From: Junio C Hamano Date: Sun, 2 Mar 2008 16:51:57 +0000 (-0800) Subject: describe --always: fall back to showing an abbreviated object name X-Git-Tag: v1.5.5-rc0~45^2 X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=da2478dbb000436b79e813ba7f243d6042f26e66;p=git.git describe --always: fall back to showing an abbreviated object name Some callers may find it useful if "git describe" always gave back a string that can be used as a shorter name for a commit object, rather than checking its exit status (while squelching its error message, which could potentially talk about more grave errors that should not be squelched) and implementing a fallback themselves. This teaches describe/name-rev a new option, --always, to use an abbreviated object name when no tags or refs to use is found. Signed-off-by: Junio C Hamano --- diff --git a/builtin-describe.c b/builtin-describe.c index 2f1e7ba15..2946457e9 100644 --- a/builtin-describe.c +++ b/builtin-describe.c @@ -21,6 +21,7 @@ static int longformat; static int abbrev = DEFAULT_ABBREV; static int max_candidates = 10; const char *pattern = NULL; +static int always; struct commit_name { struct tag *tag; @@ -250,8 +251,14 @@ static void describe(const char *arg, int last_one) } } - if (!match_cnt) - die("cannot describe '%s'", sha1_to_hex(cmit->object.sha1)); + if (!match_cnt) { + const unsigned char *sha1 = cmit->object.sha1; + if (always) { + printf("%s\n", find_unique_abbrev(sha1, abbrev)); + return; + } + die("cannot describe '%s'", sha1_to_hex(sha1)); + } qsort(all_matches, match_cnt, sizeof(all_matches[0]), compare_pt); @@ -305,6 +312,8 @@ int cmd_describe(int argc, const char **argv, const char *prefix) "consider most recent tags (default: 10)"), OPT_STRING(0, "match", &pattern, "pattern", "only consider tags matching "), + OPT_BOOLEAN(0, "always", &always, + "show abbreviated commit object as fallback"), OPT_END(), }; @@ -320,11 +329,13 @@ int cmd_describe(int argc, const char **argv, const char *prefix) die("--long is incompatible with --abbrev=0"); if (contains) { - const char **args = xmalloc((6 + argc) * sizeof(char*)); + const char **args = xmalloc((7 + argc) * sizeof(char*)); int i = 0; args[i++] = "name-rev"; args[i++] = "--name-only"; args[i++] = "--no-undefined"; + if (always) + args[i++] = "--always"; if (!all) { args[i++] = "--tags"; if (pattern) { diff --git a/builtin-name-rev.c b/builtin-name-rev.c index f22c8b5f5..384da4db1 100644 --- a/builtin-name-rev.c +++ b/builtin-name-rev.c @@ -125,7 +125,7 @@ static int name_ref(const char *path, const unsigned char *sha1, int flags, void } /* returns a static buffer */ -static const char *get_rev_name(struct object *o) +static const char *get_rev_name(const struct object *o) { static char buffer[1024]; struct rev_name *n; @@ -151,6 +151,26 @@ static const char *get_rev_name(struct object *o) } } +static void show_name(const struct object *obj, + const char *caller_name, + int always, int allow_undefined, int name_only) +{ + const char *name; + const unsigned char *sha1 = obj->sha1; + + if (!name_only) + printf("%s ", caller_name ? caller_name : sha1_to_hex(sha1)); + name = get_rev_name(obj); + if (name) + printf("%s\n", name); + else if (allow_undefined) + printf("undefined\n"); + else if (always) + printf("%s\n", find_unique_abbrev(sha1, DEFAULT_ABBREV)); + else + die("cannot describe '%s'", sha1_to_hex(sha1)); +} + static char const * const name_rev_usage[] = { "git-name-rev [options] ( --all | --stdin | ... )", NULL @@ -159,7 +179,7 @@ static char const * const name_rev_usage[] = { int cmd_name_rev(int argc, const char **argv, const char *prefix) { struct object_array revs = { 0, 0, NULL }; - int all = 0, transform_stdin = 0, allow_undefined = 1; + int all = 0, transform_stdin = 0, allow_undefined = 1, always = 0; struct name_ref_data data = { 0, 0, NULL }; struct option opts[] = { OPT_BOOLEAN(0, "name-only", &data.name_only, "print only names (no SHA-1)"), @@ -170,6 +190,8 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix) OPT_BOOLEAN(0, "all", &all, "list all commits reachable from all refs"), OPT_BOOLEAN(0, "stdin", &transform_stdin, "read from stdin"), OPT_BOOLEAN(0, "undefined", &allow_undefined, "allow to print `undefined` names"), + OPT_BOOLEAN(0, "always", &always, + "show abbreviated commit object as fallback"), OPT_END(), }; @@ -258,35 +280,14 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix) int i, max; max = get_max_object_index(); - for (i = 0; i < max; i++) { - struct object * obj = get_indexed_object(i); - const char *name; - if (!obj) - continue; - if (!data.name_only) - printf("%s ", sha1_to_hex(obj->sha1)); - name = get_rev_name(obj); - if (name) - printf("%s\n", name); - else if (allow_undefined) - printf("undefined\n"); - else - die("cannot describe '%s'", sha1_to_hex(obj->sha1)); - } + for (i = 0; i < max; i++) + show_name(get_indexed_object(i), NULL, + always, allow_undefined, data.name_only); } else { int i; - for (i = 0; i < revs.nr; i++) { - const char *name; - if (!data.name_only) - printf("%s ", revs.objects[i].name); - name = get_rev_name(revs.objects[i].item); - if (name) - printf("%s\n", name); - else if (allow_undefined) - printf("undefined\n"); - else - die("cannot describe '%s'", sha1_to_hex(revs.objects[i].item->sha1)); - } + for (i = 0; i < revs.nr; i++) + show_name(revs.objects[i].item, revs.objects[i].name, + always, allow_undefined, data.name_only); } return 0;