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<title>src/Darcs/Global.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-- Copyright (C) 2005 Tomasz Zielonka</span>
<a name="line-2"></a><span class='hs-comment'>--</span>
<a name="line-3"></a><span class='hs-comment'>-- This program is free software; you can redistribute it and/or modify</span>
<a name="line-4"></a><span class='hs-comment'>-- it under the terms of the GNU General Public License as published by</span>
<a name="line-5"></a><span class='hs-comment'>-- the Free Software Foundation; either version 2, or (at your option)</span>
<a name="line-6"></a><span class='hs-comment'>-- any later version.</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- This program is distributed in the hope that it will be useful,</span>
<a name="line-9"></a><span class='hs-comment'>-- but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="line-10"></a><span class='hs-comment'>-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="line-11"></a><span class='hs-comment'>-- GNU General Public License for more details.</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- You should have received a copy of the GNU General Public License</span>
<a name="line-14"></a><span class='hs-comment'>-- along with this program; see the file COPYING. If not, write to</span>
<a name="line-15"></a><span class='hs-comment'>-- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,</span>
<a name="line-16"></a><span class='hs-comment'>-- Boston, MA 02110-1301, USA.</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-19"></a>
<a name="line-20"></a><span class='hs-comment'>-- |</span>
<a name="line-21"></a><span class='hs-comment'>-- Module : Darcs.Global</span>
<a name="line-22"></a><span class='hs-comment'>-- Copyright : 2005 Tomasz Zielonka</span>
<a name="line-23"></a><span class='hs-comment'>-- License : GPL</span>
<a name="line-24"></a><span class='hs-comment'>-- Maintainer : darcs-devel@darcs.net</span>
<a name="line-25"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-26"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-27"></a><span class='hs-comment'>--</span>
<a name="line-28"></a><span class='hs-comment'>-- This was originally Tomasz Zielonka's AtExit module, slightly generalised</span>
<a name="line-29"></a><span class='hs-comment'>-- to include global variables. Here, we attempt to cover broad, global</span>
<a name="line-30"></a><span class='hs-comment'>-- features, such as exit handlers. These features slightly break the Haskellian</span>
<a name="line-31"></a><span class='hs-comment'>-- purity of darcs, in favour of programming convenience.</span>
<a name="line-32"></a>
<a name="line-33"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Global</span>
<a name="line-34"></a> <span class='hs-layout'>(</span>
<a name="line-35"></a> <span class='hs-varid'>atexit</span>
<a name="line-36"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>withAtexit</span>
<a name="line-37"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>SshSettings</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-38"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>defaultSsh</span>
<a name="line-39"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>timingsMode</span>
<a name="line-40"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>setTimingsMode</span>
<a name="line-41"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>whenDebugMode</span>
<a name="line-42"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>withDebugMode</span>
<a name="line-43"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>setDebugMode</span>
<a name="line-44"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>debugMessage</span>
<a name="line-45"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>debugFail</span>
<a name="line-46"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>putTiming</span>
<a name="line-47"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>addCRCWarning</span>
<a name="line-48"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>getCRCWarnings</span>
<a name="line-49"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>resetCRCWarnings</span>
<a name="line-50"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>addBadSource</span>
<a name="line-51"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>getBadSourcesList</span>
<a name="line-52"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>isBadSource</span>
<a name="line-53"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>darcsdir</span>
<a name="line-54"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>isReachableSource</span>
<a name="line-55"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>addReachableSource</span>
<a name="line-56"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>windows</span>
<a name="line-57"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-58"></a>
<a name="line-59"></a>
<a name="line-60"></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> <span class='hs-layout'>(</span><span class='hs-varop'><*></span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-61"></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-62"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Concurrent</span><span class='hs-varop'>.</span><span class='hs-conid'>MVar</span>
<a name="line-63"></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-varop'>.</span><span class='hs-conid'>Extensible</span> <span class='hs-layout'>(</span> <span class='hs-varid'>bracket_</span><span class='hs-layout'>,</span> <span class='hs-varid'>catch</span><span class='hs-layout'>,</span> <span class='hs-varid'>catchJust</span><span class='hs-layout'>,</span> <span class='hs-conid'>SomeException</span>
<a name="line-64"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>block</span><span class='hs-layout'>,</span> <span class='hs-varid'>unblock</span>
<a name="line-65"></a> <span class='hs-layout'>)</span>
<a name="line-66"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IORef</span> <span class='hs-layout'>(</span> <span class='hs-conid'>IORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>newIORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>readIORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>writeIORef</span> <span class='hs-layout'>)</span>
<a name="line-67"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IORef</span> <span class='hs-layout'>(</span> <span class='hs-varid'>modifyIORef</span> <span class='hs-layout'>)</span>
<a name="line-68"></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'>isPrefixOf</span> <span class='hs-layout'>)</span>
<a name="line-69"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Info</span> <span class='hs-layout'>(</span> <span class='hs-varid'>os</span> <span class='hs-layout'>)</span>
<a name="line-70"></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'>Unsafe</span> <span class='hs-layout'>(</span><span class='hs-varid'>unsafePerformIO</span><span class='hs-layout'>)</span>
<a name="line-71"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-varid'>hPutStrLn</span><span class='hs-layout'>,</span> <span class='hs-varid'>hPutStr</span><span class='hs-layout'>,</span> <span class='hs-varid'>stderr</span><span class='hs-layout'>)</span>
<a name="line-72"></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'>Error</span> <span class='hs-layout'>(</span> <span class='hs-varid'>ioeGetErrorType</span><span class='hs-layout'>,</span> <span class='hs-varid'>isDoesNotExistErrorType</span> <span class='hs-layout'>)</span>
<a name="line-73"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Process</span> <span class='hs-layout'>(</span> <span class='hs-varid'>readProcessWithExitCode</span> <span class='hs-layout'>)</span>
<a name="line-74"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Time</span> <span class='hs-layout'>(</span> <span class='hs-varid'>calendarTimeToString</span><span class='hs-layout'>,</span> <span class='hs-varid'>toCalendarTime</span><span class='hs-layout'>,</span> <span class='hs-varid'>getClockTime</span> <span class='hs-layout'>)</span>
<a name="line-75"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Environment</span> <span class='hs-layout'>(</span> <span class='hs-varid'>getEnv</span> <span class='hs-layout'>)</span>
<a name="line-76"></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'>catch</span><span class='hs-layout'>)</span>
<a name="line-77"></a>
<a name="line-78"></a>
<a name="line-79"></a><a name="windows"></a><span class='hs-definition'>windows</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span>
<a name="line-80"></a><span class='hs-definition'>windows</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"mingw"</span> <span class='hs-varop'>`isPrefixOf`</span> <span class='hs-varid'>os</span>
<a name="line-81"></a>
<a name="line-82"></a>
<a name="line-83"></a><a name="atexitActions"></a><span class='hs-definition'>atexitActions</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MVar</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-84"></a><span class='hs-definition'>atexitActions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-layout'>(</span><span class='hs-varid'>newMVar</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-85"></a><span class='hs-comment'>{-# NOINLINE atexitActions #-}</span>
<a name="line-86"></a>
<a name="line-87"></a>
<a name="line-88"></a><a name="atexit"></a><span class='hs-comment'>-- | Registers an IO action to run just before darcs exits. Useful for removing</span>
<a name="line-89"></a><span class='hs-comment'>-- temporary files and directories, for example. Referenced in Issue1914.</span>
<a name="line-90"></a><span class='hs-definition'>atexit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-91"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-92"></a><span class='hs-definition'>atexit</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span>
<a name="line-93"></a> <span class='hs-varid'>modifyMVar_</span> <span class='hs-varid'>atexitActions</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>ml</span> <span class='hs-keyglyph'>-></span>
<a name="line-94"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>ml</span> <span class='hs-keyword'>of</span>
<a name="line-95"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>-></span>
<a name="line-96"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>action</span> <span class='hs-conop'>:</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-97"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-98"></a> <span class='hs-varid'>hPutStrLn</span> <span class='hs-varid'>stderr</span> <span class='hs-str'>"It's too late to use atexit"</span>
<a name="line-99"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-100"></a>
<a name="line-101"></a>
<a name="line-102"></a><a name="withAtexit"></a><span class='hs-definition'>withAtexit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-103"></a><span class='hs-definition'>withAtexit</span> <span class='hs-varid'>prog</span> <span class='hs-keyglyph'>=</span>
<a name="line-104"></a> <span class='hs-varid'>bracket_</span>
<a name="line-105"></a> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-106"></a> <span class='hs-varid'>exit</span>
<a name="line-107"></a> <span class='hs-varid'>prog</span>
<a name="line-108"></a> <span class='hs-keyword'>where</span>
<a name="line-109"></a> <span class='hs-varid'>exit</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>block</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-110"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>actions</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>swapMVar</span> <span class='hs-varid'>atexitActions</span> <span class='hs-conid'>Nothing</span>
<a name="line-111"></a> <span class='hs-comment'>-- from now on atexit will not register new actions</span>
<a name="line-112"></a> <span class='hs-varid'>mapM_</span> <span class='hs-varid'>runAction</span> <span class='hs-varid'>actions</span>
<a name="line-113"></a> <span class='hs-varid'>runAction</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span>
<a name="line-114"></a> <span class='hs-varid'>catch</span> <span class='hs-layout'>(</span><span class='hs-varid'>unblock</span> <span class='hs-varid'>action</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>exn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SomeException</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-115"></a> <span class='hs-varid'>hPutStrLn</span> <span class='hs-varid'>stderr</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Exception thrown by an atexit registered action:"</span>
<a name="line-116"></a> <span class='hs-varid'>hPutStrLn</span> <span class='hs-varid'>stderr</span> <span class='hs-varop'>$</span> <span class='hs-varid'>show</span> <span class='hs-varid'>exn</span>
<a name="line-117"></a>
<a name="line-118"></a>
<a name="line-119"></a><span class='hs-comment'>-- Write-once-read-many global variables make it easier to implement flags, such</span>
<a name="line-120"></a><span class='hs-comment'>-- as --no-ssh-cm. Using global variables reduces the number of parameters that</span>
<a name="line-121"></a><span class='hs-comment'>-- we have to pass around, but it is rather unsafe and should be used sparingly.</span>
<a name="line-122"></a>
<a name="line-123"></a>
<a name="line-124"></a><span class='hs-sel'>_debugMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IORef</span> <span class='hs-conid'>Bool</span>
<a name="line-125"></a><span class='hs-sel'>_debugMode</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newIORef</span> <span class='hs-conid'>False</span>
<a name="line-126"></a><span class='hs-comment'>{-# NOINLINE _debugMode #-}</span>
<a name="line-127"></a>
<a name="line-128"></a>
<a name="line-129"></a><a name="setDebugMode"></a><span class='hs-definition'>setDebugMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-130"></a><span class='hs-definition'>setDebugMode</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>writeIORef</span> <span class='hs-sel'>_debugMode</span> <span class='hs-conid'>True</span>
<a name="line-131"></a>
<a name="line-132"></a>
<a name="line-133"></a><a name="whenDebugMode"></a><span class='hs-definition'>whenDebugMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-134"></a><span class='hs-definition'>whenDebugMode</span> <span class='hs-varid'>j</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-sel'>_debugMode</span>
<a name="line-135"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>b</span> <span class='hs-varid'>j</span>
<a name="line-136"></a>
<a name="line-137"></a>
<a name="line-138"></a><a name="withDebugMode"></a><span class='hs-definition'>withDebugMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-139"></a><span class='hs-definition'>withDebugMode</span> <span class='hs-varid'>j</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readIORef</span> <span class='hs-sel'>_debugMode</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>j</span>
<a name="line-140"></a>
<a name="line-141"></a>
<a name="line-142"></a><a name="debugMessage"></a><span class='hs-definition'>debugMessage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-143"></a><span class='hs-definition'>debugMessage</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>whenDebugMode</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>putTiming</span><span class='hs-layout'>;</span> <span class='hs-varid'>hPutStrLn</span> <span class='hs-varid'>stderr</span> <span class='hs-varid'>m</span>
<a name="line-144"></a>
<a name="line-145"></a>
<a name="line-146"></a><a name="debugFail"></a><span class='hs-definition'>debugFail</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-147"></a><span class='hs-definition'>debugFail</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debugMessage</span> <span class='hs-varid'>m</span> <span class='hs-varop'>>></span> <span class='hs-varid'>fail</span> <span class='hs-varid'>m</span>
<a name="line-148"></a>
<a name="line-149"></a>
<a name="line-150"></a><a name="putTiming"></a><span class='hs-definition'>putTiming</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-151"></a><span class='hs-definition'>putTiming</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>when</span> <span class='hs-varid'>timingsMode</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-152"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getClockTime</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>toCalendarTime</span>
<a name="line-153"></a> <span class='hs-varid'>hPutStr</span> <span class='hs-varid'>stderr</span> <span class='hs-layout'>(</span><span class='hs-varid'>calendarTimeToString</span> <span class='hs-varid'>t</span><span class='hs-varop'>++</span><span class='hs-str'>": "</span><span class='hs-layout'>)</span>
<a name="line-154"></a>
<a name="line-155"></a>
<a name="line-156"></a><span class='hs-sel'>_timingsMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IORef</span> <span class='hs-conid'>Bool</span>
<a name="line-157"></a><span class='hs-sel'>_timingsMode</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newIORef</span> <span class='hs-conid'>False</span>
<a name="line-158"></a><span class='hs-comment'>{-# NOINLINE _timingsMode #-}</span>
<a name="line-159"></a>
<a name="line-160"></a>
<a name="line-161"></a><a name="setTimingsMode"></a><span class='hs-definition'>setTimingsMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-162"></a><span class='hs-definition'>setTimingsMode</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>writeIORef</span> <span class='hs-sel'>_timingsMode</span> <span class='hs-conid'>True</span>
<a name="line-163"></a>
<a name="line-164"></a>
<a name="line-165"></a><a name="timingsMode"></a><span class='hs-definition'>timingsMode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span>
<a name="line-166"></a><span class='hs-definition'>timingsMode</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>readIORef</span> <span class='hs-sel'>_timingsMode</span>
<a name="line-167"></a><span class='hs-comment'>{-# NOINLINE timingsMode #-}</span>
<a name="line-168"></a>
<a name="line-169"></a>
<a name="line-170"></a><a name="SshSettings"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>SshSettings</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>SshSettings</span>
<a name="line-171"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>ssh</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-172"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>scp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-173"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>sftp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-174"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>)</span>
<a name="line-175"></a>
<a name="line-176"></a>
<a name="line-177"></a><span class='hs-sel'>_defaultSsh</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IORef</span> <span class='hs-conid'>SshSettings</span>
<a name="line-178"></a><span class='hs-sel'>_defaultSsh</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newIORef</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>detectSsh</span>
<a name="line-179"></a>
<a name="line-180"></a>
<a name="line-181"></a><a name="detectSsh"></a><span class='hs-comment'>-- | Expected properties:</span>
<a name="line-182"></a><span class='hs-comment'>--</span>
<a name="line-183"></a><span class='hs-comment'>-- * only ever runs once in the lifetime of the program</span>
<a name="line-184"></a><span class='hs-comment'>-- * environment variables override all</span>
<a name="line-185"></a><span class='hs-comment'>-- * tries Putty first on Windows</span>
<a name="line-186"></a><span class='hs-comment'>-- * falls back to plain old ssh</span>
<a name="line-187"></a><span class='hs-definition'>detectSsh</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>SshSettings</span>
<a name="line-188"></a><span class='hs-definition'>detectSsh</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-189"></a> <span class='hs-varid'>whenDebugMode</span> <span class='hs-layout'>(</span><span class='hs-varid'>putStrLn</span> <span class='hs-str'>"Detecting SSH settings"</span><span class='hs-layout'>)</span>
<a name="line-190"></a> <span class='hs-varid'>vanilla</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>windows</span>
<a name="line-191"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span>
<a name="line-192"></a> <span class='hs-varid'>plinkStr</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-varid'>snd3</span> <span class='hs-varop'><$></span> <span class='hs-varid'>readProcessWithExitCode</span> <span class='hs-str'>"plink"</span> <span class='hs-conid'>[]</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span>
<a name="line-193"></a> <span class='hs-varop'>`catch`</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>e</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SomeException</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-194"></a> <span class='hs-varid'>whenDebugMode</span> <span class='hs-varop'>$</span> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span>
<a name="line-195"></a> <span class='hs-str'>"SSH settings (plink): "</span> <span class='hs-varop'>++</span>
<a name="line-196"></a> <span class='hs-layout'>(</span><span class='hs-varid'>concat</span> <span class='hs-varop'>.</span> <span class='hs-varid'>take</span> <span class='hs-num'>1</span> <span class='hs-varop'>.</span> <span class='hs-varid'>lines</span> <span class='hs-varop'>$</span> <span class='hs-varid'>plinkStr</span><span class='hs-layout'>)</span>
<a name="line-197"></a> <span class='hs-keyword'>if</span> <span class='hs-str'>"PuTTY"</span> <span class='hs-varop'>`isPrefixOf`</span> <span class='hs-varid'>plinkStr</span>
<a name="line-198"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>SshSettings</span> <span class='hs-str'>"plink"</span> <span class='hs-str'>"pscp -q"</span> <span class='hs-str'>"psftp"</span><span class='hs-layout'>)</span>
<a name="line-199"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>rawVanilla</span>
<a name="line-200"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>rawVanilla</span>
<a name="line-201"></a> <span class='hs-varid'>settings</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>SshSettings</span> <span class='hs-varop'><$></span> <span class='hs-varid'>fromEnv</span> <span class='hs-layout'>(</span><span class='hs-varid'>ssh</span> <span class='hs-varid'>vanilla</span><span class='hs-layout'>)</span> <span class='hs-str'>"DARCS_SSH"</span>
<a name="line-202"></a> <span class='hs-varop'><*></span> <span class='hs-varid'>fromEnv</span> <span class='hs-layout'>(</span><span class='hs-varid'>scp</span> <span class='hs-varid'>vanilla</span><span class='hs-layout'>)</span> <span class='hs-str'>"DARCS_SCP"</span>
<a name="line-203"></a> <span class='hs-varop'><*></span> <span class='hs-varid'>fromEnv</span> <span class='hs-layout'>(</span><span class='hs-varid'>sftp</span> <span class='hs-varid'>vanilla</span><span class='hs-layout'>)</span> <span class='hs-str'>"DARCS_SFTP"</span>
<a name="line-204"></a> <span class='hs-varid'>whenDebugMode</span> <span class='hs-layout'>(</span><span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-str'>"SSH settings: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>settings</span><span class='hs-layout'>)</span>
<a name="line-205"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>settings</span>
<a name="line-206"></a> <span class='hs-keyword'>where</span>
<a name="line-207"></a> <span class='hs-varid'>snd3</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>x</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'>x</span>
<a name="line-208"></a> <span class='hs-varid'>rawVanilla</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>SshSettings</span> <span class='hs-str'>"ssh"</span> <span class='hs-str'>"scp -q"</span> <span class='hs-str'>"sftp"</span>
<a name="line-209"></a> <span class='hs-varid'>fromEnv</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span>
<a name="line-210"></a> <span class='hs-varid'>fromEnv</span> <span class='hs-varid'>d</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>catchJust</span> <span class='hs-varid'>notFound</span>
<a name="line-211"></a> <span class='hs-layout'>(</span><span class='hs-varid'>getEnv</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span>
<a name="line-212"></a> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-213"></a> <span class='hs-varid'>notFound</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isDoesNotExistErrorType</span> <span class='hs-layout'>(</span><span class='hs-varid'>ioeGetErrorType</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-214"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>()</span>
<a name="line-215"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-216"></a>
<a name="line-217"></a>
<a name="line-218"></a><a name="defaultSsh"></a><span class='hs-definition'>defaultSsh</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SshSettings</span>
<a name="line-219"></a><span class='hs-definition'>defaultSsh</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>readIORef</span> <span class='hs-sel'>_defaultSsh</span>
<a name="line-220"></a>
<a name="line-221"></a>
<a name="line-222"></a><a name="CRCWarningList"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>CRCWarningList</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>FilePath</span><span class='hs-keyglyph'>]</span>
<a name="line-223"></a><span class='hs-sel'>_crcWarningList</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IORef</span> <span class='hs-conid'>CRCWarningList</span>
<a name="line-224"></a><span class='hs-sel'>_crcWarningList</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newIORef</span> <span class='hs-conid'>[]</span>
<a name="line-225"></a><span class='hs-comment'>{-# NOINLINE _crcWarningList #-}</span>
<a name="line-226"></a>
<a name="line-227"></a>
<a name="line-228"></a><a name="addCRCWarning"></a><span class='hs-definition'>addCRCWarning</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-229"></a><span class='hs-definition'>addCRCWarning</span> <span class='hs-varid'>fp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>modifyIORef</span> <span class='hs-sel'>_crcWarningList</span> <span class='hs-layout'>(</span><span class='hs-varid'>fp</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span>
<a name="line-230"></a>
<a name="line-231"></a>
<a name="line-232"></a><a name="getCRCWarnings"></a><span class='hs-definition'>getCRCWarnings</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-233"></a><span class='hs-definition'>getCRCWarnings</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readIORef</span> <span class='hs-sel'>_crcWarningList</span>
<a name="line-234"></a>
<a name="line-235"></a>
<a name="line-236"></a><a name="resetCRCWarnings"></a><span class='hs-definition'>resetCRCWarnings</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-237"></a><span class='hs-definition'>resetCRCWarnings</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>writeIORef</span> <span class='hs-sel'>_crcWarningList</span> <span class='hs-conid'>[]</span>
<a name="line-238"></a>
<a name="line-239"></a>
<a name="line-240"></a><span class='hs-sel'>_badSourcesList</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IORef</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-241"></a><span class='hs-sel'>_badSourcesList</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newIORef</span> <span class='hs-conid'>[]</span>
<a name="line-242"></a><span class='hs-comment'>{- NOINLINE _badSourcesList -}</span>
<a name="line-243"></a>
<a name="line-244"></a>
<a name="line-245"></a><a name="addBadSource"></a><span class='hs-definition'>addBadSource</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-246"></a><span class='hs-definition'>addBadSource</span> <span class='hs-varid'>cache</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>modifyIORef</span> <span class='hs-sel'>_badSourcesList</span> <span class='hs-layout'>(</span><span class='hs-varid'>cache</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span>
<a name="line-247"></a>
<a name="line-248"></a>
<a name="line-249"></a><a name="getBadSourcesList"></a><span class='hs-definition'>getBadSourcesList</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-250"></a><span class='hs-definition'>getBadSourcesList</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readIORef</span> <span class='hs-sel'>_badSourcesList</span>
<a name="line-251"></a>
<a name="line-252"></a>
<a name="line-253"></a><a name="isBadSource"></a><span class='hs-definition'>isBadSource</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span>
<a name="line-254"></a><span class='hs-definition'>isBadSource</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-255"></a> <span class='hs-varid'>badSources</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getBadSourcesList</span>
<a name="line-256"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varop'>`elem`</span> <span class='hs-varid'>badSources</span><span class='hs-layout'>)</span>
<a name="line-257"></a>
<a name="line-258"></a>
<a name="line-259"></a><span class='hs-sel'>_reachableSourcesList</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IORef</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-260"></a><span class='hs-sel'>_reachableSourcesList</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newIORef</span> <span class='hs-conid'>[]</span>
<a name="line-261"></a><span class='hs-comment'>{- NOINLINE _reachableSourcesList -}</span>
<a name="line-262"></a>
<a name="line-263"></a>
<a name="line-264"></a><a name="addReachableSource"></a><span class='hs-definition'>addReachableSource</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-265"></a><span class='hs-definition'>addReachableSource</span> <span class='hs-varid'>src</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>modifyIORef</span> <span class='hs-sel'>_reachableSourcesList</span> <span class='hs-layout'>(</span><span class='hs-varid'>src</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span>
<a name="line-266"></a>
<a name="line-267"></a>
<a name="line-268"></a><a name="getReachableSources"></a><span class='hs-definition'>getReachableSources</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-269"></a><span class='hs-definition'>getReachableSources</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readIORef</span> <span class='hs-sel'>_reachableSourcesList</span>
<a name="line-270"></a>
<a name="line-271"></a>
<a name="line-272"></a><a name="isReachableSource"></a><span class='hs-definition'>isReachableSource</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span>
<a name="line-273"></a><span class='hs-definition'>isReachableSource</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-274"></a> <span class='hs-varid'>reachableSources</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getReachableSources</span>
<a name="line-275"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varop'>`elem`</span> <span class='hs-varid'>reachableSources</span><span class='hs-layout'>)</span>
<a name="line-276"></a>
<a name="line-277"></a>
<a name="line-278"></a><a name="darcsdir"></a><span class='hs-definition'>darcsdir</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-279"></a><span class='hs-definition'>darcsdir</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"_darcs"</span>
</pre></body>
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