send-pack/receive-pack: allow errors to be reported back to pusher.

diff --git a/cat-file.c b/cat-file.c
index 3c47d79a16305d326a65768fe9f37ee25928510b..96d66b43043ee1e2381bfb80bb2bc1c7063ecc38 100644 (file)
--- a/cat-file.c
+++ b/cat-file.c
@@ -11,32 +11,58 @@ int main(int argc, char **argv)
        char type[20];
        void *buf;
        unsigned long size;
+       int opt;
 
-       if (argc != 3 || get_sha1_hex(argv[2], sha1))
-               usage("cat-file [-t | tagname] <sha1>");
-       buf = read_sha1_file(sha1, type, &size);
-       if (!buf)
-               die("cat-file %s: bad file", argv[2]);
-       if (!strcmp("-t", argv[1])) {
-               buf = type;
-               size = strlen(type);
-               type[size] = '\n';
-               size++;
-       } else if (strcmp(type, argv[1])) {
-               die("cat-file %s: bad tag", argv[2]);
+       setup_git_directory();
+       if (argc != 3 || get_sha1(argv[2], sha1))
+               usage("git-cat-file [-t|-s|-e|<type>] <sha1>");
+
+       opt = 0;
+       if ( argv[1][0] == '-' ) {
+               opt = argv[1][1];
+               if ( !opt || argv[1][2] )
+                       opt = -1; /* Not a single character option */
+       }
+
+       buf = NULL;
+       switch (opt) {
+       case 't':
+               if (!sha1_object_info(sha1, type, NULL)) {
+                       printf("%s\n", type);
+                       return 0;
+               }
+               break;
+
+       case 's':
+               if (!sha1_object_info(sha1, type, &size)) {
+                       printf("%lu\n", size);
+                       return 0;
+               }
+               break;
+
+       case 'e':
+               return !has_sha1_file(sha1);
+
+       case 0:
+               buf = read_object_with_reference(sha1, argv[1], &size, NULL);
+               break;
+
+       default:
+               die("git-cat-file: unknown option: %s\n", argv[1]);
        }
 
+       if (!buf)
+               die("git-cat-file %s: bad file", argv[2]);
+
        while (size > 0) {
-               long ret = write(1, buf, size);
+               long ret = xwrite(1, buf, size);
                if (ret < 0) {
-                       if (errno == EAGAIN)
-                               continue;
                        /* Ignore epipe */
                        if (errno == EPIPE)
                                break;
-                       die("cat-file: %s", strerror(errno));
+                       die("git-cat-file: %s", strerror(errno));
                } else if (!ret) {
-                       die("cat-file: disk full?");
+                       die("git-cat-file: disk full?");
                }
                size -= ret;
                buf += ret;