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-rw-r--r--builtin/merge-index.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/builtin/merge-index.c b/builtin/merge-index.c
new file mode 100644
index 0000000..2c4cf5e
--- /dev/null
+++ b/builtin/merge-index.c
@@ -0,0 +1,111 @@
+#include "cache.h"
+#include "run-command.h"
+#include "exec_cmd.h"
+
+static const char *pgm;
+static int one_shot, quiet;
+static int err;
+
+static int merge_entry(int pos, const char *path)
+{
+ int found;
+ const char *arguments[] = { pgm, "", "", "", path, "", "", "", NULL };
+ char hexbuf[4][60];
+ char ownbuf[4][60];
+
+ if (pos >= active_nr)
+ die("git merge-index: %s not in the cache", path);
+ found = 0;
+ do {
+ struct cache_entry *ce = active_cache[pos];
+ int stage = ce_stage(ce);
+
+ if (strcmp(ce->name, path))
+ break;
+ found++;
+ strcpy(hexbuf[stage], sha1_to_hex(ce->sha1));
+ sprintf(ownbuf[stage], "%o", ce->ce_mode);
+ arguments[stage] = hexbuf[stage];
+ arguments[stage + 4] = ownbuf[stage];
+ } while (++pos < active_nr);
+ if (!found)
+ die("git merge-index: %s not in the cache", path);
+
+ if (run_command_v_opt(arguments, 0)) {
+ if (one_shot)
+ err++;
+ else {
+ if (!quiet)
+ die("merge program failed");
+ exit(1);
+ }
+ }
+ return found;
+}
+
+static void merge_file(const char *path)
+{
+ int pos = cache_name_pos(path, strlen(path));
+
+ /*
+ * If it already exists in the cache as stage0, it's
+ * already merged and there is nothing to do.
+ */
+ if (pos < 0)
+ merge_entry(-pos-1, path);
+}
+
+static void merge_all(void)
+{
+ int i;
+ for (i = 0; i < active_nr; i++) {
+ struct cache_entry *ce = active_cache[i];
+ if (!ce_stage(ce))
+ continue;
+ i += merge_entry(i, ce->name)-1;
+ }
+}
+
+int cmd_merge_index(int argc, const char **argv, const char *prefix)
+{
+ int i, force_file = 0;
+
+ /* Without this we cannot rely on waitpid() to tell
+ * what happened to our children.
+ */
+ signal(SIGCHLD, SIG_DFL);
+
+ if (argc < 3)
+ usage("git merge-index [-o] [-q] <merge-program> (-a | [--] <filename>*)");
+
+ read_cache();
+
+ i = 1;
+ if (!strcmp(argv[i], "-o")) {
+ one_shot = 1;
+ i++;
+ }
+ if (!strcmp(argv[i], "-q")) {
+ quiet = 1;
+ i++;
+ }
+ pgm = argv[i++];
+ for (; i < argc; i++) {
+ const char *arg = argv[i];
+ if (!force_file && *arg == '-') {
+ if (!strcmp(arg, "--")) {
+ force_file = 1;
+ continue;
+ }
+ if (!strcmp(arg, "-a")) {
+ merge_all();
+ continue;
+ }
+ die("git merge-index: unknown option %s", arg);
+ }
+ merge_file(arg);
+ }
+ if (err && !quiet)
+ die("merge program failed");
+ return err;
+}