added index caching
[git/mingw/4msysgit/wingit-dll.git] / merge-index.c
blobaa9cf23a39ae271a53d1a0c05ac99be0e832b46a
1 #include "cache.h"
2 #include "run-command.h"
3 #include "exec_cmd.h"
5 static const char *pgm;
6 static const char *arguments[9];
7 static int one_shot, quiet;
8 static int err;
10 static void run_program(void)
12 struct child_process child;
13 memset(&child, 0, sizeof(child));
14 child.argv = arguments;
15 if (run_command(&child)) {
16 if (one_shot) {
17 err++;
18 } else {
19 if (!quiet)
20 die("merge program failed");
21 exit(1);
26 static int merge_entry(int pos, const char *path)
28 int found;
30 if (pos >= active_nr)
31 die("git merge-index: %s not in the cache", path);
32 arguments[0] = pgm;
33 arguments[1] = "";
34 arguments[2] = "";
35 arguments[3] = "";
36 arguments[4] = path;
37 arguments[5] = "";
38 arguments[6] = "";
39 arguments[7] = "";
40 arguments[8] = NULL;
41 found = 0;
42 do {
43 static char hexbuf[4][60];
44 static char ownbuf[4][60];
45 struct cache_entry *ce = active_cache[pos];
46 int stage = ce_stage(ce);
48 if (strcmp(ce->name, path))
49 break;
50 found++;
51 strcpy(hexbuf[stage], sha1_to_hex(ce->sha1));
52 sprintf(ownbuf[stage], "%o", ce->ce_mode);
53 arguments[stage] = hexbuf[stage];
54 arguments[stage + 4] = ownbuf[stage];
55 } while (++pos < active_nr);
56 if (!found)
57 die("git merge-index: %s not in the cache", path);
58 run_program();
59 return found;
62 static void merge_file(const char *path)
64 int pos = cache_name_pos(path, strlen(path));
67 * If it already exists in the cache as stage0, it's
68 * already merged and there is nothing to do.
70 if (pos < 0)
71 merge_entry(-pos-1, path);
74 static void merge_all(void)
76 int i;
77 for (i = 0; i < active_nr; i++) {
78 struct cache_entry *ce = active_cache[i];
79 if (!ce_stage(ce))
80 continue;
81 i += merge_entry(i, ce->name)-1;
85 int main(int argc, char **argv)
87 int i, force_file = 0;
89 /* Without this we cannot rely on waitpid() to tell
90 * what happened to our children.
92 signal(SIGCHLD, SIG_DFL);
94 if (argc < 3)
95 usage("git merge-index [-o] [-q] <merge-program> (-a | [--] <filename>*)");
97 git_extract_argv0_path(argv[0]);
99 setup_git_directory();
100 read_cache();
102 i = 1;
103 if (!strcmp(argv[i], "-o")) {
104 one_shot = 1;
105 i++;
107 if (!strcmp(argv[i], "-q")) {
108 quiet = 1;
109 i++;
111 pgm = argv[i++];
112 for (; i < argc; i++) {
113 char *arg = argv[i];
114 if (!force_file && *arg == '-') {
115 if (!strcmp(arg, "--")) {
116 force_file = 1;
117 continue;
119 if (!strcmp(arg, "-a")) {
120 merge_all();
121 continue;
123 die("git merge-index: unknown option %s", arg);
125 merge_file(arg);
127 if (err && !quiet)
128 die("merge program failed");
129 return err;