Cleanup variables in cat-file

I want to add new command line options to cat-file, but
to do that we need to change how we handle argv[] first.
This is a simple cleanup that assigns names to the two
arguments we currently care about.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/builtin-cat-file.c b/builtin-cat-file.c
index d61d3d5b74ae23bb1ab10b23f518fa7a85ac5481..f132d583d3e2a2ac0fe696b66723c846902d0a19 100644 (file)
--- a/builtin-cat-file.c
+++ b/builtin-cat-file.c
@@ -83,17 +83,21 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
        void *buf;
        unsigned long size;
        int opt;
+       const char *exp_type, *obj_name;
 
        git_config(git_default_config);
        if (argc != 3)
                usage("git-cat-file [-t|-s|-e|-p|<type>] <sha1>");
-       if (get_sha1(argv[2], sha1))
-               die("Not a valid object name %s", argv[2]);
+       exp_type = argv[1];
+       obj_name = argv[2];
+
+       if (get_sha1(obj_name, sha1))
+               die("Not a valid object name %s", obj_name);
 
        opt = 0;
-       if ( argv[1][0] == '-' ) {
-               opt = argv[1][1];
-               if ( !opt || argv[1][2] )
+       if ( exp_type[0] == '-' ) {
+               opt = exp_type[1];
+               if ( !opt || exp_type[2] )
                        opt = -1; /* Not a single character option */
        }
 
@@ -121,15 +125,17 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
        case 'p':
                type = sha1_object_info(sha1, NULL);
                if (type < 0)
-                       die("Not a valid object name %s", argv[2]);
+                       die("Not a valid object name %s", obj_name);
 
                /* custom pretty-print here */
-               if (type == OBJ_TREE)
-                       return cmd_ls_tree(2, argv + 1, NULL);
+               if (type == OBJ_TREE) {
+                       const char *ls_args[3] = {"ls-tree", obj_name, NULL};
+                       return cmd_ls_tree(2, ls_args, NULL);
+               }
 
                buf = read_sha1_file(sha1, &type, &size);
                if (!buf)
-                       die("Cannot read object %s", argv[2]);
+                       die("Cannot read object %s", obj_name);
                if (type == OBJ_TAG) {
                        pprint_tag(sha1, buf, size);
                        return 0;
@@ -138,15 +144,15 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
                /* otherwise just spit out the data */
                break;
        case 0:
-               buf = read_object_with_reference(sha1, argv[1], &size, NULL);
+               buf = read_object_with_reference(sha1, exp_type, &size, NULL);
                break;
 
        default:
-               die("git-cat-file: unknown option: %s\n", argv[1]);
+               die("git-cat-file: unknown option: %s\n", exp_type);
        }
 
        if (!buf)
-               die("git-cat-file %s: bad file", argv[2]);
+               die("git-cat-file %s: bad file", obj_name);
 
        write_or_die(1, buf, size);
        return 0;