Make path-limiting be incremental when possible.

diff --git a/ls-tree.c b/ls-tree.c
index d585b6fc13f4b980fa237067157de96e8e7ef601..26258c3cf99c9eec522ea1a13a2ded3beb93e171 100644 (file)
--- a/ls-tree.c
+++ b/ls-tree.c
@@ -13,13 +13,14 @@ static int line_termination = '\n';
 #define LS_TREE_ONLY 2
 #define LS_SHOW_TREES 4
 #define LS_NAME_ONLY 8
+static int abbrev = 0;
 static int ls_options = 0;
 const char **pathspec;
 static int chomp_prefix = 0;
 static const char *prefix;
 
 static const char ls_tree_usage[] =
-       "git-ls-tree [-d] [-r] [-t] [-z] [--name-only] [--name-status] [--full-name] <tree-ish> [path...]";
+       "git-ls-tree [-d] [-r] [-t] [-z] [--name-only] [--name-status] [--full-name] [--abbrev[=<n>]] <tree-ish> [path...]";
 
 static int show_recursive(const char *base, int baselen, const char *pathname)
 {
@@ -73,7 +74,9 @@ static int show_tree(unsigned char *sha1, const char *base, int baselen,
                return 0;
 
        if (!(ls_options & LS_NAME_ONLY))
-               printf("%06o %s %s\t", mode, type, sha1_to_hex(sha1));
+               printf("%06o %s %s\t", mode, type,
+                               abbrev ? find_unique_abbrev(sha1,abbrev)
+                                       : sha1_to_hex(sha1));
        write_name_quoted(base + chomp_prefix, baselen - chomp_prefix,
                          pathname,
                          line_termination, stdout);
@@ -84,10 +87,10 @@ static int show_tree(unsigned char *sha1, const char *base, int baselen,
 int main(int argc, const char **argv)
 {
        unsigned char sha1[20];
-       char *buf;
-       unsigned long size;
+       struct tree *tree;
 
        prefix = setup_git_directory();
+       git_config(git_default_config);
        if (prefix && *prefix)
                chomp_prefix = strlen(prefix);
        while (1 < argc && argv[1][0] == '-') {
@@ -114,6 +117,18 @@ int main(int argc, const char **argv)
                                chomp_prefix = 0;
                                break;
                        }
+                       if (!strncmp(argv[1]+2, "abbrev=",7)) {
+                               abbrev = strtoul(argv[1]+9, NULL, 10);
+                               if (abbrev && abbrev < MINIMUM_ABBREV)
+                                       abbrev = MINIMUM_ABBREV;
+                               else if (abbrev > 40)
+                                       abbrev = 40;
+                               break;
+                       }
+                       if (!strcmp(argv[1]+2, "abbrev")) {
+                               abbrev = DEFAULT_ABBREV;
+                               break;
+                       }
                        /* otherwise fallthru */
                default:
                        usage(ls_tree_usage);
@@ -131,10 +146,10 @@ int main(int argc, const char **argv)
                usage(ls_tree_usage);
 
        pathspec = get_pathspec(prefix, argv + 2);
-       buf = read_object_with_reference(sha1, "tree", &size, NULL);
-       if (!buf)
+       tree = parse_tree_indirect(sha1);
+       if (!tree)
                die("not a tree object");
-       read_tree_recursive(buf, size, "", 0, 0, pathspec, show_tree);
+       read_tree_recursive(tree, "", 0, 0, pathspec, show_tree);
 
        return 0;
 }