#include "commit.h"
#include "tag.h"
#include "refs.h"
+#include "parse-options.h"
#define CUTOFF_DATE_SLOP 86400 /* one day */
-static const char name_rev_usage[] =
- "git-name-rev [--tags | --refs=<pattern>] ( --all | --stdin | committish [committish...] )\n";
-
typedef struct rev_name {
const char *tip_name;
- int merge_traversals;
int generation;
+ int distance;
} rev_name;
static long cutoff = LONG_MAX;
+/* How many generations are maximally preferred over _one_ merge traversal? */
+#define MERGE_TRAVERSAL_WEIGHT 65535
+
static void name_rev(struct commit *commit,
- const char *tip_name, int merge_traversals, int generation,
+ const char *tip_name, int generation, int distance,
int deref)
{
struct rev_name *name = (struct rev_name *)commit->util;
name = xmalloc(sizeof(rev_name));
commit->util = name;
goto copy_data;
- } else if (name->merge_traversals > merge_traversals ||
- (name->merge_traversals == merge_traversals &&
- name->generation > generation)) {
+ } else if (name->distance > distance) {
copy_data:
name->tip_name = tip_name;
- name->merge_traversals = merge_traversals;
name->generation = generation;
+ name->distance = distance;
} else
return;
sprintf(new_name, "%.*s^%d", len, tip_name,
parent_number);
- name_rev(parents->item, new_name,
- merge_traversals + 1 , 0, 0);
+ name_rev(parents->item, new_name, 0,
+ distance + MERGE_TRAVERSAL_WEIGHT, 0);
} else {
- name_rev(parents->item, tip_name, merge_traversals,
- generation + 1, 0);
+ name_rev(parents->item, tip_name, generation + 1,
+ distance + 1, 0);
}
}
}
}
/* returns a static buffer */
-static const char* get_rev_name(struct object *o)
+static const char *get_rev_name(struct object *o)
{
static char buffer[1024];
struct rev_name *n;
struct commit *c;
if (o->type != OBJ_COMMIT)
- return "undefined";
+ return NULL;
c = (struct commit *) o;
n = c->util;
if (!n)
- return "undefined";
+ return NULL;
if (!n->generation)
return n->tip_name;
}
}
+static char const * const name_rev_usage[] = {
+ "git-name-rev [options] ( --all | --stdin | <commit>... )",
+ NULL
+};
+
int cmd_name_rev(int argc, const char **argv, const char *prefix)
{
struct object_array revs = { 0, 0, NULL };
- int as_is = 0, all = 0, transform_stdin = 0;
+ int all = 0, transform_stdin = 0, allow_undefined = 1;
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)"),
+ OPT_BOOLEAN(0, "tags", &data.tags_only, "only use tags to name the commits"),
+ OPT_STRING(0, "refs", &data.ref_filter, "pattern",
+ "only use refs matching <pattern>"),
+ OPT_GROUP(""),
+ 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_END(),
+ };
git_config(git_default_config);
+ argc = parse_options(argc, argv, opts, name_rev_usage, 0);
+ if (!!all + !!transform_stdin + !!argc > 1) {
+ error("Specify either a list, or --all, not both!");
+ usage_with_options(name_rev_usage, opts);
+ }
+ if (all || transform_stdin)
+ cutoff = 0;
- if (argc < 2)
- usage(name_rev_usage);
-
- for (--argc, ++argv; argc; --argc, ++argv) {
+ for (; argc; argc--, argv++) {
unsigned char sha1[20];
struct object *o;
struct commit *commit;
- if (!as_is && (*argv)[0] == '-') {
- if (!strcmp(*argv, "--")) {
- as_is = 1;
- continue;
- } else if (!strcmp(*argv, "--name-only")) {
- data.name_only = 1;
- continue;
- } else if (!strcmp(*argv, "--tags")) {
- data.tags_only = 1;
- continue;
- } else if (!prefixcmp(*argv, "--refs=")) {
- data.ref_filter = *argv + 7;
- continue;
- } else if (!strcmp(*argv, "--all")) {
- if (argc > 1)
- die("Specify either a list, or --all, not both!");
- all = 1;
- cutoff = 0;
- continue;
- } else if (!strcmp(*argv, "--stdin")) {
- if (argc > 1)
- die("Specify either a list, or --stdin, not both!");
- transform_stdin = 1;
- cutoff = 0;
- continue;
- }
- usage(name_rev_usage);
- }
-
if (get_sha1(*argv, sha1)) {
fprintf(stderr, "Could not get sha1 for %s. Skipping.\n",
*argv);
}
commit = (struct commit *)o;
-
if (cutoff > commit->date)
cutoff = commit->date;
-
add_object_array((struct object *)commit, *argv, &revs);
}
else if (++forty == 40 &&
!ishex(*(p+1))) {
unsigned char sha1[40];
- const char *name = "undefined";
+ const char *name = NULL;
char c = *(p+1);
forty = 0;
}
*(p+1) = c;
- if (!strcmp(name, "undefined"))
+ if (!name)
continue;
- fwrite(p_start, p - p_start + 1, 1,
- stdout);
+ fwrite(p_start, p - p_start + 1, 1, stdout);
printf(" (%s)", name);
p_start = p + 1;
}
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));
- printf("%s\n", get_rev_name(obj));
+ 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));
}
} else {
int i;
for (i = 0; i < revs.nr; i++) {
+ const char *name;
if (!data.name_only)
printf("%s ", revs.objects[i].name);
- printf("%s\n", get_rev_name(revs.objects[i].item));
+ 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));
}
}