Code

[PATCH] read-tree: update documentation for 3-way merge.
[git.git] / rev-list.c
1 #include "cache.h"
2 #include "commit.h"
3 #include "epoch.h"
5 #define SEEN            (1u << 0)
6 #define INTERESTING     (1u << 1)
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 ]";
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;
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 }
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;
65         return DO;
66 }
68 static int process_commit(struct commit * commit)
69 {
70         int action=filter_commit(commit);
72         if (action == STOP) {
73                 return STOP;
74         }
76         if (action == CONTINUE) {
77                 return CONTINUE;
78         }
80         show_commit(commit);
82         return CONTINUE;
83 }
85 static void show_commit_list(struct commit_list *list)
86 {
87         while (list) {
88                 struct commit *commit = pop_most_recent_commit(&list, SEEN);
90                 if (process_commit(commit) == STOP)
91                         break;
92         }
93 }
95 static void mark_parents_uninteresting(struct commit *commit)
96 {
97         struct commit_list *parents = commit->parents;
99         while (parents) {
100                 struct commit *commit = parents->item;
101                 commit->object.flags |= UNINTERESTING;
102                 parents = parents->next;
103         }
106 static int everybody_uninteresting(struct commit_list *list)
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;
118 struct commit_list *limit_list(struct commit_list *list)
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;
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;
137 static enum cmit_fmt get_commit_format(const char *arg)
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 }                       
151 int main(int argc, char **argv)
153         struct commit_list *list = NULL;
154         int i, limited = 0;
156         for (i = 1 ; i < argc; i++) {
157                 int flags;
158                 char *arg = argv[i];
159                 unsigned char sha1[20];
160                 struct commit *commit;
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                 }
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         }
213         if (!list)
214                 usage(rev_list_usage);
216         if (!merge_order) {             
217         
218                 if (limited) 
219                         list = limit_list(list);
220                 show_commit_list(list);
221                         
222         } else {
223                 
224                 if (sort_list_in_merge_order(list, &process_commit)) {
225                           die("merge order sort failed\n");
226                 }
227                                         
228         }
230         return 0;