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1 | #include "cache.h" | |
2 | #include "diff.h" | |
3 | #include "commit.h" | |
4 | #include "log-tree.h" | |
5 | ||
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 | } | |
14 | ||
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; | |
20 | ||
21 | /* Do we have enough space to add it? */ | |
22 | if (buf_sz - at <= strlen(signed_off_by) + signoff_len + 3) | |
23 | return at; | |
24 | ||
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 | } | |
36 | ||
37 | /* Does the last line already end with "^[-A-Za-z]+: [^@]+@"? | |
38 | * If not, add a blank line to separate the message from | |
39 | * the run of Signed-off-by: and Acked-by: lines. | |
40 | */ | |
41 | { | |
42 | char ch; | |
43 | int seen_colon, seen_at, seen_name, seen_head, not_signoff; | |
44 | seen_colon = 0; | |
45 | seen_at = 0; | |
46 | seen_name = 0; | |
47 | seen_head = 0; | |
48 | not_signoff = 0; | |
49 | cp = buf + at; | |
50 | while (buf <= --cp && (ch = *cp) == '\n') | |
51 | ; | |
52 | while (!not_signoff && buf <= cp && (ch = *cp--) != '\n') { | |
53 | if (!seen_at) { | |
54 | if (ch == '@') | |
55 | seen_at = 1; | |
56 | continue; | |
57 | } | |
58 | if (!seen_colon) { | |
59 | if (ch == '@') | |
60 | not_signoff = 1; | |
61 | else if (ch == ':') | |
62 | seen_colon = 1; | |
63 | else | |
64 | seen_name = 1; | |
65 | continue; | |
66 | } | |
67 | if (('A' <= ch && ch <= 'Z') || | |
68 | ('a' <= ch && ch <= 'z') || | |
69 | ch == '-') { | |
70 | seen_head = 1; | |
71 | continue; | |
72 | } | |
73 | not_signoff = 1; | |
74 | } | |
75 | if (not_signoff || !seen_head || !seen_name) | |
76 | buf[at++] = '\n'; | |
77 | } | |
78 | ||
79 | strcpy(buf + at, signed_off_by); | |
80 | at += strlen(signed_off_by); | |
81 | strcpy(buf + at, signoff); | |
82 | at += signoff_len; | |
83 | buf[at++] = '\n'; | |
84 | buf[at] = 0; | |
85 | return at; | |
86 | } | |
87 | ||
88 | void show_log(struct rev_info *opt, const char *sep) | |
89 | { | |
90 | static char this_header[16384]; | |
91 | struct log_info *log = opt->loginfo; | |
92 | struct commit *commit = log->commit, *parent = log->parent; | |
93 | int abbrev = opt->diffopt.abbrev; | |
94 | int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40; | |
95 | const char *extra; | |
96 | int len; | |
97 | const char *subject = NULL, *extra_headers = opt->extra_headers; | |
98 | ||
99 | opt->loginfo = NULL; | |
100 | if (!opt->verbose_header) { | |
101 | fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout); | |
102 | if (opt->parents) | |
103 | show_parents(commit, abbrev_commit); | |
104 | putchar(opt->diffopt.line_termination); | |
105 | return; | |
106 | } | |
107 | ||
108 | /* | |
109 | * The "oneline" format has several special cases: | |
110 | * - The pretty-printed commit lacks a newline at the end | |
111 | * of the buffer, but we do want to make sure that we | |
112 | * have a newline there. If the separator isn't already | |
113 | * a newline, add an extra one. | |
114 | * - unlike other log messages, the one-line format does | |
115 | * not have an empty line between entries. | |
116 | */ | |
117 | extra = ""; | |
118 | if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE) | |
119 | extra = "\n"; | |
120 | if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE) | |
121 | putchar('\n'); | |
122 | opt->shown_one = 1; | |
123 | ||
124 | /* | |
125 | * Print header line of header.. | |
126 | */ | |
127 | ||
128 | if (opt->commit_format == CMIT_FMT_EMAIL) { | |
129 | char *sha1 = sha1_to_hex(commit->object.sha1); | |
130 | if (opt->total > 0) { | |
131 | static char buffer[64]; | |
132 | snprintf(buffer, sizeof(buffer), | |
133 | "Subject: [PATCH %d/%d] ", | |
134 | opt->nr, opt->total); | |
135 | subject = buffer; | |
136 | } else if (opt->total == 0) | |
137 | subject = "Subject: [PATCH] "; | |
138 | else | |
139 | subject = "Subject: "; | |
140 | ||
141 | printf("From %s Mon Sep 17 00:00:00 2001\n", sha1); | |
142 | if (opt->message_id) | |
143 | printf("Message-Id: <%s>\n", opt->message_id); | |
144 | if (opt->ref_message_id) | |
145 | printf("In-Reply-To: <%s>\nReferences: <%s>\n", | |
146 | opt->ref_message_id, opt->ref_message_id); | |
147 | if (opt->mime_boundary) { | |
148 | static char subject_buffer[1024]; | |
149 | static char buffer[1024]; | |
150 | snprintf(subject_buffer, sizeof(subject_buffer) - 1, | |
151 | "%s" | |
152 | "MIME-Version: 1.0\n" | |
153 | "Content-Type: multipart/mixed;\n" | |
154 | " boundary=\"%s%s\"\n" | |
155 | "\n" | |
156 | "This is a multi-part message in MIME " | |
157 | "format.\n" | |
158 | "--%s%s\n" | |
159 | "Content-Type: text/plain; " | |
160 | "charset=UTF-8; format=fixed\n" | |
161 | "Content-Transfer-Encoding: 8bit\n\n", | |
162 | extra_headers ? extra_headers : "", | |
163 | mime_boundary_leader, opt->mime_boundary, | |
164 | mime_boundary_leader, opt->mime_boundary); | |
165 | extra_headers = subject_buffer; | |
166 | ||
167 | snprintf(buffer, sizeof(buffer) - 1, | |
168 | "--%s%s\n" | |
169 | "Content-Type: text/x-patch;\n" | |
170 | " name=\"%s.diff\"\n" | |
171 | "Content-Transfer-Encoding: 8bit\n" | |
172 | "Content-Disposition: inline;\n" | |
173 | " filename=\"%s.diff\"\n\n", | |
174 | mime_boundary_leader, opt->mime_boundary, | |
175 | sha1, sha1); | |
176 | opt->diffopt.stat_sep = buffer; | |
177 | } | |
178 | } else { | |
179 | printf("%s%s%s", | |
180 | diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT), | |
181 | opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ", | |
182 | diff_unique_abbrev(commit->object.sha1, abbrev_commit)); | |
183 | if (opt->parents) | |
184 | show_parents(commit, abbrev_commit); | |
185 | if (parent) | |
186 | printf(" (from %s)", | |
187 | diff_unique_abbrev(parent->object.sha1, | |
188 | abbrev_commit)); | |
189 | printf("%s", | |
190 | diff_get_color(opt->diffopt.color_diff, DIFF_RESET)); | |
191 | putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n'); | |
192 | } | |
193 | ||
194 | /* | |
195 | * And then the pretty-printed message itself | |
196 | */ | |
197 | len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header, sizeof(this_header), abbrev, subject, extra_headers); | |
198 | ||
199 | if (opt->add_signoff) | |
200 | len = append_signoff(this_header, sizeof(this_header), len, | |
201 | opt->add_signoff); | |
202 | printf("%s%s%s", this_header, extra, sep); | |
203 | } | |
204 | ||
205 | int log_tree_diff_flush(struct rev_info *opt) | |
206 | { | |
207 | diffcore_std(&opt->diffopt); | |
208 | ||
209 | if (diff_queue_is_empty()) { | |
210 | int saved_fmt = opt->diffopt.output_format; | |
211 | opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT; | |
212 | diff_flush(&opt->diffopt); | |
213 | opt->diffopt.output_format = saved_fmt; | |
214 | return 0; | |
215 | } | |
216 | ||
217 | if (opt->loginfo && !opt->no_commit_id) { | |
218 | /* When showing a verbose header (i.e. log message), | |
219 | * and not in --pretty=oneline format, we would want | |
220 | * an extra newline between the end of log and the | |
221 | * output for readability. | |
222 | */ | |
223 | show_log(opt, opt->diffopt.msg_sep); | |
224 | if (opt->verbose_header && | |
225 | opt->commit_format != CMIT_FMT_ONELINE) { | |
226 | int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH; | |
227 | if ((pch & opt->diffopt.output_format) == pch) | |
228 | printf("---%c", opt->diffopt.line_termination); | |
229 | else | |
230 | putchar(opt->diffopt.line_termination); | |
231 | } | |
232 | } | |
233 | diff_flush(&opt->diffopt); | |
234 | return 1; | |
235 | } | |
236 | ||
237 | static int diff_root_tree(struct rev_info *opt, | |
238 | const unsigned char *new, const char *base) | |
239 | { | |
240 | int retval; | |
241 | void *tree; | |
242 | struct tree_desc empty, real; | |
243 | ||
244 | tree = read_object_with_reference(new, tree_type, &real.size, NULL); | |
245 | if (!tree) | |
246 | die("unable to read root tree (%s)", sha1_to_hex(new)); | |
247 | real.buf = tree; | |
248 | ||
249 | empty.buf = ""; | |
250 | empty.size = 0; | |
251 | retval = diff_tree(&empty, &real, base, &opt->diffopt); | |
252 | free(tree); | |
253 | log_tree_diff_flush(opt); | |
254 | return retval; | |
255 | } | |
256 | ||
257 | static int do_diff_combined(struct rev_info *opt, struct commit *commit) | |
258 | { | |
259 | unsigned const char *sha1 = commit->object.sha1; | |
260 | ||
261 | diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt); | |
262 | return !opt->loginfo; | |
263 | } | |
264 | ||
265 | /* | |
266 | * Show the diff of a commit. | |
267 | * | |
268 | * Return true if we printed any log info messages | |
269 | */ | |
270 | static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log) | |
271 | { | |
272 | int showed_log; | |
273 | struct commit_list *parents; | |
274 | unsigned const char *sha1 = commit->object.sha1; | |
275 | ||
276 | if (!opt->diff) | |
277 | return 0; | |
278 | ||
279 | /* Root commit? */ | |
280 | parents = commit->parents; | |
281 | if (!parents) { | |
282 | if (opt->show_root_diff) | |
283 | diff_root_tree(opt, sha1, ""); | |
284 | return !opt->loginfo; | |
285 | } | |
286 | ||
287 | /* More than one parent? */ | |
288 | if (parents && parents->next) { | |
289 | if (opt->ignore_merges) | |
290 | return 0; | |
291 | else if (opt->combine_merges) | |
292 | return do_diff_combined(opt, commit); | |
293 | ||
294 | /* If we show individual diffs, show the parent info */ | |
295 | log->parent = parents->item; | |
296 | } | |
297 | ||
298 | showed_log = 0; | |
299 | for (;;) { | |
300 | struct commit *parent = parents->item; | |
301 | ||
302 | diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt); | |
303 | log_tree_diff_flush(opt); | |
304 | ||
305 | showed_log |= !opt->loginfo; | |
306 | ||
307 | /* Set up the log info for the next parent, if any.. */ | |
308 | parents = parents->next; | |
309 | if (!parents) | |
310 | break; | |
311 | log->parent = parents->item; | |
312 | opt->loginfo = log; | |
313 | } | |
314 | return showed_log; | |
315 | } | |
316 | ||
317 | int log_tree_commit(struct rev_info *opt, struct commit *commit) | |
318 | { | |
319 | struct log_info log; | |
320 | int shown; | |
321 | ||
322 | log.commit = commit; | |
323 | log.parent = NULL; | |
324 | opt->loginfo = &log; | |
325 | ||
326 | shown = log_tree_diff(opt, commit, &log); | |
327 | if (!shown && opt->loginfo && opt->always_show_header) { | |
328 | log.parent = NULL; | |
329 | show_log(opt, ""); | |
330 | shown = 1; | |
331 | } | |
332 | opt->loginfo = NULL; | |
333 | return shown; | |
334 | } |