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[git.git] / log-tree.c
1 #include "cache.h"
2 #include "diff.h"
3 #include "commit.h"
4 #include "log-tree.h"
6 static void show_parents(struct commit *commit, int abbrev)
7 {
8         struct commit_list *p;
9         for (p = commit->parents; p ; p = p->next) {
10                 struct commit *parent = p->item;
11                 printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
12         }
13 }
15 static int append_signoff(char *buf, int buf_sz, int at, const char *signoff)
16 {
17         int signoff_len = strlen(signoff);
18         static const char signed_off_by[] = "Signed-off-by: ";
19         char *cp = buf;
21         /* Do we have enough space to add it? */
22         if (buf_sz - at <= strlen(signed_off_by) + signoff_len + 2)
23                 return at;
25         /* First see if we already have the sign-off by the signer */
26         while (1) {
27                 cp = strstr(cp, signed_off_by);
28                 if (!cp)
29                         break;
30                 cp += strlen(signed_off_by);
31                 if ((cp + signoff_len < buf + at) &&
32                     !strncmp(cp, signoff, signoff_len) &&
33                     isspace(cp[signoff_len]))
34                         return at; /* we already have him */
35         }
37         strcpy(buf + at, signed_off_by);
38         at += strlen(signed_off_by);
39         strcpy(buf + at, signoff);
40         at += signoff_len;
41         buf[at++] = '\n';
42         buf[at] = 0;
43         return at;
44 }
46 void show_log(struct rev_info *opt, const char *sep)
47 {
48         static char this_header[16384];
49         struct log_info *log = opt->loginfo;
50         struct commit *commit = log->commit, *parent = log->parent;
51         int abbrev = opt->diffopt.abbrev;
52         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
53         const char *extra;
54         int len;
55         const char *subject = NULL, *extra_headers = opt->extra_headers;
57         opt->loginfo = NULL;
58         if (!opt->verbose_header) {
59                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
60                 if (opt->parents)
61                         show_parents(commit, abbrev_commit);
62                 putchar('\n');
63                 return;
64         }
66         /*
67          * The "oneline" format has several special cases:
68          *  - The pretty-printed commit lacks a newline at the end
69          *    of the buffer, but we do want to make sure that we
70          *    have a newline there. If the separator isn't already
71          *    a newline, add an extra one.
72          *  - unlike other log messages, the one-line format does
73          *    not have an empty line between entries.
74          */
75         extra = "";
76         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
77                 extra = "\n";
78         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
79                 putchar('\n');
80         opt->shown_one = 1;
82         /*
83          * Print header line of header..
84          */
86         if (opt->commit_format == CMIT_FMT_EMAIL) {
87                 char *sha1 = sha1_to_hex(commit->object.sha1);
88                 if (opt->total > 0) {
89                         static char buffer[64];
90                         snprintf(buffer, sizeof(buffer),
91                                         "Subject: [PATCH %d/%d] ",
92                                         opt->nr, opt->total);
93                         subject = buffer;
94                 } else if (opt->total == 0)
95                         subject = "Subject: [PATCH] ";
96                 else
97                         subject = "Subject: ";
99                 printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
100                 if (opt->mime_boundary) {
101                         static char subject_buffer[1024];
102                         static char buffer[1024];
103                         snprintf(subject_buffer, sizeof(subject_buffer) - 1,
104                                  "%s"
105                                  "MIME-Version: 1.0\n"
106                                  "Content-Type: multipart/mixed;\n"
107                                  " boundary=\"%s%s\"\n"
108                                  "\n"
109                                  "This is a multi-part message in MIME "
110                                  "format.\n"
111                                  "--%s%s\n"
112                                  "Content-Type: text/plain; "
113                                  "charset=UTF-8; format=fixed\n"
114                                  "Content-Transfer-Encoding: 8bit\n\n",
115                                  extra_headers ? extra_headers : "",
116                                  mime_boundary_leader, opt->mime_boundary,
117                                  mime_boundary_leader, opt->mime_boundary);
118                         extra_headers = subject_buffer;
120                         snprintf(buffer, sizeof(buffer) - 1,
121                                  "--%s%s\n"
122                                  "Content-Type: text/x-patch;\n"
123                                  " name=\"%s.diff\"\n"
124                                  "Content-Transfer-Encoding: 8bit\n"
125                                  "Content-Disposition: inline;\n"
126                                  " filename=\"%s.diff\"\n\n",
127                                  mime_boundary_leader, opt->mime_boundary,
128                                  sha1, sha1);
129                         opt->diffopt.stat_sep = buffer;
130                 }
131         } else {
132                 printf("%s%s%s",
133                        diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
134                        opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
135                        diff_unique_abbrev(commit->object.sha1, abbrev_commit));
136                 if (opt->parents)
137                         show_parents(commit, abbrev_commit);
138                 if (parent)
139                         printf(" (from %s)",
140                                diff_unique_abbrev(parent->object.sha1,
141                                                   abbrev_commit));
142                 printf("%s",
143                        diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
144                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
145         }
147         /*
148          * And then the pretty-printed message itself
149          */
150         len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header, sizeof(this_header), abbrev, subject, extra_headers);
152         if (opt->add_signoff)
153                 len = append_signoff(this_header, sizeof(this_header), len,
154                                      opt->add_signoff);
155         printf("%s%s%s", this_header, extra, sep);
158 int log_tree_diff_flush(struct rev_info *opt)
160         diffcore_std(&opt->diffopt);
162         if (diff_queue_is_empty()) {
163                 int saved_fmt = opt->diffopt.output_format;
164                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
165                 diff_flush(&opt->diffopt);
166                 opt->diffopt.output_format = saved_fmt;
167                 return 0;
168         }
170         if (opt->loginfo && !opt->no_commit_id) {
171                 /* When showing a verbose header (i.e. log message),
172                  * and not in --pretty=oneline format, we would want
173                  * an extra newline between the end of log and the
174                  * output for readability.
175                  */
176                 show_log(opt, opt->diffopt.msg_sep);
177                 if (opt->verbose_header &&
178                     opt->commit_format != CMIT_FMT_ONELINE) {
179                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
180                         if ((pch & opt->diffopt.output_format) == pch)
181                                 printf("---%c", opt->diffopt.line_termination);
182                         else
183                                 putchar(opt->diffopt.line_termination);
184                 }
185         }
186         diff_flush(&opt->diffopt);
187         return 1;
190 static int diff_root_tree(struct rev_info *opt,
191                           const unsigned char *new, const char *base)
193         int retval;
194         void *tree;
195         struct tree_desc empty, real;
197         tree = read_object_with_reference(new, tree_type, &real.size, NULL);
198         if (!tree)
199                 die("unable to read root tree (%s)", sha1_to_hex(new));
200         real.buf = tree;
202         empty.buf = "";
203         empty.size = 0;
204         retval = diff_tree(&empty, &real, base, &opt->diffopt);
205         free(tree);
206         log_tree_diff_flush(opt);
207         return retval;
210 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
212         unsigned const char *sha1 = commit->object.sha1;
214         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
215         return !opt->loginfo;
218 /*
219  * Show the diff of a commit.
220  *
221  * Return true if we printed any log info messages
222  */
223 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
225         int showed_log;
226         struct commit_list *parents;
227         unsigned const char *sha1 = commit->object.sha1;
229         if (!opt->diff)
230                 return 0;
232         /* Root commit? */
233         parents = commit->parents;
234         if (!parents) {
235                 if (opt->show_root_diff)
236                         diff_root_tree(opt, sha1, "");
237                 return !opt->loginfo;
238         }
240         /* More than one parent? */
241         if (parents && parents->next) {
242                 if (opt->ignore_merges)
243                         return 0;
244                 else if (opt->combine_merges)
245                         return do_diff_combined(opt, commit);
247                 /* If we show individual diffs, show the parent info */
248                 log->parent = parents->item;
249         }
251         showed_log = 0;
252         for (;;) {
253                 struct commit *parent = parents->item;
255                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
256                 log_tree_diff_flush(opt);
258                 showed_log |= !opt->loginfo;
260                 /* Set up the log info for the next parent, if any.. */
261                 parents = parents->next;
262                 if (!parents)
263                         break;
264                 log->parent = parents->item;
265                 opt->loginfo = log;
266         }
267         return showed_log;
270 int log_tree_commit(struct rev_info *opt, struct commit *commit)
272         struct log_info log;
273         int shown;
275         log.commit = commit;
276         log.parent = NULL;
277         opt->loginfo = &log;
279         shown = log_tree_diff(opt, commit, &log);
280         if (!shown && opt->loginfo && opt->always_show_header) {
281                 log.parent = NULL;
282                 show_log(opt, "");
283                 shown = 1;
284         }
285         opt->loginfo = NULL;
286         return shown;