git-branch -D: make it work even when on a yet-to-be-born branch

diff --git a/index-pack.c b/index-pack.c
index b37dd787296e908b843049a660e3e0f5cd80e01e..8331d99a62a457cb341a834792aedf5de9c5625f 100644 (file)
--- a/index-pack.c
+++ b/index-pack.c
@@ -90,7 +90,7 @@ static SHA_CTX input_ctx;
 static int input_fd, output_fd, mmap_fd;
 
 /* Discard current buffer used content. */
-static void flush()
+static void flush(void)
 {
        if (input_offset) {
                if (output_fd >= 0)
@@ -757,6 +757,7 @@ static void final(const char *final_pack_name, const char *curr_pack_name,
                  const char *keep_name, const char *keep_msg,
                  unsigned char *sha1)
 {
+       char *report = "pack";
        char name[PATH_MAX];
        int err;
 
@@ -767,18 +768,6 @@ static void final(const char *final_pack_name, const char *curr_pack_name,
                if (err)
                        die("error while closing pack file: %s", strerror(errno));
                chmod(curr_pack_name, 0444);
-
-               /*
-                * Let's just mimic git-unpack-objects here and write
-                * the last part of the buffer to stdout.
-                */
-               while (input_len) {
-                       err = xwrite(1, input_buffer + input_offset, input_len);
-                       if (err <= 0)
-                               break;
-                       input_len -= err;
-                       input_offset += err;
-               }
        }
 
        if (keep_msg) {
@@ -788,14 +777,18 @@ static void final(const char *final_pack_name, const char *curr_pack_name,
                                 get_object_directory(), sha1_to_hex(sha1));
                        keep_name = name;
                }
-               keep_fd = open(keep_name, O_RDWR | O_CREAT, 0600);
-               if (keep_fd < 0)
-                       die("cannot write keep file");
-               if (keep_msg_len > 0) {
-                       write_or_die(keep_fd, keep_msg, keep_msg_len);
-                       write_or_die(keep_fd, "\n", 1);
+               keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600);
+               if (keep_fd < 0) {
+                       if (errno != EEXIST)
+                               die("cannot write keep file");
+               } else {
+                       if (keep_msg_len > 0) {
+                               write_or_die(keep_fd, keep_msg, keep_msg_len);
+                               write_or_die(keep_fd, "\n", 1);
+                       }
+                       close(keep_fd);
+                       report = "keep";
                }
-               close(keep_fd);
        }
 
        if (final_pack_name != curr_pack_name) {
@@ -818,6 +811,27 @@ static void final(const char *final_pack_name, const char *curr_pack_name,
                if (move_temp_to_file(curr_index_name, final_index_name))
                        die("cannot store index file");
        }
+
+       if (!from_stdin) {
+               printf("%s\n", sha1_to_hex(sha1));
+       } else {
+               char buf[48];
+               int len = snprintf(buf, sizeof(buf), "%s\t%s\n",
+                                  report, sha1_to_hex(sha1));
+               xwrite(1, buf, len);
+
+               /*
+                * Let's just mimic git-unpack-objects here and write
+                * the last part of the input buffer to stdout.
+                */
+               while (input_len) {
+                       err = xwrite(1, input_buffer + input_offset, input_len);
+                       if (err <= 0)
+                               break;
+                       input_len -= err;
+                       input_offset += err;
+               }
+       }
 }
 
 int main(int argc, char **argv)
@@ -841,6 +855,19 @@ int main(int argc, char **argv)
                                keep_msg = "";
                        } else if (!strncmp(arg, "--keep=", 7)) {
                                keep_msg = arg + 7;
+                       } else if (!strncmp(arg, "--pack_header=", 14)) {
+                               struct pack_header *hdr;
+                               char *c;
+
+                               hdr = (struct pack_header *)input_buffer;
+                               hdr->hdr_signature = htonl(PACK_SIGNATURE);
+                               hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10));
+                               if (*c != ',')
+                                       die("bad %s", arg);
+                               hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10));
+                               if (*c)
+                                       die("bad %s", arg);
+                               input_len = sizeof(*hdr);
                        } else if (!strcmp(arg, "-v")) {
                                verbose = 1;
                        } else if (!strcmp(arg, "-o")) {
@@ -921,8 +948,5 @@ int main(int argc, char **argv)
        free(index_name_buf);
        free(keep_name_buf);
 
-       if (!from_stdin)
-               printf("%s\n", sha1_to_hex(sha1));
-
        return 0;
 }