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-rw-r--r--merge-index.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/merge-index.c b/merge-index.c
new file mode 100644
index 0000000..727527f
--- /dev/null
+++ b/merge-index.c
@@ -0,0 +1,135 @@
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include "cache.h"
+
+static const char *pgm = NULL;
+static const char *arguments[8];
+static int one_shot, quiet;
+static int err;
+
+static void run_program(void)
+{
+ int pid = fork(), status;
+
+ if (pid < 0)
+ die("unable to fork");
+ if (!pid) {
+ execlp(pgm, arguments[0],
+ arguments[1],
+ arguments[2],
+ arguments[3],
+ arguments[4],
+ arguments[5],
+ arguments[6],
+ arguments[7],
+ NULL);
+ die("unable to execute '%s'", pgm);
+ }
+ if (waitpid(pid, &status, 0) < 0 || !WIFEXITED(status) || WEXITSTATUS(status)) {
+ if (one_shot) {
+ err++;
+ } else {
+ if (!quiet)
+ die("merge program failed");
+ exit(1);
+ }
+ }
+}
+
+static int merge_entry(int pos, const char *path)
+{
+ int found;
+
+ if (pos >= active_nr)
+ die("git-merge-index: %s not in the cache", path);
+ arguments[0] = pgm;
+ arguments[1] = "";
+ arguments[2] = "";
+ arguments[3] = "";
+ arguments[4] = path;
+ arguments[5] = "";
+ arguments[6] = "";
+ arguments[7] = "";
+ found = 0;
+ do {
+ static char hexbuf[4][60];
+ static char ownbuf[4][60];
+ 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", ntohl(ce->ce_mode) & (~S_IFMT));
+ 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);
+ run_program();
+ 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 main(int argc, char **argv)
+{
+ int i, force_file = 0;
+
+ 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++) {
+ 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;
+}