Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2
   3static const char *pgm;
   4static const char *arguments[8];
   5static int one_shot, quiet;
   6static int err;
   7
   8static void run_program(void)
   9{
  10        pid_t pid = fork();
  11        int status;
  12
  13        if (pid < 0)
  14                die("unable to fork");
  15        if (!pid) {
  16                execlp(pgm, arguments[0],
  17                            arguments[1],
  18                            arguments[2],
  19                            arguments[3],
  20                            arguments[4],
  21                            arguments[5],
  22                            arguments[6],
  23                            arguments[7],
  24                            NULL);
  25                die("unable to execute '%s'", pgm);
  26        }
  27        if (waitpid(pid, &status, 0) < 0 || !WIFEXITED(status) || WEXITSTATUS(status)) {
  28                if (one_shot) {
  29                        err++;
  30                } else {
  31                        if (!quiet)
  32                                die("merge program failed");
  33                        exit(1);
  34                }
  35        }
  36}
  37
  38static int merge_entry(int pos, const char *path)
  39{
  40        int found;
  41        
  42        if (pos >= active_nr)
  43                die("git-merge-index: %s not in the cache", path);
  44        arguments[0] = pgm;
  45        arguments[1] = "";
  46        arguments[2] = "";
  47        arguments[3] = "";
  48        arguments[4] = path;
  49        arguments[5] = "";
  50        arguments[6] = "";
  51        arguments[7] = "";
  52        found = 0;
  53        do {
  54                static char hexbuf[4][60];
  55                static char ownbuf[4][60];
  56                struct cache_entry *ce = active_cache[pos];
  57                int stage = ce_stage(ce);
  58
  59                if (strcmp(ce->name, path))
  60                        break;
  61                found++;
  62                strcpy(hexbuf[stage], sha1_to_hex(ce->sha1));
  63                sprintf(ownbuf[stage], "%o", ntohl(ce->ce_mode) & (~S_IFMT));
  64                arguments[stage] = hexbuf[stage];
  65                arguments[stage + 4] = ownbuf[stage];
  66        } while (++pos < active_nr);
  67        if (!found)
  68                die("git-merge-index: %s not in the cache", path);
  69        run_program();
  70        return found;
  71}
  72
  73static void merge_file(const char *path)
  74{
  75        int pos = cache_name_pos(path, strlen(path));
  76
  77        /*
  78         * If it already exists in the cache as stage0, it's
  79         * already merged and there is nothing to do.
  80         */
  81        if (pos < 0)
  82                merge_entry(-pos-1, path);
  83}
  84
  85static void merge_all(void)
  86{
  87        int i;
  88        for (i = 0; i < active_nr; i++) {
  89                struct cache_entry *ce = active_cache[i];
  90                if (!ce_stage(ce))
  91                        continue;
  92                i += merge_entry(i, ce->name)-1;
  93        }
  94}
  95
  96int main(int argc, char **argv)
  97{
  98        int i, force_file = 0;
  99
 100        /* Without this we cannot rely on waitpid() to tell
 101         * what happened to our children.
 102         */
 103        signal(SIGCHLD, SIG_DFL);
 104
 105        if (argc < 3)
 106                usage("git-merge-index [-o] [-q] <merge-program> (-a | <filename>*)");
 107
 108        setup_git_directory();
 109        read_cache();
 110
 111        i = 1;
 112        if (!strcmp(argv[i], "-o")) {
 113                one_shot = 1;
 114                i++;
 115        }
 116        if (!strcmp(argv[i], "-q")) {
 117                quiet = 1;
 118                i++;
 119        }
 120        pgm = argv[i++];
 121        for (; i < argc; i++) {
 122                char *arg = argv[i];
 123                if (!force_file && *arg == '-') {
 124                        if (!strcmp(arg, "--")) {
 125                                force_file = 1;
 126                                continue;
 127                        }
 128                        if (!strcmp(arg, "-a")) {
 129                                merge_all();
 130                                continue;
 131                        }
 132                        die("git-merge-index: unknown option %s", arg);
 133                }
 134                merge_file(arg);
 135        }
 136        if (err && !quiet)
 137                die("merge program failed");
 138        return err;
 139}