merge-index.c

   1 #include "cache.h"
   2 #include "run-command.h"
   3
   4 static const char *pgm;
   5 static const char *arguments[9];
   6 static int one_shot, quiet;
   7 static int err;
   8
   9 static void run_program(void)
  10 {
  11         struct child_process child;
  12         memset(&child, 0, sizeof(child));
  13         child.argv = arguments;
  14         if (run_command(&child)) {
  15                 if (one_shot) {
  16                         err++;
  17                 } else {
  18                         if (!quiet)
  19                                 die("merge program failed");
  20                         exit(1);
  21                 }
  22         }
  23 }
  24
  25 static int merge_entry(int pos, const char *path)
  26 {
  27         int found;
  28
  29         if (pos >= active_nr)
  30                 die("git merge-index: %s not in the cache", path);
  31         arguments[0] = pgm;
  32         arguments[1] = "";
  33         arguments[2] = "";
  34         arguments[3] = "";
  35         arguments[4] = path;
  36         arguments[5] = "";
  37         arguments[6] = "";
  38         arguments[7] = "";
  39         arguments[8] = NULL;
  40         found = 0;
  41         do {
  42                 static char hexbuf[4][60];
  43                 static char ownbuf[4][60];
  44                 struct cache_entry *ce = active_cache[pos];
  45                 int stage = ce_stage(ce);
  46
  47                 if (strcmp(ce->name, path))
  48                         break;
  49                 found++;
  50                 strcpy(hexbuf[stage], sha1_to_hex(ce->sha1));
  51                 sprintf(ownbuf[stage], "%o", ce->ce_mode);
  52                 arguments[stage] = hexbuf[stage];
  53                 arguments[stage + 4] = ownbuf[stage];
  54         } while (++pos < active_nr);
  55         if (!found)
  56                 die("git merge-index: %s not in the cache", path);
  57         run_program();
  58         return found;
  59 }
  60
  61 static void merge_file(const char *path)
  62 {
  63         int pos = cache_name_pos(path, strlen(path));
  64
  65         /*
  66          * If it already exists in the cache as stage0, it's
  67          * already merged and there is nothing to do.
  68          */
  69         if (pos < 0)
  70                 merge_entry(-pos-1, path);
  71 }
  72
  73 static void merge_all(void)
  74 {
  75         int i;
  76         for (i = 0; i < active_nr; i++) {
  77                 struct cache_entry *ce = active_cache[i];
  78                 if (!ce_stage(ce))
  79                         continue;
  80                 i += merge_entry(i, ce->name)-1;
  81         }
  82 }
  83
  84 int main(int argc, char **argv)
  85 {
  86         int i, force_file = 0;
  87
  88         /* Without this we cannot rely on waitpid() to tell
  89          * what happened to our children.
  90          */
  91         signal(SIGCHLD, SIG_DFL);
  92
  93         if (argc < 3)
  94                 usage("git-merge-index [-o] [-q] <merge-program> (-a | [--] <filename>*)");
  95
  96         setup_git_directory();
  97         read_cache();
  98
  99         i = 1;
 100         if (!strcmp(argv[i], "-o")) {
 101                 one_shot = 1;
 102                 i++;
 103         }
 104         if (!strcmp(argv[i], "-q")) {
 105                 quiet = 1;
 106                 i++;
 107         }
 108         pgm = argv[i++];
 109         for (; i < argc; i++) {
 110                 char *arg = argv[i];
 111                 if (!force_file && *arg == '-') {
 112                         if (!strcmp(arg, "--")) {
 113                                 force_file = 1;
 114                                 continue;
 115                         }
 116                         if (!strcmp(arg, "-a")) {
 117                                 merge_all();
 118                                 continue;
 119                         }
 120                         die("git merge-index: unknown option %s", arg);
 121                 }
 122                 merge_file(arg);
 123         }
 124         if (err && !quiet)
 125                 die("merge program failed");
 126         return err;
 127 }