summaryrefslogtreecommitdiff
path: root/ex/v1.4.6/merge.html
blob: dc3c34d0511a6642ad041978e0e450a70a044de5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="content-type" content="text/html;charset=utf-8">
  <title>merge.c</title>
  <link rel="stylesheet" href="../css.css">
  <style type="text/css">
    a.fnlink {text-decoration: none}
    a.fnlink:hover {text-decoration: underline}
  </style>
</head>
<body>
<div id='container'>
  <div id="background"></div>
  <div id="jump_to">
    Jump To &hellip;
    <div id="jump_wrapper">
      <div id="jump_page">
        <a class="source" href="../../#v1.4.6">API Docs</a>
          <a class="source" href="add.html">add.c</a>
          <a class="source" href="args.html">args.c</a>
          <a class="source" href="blame.html">blame.c</a>
          <a class="source" href="cat-file.html">cat-file.c</a>
          <a class="source" href="checkout.html">checkout.c</a>
          <a class="source" href="clone.html">clone.c</a>
          <a class="source" href="commit.html">commit.c</a>
          <a class="source" href="common.html">common.c</a>
          <a class="source" href="config.html">config.c</a>
          <a class="source" href="describe.html">describe.c</a>
          <a class="source" href="diff.html">diff.c</a>
          <a class="source" href="fetch.html">fetch.c</a>
          <a class="source" href="for-each-ref.html">for-each-ref.c</a>
          <a class="source" href="general.html">general.c</a>
          <a class="source" href="index-pack.html">index-pack.c</a>
          <a class="source" href="init.html">init.c</a>
          <a class="source" href="lg2.html">lg2.c</a>
          <a class="source" href="log.html">log.c</a>
          <a class="source" href="ls-files.html">ls-files.c</a>
          <a class="source" href="ls-remote.html">ls-remote.c</a>
          <a class="source" href="merge.html">merge.c</a>
          <a class="source" href="push.html">push.c</a>
          <a class="source" href="remote.html">remote.c</a>
          <a class="source" href="rev-list.html">rev-list.c</a>
          <a class="source" href="rev-parse.html">rev-parse.c</a>
          <a class="source" href="show-index.html">show-index.c</a>
          <a class="source" href="stash.html">stash.c</a>
          <a class="source" href="status.html">status.c</a>
          <a class="source" href="tag.html">tag.c</a>
      </div>
    </div>
  </div>
  <table cellspacing=0 cellpadding=0>
  <thead>
    <tr>
      <th class=docs><h1>merge.c</h1></th>
      <th class=code></th>
    </tr>
  </thead>
  <tbody>
    <tr id='section-1'>
      <td class=docs>
        <div class="pilwrap">
          <a class="pilcrow" href="#section-1">&#182;</a>
        </div>
        
      </td>
      <td class=code>
        <div class='highlight'><pre><span></span><span class="cm">/*</span>
<span class="cm"> * libgit2 &quot;merge&quot; example - shows how to perform merges</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"> * &lt;http://creativecommons.org/publicdomain/zero/1.0/&gt;.</span>
<span class="cm"> */</span>

<span class="cp">#include</span> <span class="cpf">&quot;common.h&quot;</span><span class="cp"></span></pre></div>
      </td>
    </tr>
    <tr id='section-2'>
      <td class=docs>
        <div class="pilwrap">
          <a class="pilcrow" href="#section-2">&#182;</a>
        </div>
        <p>The following example demonstrates how to do merges with libgit2.</p>

<p>It will merge whatever commit-ish you pass in into the current branch.</p>

<p>Recognized options are :
 --no-commit: don&#39;t actually commit the merge.</p>

      </td>
      <td class=code>
        <div class='highlight'><pre><span class="k">struct</span> <span class="n">merge_options</span> <span class="p">{</span>
  <span class="k">const</span> <span class="kt">char</span> <span class="o">**</span><span class="n">heads</span><span class="p">;</span>
  <span class="kt">size_t</span> <span class="n">heads_count</span><span class="p">;</span>

  <span class="n">git_annotated_commit</span> <span class="o">**</span><span class="n">annotated</span><span class="p">;</span>
  <span class="kt">size_t</span> <span class="n">annotated_count</span><span class="p">;</span>

  <span class="kt">int</span> <span class="nl">no_commit</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">void</span> <span class="nf">print_usage</span><span class="p">(</span><span class="kt">void</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">&quot;usage: merge [--no-commit] &lt;commit...&gt;</span><span class="se">\n</span><span class="s">&quot;</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">void</span> <span class="nf">merge_options_init</span><span class="p">(</span><span class="k">struct</span> <span class="n">merge_options</span> <span class="o">*</span><span class="n">opts</span><span class="p">)</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="o">*</span><span class="n">opts</span><span class="p">));</span>

  <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
  <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads_count</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
  <span class="n">opts</span><span class="o">-&gt;</span><span class="n">annotated</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
  <span class="n">opts</span><span class="o">-&gt;</span><span class="n">annotated_count</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
<span class="p">}</span>

<span class="k">static</span> <span class="kt">void</span> <span class="nf">opts_add_refish</span><span class="p">(</span><span class="k">struct</span> <span class="n">merge_options</span> <span class="o">*</span><span class="n">opts</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">refish</span><span class="p">)</span>
<span class="p">{</span>
  <span class="kt">size_t</span> <span class="n">sz</span><span class="p">;</span>

  <span class="n">assert</span><span class="p">(</span><span class="n">opts</span> <span class="o">!=</span> <span class="nb">NULL</span><span class="p">);</span>

  <span class="n">sz</span> <span class="o">=</span> <span class="o">++</span><span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads_count</span> <span class="o">*</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads</span><span class="p">[</span><span class="mi">0</span><span class="p">]);</span>
  <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads</span> <span class="o">=</span> <span class="n">xrealloc</span><span class="p">((</span><span class="kt">void</span> <span class="o">*</span><span class="p">)</span> <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads</span><span class="p">,</span> <span class="n">sz</span><span class="p">);</span>
  <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads</span><span class="p">[</span><span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads_count</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">=</span> <span class="n">refish</span><span class="p">;</span>
<span class="p">}</span>

<span class="k">static</span> <span class="kt">void</span> <span class="nf">parse_options</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">**</span><span class="n">repo_path</span><span class="p">,</span> <span class="k">struct</span> <span class="n">merge_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="k">struct</span> <span class="n">args_info</span> <span class="n">args</span> <span class="o">=</span> <span class="n">ARGS_INFO_INIT</span><span class="p">;</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">argc</span> <span class="o">&lt;=</span> <span class="mi">1</span><span class="p">)</span>
    <span class="n">print_usage</span><span class="p">();</span>

  <span class="k">for</span> <span class="p">(</span><span class="n">args</span><span class="p">.</span><span class="n">pos</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span> <span class="n">args</span><span class="p">.</span><span class="n">pos</span> <span class="o">&lt;</span> <span class="n">argc</span><span class="p">;</span> <span class="o">++</span><span class="n">args</span><span class="p">.</span><span class="n">pos</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">curr</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="n">args</span><span class="p">.</span><span class="n">pos</span><span class="p">];</span>

    <span class="k">if</span> <span class="p">(</span><span class="n">curr</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">!=</span> <span class="sc">&#39;-&#39;</span><span class="p">)</span> <span class="p">{</span>
      <span class="n">opts_add_refish</span><span class="p">(</span><span class="n">opts</span><span class="p">,</span> <span class="n">curr</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">curr</span><span class="p">,</span> <span class="s">&quot;--no-commit&quot;</span><span class="p">))</span> <span class="p">{</span>
      <span class="n">opts</span><span class="o">-&gt;</span><span class="n">no_commit</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="n">match_str_arg</span><span class="p">(</span><span class="n">repo_path</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">args</span><span class="p">,</span> <span class="s">&quot;--git-dir&quot;</span><span class="p">))</span> <span class="p">{</span>
      <span class="k">continue</span><span class="p">;</span>
    <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
      <span class="n">print_usage</span><span class="p">();</span>
    <span class="p">}</span>
  <span class="p">}</span>
<span class="p">}</span>

<span class="k">static</span> <span class="kt">int</span> <span class="nf">resolve_heads</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="k">struct</span> <span class="n">merge_options</span> <span class="o">*</span><span class="n">opts</span><span class="p">)</span>
<span class="p">{</span>
  <span class="n">git_annotated_commit</span> <span class="o">**</span><span class="n">annotated</span> <span class="o">=</span> <span class="n">calloc</span><span class="p">(</span><span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads_count</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">git_annotated_commit</span> <span class="o">*</span><span class="p">));</span>
  <span class="kt">size_t</span> <span class="n">annotated_count</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span> <span class="n">i</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">err</span> <span class="o">=</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">0</span><span class="p">;</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads_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">err</span> <span class="o">=</span> <span class="n">resolve_refish</span><span class="p">(</span><span class="o">&amp;</span><span class="n">annotated</span><span class="p">[</span><span class="n">annotated_count</span><span class="o">++</span><span class="p">],</span> <span class="n">repo</span><span class="p">,</span> <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads</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">err</span> <span class="o">!=</span> <span class="mi">0</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">&quot;failed to resolve refish %s: %s</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="n"><a name="git_error_last-8" class="fnlink" href="../../#v1.4.6/group/error/git_error_last">git_error_last</a></span><span class="p">()</span><span class="o">-&gt;</span><span class="n">message</span><span class="p">);</span>
      <span class="n">annotated_count</span><span class="o">--</span><span class="p">;</span>
      <span class="k">continue</span><span class="p">;</span>
    <span class="p">}</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">annotated_count</span> <span class="o">!=</span> <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads_count</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">&quot;unable to parse some refish</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
    <span class="n">free</span><span class="p">(</span><span class="n">annotated</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">-&gt;</span><span class="n">annotated</span> <span class="o">=</span> <span class="n">annotated</span><span class="p">;</span>
  <span class="n">opts</span><span class="o">-&gt;</span><span class="n">annotated_count</span> <span class="o">=</span> <span class="n">annotated_count</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">perform_fastforward</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="k">const</span> <span class="n">git_oid</span> <span class="o">*</span><span class="n">target_oid</span><span class="p">,</span> <span class="kt">int</span> <span class="n">is_unborn</span><span class="p">)</span>
<span class="p">{</span>
  <span class="n">git_checkout_options</span> <span class="n">ff_checkout_options</span> <span class="o">=</span> <span class="n">GIT_CHECKOUT_OPTIONS_INIT</span><span class="p">;</span>
  <span class="n">git_reference</span> <span class="o">*</span><span class="n">target_ref</span><span class="p">;</span>
  <span class="n">git_reference</span> <span class="o">*</span><span class="n">new_target_ref</span><span class="p">;</span>
  <span class="n">git_object</span> <span class="o">*</span><span class="n">target</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">err</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">is_unborn</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">symbolic_ref</span><span class="p">;</span>
    <span class="n">git_reference</span> <span class="o">*</span><span class="n">head_ref</span><span class="p">;</span>

    <span class="cm">/* HEAD reference is unborn, lookup manually so we don&#39;t try to resolve it */</span>
    <span class="n">err</span> <span class="o">=</span> <span class="n"><a name="git_reference_lookup-21" class="fnlink" href="../../#v1.4.6/group/reference/git_reference_lookup">git_reference_lookup</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">head_ref</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="s">&quot;HEAD&quot;</span><span class="p">);</span>
    <span class="k">if</span> <span class="p">(</span><span class="n">err</span> <span class="o">!=</span> <span class="mi">0</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">&quot;failed to lookup HEAD ref</span><span class="se">\n</span><span class="s">&quot;</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="cm">/* Grab the reference HEAD should be pointing to */</span>
    <span class="n">symbolic_ref</span> <span class="o">=</span> <span class="n"><a name="git_reference_symbolic_target-24" class="fnlink" href="../../#v1.4.6/group/reference/git_reference_symbolic_target">git_reference_symbolic_target</a></span><span class="p">(</span><span class="n">head_ref</span><span class="p">);</span>

    <span class="cm">/* Create our master reference on the target OID */</span>
    <span class="n">err</span> <span class="o">=</span> <span class="n"><a name="git_reference_create-23" class="fnlink" href="../../#v1.4.6/group/reference/git_reference_create">git_reference_create</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">target_ref</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="n">symbolic_ref</span><span class="p">,</span> <span class="n">target_oid</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
    <span class="k">if</span> <span class="p">(</span><span class="n">err</span> <span class="o">!=</span> <span class="mi">0</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">&quot;failed to create master reference</span><span class="se">\n</span><span class="s">&quot;</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"><a name="git_reference_free-27" class="fnlink" href="../../#v1.4.6/group/reference/git_reference_free">git_reference_free</a></span><span class="p">(</span><span class="n">head_ref</span><span class="p">);</span>
  <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
    <span class="cm">/* HEAD exists, just lookup and resolve */</span>
    <span class="n">err</span> <span class="o">=</span> <span class="n"><a name="git_repository_head-31" class="fnlink" href="../../#v1.4.6/group/repository/git_repository_head">git_repository_head</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">target_ref</span><span class="p">,</span> <span class="n">repo</span><span class="p">);</span>
    <span class="k">if</span> <span class="p">(</span><span class="n">err</span> <span class="o">!=</span> <span class="mi">0</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">&quot;failed to get HEAD reference</span><span class="se">\n</span><span class="s">&quot;</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="cm">/* Lookup the target object */</span>
  <span class="n">err</span> <span class="o">=</span> <span class="n"><a name="git_object_lookup-17" class="fnlink" href="../../#v1.4.6/group/object/git_object_lookup">git_object_lookup</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">target</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="n">target_oid</span><span class="p">,</span> <span class="n">GIT_OBJECT_COMMIT</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">err</span> <span class="o">!=</span> <span class="mi">0</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">&quot;failed to lookup OID %s</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n"><a name="git_oid_tostr_s-19" class="fnlink" href="../../#v1.4.6/group/oid/git_oid_tostr_s">git_oid_tostr_s</a></span><span class="p">(</span><span class="n">target_oid</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="cm">/* Checkout the result so the workdir is in the expected state */</span>
  <span class="n">ff_checkout_options</span><span class="p">.</span><span class="n">checkout_strategy</span> <span class="o">=</span> <span class="n">GIT_CHECKOUT_SAFE</span><span class="p">;</span>
  <span class="n">err</span> <span class="o">=</span> <span class="n"><a name="git_checkout_tree-5" class="fnlink" href="../../#v1.4.6/group/checkout/git_checkout_tree">git_checkout_tree</a></span><span class="p">(</span><span class="n">repo</span><span class="p">,</span> <span class="n">target</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">ff_checkout_options</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">err</span> <span class="o">!=</span> <span class="mi">0</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">&quot;failed to checkout HEAD reference</span><span class="se">\n</span><span class="s">&quot;</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="cm">/* Move the target reference to the target OID */</span>
  <span class="n">err</span> <span class="o">=</span> <span class="n"><a name="git_reference_set_target-26" class="fnlink" href="../../#v1.4.6/group/reference/git_reference_set_target">git_reference_set_target</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">new_target_ref</span><span class="p">,</span> <span class="n">target_ref</span><span class="p">,</span> <span class="n">target_oid</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">err</span> <span class="o">!=</span> <span class="mi">0</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">&quot;failed to move HEAD reference</span><span class="se">\n</span><span class="s">&quot;</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"><a name="git_reference_free-28" class="fnlink" href="../../#v1.4.6/group/reference/git_reference_free">git_reference_free</a></span><span class="p">(</span><span class="n">target_ref</span><span class="p">);</span>
  <span class="n"><a name="git_reference_free-29" class="fnlink" href="../../#v1.4.6/group/reference/git_reference_free">git_reference_free</a></span><span class="p">(</span><span class="n">new_target_ref</span><span class="p">);</span>
  <span class="n"><a name="git_object_free-18" class="fnlink" href="../../#v1.4.6/group/object/git_object_free">git_object_free</a></span><span class="p">(</span><span class="n">target</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">void</span> <span class="nf">output_conflicts</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="n">git_index_conflict_iterator</span> <span class="o">*</span><span class="n">conflicts</span><span class="p">;</span>
  <span class="k">const</span> <span class="n">git_index_entry</span> <span class="o">*</span><span class="n">ancestor</span><span class="p">;</span>
  <span class="k">const</span> <span class="n">git_index_entry</span> <span class="o">*</span><span class="n">our</span><span class="p">;</span>
  <span class="k">const</span> <span class="n">git_index_entry</span> <span class="o">*</span><span class="n">their</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">err</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>

  <span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_index_conflict_iterator_new-12" class="fnlink" href="../../#v1.4.6/group/index/git_index_conflict_iterator_new">git_index_conflict_iterator_new</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">conflicts</span><span class="p">,</span> <span class="n">index</span><span class="p">),</span> <span class="s">&quot;failed to create conflict iterator&quot;</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>

  <span class="k">while</span> <span class="p">((</span><span class="n">err</span> <span class="o">=</span> <span class="n"><a name="git_index_conflict_next-13" class="fnlink" href="../../#v1.4.6/group/index/git_index_conflict_next">git_index_conflict_next</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">ancestor</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">our</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">their</span><span class="p">,</span> <span class="n">conflicts</span><span class="p">))</span> <span class="o">==</span> <span class="mi">0</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">&quot;conflict: a:%s o:%s t:%s</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span>
            <span class="n">ancestor</span> <span class="o">?</span> <span class="n">ancestor</span><span class="o">-&gt;</span><span class="nl">path</span> <span class="p">:</span> <span class="s">&quot;NULL&quot;</span><span class="p">,</span>
            <span class="n">our</span><span class="o">-&gt;</span><span class="n">path</span> <span class="o">?</span> <span class="n">our</span><span class="o">-&gt;</span><span class="nl">path</span> <span class="p">:</span> <span class="s">&quot;NULL&quot;</span><span class="p">,</span>
            <span class="n">their</span><span class="o">-&gt;</span><span class="n">path</span> <span class="o">?</span> <span class="n">their</span><span class="o">-&gt;</span><span class="nl">path</span> <span class="p">:</span> <span class="s">&quot;NULL&quot;</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">err</span> <span class="o">!=</span> <span class="n">GIT_ITEROVER</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">&quot;error iterating conflicts</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n"><a name="git_index_conflict_iterator_free-14" class="fnlink" href="../../#v1.4.6/group/index/git_index_conflict_iterator_free">git_index_conflict_iterator_free</a></span><span class="p">(</span><span class="n">conflicts</span><span class="p">);</span>
<span class="p">}</span>

<span class="k">static</span> <span class="kt">int</span> <span class="nf">create_merge_commit</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="n">git_index</span> <span class="o">*</span><span class="n">index</span><span class="p">,</span> <span class="k">struct</span> <span class="n">merge_options</span> <span class="o">*</span><span class="n">opts</span><span class="p">)</span>
<span class="p">{</span>
  <span class="n">git_oid</span> <span class="n">tree_oid</span><span class="p">,</span> <span class="n">commit_oid</span><span class="p">;</span>
  <span class="n">git_tree</span> <span class="o">*</span><span class="n">tree</span><span class="p">;</span>
  <span class="n">git_signature</span> <span class="o">*</span><span class="n">sign</span><span class="p">;</span>
  <span class="n">git_reference</span> <span class="o">*</span><span class="n">merge_ref</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
  <span class="n">git_annotated_commit</span> <span class="o">*</span><span class="n">merge_commit</span><span class="p">;</span>
  <span class="n">git_reference</span> <span class="o">*</span><span class="n">head_ref</span><span class="p">;</span>
  <span class="n">git_commit</span> <span class="o">**</span><span class="n">parents</span> <span class="o">=</span> <span class="n">calloc</span><span class="p">(</span><span class="n">opts</span><span class="o">-&gt;</span><span class="n">annotated_count</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">git_commit</span> <span class="o">*</span><span class="p">));</span>
  <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">msg_target</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
  <span class="kt">size_t</span> <span class="n">msglen</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
  <span class="kt">char</span> <span class="o">*</span><span class="n">msg</span><span class="p">;</span>
  <span class="kt">size_t</span> <span class="n">i</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">err</span><span class="p">;</span>

  <span class="cm">/* Grab our needed references */</span>
  <span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_repository_head-32" class="fnlink" href="../../#v1.4.6/group/repository/git_repository_head">git_repository_head</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">head_ref</span><span class="p">,</span> <span class="n">repo</span><span class="p">),</span> <span class="s">&quot;failed to get repo HEAD&quot;</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">resolve_refish</span><span class="p">(</span><span class="o">&amp;</span><span class="n">merge_commit</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads</span><span class="p">[</span><span class="mi">0</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">&quot;failed to resolve refish %s&quot;</span><span class="p">,</span> <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads</span><span class="p">[</span><span class="mi">0</span><span class="p">]);</span>
    <span class="n">free</span><span class="p">(</span><span class="n">parents</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="cm">/* Maybe that&#39;s a ref, so DWIM it */</span>
  <span class="n">err</span> <span class="o">=</span> <span class="n"><a name="git_reference_dwim-22" class="fnlink" href="../../#v1.4.6/group/reference/git_reference_dwim">git_reference_dwim</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">merge_ref</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="n">opts</span><span class="o">-&gt;</span><span class="n">heads</span><span class="p">[</span><span class="mi">0</span><span class="p">]);</span>
  <span class="n">check_lg2</span><span class="p">(</span><span class="n">err</span><span class="p">,</span> <span class="s">&quot;failed to DWIM reference&quot;</span><span class="p">,</span> <span class="n"><a name="git_error_last-9" class="fnlink" href="../../#v1.4.6/group/error/git_error_last">git_error_last</a></span><span class="p">()</span><span class="o">-&gt;</span><span class="n">message</span><span class="p">);</span>

  <span class="cm">/* Grab a signature */</span>
  <span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_signature_now-36" class="fnlink" href="../../#v1.4.6/group/signature/git_signature_now">git_signature_now</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">sign</span><span class="p">,</span> <span class="s">&quot;Me&quot;</span><span class="p">,</span> <span class="s">&quot;me@example.com&quot;</span><span class="p">),</span> <span class="s">&quot;failed to create signature&quot;</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>

<span class="cp">#define MERGE_COMMIT_MSG &quot;Merge %s &#39;%s&#39;&quot;</span>
  <span class="cm">/* Prepare a standard merge commit message */</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">merge_ref</span> <span class="o">!=</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_branch_name-4" class="fnlink" href="../../#v1.4.6/group/branch/git_branch_name">git_branch_name</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">msg_target</span><span class="p">,</span> <span class="n">merge_ref</span><span class="p">),</span> <span class="s">&quot;failed to get branch name of merged ref&quot;</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
  <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
    <span class="n">msg_target</span> <span class="o">=</span> <span class="n"><a name="git_oid_tostr_s-20" class="fnlink" href="../../#v1.4.6/group/oid/git_oid_tostr_s">git_oid_tostr_s</a></span><span class="p">(</span><span class="n"><a name="git_annotated_commit_id-1" class="fnlink" href="../../#v1.4.6/group/annotated/git_annotated_commit_id">git_annotated_commit_id</a></span><span class="p">(</span><span class="n">merge_commit</span><span class="p">));</span>
  <span class="p">}</span>

  <span class="n">msglen</span> <span class="o">=</span> <span class="n">snprintf</span><span class="p">(</span><span class="nb">NULL</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">MERGE_COMMIT_MSG</span><span class="p">,</span> <span class="p">(</span><span class="n">merge_ref</span> <span class="o">?</span> <span class="s">&quot;branch&quot;</span> <span class="o">:</span> <span class="s">&quot;commit&quot;</span><span class="p">),</span> <span class="n">msg_target</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">msglen</span> <span class="o">&gt;</span> <span class="mi">0</span><span class="p">)</span> <span class="n">msglen</span><span class="o">++</span><span class="p">;</span>
  <span class="n">msg</span> <span class="o">=</span> <span class="n">malloc</span><span class="p">(</span><span class="n">msglen</span><span class="p">);</span>
  <span class="n">err</span> <span class="o">=</span> <span class="n">snprintf</span><span class="p">(</span><span class="n">msg</span><span class="p">,</span> <span class="n">msglen</span><span class="p">,</span> <span class="n">MERGE_COMMIT_MSG</span><span class="p">,</span> <span class="p">(</span><span class="n">merge_ref</span> <span class="o">?</span> <span class="s">&quot;branch&quot;</span> <span class="o">:</span> <span class="s">&quot;commit&quot;</span><span class="p">),</span> <span class="n">msg_target</span><span class="p">);</span>

  <span class="cm">/* This is only to silence the compiler */</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">err</span> <span class="o">&lt;</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="cm">/* Setup our parent commits */</span>
  <span class="n">err</span> <span class="o">=</span> <span class="n"><a name="git_reference_peel-30" class="fnlink" href="../../#v1.4.6/group/reference/git_reference_peel">git_reference_peel</a></span><span class="p">((</span><span class="n">git_object</span> <span class="o">**</span><span class="p">)</span><span class="o">&amp;</span><span class="n">parents</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">head_ref</span><span class="p">,</span> <span class="n">GIT_OBJECT_COMMIT</span><span class="p">);</span>
  <span class="n">check_lg2</span><span class="p">(</span><span class="n">err</span><span class="p">,</span> <span class="s">&quot;failed to peel head reference&quot;</span><span class="p">,</span> <span class="nb">NULL</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">&lt;</span> <span class="n">opts</span><span class="o">-&gt;</span><span class="n">annotated_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"><a name="git_commit_lookup-6" class="fnlink" href="../../#v1.4.6/group/commit/git_commit_lookup">git_commit_lookup</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">parents</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">repo</span><span class="p">,</span> <span class="n"><a name="git_annotated_commit_id-2" class="fnlink" href="../../#v1.4.6/group/annotated/git_annotated_commit_id">git_annotated_commit_id</a></span><span class="p">(</span><span class="n">opts</span><span class="o">-&gt;</span><span class="n">annotated</span><span class="p">[</span><span class="n">i</span><span class="p">]));</span>
  <span class="p">}</span>

  <span class="cm">/* Prepare our commit tree */</span>
  <span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_index_write_tree-10" class="fnlink" href="../../#v1.4.6/group/index/git_index_write_tree">git_index_write_tree</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">tree_oid</span><span class="p">,</span> <span class="n">index</span><span class="p">),</span> <span class="s">&quot;failed to write merged tree&quot;</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
  <span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_tree_lookup-37" class="fnlink" href="../../#v1.4.6/group/tree/git_tree_lookup">git_tree_lookup</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">tree</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">tree_oid</span><span class="p">),</span> <span class="s">&quot;failed to lookup tree&quot;</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>

  <span class="cm">/* Commit time ! */</span>
  <span class="n">err</span> <span class="o">=</span> <span class="n"><a name="git_commit_create-7" class="fnlink" href="../../#v1.4.6/group/commit/git_commit_create">git_commit_create</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">commit_oid</span><span class="p">,</span>
                          <span class="n">repo</span><span class="p">,</span> <span class="n"><a name="git_reference_name-25" class="fnlink" href="../../#v1.4.6/group/reference/git_reference_name">git_reference_name</a></span><span class="p">(</span><span class="n">head_ref</span><span class="p">),</span>
                          <span class="n">sign</span><span class="p">,</span> <span class="n">sign</span><span class="p">,</span>
                          <span class="nb">NULL</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span>
                          <span class="n">tree</span><span class="p">,</span>
                          <span class="n">opts</span><span class="o">-&gt;</span><span class="n">annotated_count</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> <span class="p">(</span><span class="k">const</span> <span class="n">git_commit</span> <span class="o">**</span><span class="p">)</span><span class="n">parents</span><span class="p">);</span>
  <span class="n">check_lg2</span><span class="p">(</span><span class="n">err</span><span class="p">,</span> <span class="s">&quot;failed to create commit&quot;</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>

  <span class="cm">/* We&#39;re done merging, cleanup the repository state */</span>
  <span class="n"><a name="git_repository_state_cleanup-34" class="fnlink" href="../../#v1.4.6/group/repository/git_repository_state_cleanup">git_repository_state_cleanup</a></span><span class="p">(</span><span class="n">repo</span><span class="p">);</span>

<span class="nl">cleanup</span><span class="p">:</span>
  <span class="n">free</span><span class="p">(</span><span class="n">parents</span><span class="p">);</span>
  <span class="k">return</span> <span class="n">err</span><span class="p">;</span>
<span class="p">}</span>

<span class="kt">int</span> <span class="nf">lg2_merge</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="k">struct</span> <span class="n">merge_options</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="n">git_repository_state_t</span> <span class="n">state</span><span class="p">;</span>
  <span class="n">git_merge_analysis_t</span> <span class="n">analysis</span><span class="p">;</span>
  <span class="n">git_merge_preference_t</span> <span class="n">preference</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="s">&quot;.&quot;</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">err</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>

  <span class="n">merge_options_init</span><span class="p">(</span><span class="o">&amp;</span><span class="n">opts</span><span class="p">);</span>
  <span class="n">parse_options</span><span class="p">(</span><span class="o">&amp;</span><span class="n">path</span><span class="p">,</span> <span class="o">&amp;</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="n">state</span> <span class="o">=</span> <span class="n"><a name="git_repository_state-35" class="fnlink" href="../../#v1.4.6/group/repository/git_repository_state">git_repository_state</a></span><span class="p">(</span><span class="n">repo</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">state</span> <span class="o">!=</span> <span class="n">GIT_REPOSITORY_STATE_NONE</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">&quot;repository is in unexpected state %d</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">state</span><span class="p">);</span>
    <span class="k">goto</span> <span class="n">cleanup</span><span class="p">;</span>
  <span class="p">}</span>

  <span class="n">err</span> <span class="o">=</span> <span class="n">resolve_heads</span><span class="p">(</span><span class="n">repo</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">opts</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">err</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">err</span> <span class="o">=</span> <span class="n"><a name="git_merge_analysis-15" class="fnlink" href="../../#v1.4.6/group/merge/git_merge_analysis">git_merge_analysis</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">analysis</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">preference</span><span class="p">,</span>
                           <span class="n">repo</span><span class="p">,</span>
                           <span class="p">(</span><span class="k">const</span> <span class="n">git_annotated_commit</span> <span class="o">**</span><span class="p">)</span><span class="n">opts</span><span class="p">.</span><span class="n">annotated</span><span class="p">,</span>
                           <span class="n">opts</span><span class="p">.</span><span class="n">annotated_count</span><span class="p">);</span>
  <span class="n">check_lg2</span><span class="p">(</span><span class="n">err</span><span class="p">,</span> <span class="s">&quot;merge analysis failed&quot;</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">analysis</span> <span class="o">&amp;</span> <span class="n">GIT_MERGE_ANALYSIS_UP_TO_DATE</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">printf</span><span class="p">(</span><span class="s">&quot;Already up-to-date</span><span class="se">\n</span><span class="s">&quot;</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">else</span> <span class="k">if</span> <span class="p">(</span><span class="n">analysis</span> <span class="o">&amp;</span> <span class="n">GIT_MERGE_ANALYSIS_UNBORN</span> <span class="o">||</span>
            <span class="p">(</span><span class="n">analysis</span> <span class="o">&amp;</span> <span class="n">GIT_MERGE_ANALYSIS_FASTFORWARD</span> <span class="o">&amp;&amp;</span>
            <span class="o">!</span><span class="p">(</span><span class="n">preference</span> <span class="o">&amp;</span> <span class="n">GIT_MERGE_PREFERENCE_NO_FASTFORWARD</span><span class="p">)))</span> <span class="p">{</span>
    <span class="k">const</span> <span class="n">git_oid</span> <span class="o">*</span><span class="n">target_oid</span><span class="p">;</span>
    <span class="k">if</span> <span class="p">(</span><span class="n">analysis</span> <span class="o">&amp;</span> <span class="n">GIT_MERGE_ANALYSIS_UNBORN</span><span class="p">)</span> <span class="p">{</span>
      <span class="n">printf</span><span class="p">(</span><span class="s">&quot;Unborn</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
    <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
      <span class="n">printf</span><span class="p">(</span><span class="s">&quot;Fast-forward</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
    <span class="p">}</span>

    <span class="cm">/* Since this is a fast-forward, there can be only one merge head */</span>
    <span class="n">target_oid</span> <span class="o">=</span> <span class="n"><a name="git_annotated_commit_id-3" class="fnlink" href="../../#v1.4.6/group/annotated/git_annotated_commit_id">git_annotated_commit_id</a></span><span class="p">(</span><span class="n">opts</span><span class="p">.</span><span class="n">annotated</span><span class="p">[</span><span class="mi">0</span><span class="p">]);</span>
    <span class="n">assert</span><span class="p">(</span><span class="n">opts</span><span class="p">.</span><span class="n">annotated_count</span> <span class="o">==</span> <span class="mi">1</span><span class="p">);</span>

    <span class="k">return</span> <span class="n">perform_fastforward</span><span class="p">(</span><span class="n">repo</span><span class="p">,</span> <span class="n">target_oid</span><span class="p">,</span> <span class="p">(</span><span class="n">analysis</span> <span class="o">&amp;</span> <span class="n">GIT_MERGE_ANALYSIS_UNBORN</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">analysis</span> <span class="o">&amp;</span> <span class="n">GIT_MERGE_ANALYSIS_NORMAL</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">git_merge_options</span> <span class="n">merge_opts</span> <span class="o">=</span> <span class="n">GIT_MERGE_OPTIONS_INIT</span><span class="p">;</span>
    <span class="n">git_checkout_options</span> <span class="n">checkout_opts</span> <span class="o">=</span> <span class="n">GIT_CHECKOUT_OPTIONS_INIT</span><span class="p">;</span>

    <span class="n">merge_opts</span><span class="p">.</span><span class="n">flags</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
    <span class="n">merge_opts</span><span class="p">.</span><span class="n">file_flags</span> <span class="o">=</span> <span class="n">GIT_MERGE_FILE_STYLE_DIFF3</span><span class="p">;</span>

    <span class="n">checkout_opts</span><span class="p">.</span><span class="n">checkout_strategy</span> <span class="o">=</span> <span class="n">GIT_CHECKOUT_FORCE</span><span class="o">|</span><span class="n">GIT_CHECKOUT_ALLOW_CONFLICTS</span><span class="p">;</span>

    <span class="k">if</span> <span class="p">(</span><span class="n">preference</span> <span class="o">&amp;</span> <span class="n">GIT_MERGE_PREFERENCE_FASTFORWARD_ONLY</span><span class="p">)</span> <span class="p">{</span>
      <span class="n">printf</span><span class="p">(</span><span class="s">&quot;Fast-forward is preferred, but only a merge is possible</span><span class="se">\n</span><span class="s">&quot;</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">err</span> <span class="o">=</span> <span class="n"><a name="git_merge-16" class="fnlink" href="../../#v1.4.6/group/merge/git_merge">git_merge</a></span><span class="p">(</span><span class="n">repo</span><span class="p">,</span>
                    <span class="p">(</span><span class="k">const</span> <span class="n">git_annotated_commit</span> <span class="o">**</span><span class="p">)</span><span class="n">opts</span><span class="p">.</span><span class="n">annotated</span><span class="p">,</span> <span class="n">opts</span><span class="p">.</span><span class="n">annotated_count</span><span class="p">,</span>
                    <span class="o">&amp;</span><span class="n">merge_opts</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">checkout_opts</span><span class="p">);</span>
    <span class="n">check_lg2</span><span class="p">(</span><span class="n">err</span><span class="p">,</span> <span class="s">&quot;merge failed&quot;</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="cm">/* If we get here, we actually performed the merge above */</span>

  <span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_repository_index-33" class="fnlink" href="../../#v1.4.6/group/repository/git_repository_index">git_repository_index</a></span><span class="p">(</span><span class="o">&amp;</span><span class="n">index</span><span class="p">,</span> <span class="n">repo</span><span class="p">),</span> <span class="s">&quot;failed to get repository index&quot;</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>

  <span class="k">if</span> <span class="p">(</span><span class="n"><a name="git_index_has_conflicts-11" class="fnlink" href="../../#v1.4.6/group/index/git_index_has_conflicts">git_index_has_conflicts</a></span><span class="p">(</span><span class="n">index</span><span class="p">))</span> <span class="p">{</span>
    <span class="cm">/* Handle conflicts */</span>
    <span class="n">output_conflicts</span><span class="p">(</span><span class="n">index</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">opts</span><span class="p">.</span><span class="n">no_commit</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">create_merge_commit</span><span class="p">(</span><span class="n">repo</span><span class="p">,</span> <span class="n">index</span><span class="p">,</span> <span class="o">&amp;</span><span class="n">opts</span><span class="p">);</span>
    <span class="n">printf</span><span class="p">(</span><span class="s">&quot;Merge made</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="p">}</span>

<span class="nl">cleanup</span><span class="p">:</span>
  <span class="n">free</span><span class="p">((</span><span class="kt">char</span> <span class="o">**</span><span class="p">)</span><span class="n">opts</span><span class="p">.</span><span class="n">heads</span><span class="p">);</span>
  <span class="n">free</span><span class="p">(</span><span class="n">opts</span><span class="p">.</span><span class="n">annotated</span><span class="p">);</span>

  <span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
<span class="p">}</span></pre></div>
      </td>
    </tr>
  </table>
</div>
</body>