git-am: use printf instead of echo on user-supplied strings
[git/jrn.git] / builtin-rev-list.c
blobb86e7ca8b18c7d11886dd3a1b4ca0eba95af264a
1 #include "cache.h"
2 #include "refs.h"
3 #include "tag.h"
4 #include "commit.h"
5 #include "tree.h"
6 #include "blob.h"
7 #include "tree-walk.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "list-objects.h"
11 #include "builtin.h"
13 /* bits #0-15 in revision.h */
15 #define COUNTED (1u<<16)
17 static const char rev_list_usage[] =
18 "git-rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
19 " limiting output:\n"
20 " --max-count=nr\n"
21 " --max-age=epoch\n"
22 " --min-age=epoch\n"
23 " --sparse\n"
24 " --no-merges\n"
25 " --remove-empty\n"
26 " --all\n"
27 " --stdin\n"
28 " ordering output:\n"
29 " --topo-order\n"
30 " --date-order\n"
31 " formatting output:\n"
32 " --parents\n"
33 " --objects | --objects-edge\n"
34 " --unpacked\n"
35 " --header | --pretty\n"
36 " --abbrev=nr | --no-abbrev\n"
37 " --abbrev-commit\n"
38 " --left-right\n"
39 " special purpose:\n"
40 " --bisect"
43 static struct rev_info revs;
45 static int bisect_list;
46 static int show_timestamp;
47 static int hdr_termination;
48 static const char *header_prefix;
50 static void show_commit(struct commit *commit)
52 if (show_timestamp)
53 printf("%lu ", commit->date);
54 if (header_prefix)
55 fputs(header_prefix, stdout);
56 if (commit->object.flags & BOUNDARY)
57 putchar('-');
58 else if (revs.left_right) {
59 if (commit->object.flags & SYMMETRIC_LEFT)
60 putchar('<');
61 else
62 putchar('>');
64 if (revs.abbrev_commit && revs.abbrev)
65 fputs(find_unique_abbrev(commit->object.sha1, revs.abbrev),
66 stdout);
67 else
68 fputs(sha1_to_hex(commit->object.sha1), stdout);
69 if (revs.parents) {
70 struct commit_list *parents = commit->parents;
71 while (parents) {
72 struct object *o = &(parents->item->object);
73 parents = parents->next;
74 if (o->flags & TMP_MARK)
75 continue;
76 printf(" %s", sha1_to_hex(o->sha1));
77 o->flags |= TMP_MARK;
79 /* TMP_MARK is a general purpose flag that can
80 * be used locally, but the user should clean
81 * things up after it is done with them.
83 for (parents = commit->parents;
84 parents;
85 parents = parents->next)
86 parents->item->object.flags &= ~TMP_MARK;
88 if (revs.commit_format == CMIT_FMT_ONELINE)
89 putchar(' ');
90 else
91 putchar('\n');
93 if (revs.verbose_header) {
94 static char pretty_header[16384];
95 pretty_print_commit(revs.commit_format, commit, ~0,
96 pretty_header, sizeof(pretty_header),
97 revs.abbrev, NULL, NULL, revs.relative_date);
98 printf("%s%c", pretty_header, hdr_termination);
100 fflush(stdout);
101 if (commit->parents) {
102 free_commit_list(commit->parents);
103 commit->parents = NULL;
105 free(commit->buffer);
106 commit->buffer = NULL;
109 static void show_object(struct object_array_entry *p)
111 /* An object with name "foo\n0000000..." can be used to
112 * confuse downstream git-pack-objects very badly.
114 const char *ep = strchr(p->name, '\n');
115 if (ep) {
116 printf("%s %.*s\n", sha1_to_hex(p->item->sha1),
117 (int) (ep - p->name),
118 p->name);
120 else
121 printf("%s %s\n", sha1_to_hex(p->item->sha1), p->name);
124 static void show_edge(struct commit *commit)
126 printf("-%s\n", sha1_to_hex(commit->object.sha1));
130 * This is a truly stupid algorithm, but it's only
131 * used for bisection, and we just don't care enough.
133 * We care just barely enough to avoid recursing for
134 * non-merge entries.
136 static int count_distance(struct commit_list *entry)
138 int nr = 0;
140 while (entry) {
141 struct commit *commit = entry->item;
142 struct commit_list *p;
144 if (commit->object.flags & (UNINTERESTING | COUNTED))
145 break;
146 if (!revs.prune_fn || (commit->object.flags & TREECHANGE))
147 nr++;
148 commit->object.flags |= COUNTED;
149 p = commit->parents;
150 entry = p;
151 if (p) {
152 p = p->next;
153 while (p) {
154 nr += count_distance(p);
155 p = p->next;
160 return nr;
163 static void clear_distance(struct commit_list *list)
165 while (list) {
166 struct commit *commit = list->item;
167 commit->object.flags &= ~COUNTED;
168 list = list->next;
172 static struct commit_list *find_bisection(struct commit_list *list)
174 int nr, closest;
175 struct commit_list *p, *best;
177 nr = 0;
178 p = list;
179 while (p) {
180 if (!revs.prune_fn || (p->item->object.flags & TREECHANGE))
181 nr++;
182 p = p->next;
184 closest = -1;
185 best = list;
187 for (p = list; p; p = p->next) {
188 int distance;
190 if (revs.prune_fn && !(p->item->object.flags & TREECHANGE))
191 continue;
193 distance = count_distance(p);
194 clear_distance(list);
195 if (nr - distance < distance)
196 distance = nr - distance;
197 if (distance > closest) {
198 best = p;
199 closest = distance;
202 if (best)
203 best->next = NULL;
204 return best;
207 static void read_revisions_from_stdin(struct rev_info *revs)
209 char line[1000];
211 while (fgets(line, sizeof(line), stdin) != NULL) {
212 int len = strlen(line);
213 if (line[len - 1] == '\n')
214 line[--len] = 0;
215 if (!len)
216 break;
217 if (line[0] == '-')
218 die("options not supported in --stdin mode");
219 if (handle_revision_arg(line, revs, 0, 1))
220 die("bad revision '%s'", line);
224 int cmd_rev_list(int argc, const char **argv, const char *prefix)
226 struct commit_list *list;
227 int i;
228 int read_from_stdin = 0;
230 git_config(git_default_config);
231 init_revisions(&revs, prefix);
232 revs.abbrev = 0;
233 revs.commit_format = CMIT_FMT_UNSPECIFIED;
234 argc = setup_revisions(argc, argv, &revs, NULL);
236 for (i = 1 ; i < argc; i++) {
237 const char *arg = argv[i];
239 if (!strcmp(arg, "--header")) {
240 revs.verbose_header = 1;
241 continue;
243 if (!strcmp(arg, "--timestamp")) {
244 show_timestamp = 1;
245 continue;
247 if (!strcmp(arg, "--bisect")) {
248 bisect_list = 1;
249 continue;
251 if (!strcmp(arg, "--stdin")) {
252 if (read_from_stdin++)
253 die("--stdin given twice?");
254 read_revisions_from_stdin(&revs);
255 continue;
257 usage(rev_list_usage);
260 if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
261 /* The command line has a --pretty */
262 hdr_termination = '\n';
263 if (revs.commit_format == CMIT_FMT_ONELINE)
264 header_prefix = "";
265 else
266 header_prefix = "commit ";
268 else if (revs.verbose_header)
269 /* Only --header was specified */
270 revs.commit_format = CMIT_FMT_RAW;
272 list = revs.commits;
274 if ((!list &&
275 (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
276 !revs.pending.nr)) ||
277 revs.diff)
278 usage(rev_list_usage);
280 save_commit_buffer = revs.verbose_header || revs.grep_filter;
281 track_object_refs = 0;
282 if (bisect_list)
283 revs.limited = 1;
285 prepare_revision_walk(&revs);
286 if (revs.tree_objects)
287 mark_edges_uninteresting(revs.commits, &revs, show_edge);
289 if (bisect_list)
290 revs.commits = find_bisection(revs.commits);
292 traverse_commit_list(&revs, show_commit, show_object);
294 return 0;