builtin/merge-index.c

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