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<th class=docs><h1>ls-files.c</h1></th>
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<div class='highlight'><pre><span></span><span class="cm">/*</span>
<span class="cm"> * libgit2 "ls-files" example - shows how to view all files currently in the index</span>
<span class="cm"> *</span>
<span class="cm"> * Written by the libgit2 contributors</span>
<span class="cm"> *</span>
<span class="cm"> * To the extent possible under law, the author(s) have dedicated all copyright</span>
<span class="cm"> * and related and neighboring rights to this software to the public domain</span>
<span class="cm"> * worldwide. This software is distributed without any warranty.</span>
<span class="cm"> *</span>
<span class="cm"> * You should have received a copy of the CC0 Public Domain Dedication along</span>
<span class="cm"> * with this software. If not, see</span>
<span class="cm"> * <http://creativecommons.org/publicdomain/zero/1.0/>.</span>
<span class="cm"> */</span>
<span class="cp">#include</span> <span class="cpf">"common.h"</span><span class="cp"></span></pre></div>
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<p>This example demonstrates the libgit2 index APIs to roughly
simulate the output of <code>git ls-files</code>.
<code>git ls-files</code> has many options and this currently does not show them.</p>
<p><code>git ls-files</code> base command shows all paths in the index at that time.
This includes staged and committed files, but unstaged files will not display.</p>
<p>This currently supports the default behavior and the <code>--error-unmatch</code> option.</p>
</td>
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<div class='highlight'><pre><span class="k">struct</span> <span class="n">ls_options</span> <span class="p">{</span>
<span class="kt">int</span> <span class="n">error_unmatch</span><span class="p">;</span>
<span class="kt">char</span> <span class="o">*</span><span class="n">files</span><span class="p">[</span><span class="mi">1024</span><span class="p">];</span>
<span class="kt">size_t</span> <span class="n">file_count</span><span class="p">;</span>
<span class="p">};</span>
<span class="k">static</span> <span class="kt">void</span> <span class="nf">usage</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">message</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">arg</span><span class="p">)</span>
<span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="n">message</span> <span class="o">&&</span> <span class="n">arg</span><span class="p">)</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">message</span><span class="p">,</span> <span class="n">arg</span><span class="p">);</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="n">message</span><span class="p">)</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">message</span><span class="p">);</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"usage: ls-files [--error-unmatch] [--] [<file>...]</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">static</span> <span class="kt">int</span> <span class="nf">parse_options</span><span class="p">(</span><span class="k">struct</span> <span class="n">ls_options</span> <span class="o">*</span><span class="n">opts</span><span class="p">,</span> <span class="kt">int</span> <span class="n">argc</span><span class="p">,</span> <span class="kt">char</span> <span class="o">*</span><span class="n">argv</span><span class="p">[])</span>
<span class="p">{</span>
<span class="kt">int</span> <span class="n">parsing_files</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">i</span><span class="p">;</span>
<span class="n">memset</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="k">struct</span> <span class="n">ls_options</span><span class="p">));</span>
<span class="k">if</span> <span class="p">(</span><span class="n">argc</span> <span class="o"><</span> <span class="mi">2</span><span class="p">)</span>
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
<span class="k">for</span> <span class="p">(</span><span class="n">i</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">argc</span><span class="p">;</span> <span class="o">++</span><span class="n">i</span><span class="p">)</span> <span class="p">{</span>
<span class="kt">char</span> <span class="o">*</span><span class="n">a</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">];</span>
<span class="cm">/* if it doesn't start with a '-' or is after the '--' then it is a file */</span>
<span class="k">if</span> <span class="p">(</span><span class="n">a</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">!=</span> <span class="sc">'-'</span> <span class="o">||</span> <span class="n">parsing_files</span><span class="p">)</span> <span class="p">{</span>
<span class="n">parsing_files</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
<span class="cm">/* watch for overflows (just in case) */</span>
<span class="k">if</span> <span class="p">(</span><span class="n">opts</span><span class="o">-></span><span class="n">file_count</span> <span class="o">==</span> <span class="mi">1024</span><span class="p">)</span> <span class="p">{</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"ls-files can only support 1024 files at this time.</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
<span class="p">}</span>
<span class="n">opts</span><span class="o">-></span><span class="n">files</span><span class="p">[</span><span class="n">opts</span><span class="o">-></span><span class="n">file_count</span><span class="o">++</span><span class="p">]</span> <span class="o">=</span> <span class="n">a</span><span class="p">;</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="s">"--"</span><span class="p">))</span> <span class="p">{</span>
<span class="n">parsing_files</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="s">"--error-unmatch"</span><span class="p">))</span> <span class="p">{</span>
<span class="n">opts</span><span class="o">-></span><span class="n">error_unmatch</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="n">usage</span><span class="p">(</span><span class="s">"Unsupported argument"</span><span class="p">,</span> <span class="n">a</span><span class="p">);</span>
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">static</span> <span class="kt">int</span> <span class="nf">print_paths</span><span class="p">(</span><span class="k">struct</span> <span class="n">ls_options</span> <span class="o">*</span><span class="n">opts</span><span class="p">,</span> <span class="n">git_index</span> <span class="o">*</span><span class="n">index</span><span class="p">)</span>
<span class="p">{</span>
<span class="kt">size_t</span> <span class="n">i</span><span class="p">;</span>
<span class="k">const</span> <span class="n">git_index_entry</span> <span class="o">*</span><span class="n">entry</span><span class="p">;</span>
<span class="cm">/* if there are no files explicitly listed by the user print all entries in the index */</span>
<span class="k">if</span> <span class="p">(</span><span class="n">opts</span><span class="o">-></span><span class="n">file_count</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
<span class="kt">size_t</span> <span class="n">entry_count</span> <span class="o">=</span> <span class="n"><a name="git_index_entrycount-2" class="fnlink" href="../../#v1.6.0/group/index/git_index_entrycount">git_index_entrycount</a></span><span class="p">(</span><span class="n">index</span><span class="p">);</span>
<span class="k">for</span> <span class="p">(</span><span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">entry_count</span><span class="p">;</span> <span class="n">i</span><span class="o">++</span><span class="p">)</span> <span class="p">{</span>
<span class="n">entry</span> <span class="o">=</span> <span class="n"><a name="git_index_get_byindex-3" class="fnlink" href="../../#v1.6.0/group/index/git_index_get_byindex">git_index_get_byindex</a></span><span class="p">(</span><span class="n">index</span><span class="p">,</span> <span class="n">i</span><span class="p">);</span>
<span class="n">puts</span><span class="p">(</span><span class="n">entry</span><span class="o">-></span><span class="n">path</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
<span class="p">}</span>
<span class="cm">/* loop through the files found in the args and print them if they exist */</span>
<span class="k">for</span> <span class="p">(</span><span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">opts</span><span class="o">-></span><span class="n">file_count</span><span class="p">;</span> <span class="o">++</span><span class="n">i</span><span class="p">)</span> <span class="p">{</span>
<span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">path</span> <span class="o">=</span> <span class="n">opts</span><span class="o">-></span><span class="n">files</span><span class="p">[</span><span class="n">i</span><span class="p">];</span>
<span class="k">if</span> <span class="p">((</span><span class="n">entry</span> <span class="o">=</span> <span class="n"><a name="git_index_get_bypath-4" class="fnlink" href="../../#v1.6.0/group/index/git_index_get_bypath">git_index_get_bypath</a></span><span class="p">(</span><span class="n">index</span><span class="p">,</span> <span class="n">path</span><span class="p">,</span> <span class="n">GIT_INDEX_STAGE_NORMAL</span><span class="p">))</span> <span class="o">!=</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>
<span class="n">puts</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="n">opts</span><span class="o">-></span><span class="n">error_unmatch</span><span class="p">)</span> <span class="p">{</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"error: pathspec '%s' did not match any file(s) known to git.</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">path</span><span class="p">);</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"Did you forget to 'git add'?</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="k">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
<span class="p">}</span>
<span class="kt">int</span> <span class="nf">lg2_ls_files</span><span class="p">(</span><span class="n">git_repository</span> <span class="o">*</span><span class="n">repo</span><span class="p">,</span> <span class="kt">int</span> <span class="n">argc</span><span class="p">,</span> <span class="kt">char</span> <span class="o">*</span><span class="n">argv</span><span class="p">[])</span>
<span class="p">{</span>
<span class="n">git_index</span> <span class="o">*</span><span class="n">index</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
<span class="k">struct</span> <span class="n">ls_options</span> <span class="n">opts</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">error</span><span class="p">;</span>
<span class="k">if</span> <span class="p">((</span><span class="n">error</span> <span class="o">=</span> <span class="n">parse_options</span><span class="p">(</span><span class="o">&</span><span class="n">opts</span><span class="p">,</span> <span class="n">argc</span><span class="p">,</span> <span class="n">argv</span><span class="p">))</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">return</span> <span class="n">error</span><span class="p">;</span>
<span class="k">if</span> <span class="p">((</span><span class="n">error</span> <span class="o">=</span> <span class="n"><a name="git_repository_index-5" class="fnlink" href="../../#v1.6.0/group/repository/git_repository_index">git_repository_index</a></span><span class="p">(</span><span class="o">&</span><span class="n">index</span><span class="p">,</span> <span class="n">repo</span><span class="p">))</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span>
<span class="k">goto</span> <span class="n">cleanup</span><span class="p">;</span>
<span class="n">error</span> <span class="o">=</span> <span class="n">print_paths</span><span class="p">(</span><span class="o">&</span><span class="n">opts</span><span class="p">,</span> <span class="n">index</span><span class="p">);</span>
<span class="nl">cleanup</span><span class="p">:</span>
<span class="n"><a name="git_index_free-1" class="fnlink" href="../../#v1.6.0/group/index/git_index_free">git_index_free</a></span><span class="p">(</span><span class="n">index</span><span class="p">);</span>
<span class="k">return</span> <span class="n">error</span><span class="p">;</span>
<span class="p">}</span></pre></div>
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