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<title>src/Darcs/Commands/Tag.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-- Copyright (C) 2003-2004 David Roundy</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-keyword'>module</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Commands</span><span class='hs-varop'>.</span><span class='hs-conid'>Tag</span> <span class='hs-layout'>(</span> <span class='hs-varid'>tag</span> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-19"></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>
<a name="line-20"></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-21"></a>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Commands</span> <span class='hs-layout'>(</span> <span class='hs-conid'>DarcsCommand</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'>nodefaults</span> <span class='hs-layout'>)</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Arguments</span> <span class='hs-layout'>(</span> <span class='hs-varid'>nocompress</span><span class='hs-layout'>,</span> <span class='hs-varid'>umaskOption</span><span class='hs-layout'>,</span> <span class='hs-varid'>patchnameOption</span><span class='hs-layout'>,</span> <span class='hs-varid'>author</span><span class='hs-layout'>,</span>
<a name="line-24"></a> <span class='hs-varid'>pipeInteractive</span><span class='hs-layout'>,</span> <span class='hs-varid'>askLongComment</span><span class='hs-layout'>,</span>
<a name="line-25"></a> <span class='hs-varid'>workingRepoDir</span><span class='hs-layout'>,</span> <span class='hs-varid'>getAuthor</span> <span class='hs-layout'>)</span>
<a name="line-26"></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'>PatchInfoAnd</span> <span class='hs-layout'>(</span> <span class='hs-varid'>n2pia</span> <span class='hs-layout'>)</span>
<a name="line-27"></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-layout'>(</span> <span class='hs-varid'>amInHashedRepository</span><span class='hs-layout'>,</span> <span class='hs-varid'>withRepoLock</span><span class='hs-layout'>,</span> <span class='hs-conid'>Repository</span><span class='hs-layout'>,</span> <span class='hs-conid'>RepoJob</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'>readRepo</span><span class='hs-layout'>,</span>
<a name="line-28"></a> <span class='hs-varid'>tentativelyAddPatch</span><span class='hs-layout'>,</span> <span class='hs-varid'>finalizeRepositoryChanges</span><span class='hs-layout'>,</span>
<a name="line-29"></a> <span class='hs-layout'>)</span>
<a name="line-30"></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-varid'>infopatch</span><span class='hs-layout'>,</span> <span class='hs-varid'>adddeps</span><span class='hs-layout'>,</span> <span class='hs-conid'>Patchy</span><span class='hs-layout'>,</span> <span class='hs-conid'>PrimPatch</span><span class='hs-layout'>,</span> <span class='hs-conid'>PrimOf</span> <span class='hs-layout'>)</span>
<a name="line-31"></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'>Info</span> <span class='hs-layout'>(</span> <span class='hs-varid'>patchinfo</span> <span class='hs-layout'>)</span>
<a name="line-32"></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'>Depends</span> <span class='hs-layout'>(</span> <span class='hs-varid'>getTagsRight</span> <span class='hs-layout'>)</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Commands</span><span class='hs-varop'>.</span><span class='hs-conid'>Record</span> <span class='hs-layout'>(</span> <span class='hs-varid'>getDate</span><span class='hs-layout'>,</span> <span class='hs-varid'>getLog</span> <span class='hs-layout'>)</span>
<a name="line-34"></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>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Lock</span> <span class='hs-layout'>(</span> <span class='hs-varid'>worldReadableTemp</span> <span class='hs-layout'>)</span>
<a name="line-36"></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'>DarcsFlag</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'>compression</span> <span class='hs-layout'>)</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span> <span class='hs-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-38"></a>
<a name="line-39"></a><span class='hs-cpp'>#include "gadts.h"</span>
<a name="line-40"></a>
<a name="line-41"></a><a name="tagDescription"></a><span class='hs-definition'>tagDescription</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-42"></a><span class='hs-definition'>tagDescription</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"Name the current repository state for future reference."</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="tagHelp"></a><span class='hs-definition'>tagHelp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-45"></a><span class='hs-definition'>tagHelp</span> <span class='hs-keyglyph'>=</span>
<a name="line-46"></a> <span class='hs-str'>"The `darcs tag' command names the current repository state, so that it\n"</span> <span class='hs-varop'>++</span>
<a name="line-47"></a> <span class='hs-str'>"can easily be referred to later. Every `important' state should be\n"</span> <span class='hs-varop'>++</span>
<a name="line-48"></a> <span class='hs-str'>"tagged; in particular it is good practice to tag each stable release\n"</span> <span class='hs-varop'>++</span>
<a name="line-49"></a> <span class='hs-str'>"with a number or codename. Advice on release numbering can be found\n"</span> <span class='hs-varop'>++</span>
<a name="line-50"></a> <span class='hs-str'>"at http://producingoss.com/en/development-cycle.html.\n"</span> <span class='hs-varop'>++</span>
<a name="line-51"></a> <span class='hs-str'>"\n"</span> <span class='hs-varop'>++</span>
<a name="line-52"></a> <span class='hs-str'>"To reproduce the state of a repository `R' as at tag `t', use the\n"</span> <span class='hs-varop'>++</span>
<a name="line-53"></a> <span class='hs-str'>"command `darcs get --tag t R'. The command `darcs show tags' lists\n"</span> <span class='hs-varop'>++</span>
<a name="line-54"></a> <span class='hs-str'>"all tags in the current repository.\n"</span> <span class='hs-varop'>++</span>
<a name="line-55"></a> <span class='hs-str'>"\n"</span> <span class='hs-varop'>++</span>
<a name="line-56"></a> <span class='hs-str'>"Tagging also provides significant performance benefits: when Darcs\n"</span> <span class='hs-varop'>++</span>
<a name="line-57"></a> <span class='hs-str'>"reaches a shared tag that depends on all antecedent patches, it can\n"</span> <span class='hs-varop'>++</span>
<a name="line-58"></a> <span class='hs-str'>"simply stop processing.\n"</span> <span class='hs-varop'>++</span>
<a name="line-59"></a> <span class='hs-str'>"\n"</span> <span class='hs-varop'>++</span>
<a name="line-60"></a> <span class='hs-str'>"Like normal patches, a tag has a name, an author, a timestamp and an\n"</span> <span class='hs-varop'>++</span>
<a name="line-61"></a> <span class='hs-str'>"optional long description, but it does not change the working tree.\n"</span> <span class='hs-varop'>++</span>
<a name="line-62"></a> <span class='hs-str'>"A tag can have any name, but it is generally best to pick a naming\n"</span> <span class='hs-varop'>++</span>
<a name="line-63"></a> <span class='hs-str'>"scheme and stick to it.\n"</span> <span class='hs-varop'>++</span>
<a name="line-64"></a> <span class='hs-str'>"\n"</span> <span class='hs-varop'>++</span>
<a name="line-65"></a> <span class='hs-str'>"The `darcs tag' command accepts the --pipe option, which behaves as\n"</span> <span class='hs-varop'>++</span>
<a name="line-66"></a> <span class='hs-str'>"described in `darcs record'.\n"</span>
<a name="line-67"></a>
<a name="line-68"></a><a name="tag"></a><span class='hs-definition'>tag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DarcsCommand</span>
<a name="line-69"></a><span class='hs-definition'>tag</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DarcsCommand</span> <span class='hs-layout'>{</span><span class='hs-varid'>commandProgramName</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"darcs"</span><span class='hs-layout'>,</span>
<a name="line-70"></a> <span class='hs-varid'>commandName</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"tag"</span><span class='hs-layout'>,</span>
<a name="line-71"></a> <span class='hs-varid'>commandHelp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tagHelp</span><span class='hs-layout'>,</span>
<a name="line-72"></a> <span class='hs-varid'>commandDescription</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tagDescription</span><span class='hs-layout'>,</span>
<a name="line-73"></a> <span class='hs-varid'>commandExtraArgs</span> <span class='hs-keyglyph'>=</span> <span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>,</span>
<a name="line-74"></a> <span class='hs-varid'>commandExtraArgHelp</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"[TAGNAME]"</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span>
<a name="line-75"></a> <span class='hs-varid'>commandCommand</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tagCmd</span><span class='hs-layout'>,</span>
<a name="line-76"></a> <span class='hs-varid'>commandPrereq</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>amInHashedRepository</span><span class='hs-layout'>,</span>
<a name="line-77"></a> <span class='hs-varid'>commandGetArgPossibilities</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>[]</span><span class='hs-layout'>,</span>
<a name="line-78"></a> <span class='hs-varid'>commandArgdefaults</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nodefaults</span><span class='hs-layout'>,</span>
<a name="line-79"></a> <span class='hs-varid'>commandAdvancedOptions</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>nocompress</span><span class='hs-layout'>,</span><span class='hs-varid'>umaskOption</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span>
<a name="line-80"></a> <span class='hs-varid'>commandBasicOptions</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>patchnameOption</span><span class='hs-layout'>,</span> <span class='hs-varid'>author</span><span class='hs-layout'>,</span>
<a name="line-81"></a> <span class='hs-varid'>pipeInteractive</span><span class='hs-layout'>,</span>
<a name="line-82"></a> <span class='hs-varid'>askLongComment</span><span class='hs-layout'>,</span>
<a name="line-83"></a> <span class='hs-varid'>workingRepoDir</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>}</span>
<a name="line-84"></a>
<a name="line-85"></a><a name="tagCmd"></a><span class='hs-definition'>tagCmd</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DarcsFlag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-86"></a><span class='hs-definition'>tagCmd</span> <span class='hs-varid'>opts</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withRepoLock</span> <span class='hs-varid'>opts</span> <span class='hs-varop'>$</span> <span class='hs-conid'>RepoJob</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>repository</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'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-87"></a> <span class='hs-varid'>date</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getDate</span> <span class='hs-varid'>opts</span>
<a name="line-88"></a> <span class='hs-varid'>the_author</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getAuthor</span> <span class='hs-varid'>opts</span>
<a name="line-89"></a> <span class='hs-varid'>deps</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getTagsRight</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>readRepo</span> <span class='hs-varid'>repository</span>
<a name="line-90"></a> <span class='hs-layout'>(</span><span class='hs-varid'>name</span><span class='hs-layout'>,</span> <span class='hs-varid'>long_comment</span><span class='hs-layout'>,</span> <span class='hs-varid'>mlogf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>get_name_log</span> <span class='hs-layout'>(</span><span class='hs-conid'>NilFL</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'>a</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>opts</span> <span class='hs-varid'>args</span>
<a name="line-91"></a> <span class='hs-varid'>myinfo</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>patchinfo</span> <span class='hs-varid'>date</span> <span class='hs-varid'>name</span> <span class='hs-varid'>the_author</span> <span class='hs-varid'>long_comment</span>
<a name="line-92"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>mypatch</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>infopatch</span> <span class='hs-varid'>myinfo</span> <span class='hs-conid'>NilFL</span>
<a name="line-93"></a><span class='hs-comment'>-- Warning: A do-notation statement discarded a result of type Darcs.Repository.InternalTypes.Repository p r u r.</span>
<a name="line-94"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>tentativelyAddPatch</span> <span class='hs-varid'>repository</span> <span class='hs-layout'>(</span><span class='hs-varid'>compression</span> <span class='hs-varid'>opts</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>n2pia</span> <span class='hs-varop'>$</span> <span class='hs-varid'>adddeps</span> <span class='hs-varid'>mypatch</span> <span class='hs-varid'>deps</span>
<a name="line-95"></a> <span class='hs-varid'>finalizeRepositoryChanges</span> <span class='hs-varid'>repository</span>
<a name="line-96"></a> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-varid'>removeFile</span> <span class='hs-varid'>mlogf</span>
<a name="line-97"></a> <span class='hs-varid'>putStrLn</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Finished tagging patch '"</span><span class='hs-varop'>++</span><span class='hs-varid'>name</span><span class='hs-varop'>++</span><span class='hs-str'>"'"</span>
<a name="line-98"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>get_name_log</span> <span class='hs-keyglyph'>::</span><span class='hs-layout'>(</span><span class='hs-conid'>Patchy</span> <span class='hs-varid'>prim</span><span class='hs-layout'>,</span> <span class='hs-conid'>PrimPatch</span> <span class='hs-varid'>prim</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>prim</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DarcsFlag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</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'>String</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>String</span><span class='hs-layout'>)</span>
<a name="line-99"></a> <span class='hs-varid'>get_name_log</span> <span class='hs-varid'>nilFL</span> <span class='hs-varid'>o</span> <span class='hs-varid'>a</span>
<a name="line-100"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>o2</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>o</span> <span class='hs-keyword'>else</span> <span class='hs-layout'>(</span><span class='hs-varid'>add_patch_name</span> <span class='hs-varid'>o</span> <span class='hs-layout'>(</span><span class='hs-varid'>unwords</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-101"></a> <span class='hs-layout'>(</span><span class='hs-varid'>name</span><span class='hs-layout'>,</span> <span class='hs-varid'>comment</span><span class='hs-layout'>,</span> <span class='hs-varid'>mlogf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getLog</span> <span class='hs-varid'>o2</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-varid'>worldReadableTemp</span> <span class='hs-str'>"darcs-tag"</span><span class='hs-layout'>)</span> <span class='hs-varid'>nilFL</span>
<a name="line-102"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>name</span> <span class='hs-varop'><</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>hPutStr</span> <span class='hs-varid'>stderr</span> <span class='hs-varop'>$</span>
<a name="line-103"></a> <span class='hs-str'>"Do you really want to tag '"</span>
<a name="line-104"></a> <span class='hs-varop'>++</span><span class='hs-varid'>name</span><span class='hs-varop'>++</span><span class='hs-str'>"'? If not type: darcs obliterate --last=1\n"</span>
<a name="line-105"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-str'>"TAG "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>name</span><span class='hs-layout'>,</span> <span class='hs-varid'>comment</span><span class='hs-layout'>,</span> <span class='hs-varid'>mlogf</span><span class='hs-layout'>)</span>
<a name="line-106"></a> <span class='hs-varid'>add_patch_name</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DarcsFlag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DarcsFlag</span><span class='hs-keyglyph'>]</span>
<a name="line-107"></a> <span class='hs-varid'>add_patch_name</span> <span class='hs-varid'>o</span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>|</span> <span class='hs-varid'>has_patch_name</span> <span class='hs-varid'>o</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>o</span>
<a name="line-108"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>PatchName</span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span> <span class='hs-varid'>o</span>
<a name="line-109"></a> <span class='hs-varid'>has_patch_name</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchName</span> <span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-110"></a> <span class='hs-varid'>has_patch_name</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-varid'>fs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>has_patch_name</span> <span class='hs-varid'>fs</span>
<a name="line-111"></a> <span class='hs-varid'>has_patch_name</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-112"></a>
<a name="line-113"></a><span class='hs-comment'>-- This may be useful for developers, but users don't care about</span>
<a name="line-114"></a><span class='hs-comment'>-- internals:</span>
<a name="line-115"></a><span class='hs-comment'>--</span>
<a name="line-116"></a><span class='hs-comment'>-- A tagged version automatically depends on all patches in the</span>
<a name="line-117"></a><span class='hs-comment'>-- repository. This allows you to later reproduce precisely that</span>
<a name="line-118"></a><span class='hs-comment'>-- version. The tag does this by depending on all patches in the</span>
<a name="line-119"></a><span class='hs-comment'>-- repository, except for those which are depended upon by other tags</span>
<a name="line-120"></a><span class='hs-comment'>-- already in the repository. In the common case of a sequential</span>
<a name="line-121"></a><span class='hs-comment'>-- series of tags, this means that the tag depends on all patches</span>
<a name="line-122"></a><span class='hs-comment'>-- since the last tag, plus that tag itself.</span>
<a name="line-123"></a>
</pre></body>
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