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tree</span> <span class='hs-conid'>IO</span><span class='hs-layout'>)</span>
<a name="line-239"></a><span class='hs-definition'>readUnrecorded</span> <span class='hs-varid'>repo</span> <span class='hs-varid'>mbpaths</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-240"></a> <span class='hs-varid'>relevant</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>TreeFilter</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>restrictSubpaths</span> <span class='hs-varid'>repo</span><span class='hs-layout'>)</span> <span class='hs-varid'>mbpaths</span>
<a name="line-241"></a> <span class='hs-varid'>readIndex</span> <span class='hs-varid'>repo</span> <span class='hs-varop'>>>=</span> <span class='hs-conid'>I</span><span class='hs-varop'>.</span><span class='hs-varid'>updateIndex</span> <span class='hs-varop'>.</span> <span class='hs-varid'>applyTreeFilter</span> <span class='hs-varid'>relevant</span>
<a name="line-242"></a>
<a name="line-243"></a><a name="readWorking"></a><span class='hs-comment'>-- | Obtains a Tree corresponding to the working copy of the</span>
<a name="line-244"></a><span class='hs-comment'>-- repository. NB. Almost always, using readUnrecorded is the right</span>
<a name="line-245"></a><span class='hs-comment'>-- choice. This function is only useful in not-completely-constructed</span>
<a name="line-246"></a><span class='hs-comment'>-- repositories.</span>
<a name="line-247"></a><span class='hs-definition'>readWorking</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tree</span> <span class='hs-conid'>IO</span><span class='hs-layout'>)</span>
<a name="line-248"></a><span class='hs-definition'>readWorking</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>expand</span> <span class='hs-varop'>=<<</span> <span class='hs-layout'>(</span><span class='hs-varid'>nodarcs</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>readPlainTree</span> <span class='hs-str'>"."</span><span class='hs-layout'>)</span>
<a name="line-249"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>nodarcs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Tree</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-layout'>(</span><span class='hs-conid'>AnchoredPath</span> <span class='hs-layout'>(</span><span class='hs-conid'>Name</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-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>BSC</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-str'>"_darcs"</span><span class='hs-layout'>)</span>
<a name="line-250"></a>
<a name="line-251"></a><a name="readRecordedAndPending"></a><span class='hs-definition'>readRecordedAndPending</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>RepoPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>ApplyState</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>~</span> <span class='hs-conid'>Tree</span><span class='hs-layout'>)</span>
<a name="line-252"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Repository</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tree</span> <span class='hs-conid'>IO</span><span class='hs-layout'>)</span>
<a name="line-253"></a><span class='hs-definition'>readRecordedAndPending</span> <span class='hs-varid'>repo</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fst</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>readPending</span> <span class='hs-varid'>repo</span>
<a name="line-254"></a>
<a name="line-255"></a><a name="readPending"></a><span class='hs-definition'>readPending</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>RepoPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>ApplyState</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>~</span> <span class='hs-conid'>Tree</span><span class='hs-layout'>)</span>
<a name="line-256"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Repository</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tree</span> <span class='hs-conid'>IO</span><span class='hs-layout'>,</span> <span class='hs-conid'>Sealed</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-257"></a><span class='hs-definition'>readPending</span> <span class='hs-varid'>repo</span> <span class='hs-keyglyph'>=</span>
<a name="line-258"></a> <span class='hs-keyword'>do</span> <span class='hs-conid'>Sealed</span> <span class='hs-varid'>pending</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readPendingLL</span> <span class='hs-varid'>repo</span>
<a name="line-259"></a> <span class='hs-varid'>pristine</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readRecorded</span> <span class='hs-varid'>repo</span>
<a name="line-260"></a> <span class='hs-varid'>catch</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>t</span><span class='hs-layout'>,</span> <span class='hs-varid'>seal</span> <span class='hs-varid'>pending</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>applyToTree</span> <span class='hs-varid'>pending</span> <span class='hs-varid'>pristine</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-261"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Yikes, pending has conflicts! "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>err</span>
<a name="line-262"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Stashing the buggy pending as _darcs/patches/pending_buggy"</span>
<a name="line-263"></a> <span class='hs-varid'>renameFile</span> <span class='hs-str'>"_darcs/patches/pending"</span>
<a name="line-264"></a> <span class='hs-str'>"_darcs/patches/pending_buggy"</span>
<a name="line-265"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>pristine</span><span class='hs-layout'>,</span> <span class='hs-varid'>seal</span> <span class='hs-conid'>NilFL</span><span class='hs-layout'>)</span>
<a name="line-266"></a>
<a name="line-267"></a><a name="invalidateIndex"></a><span class='hs-comment'>-- | Mark the existing index as invalid. This has to be called whenever the</span>
<a name="line-268"></a><span class='hs-comment'>-- listing of pristine changes and will cause darcs to update the index next</span>
<a name="line-269"></a><span class='hs-comment'>-- time it tries to read it. (NB. This is about files added and removed from</span>
<a name="line-270"></a><span class='hs-comment'>-- pristine: changes to file content in either pristine or working are handled</span>
<a name="line-271"></a><span class='hs-comment'>-- transparently by the index reading code.)</span>
<a name="line-272"></a><span class='hs-definition'>invalidateIndex</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-273"></a><span class='hs-definition'>invalidateIndex</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-274"></a> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>writeFile</span> <span class='hs-str'>"_darcs/index_invalid"</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span>
<a name="line-275"></a>
<a name="line-276"></a><a name="readIndex"></a><span class='hs-definition'>readIndex</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>RepoPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>ApplyState</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>~</span> <span class='hs-conid'>Tree</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Repository</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>u</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>I</span><span class='hs-varop'>.</span><span class='hs-conid'>Index</span>
<a name="line-277"></a><span class='hs-definition'>readIndex</span> <span class='hs-varid'>repo</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-278"></a> <span class='hs-varid'>invalid</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>doesFileExist</span> <span class='hs-str'>"_darcs/index_invalid"</span>
<a name="line-279"></a> <span class='hs-varid'>exist</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>doesFileExist</span> <span class='hs-str'>"_darcs/index"</span>
<a name="line-280"></a> <span class='hs-varid'>format_valid</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>exist</span>
<a name="line-281"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>I</span><span class='hs-varop'>.</span><span class='hs-varid'>indexFormatValid</span> <span class='hs-str'>"_darcs/index"</span>
<a name="line-282"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-conid'>True</span>
<a name="line-283"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>exist</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>not</span> <span class='hs-varid'>format_valid</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-284"></a><span class='hs-cpp'>#if mingw32_HOST_OS</span>
<a name="line-285"></a> <span class='hs-varid'>renameFile</span> <span class='hs-str'>"_darcs/index"</span> <span class='hs-str'>"_darcs/index.old"</span>
<a name="line-286"></a><span class='hs-cpp'>#else</span>
<a name="line-287"></a> <span class='hs-varid'>removeFile</span> <span class='hs-str'>"_darcs/index"</span>
<a name="line-288"></a><span class='hs-cpp'>#endif</span>
<a name="line-289"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varid'>exist</span> <span class='hs-varop'>||</span> <span class='hs-varid'>invalid</span> <span class='hs-varop'>||</span> <span class='hs-varid'>not</span> <span class='hs-varid'>format_valid</span><span class='hs-layout'>)</span>
<a name="line-290"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>pris</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readRecordedAndPending</span> <span class='hs-varid'>repo</span>
<a name="line-291"></a> <span class='hs-varid'>idx</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>I</span><span class='hs-varop'>.</span><span class='hs-varid'>updateIndexFrom</span> <span class='hs-str'>"_darcs/index"</span> <span class='hs-varid'>darcsTreeHash</span> <span class='hs-varid'>pris</span>
<a name="line-292"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>invalid</span> <span class='hs-varop'>$</span> <span class='hs-varid'>removeFile</span> <span class='hs-str'>"_darcs/index_invalid"</span>
<a name="line-293"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>idx</span>
<a name="line-294"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>I</span><span class='hs-varop'>.</span><span class='hs-varid'>readIndex</span> <span class='hs-str'>"_darcs/index"</span> <span class='hs-varid'>darcsTreeHash</span>
</pre></body>
</html>
