diff options
Diffstat (limited to 'builtin-replace.c')
| -rw-r--r-- | builtin-replace.c | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/builtin-replace.c b/builtin-replace.c index b5c40aa22a..e3767b9661 100644 --- a/builtin-replace.c +++ b/builtin-replace.c @@ -14,6 +14,7 @@ #include "parse-options.h" static const char * const git_replace_usage[] = { + "git replace [-f] <object> <replacement>", "git replace -d <object>...", "git replace -l [<pattern>]", NULL @@ -77,12 +78,46 @@ static int delete_replace_ref(const char *name, const char *ref, return 0; } +static int replace_object(const char *object_ref, const char *replace_ref, + int force) +{ + unsigned char object[20], prev[20], repl[20]; + char ref[PATH_MAX]; + struct ref_lock *lock; + + if (get_sha1(object_ref, object)) + die("Failed to resolve '%s' as a valid ref.", object_ref); + if (get_sha1(replace_ref, repl)) + die("Failed to resolve '%s' as a valid ref.", replace_ref); + + if (snprintf(ref, sizeof(ref), + "refs/replace/%s", + sha1_to_hex(object)) > sizeof(ref) - 1) + die("replace ref name too long: %.*s...", 50, ref); + if (check_ref_format(ref)) + die("'%s' is not a valid ref name.", ref); + + if (!resolve_ref(ref, prev, 1, NULL)) + hashclr(prev); + else if (!force) + die("replace ref '%s' already exists", ref); + + lock = lock_any_ref_for_update(ref, prev, 0); + if (!lock) + die("%s: cannot lock the ref", ref); + if (write_ref_sha1(lock, repl, NULL) < 0) + die("%s: cannot update the ref", ref); + + return 0; +} + int cmd_replace(int argc, const char **argv, const char *prefix) { - int list = 0, delete = 0; + int list = 0, delete = 0, force = 0; struct option options[] = { OPT_BOOLEAN('l', NULL, &list, "list replace refs"), OPT_BOOLEAN('d', NULL, &delete, "delete replace refs"), + OPT_BOOLEAN('f', NULL, &force, "replace the ref if it exists"), OPT_END() }; @@ -91,15 +126,28 @@ int cmd_replace(int argc, const char **argv, const char *prefix) if (list && delete) usage_with_options(git_replace_usage, options); + if (force && (list || delete)) + usage_with_options(git_replace_usage, options); + + /* Delete refs */ if (delete) { if (argc < 1) usage_with_options(git_replace_usage, options); return for_each_replace_name(argv, delete_replace_ref); } + /* Replace object */ + if (!list && argc) { + if (argc != 2) + usage_with_options(git_replace_usage, options); + return replace_object(argv[0], argv[1], force); + } + /* List refs, even if "list" is not set */ if (argc > 1) usage_with_options(git_replace_usage, options); + if (force) + usage_with_options(git_replace_usage, options); return list_replace_refs(argv[0]); } |