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|
/*
* Builtin "git tag"
*
* Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
* Carlos Rica <jasampler@gmail.com>
* Based on git-tag.sh and mktag.c by Linus Torvalds.
*/
#include "cache.h"
#include "builtin.h"
#include "refs.h"
#include "tag.h"
#include "run-command.h"
#include "parse-options.h"
#include "diff.h"
#include "revision.h"
#include "gpg-interface.h"
#include "sha1-array.h"
#include "column.h"
static const char * const git_tag_usage[] = {
N_("git tag [-a|-s|-u <key-id>] [-f] [-m <msg>|-F <file>] <tagname> [<head>]"),
N_("git tag -d <tagname>..."),
N_("git tag -l [-n[<num>]] [--contains <commit>] [--points-at <object>] "
"\n\t\t[<pattern>...]"),
N_("git tag -v <tagname>..."),
NULL
};
#define STRCMP_SORT 0 /* must be zero */
#define VERCMP_SORT 1
#define SORT_MASK 0x7fff
#define REVERSE_SORT 0x8000
static int tag_sort;
struct tag_filter {
const char **patterns;
int lines;
int sort;
struct string_list tags;
struct commit_list *with_commit;
};
static struct sha1_array points_at;
static unsigned int colopts;
static int match_pattern(const char **patterns, const char *ref)
{
/* no pattern means match everything */
if (!*patterns)
return 1;
for (; *patterns; patterns++)
if (!wildmatch(*patterns, ref, 0, NULL))
return 1;
return 0;
}
static const unsigned char *match_points_at(const char *refname,
const unsigned char *sha1)
{
const unsigned char *tagged_sha1 = NULL;
struct object *obj;
if (sha1_array_lookup(&points_at, sha1) >= 0)
return sha1;
obj = parse_object(sha1);
if (!obj)
die(_("malformed object at '%s'"), refname);
if (obj->type == OBJ_TAG)
tagged_sha1 = ((struct tag *)obj)->tagged->sha1;
if (tagged_sha1 && sha1_array_lookup(&points_at, tagged_sha1) >= 0)
return tagged_sha1;
return NULL;
}
static int in_commit_list(const struct commit_list *want, struct commit *c)
{
for (; want; want = want->next)
if (!hashcmp(want->item->object.sha1, c->object.sha1))
return 1;
return 0;
}
enum contains_result {
CONTAINS_UNKNOWN = -1,
CONTAINS_NO = 0,
CONTAINS_YES = 1
};
/*
* Test whether the candidate or one of its parents is contained in the list.
* Do not recurse to find out, though, but return -1 if inconclusive.
*/
static enum contains_result contains_test(struct commit *candidate,
const struct commit_list *want)
{
/* was it previously marked as containing a want commit? */
if (candidate->object.flags & TMP_MARK)
return 1;
/* or marked as not possibly containing a want commit? */
if (candidate->object.flags & UNINTERESTING)
return 0;
/* or are we it? */
if (in_commit_list(want, candidate)) {
candidate->object.flags |= TMP_MARK;
return 1;
}
if (parse_commit(candidate) < 0)
return 0;
return -1;
}
/*
* Mimicking the real stack, this stack lives on the heap, avoiding stack
* overflows.
*
* At each recursion step, the stack items points to the commits whose
* ancestors are to be inspected.
*/
struct stack {
int nr, alloc;
struct stack_entry {
struct commit *commit;
struct commit_list *parents;
} *stack;
};
static void push_to_stack(struct commit *candidate, struct stack *stack)
{
int index = stack->nr++;
ALLOC_GROW(stack->stack, stack->nr, stack->alloc);
stack->stack[index].commit = candidate;
stack->stack[index].parents = candidate->parents;
}
static enum contains_result contains(struct commit *candidate,
const struct commit_list *want)
{
struct stack stack = { 0, 0, NULL };
int result = contains_test(candidate, want);
if (result != CONTAINS_UNKNOWN)
return result;
push_to_stack(candidate, &stack);
while (stack.nr) {
struct stack_entry *entry = &stack.stack[stack.nr - 1];
struct commit *commit = entry->commit;
struct commit_list *parents = entry->parents;
if (!parents) {
commit->object.flags |= UNINTERESTING;
stack.nr--;
}
/*
* If we just popped the stack, parents->item has been marked,
* therefore contains_test will return a meaningful 0 or 1.
*/
else switch (contains_test(parents->item, want)) {
case CONTAINS_YES:
commit->object.flags |= TMP_MARK;
stack.nr--;
break;
case CONTAINS_NO:
entry->parents = parents->next;
break;
case CONTAINS_UNKNOWN:
push_to_stack(parents->item, &stack);
break;
}
}
free(stack.stack);
return contains_test(candidate, want);
}
static void show_tag_lines(const unsigned char *sha1, int lines)
{
int i;
unsigned long size;
enum object_type type;
char *buf, *sp, *eol;
size_t len;
buf = read_sha1_file(sha1, &type, &size);
if (!buf)
die_errno("unable to read object %s", sha1_to_hex(sha1));
if (type != OBJ_COMMIT && type != OBJ_TAG)
goto free_return;
if (!size)
die("an empty %s object %s?",
typename(type), sha1_to_hex(sha1));
/* skip header */
sp = strstr(buf, "\n\n");
if (!sp)
goto free_return;
/* only take up to "lines" lines, and strip the signature from a tag */
if (type == OBJ_TAG)
size = parse_signature(buf, size);
for (i = 0, sp += 2; i < lines && sp < buf + size; i++) {
if (i)
printf("\n ");
eol = memchr(sp, '\n', size - (sp - buf));
len = eol ? eol - sp : size - (sp - buf);
fwrite(sp, len, 1, stdout);
if (!eol)
break;
sp = eol + 1;
}
free_return:
free(buf);
}
static int show_reference(const char *refname, const unsigned char *sha1,
int flag, void *cb_data)
{
struct tag_filter *filter = cb_data;
if (match_pattern(filter->patterns, refname)) {
if (filter->with_commit) {
struct commit *commit;
commit = lookup_commit_reference_gently(sha1, 1);
if (!commit)
return 0;
if (!contains(commit, filter->with_commit))
return 0;
}
if (points_at.nr && !match_points_at(refname, sha1))
return 0;
if (!filter->lines) {
if (filter->sort)
string_list_append(&filter->tags, refname);
else
printf("%s\n", refname);
return 0;
}
printf("%-15s ", refname);
show_tag_lines(sha1, filter->lines);
putchar('\n');
}
return 0;
}
static int sort_by_version(const void *a_, const void *b_)
{
const struct string_list_item *a = a_;
const struct string_list_item *b = b_;
return versioncmp(a->string, b->string);
}
static int list_tags(const char **patterns, int lines,
struct commit_list *with_commit, int sort)
{
struct tag_filter filter;
filter.patterns = patterns;
filter.lines = lines;
filter.sort = sort;
filter.with_commit = with_commit;
memset(&filter.tags, 0, sizeof(filter.tags));
filter.tags.strdup_strings = 1;
for_each_tag_ref(show_reference, (void *) &filter);
if (sort) {
int i;
if ((sort & SORT_MASK) == VERCMP_SORT)
qsort(filter.tags.items, filter.tags.nr,
sizeof(struct string_list_item), sort_by_version);
if (sort & REVERSE_SORT)
for (i = filter.tags.nr - 1; i >= 0; i--)
printf("%s\n", filter.tags.items[i].string);
else
for (i = 0; i < filter.tags.nr; i++)
printf("%s\n", filter.tags.items[i].string);
string_list_clear(&filter.tags, 0);
}
return 0;
}
typedef int (*each_tag_name_fn)(const char *name, const char *ref,
const unsigned char *sha1);
static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
{
const char **p;
char ref[PATH_MAX];
int had_error = 0;
unsigned char sha1[20];
for (p = argv; *p; p++) {
if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
>= sizeof(ref)) {
error(_("tag name too long: %.*s..."), 50, *p);
had_error = 1;
continue;
}
if (read_ref(ref, sha1)) {
error(_("tag '%s' not found."), *p);
had_error = 1;
continue;
}
if (fn(*p, ref, sha1))
had_error = 1;
}
return had_error;
}
static int delete_tag(const char *name, const char *ref,
const unsigned char *sha1)
{
if (delete_ref(ref, sha1, 0))
return 1;
printf(_("Deleted tag '%s' (was %s)\n"), name, find_unique_abbrev(sha1, DEFAULT_ABBREV));
return 0;
}
static int verify_tag(const char *name, const char *ref,
const unsigned char *sha1)
{
const char *argv_verify_tag[] = {"verify-tag",
"-v", "SHA1_HEX", NULL};
argv_verify_tag[2] = sha1_to_hex(sha1);
if (run_command_v_opt(argv_verify_tag, RUN_GIT_CMD))
return error(_("could not verify the tag '%s'"), name);
return 0;
}
static int do_sign(struct strbuf *buffer)
{
return sign_buffer(buffer, buffer, get_signing_key());
}
static const char tag_template[] =
N_("\nWrite a message for tag:\n %s\n"
"Lines starting with '%c' will be ignored.\n");
static const char tag_template_nocleanup[] =
N_("\nWrite a message for tag:\n %s\n"
"Lines starting with '%c' will be kept; you may remove them"
" yourself if you want to.\n");
/*
* Parse a sort string, and return 0 if parsed successfully. Will return
* non-zero when the sort string does not parse into a known type. If var is
* given, the error message becomes a warning and includes information about
* the configuration value.
*/
static int parse_sort_string(const char *var, const char *arg, int *sort)
{
int type = 0, flags = 0;
if (skip_prefix(arg, "-", &arg))
flags |= REVERSE_SORT;
if (skip_prefix(arg, "version:", &arg) || skip_prefix(arg, "v:", &arg))
type = VERCMP_SORT;
else
type = STRCMP_SORT;
if (strcmp(arg, "refname")) {
if (!var)
return error(_("unsupported sort specification '%s'"), arg);
else {
warning(_("unsupported sort specification '%s' in variable '%s'"),
var, arg);
return -1;
}
}
*sort = (type | flags);
return 0;
}
static int git_tag_config(const char *var, const char *value, void *cb)
{
int status;
if (!strcmp(var, "tag.sort")) {
if (!value)
return config_error_nonbool(var);
parse_sort_string(var, value, &tag_sort);
return 0;
}
status = git_gpg_config(var, value, cb);
if (status)
return status;
if (starts_with(var, "column."))
return git_column_config(var, value, "tag", &colopts);
return git_default_config(var, value, cb);
}
static void write_tag_body(int fd, const unsigned char *sha1)
{
unsigned long size;
enum object_type type;
char *buf, *sp;
buf = read_sha1_file(sha1, &type, &size);
if (!buf)
return;
/* skip header */
sp = strstr(buf, "\n\n");
if (!sp || !size || type != OBJ_TAG) {
free(buf);
return;
}
sp += 2; /* skip the 2 LFs */
write_or_die(fd, sp, parse_signature(sp, buf + size - sp));
free(buf);
}
static int build_tag_object(struct strbuf *buf, int sign, unsigned char *result)
{
if (sign && do_sign(buf) < 0)
return error(_("unable to sign the tag"));
if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
return error(_("unable to write tag file"));
return 0;
}
struct create_tag_options {
unsigned int message_given:1;
unsigned int sign;
enum {
CLEANUP_NONE,
CLEANUP_SPACE,
CLEANUP_ALL
} cleanup_mode;
};
static void create_tag(const unsigned char *object, const char *tag,
struct strbuf *buf, struct create_tag_options *opt,
unsigned char *prev, unsigned char *result)
{
enum object_type type;
char header_buf[1024];
int header_len;
char *path = NULL;
type = sha1_object_info(object, NULL);
if (type <= OBJ_NONE)
die(_("bad object type."));
header_len = snprintf(header_buf, sizeof(header_buf),
"object %s\n"
"type %s\n"
"tag %s\n"
"tagger %s\n\n",
sha1_to_hex(object),
typename(type),
tag,
git_committer_info(IDENT_STRICT));
if (header_len > sizeof(header_buf) - 1)
die(_("tag header too big."));
if (!opt->message_given) {
int fd;
/* write the template message before editing: */
path = git_pathdup("TAG_EDITMSG");
fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
if (fd < 0)
die_errno(_("could not create file '%s'"), path);
if (!is_null_sha1(prev)) {
write_tag_body(fd, prev);
} else {
struct strbuf buf = STRBUF_INIT;
strbuf_addch(&buf, '\n');
if (opt->cleanup_mode == CLEANUP_ALL)
strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
else
strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
write_or_die(fd, buf.buf, buf.len);
strbuf_release(&buf);
}
close(fd);
if (launch_editor(path, buf, NULL)) {
fprintf(stderr,
_("Please supply the message using either -m or -F option.\n"));
exit(1);
}
}
if (opt->cleanup_mode != CLEANUP_NONE)
stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
if (!opt->message_given && !buf->len)
die(_("no tag message?"));
strbuf_insert(buf, 0, header_buf, header_len);
if (build_tag_object(buf, opt->sign, result) < 0) {
if (path)
fprintf(stderr, _("The tag message has been left in %s\n"),
path);
exit(128);
}
if (path) {
unlink_or_warn(path);
free(path);
}
}
struct msg_arg {
int given;
struct strbuf buf;
};
static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
{
struct msg_arg *msg = opt->value;
if (!arg)
return -1;
if (msg->buf.len)
strbuf_addstr(&(msg->buf), "\n\n");
strbuf_addstr(&(msg->buf), arg);
msg->given = 1;
return 0;
}
static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
{
if (name[0] == '-')
return -1;
strbuf_reset(sb);
strbuf_addf(sb, "refs/tags/%s", name);
return check_refname_format(sb->buf, 0);
}
static int parse_opt_points_at(const struct option *opt __attribute__((unused)),
const char *arg, int unset)
{
unsigned char sha1[20];
if (unset) {
sha1_array_clear(&points_at);
return 0;
}
if (!arg)
return error(_("switch 'points-at' requires an object"));
if (get_sha1(arg, sha1))
return error(_("malformed object name '%s'"), arg);
sha1_array_append(&points_at, sha1);
return 0;
}
static int parse_opt_sort(const struct option *opt, const char *arg, int unset)
{
int *sort = opt->value;
return parse_sort_string(NULL, arg, sort);
}
int cmd_tag(int argc, const char **argv, const char *prefix)
{
struct strbuf buf = STRBUF_INIT;
struct strbuf ref = STRBUF_INIT;
unsigned char object[20], prev[20];
const char *object_ref, *tag;
struct create_tag_options opt;
char *cleanup_arg = NULL;
int annotate = 0, force = 0, lines = -1;
int cmdmode = 0;
const char *msgfile = NULL, *keyid = NULL;
struct msg_arg msg = { 0, STRBUF_INIT };
struct commit_list *with_commit = NULL;
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
struct option options[] = {
OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
{ OPTION_INTEGER, 'n', NULL, &lines, N_("n"),
N_("print <n> lines of each tag message"),
PARSE_OPT_OPTARG, NULL, 1 },
OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
OPT_GROUP(N_("Tag creation options")),
OPT_BOOL('a', "annotate", &annotate,
N_("annotated tag, needs a message")),
OPT_CALLBACK('m', "message", &msg, N_("message"),
N_("tag message"), parse_msg_arg),
OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
OPT_STRING(0, "cleanup", &cleanup_arg, N_("mode"),
N_("how to strip spaces and #comments from message")),
OPT_STRING('u', "local-user", &keyid, N_("key-id"),
N_("use another key to sign the tag")),
OPT__FORCE(&force, N_("replace the tag if exists")),
OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
{
OPTION_CALLBACK, 0, "sort", &tag_sort, N_("type"), N_("sort tags"),
PARSE_OPT_NONEG, parse_opt_sort
},
OPT_GROUP(N_("Tag listing options")),
{
OPTION_CALLBACK, 0, "contains", &with_commit, N_("commit"),
N_("print only tags that contain the commit"),
PARSE_OPT_LASTARG_DEFAULT,
parse_opt_with_commit, (intptr_t)"HEAD",
},
{
OPTION_CALLBACK, 0, "with", &with_commit, N_("commit"),
N_("print only tags that contain the commit"),
PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
parse_opt_with_commit, (intptr_t)"HEAD",
},
{
OPTION_CALLBACK, 0, "points-at", NULL, N_("object"),
N_("print only tags of the object"), 0, parse_opt_points_at
},
OPT_END()
};
git_config(git_tag_config, NULL);
memset(&opt, 0, sizeof(opt));
argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
if (keyid) {
opt.sign = 1;
set_signing_key(keyid);
}
if (opt.sign)
annotate = 1;
if (argc == 0 && !cmdmode)
cmdmode = 'l';
if ((annotate || msg.given || msgfile || force) && (cmdmode != 0))
usage_with_options(git_tag_usage, options);
finalize_colopts(&colopts, -1);
if (cmdmode == 'l' && lines != -1) {
if (explicitly_enable_column(colopts))
die(_("--column and -n are incompatible"));
colopts = 0;
}
if (cmdmode == 'l') {
int ret;
if (column_active(colopts)) {
struct column_options copts;
memset(&copts, 0, sizeof(copts));
copts.padding = 2;
run_column_filter(colopts, &copts);
}
if (lines != -1 && tag_sort)
die(_("--sort and -n are incompatible"));
ret = list_tags(argv, lines == -1 ? 0 : lines, with_commit, tag_sort);
if (column_active(colopts))
stop_column_filter();
return ret;
}
if (lines != -1)
die(_("-n option is only allowed with -l."));
if (with_commit)
die(_("--contains option is only allowed with -l."));
if (points_at.nr)
die(_("--points-at option is only allowed with -l."));
if (cmdmode == 'd')
return for_each_tag_name(argv, delete_tag);
if (cmdmode == 'v')
return for_each_tag_name(argv, verify_tag);
if (msg.given || msgfile) {
if (msg.given && msgfile)
die(_("only one -F or -m option is allowed."));
annotate = 1;
if (msg.given)
strbuf_addbuf(&buf, &(msg.buf));
else {
if (!strcmp(msgfile, "-")) {
if (strbuf_read(&buf, 0, 1024) < 0)
die_errno(_("cannot read '%s'"), msgfile);
} else {
if (strbuf_read_file(&buf, msgfile, 1024) < 0)
die_errno(_("could not open or read '%s'"),
msgfile);
}
}
}
tag = argv[0];
object_ref = argc == 2 ? argv[1] : "HEAD";
if (argc > 2)
die(_("too many params"));
if (get_sha1(object_ref, object))
die(_("Failed to resolve '%s' as a valid ref."), object_ref);
if (strbuf_check_tag_ref(&ref, tag))
die(_("'%s' is not a valid tag name."), tag);
if (read_ref(ref.buf, prev))
hashclr(prev);
else if (!force)
die(_("tag '%s' already exists"), tag);
opt.message_given = msg.given || msgfile;
if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
opt.cleanup_mode = CLEANUP_ALL;
else if (!strcmp(cleanup_arg, "verbatim"))
opt.cleanup_mode = CLEANUP_NONE;
else if (!strcmp(cleanup_arg, "whitespace"))
opt.cleanup_mode = CLEANUP_SPACE;
else
die(_("Invalid cleanup mode %s"), cleanup_arg);
if (annotate)
create_tag(object, tag, &buf, &opt, prev, object);
transaction = ref_transaction_begin(&err);
if (!transaction ||
ref_transaction_update(transaction, ref.buf, object, prev,
0, 1, NULL, &err) ||
ref_transaction_commit(transaction, &err))
die("%s", err.buf);
ref_transaction_free(transaction);
if (force && !is_null_sha1(prev) && hashcmp(prev, object))
printf(_("Updated tag '%s' (was %s)\n"), tag, find_unique_abbrev(prev, DEFAULT_ABBREV));
strbuf_release(&err);
strbuf_release(&buf);
strbuf_release(&ref);
return 0;
}
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