b526ad4e0d773066ee9cfa6c233b802ced468d2d
[git/git.git] / rev-list.c
1 #include "cache.h"
2 #include "commit.h"
3 #include "epoch.h"
4
5 #define SEEN (1u << 0)
6 #define INTERESTING (1u << 1)
7
8 static const char rev_list_usage[] =
9 "usage: git-rev-list [OPTION] commit-id <commit-id>\n"
10 " --max-count=nr\n"
11 " --max-age=epoch\n"
12 " --min-age=epoch\n"
13 " --header\n"
14 " --pretty\n"
15 " --merge-order [ --show-breaks ]";
16
17 static int verbose_header = 0;
18 static int show_parents = 0;
19 static int hdr_termination = 0;
20 static const char *prefix = "";
21 static unsigned long max_age = -1;
22 static unsigned long min_age = -1;
23 static int max_count = -1;
24 static enum cmit_fmt commit_format = CMIT_FMT_RAW;
25 static int merge_order = 0;
26 static int show_breaks = 0;
27
28 static void show_commit(struct commit *commit)
29 {
30 if (show_breaks) {
31 prefix = "| ";
32 if (commit->object.flags & DISCONTINUITY) {
33 prefix = "^ ";
34 } else if (commit->object.flags & BOUNDARY) {
35 prefix = "= ";
36 }
37 }
38 printf("%s%s", prefix, sha1_to_hex(commit->object.sha1));
39 if (show_parents) {
40 struct commit_list *parents = commit->parents;
41 while (parents) {
42 printf(" %s", sha1_to_hex(parents->item->object.sha1));
43 parents = parents->next;
44 }
45 }
46 putchar('\n');
47 if (verbose_header) {
48 static char pretty_header[16384];
49 pretty_print_commit(commit_format, commit->buffer, ~0, pretty_header, sizeof(pretty_header));
50 printf("%s%c", pretty_header, hdr_termination);
51 }
52 }
53
54 static int filter_commit(struct commit * commit)
55 {
56 if (commit->object.flags & UNINTERESTING)
57 return CONTINUE;
58 if (min_age != -1 && (commit->date > min_age))
59 return CONTINUE;
60 if (max_age != -1 && (commit->date < max_age))
61 return STOP;
62 if (max_count != -1 && !max_count--)
63 return STOP;
64
65 return DO;
66 }
67
68 static int process_commit(struct commit * commit)
69 {
70 int action=filter_commit(commit);
71
72 if (action == STOP) {
73 return STOP;
74 }
75
76 if (action == CONTINUE) {
77 return CONTINUE;
78 }
79
80 show_commit(commit);
81
82 return CONTINUE;
83 }
84
85 static void show_commit_list(struct commit_list *list)
86 {
87 while (list) {
88 struct commit *commit = pop_most_recent_commit(&list, SEEN);
89
90 if (process_commit(commit) == STOP)
91 break;
92 }
93 }
94
95 static void mark_parents_uninteresting(struct commit *commit)
96 {
97 struct commit_list *parents = commit->parents;
98
99 while (parents) {
100 struct commit *commit = parents->item;
101 commit->object.flags |= UNINTERESTING;
102 parents = parents->next;
103 }
104 }
105
106 static int everybody_uninteresting(struct commit_list *list)
107 {
108 while (list) {
109 struct commit *commit = list->item;
110 list = list->next;
111 if (commit->object.flags & UNINTERESTING)
112 continue;
113 return 0;
114 }
115 return 1;
116 }
117
118 struct commit_list *limit_list(struct commit_list *list)
119 {
120 struct commit_list *newlist = NULL;
121 struct commit_list **p = &newlist;
122 do {
123 struct commit *commit = pop_most_recent_commit(&list, SEEN);
124 struct object *obj = &commit->object;
125
126 if (obj->flags & UNINTERESTING) {
127 mark_parents_uninteresting(commit);
128 if (everybody_uninteresting(list))
129 break;
130 continue;
131 }
132 p = &commit_list_insert(commit, p)->next;
133 } while (list);
134 return newlist;
135 }
136
137 static enum cmit_fmt get_commit_format(const char *arg)
138 {
139 if (!*arg)
140 return CMIT_FMT_DEFAULT;
141 if (!strcmp(arg, "=raw"))
142 return CMIT_FMT_RAW;
143 if (!strcmp(arg, "=medium"))
144 return CMIT_FMT_MEDIUM;
145 if (!strcmp(arg, "=short"))
146 return CMIT_FMT_SHORT;
147 usage(rev_list_usage);
148 }
149
150
151 int main(int argc, char **argv)
152 {
153 struct commit_list *list = NULL;
154 int i, limited = 0;
155
156 for (i = 1 ; i < argc; i++) {
157 int flags;
158 char *arg = argv[i];
159 unsigned char sha1[20];
160 struct commit *commit;
161
162 if (!strncmp(arg, "--max-count=", 12)) {
163 max_count = atoi(arg + 12);
164 continue;
165 }
166 if (!strncmp(arg, "--max-age=", 10)) {
167 max_age = atoi(arg + 10);
168 continue;
169 }
170 if (!strncmp(arg, "--min-age=", 10)) {
171 min_age = atoi(arg + 10);
172 continue;
173 }
174 if (!strcmp(arg, "--header")) {
175 verbose_header = 1;
176 continue;
177 }
178 if (!strncmp(arg, "--pretty", 8)) {
179 commit_format = get_commit_format(arg+8);
180 verbose_header = 1;
181 hdr_termination = '\n';
182 prefix = "commit ";
183 continue;
184 }
185 if (!strcmp(arg, "--parents")) {
186 show_parents = 1;
187 continue;
188 }
189 if (!strncmp(arg, "--merge-order", 13)) {
190 merge_order = 1;
191 continue;
192 }
193 if (!strncmp(arg, "--show-breaks", 13)) {
194 show_breaks = 1;
195 continue;
196 }
197
198 flags = 0;
199 if (*arg == '^') {
200 flags = UNINTERESTING;
201 arg++;
202 limited = 1;
203 }
204 if (get_sha1(arg, sha1) || (show_breaks && !merge_order))
205 usage(rev_list_usage);
206 commit = lookup_commit_reference(sha1);
207 if (!commit || parse_commit(commit) < 0)
208 die("bad commit object %s", arg);
209 commit->object.flags |= flags;
210 commit_list_insert(commit, &list);
211 }
212
213 if (!list)
214 usage(rev_list_usage);
215
216 if (!merge_order) {
217 if (limited)
218 list = limit_list(list);
219 show_commit_list(list);
220 } else {
221 if (sort_list_in_merge_order(list, &process_commit)) {
222 die("merge order sort failed\n");
223 }
224 }
225
226 return 0;
227 }