mirror of
https://github.com/git/git.git
synced 2024-11-18 06:54:55 +01:00
691f1a28bf
This helps to notice when something's going wrong, especially on systems which lock open files. I used the following criteria when selecting the code for replacement: - it was already printing a warning for the unlink failures - it is in a function which already printing something or is called from such a function - it is in a static function, returning void and the function is only called from a builtin main function (cmd_) - it is in a function which handles emergency exit (signal handlers) - it is in a function which is obvously cleaning up the lockfiles Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
487 lines
11 KiB
C
487 lines
11 KiB
C
/*
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* Builtin "git tag"
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*
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* Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
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* Carlos Rica <jasampler@gmail.com>
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* Based on git-tag.sh and mktag.c by Linus Torvalds.
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*/
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#include "cache.h"
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#include "builtin.h"
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#include "refs.h"
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#include "tag.h"
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#include "run-command.h"
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#include "parse-options.h"
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static const char * const git_tag_usage[] = {
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"git tag [-a|-s|-u <key-id>] [-f] [-m <msg>|-F <file>] <tagname> [<head>]",
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"git tag -d <tagname>...",
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"git tag -l [-n[<num>]] [<pattern>]",
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"git tag -v <tagname>...",
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NULL
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};
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static char signingkey[1000];
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struct tag_filter {
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const char *pattern;
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int lines;
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struct commit_list *with_commit;
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};
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#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----"
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static int show_reference(const char *refname, const unsigned char *sha1,
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int flag, void *cb_data)
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{
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struct tag_filter *filter = cb_data;
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if (!fnmatch(filter->pattern, refname, 0)) {
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int i;
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unsigned long size;
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enum object_type type;
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char *buf, *sp, *eol;
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size_t len;
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if (filter->with_commit) {
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struct commit *commit;
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commit = lookup_commit_reference_gently(sha1, 1);
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if (!commit)
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return 0;
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if (!is_descendant_of(commit, filter->with_commit))
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return 0;
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}
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if (!filter->lines) {
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printf("%s\n", refname);
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return 0;
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}
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printf("%-15s ", refname);
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buf = read_sha1_file(sha1, &type, &size);
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if (!buf || !size)
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return 0;
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/* skip header */
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sp = strstr(buf, "\n\n");
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if (!sp) {
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free(buf);
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return 0;
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}
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/* only take up to "lines" lines, and strip the signature */
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for (i = 0, sp += 2;
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i < filter->lines && sp < buf + size &&
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prefixcmp(sp, PGP_SIGNATURE "\n");
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i++) {
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if (i)
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printf("\n ");
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eol = memchr(sp, '\n', size - (sp - buf));
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len = eol ? eol - sp : size - (sp - buf);
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fwrite(sp, len, 1, stdout);
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if (!eol)
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break;
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sp = eol + 1;
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}
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putchar('\n');
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free(buf);
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}
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return 0;
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}
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static int list_tags(const char *pattern, int lines,
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struct commit_list *with_commit)
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{
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struct tag_filter filter;
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if (pattern == NULL)
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pattern = "*";
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filter.pattern = pattern;
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filter.lines = lines;
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filter.with_commit = with_commit;
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for_each_tag_ref(show_reference, (void *) &filter);
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return 0;
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}
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typedef int (*each_tag_name_fn)(const char *name, const char *ref,
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const unsigned char *sha1);
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static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
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{
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const char **p;
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char ref[PATH_MAX];
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int had_error = 0;
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unsigned char sha1[20];
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for (p = argv; *p; p++) {
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if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
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>= sizeof(ref)) {
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error("tag name too long: %.*s...", 50, *p);
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had_error = 1;
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continue;
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}
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if (!resolve_ref(ref, sha1, 1, NULL)) {
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error("tag '%s' not found.", *p);
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had_error = 1;
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continue;
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}
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if (fn(*p, ref, sha1))
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had_error = 1;
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}
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return had_error;
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}
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static int delete_tag(const char *name, const char *ref,
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const unsigned char *sha1)
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{
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if (delete_ref(ref, sha1, 0))
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return 1;
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printf("Deleted tag '%s'\n", name);
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return 0;
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}
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static int verify_tag(const char *name, const char *ref,
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const unsigned char *sha1)
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{
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const char *argv_verify_tag[] = {"git-verify-tag",
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"-v", "SHA1_HEX", NULL};
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argv_verify_tag[2] = sha1_to_hex(sha1);
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if (run_command_v_opt(argv_verify_tag, 0))
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return error("could not verify the tag '%s'", name);
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return 0;
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}
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static int do_sign(struct strbuf *buffer)
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{
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struct child_process gpg;
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const char *args[4];
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char *bracket;
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int len;
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int i, j;
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if (!*signingkey) {
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if (strlcpy(signingkey, git_committer_info(IDENT_ERROR_ON_NO_NAME),
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sizeof(signingkey)) > sizeof(signingkey) - 1)
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return error("committer info too long.");
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bracket = strchr(signingkey, '>');
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if (bracket)
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bracket[1] = '\0';
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}
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/* When the username signingkey is bad, program could be terminated
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* because gpg exits without reading and then write gets SIGPIPE. */
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signal(SIGPIPE, SIG_IGN);
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memset(&gpg, 0, sizeof(gpg));
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gpg.argv = args;
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gpg.in = -1;
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gpg.out = -1;
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args[0] = "gpg";
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args[1] = "-bsau";
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args[2] = signingkey;
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args[3] = NULL;
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if (start_command(&gpg))
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return error("could not run gpg.");
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if (write_in_full(gpg.in, buffer->buf, buffer->len) != buffer->len) {
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close(gpg.in);
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close(gpg.out);
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finish_command(&gpg);
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return error("gpg did not accept the tag data");
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}
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close(gpg.in);
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len = strbuf_read(buffer, gpg.out, 1024);
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close(gpg.out);
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if (finish_command(&gpg) || !len || len < 0)
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return error("gpg failed to sign the tag");
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/* Strip CR from the line endings, in case we are on Windows. */
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for (i = j = 0; i < buffer->len; i++)
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if (buffer->buf[i] != '\r') {
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if (i != j)
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buffer->buf[j] = buffer->buf[i];
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j++;
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}
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strbuf_setlen(buffer, j);
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return 0;
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}
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static const char tag_template[] =
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"\n"
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"#\n"
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"# Write a tag message\n"
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"#\n";
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static void set_signingkey(const char *value)
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{
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if (strlcpy(signingkey, value, sizeof(signingkey)) >= sizeof(signingkey))
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die("signing key value too long (%.10s...)", value);
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}
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static int git_tag_config(const char *var, const char *value, void *cb)
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{
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if (!strcmp(var, "user.signingkey")) {
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if (!value)
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return config_error_nonbool(var);
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set_signingkey(value);
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return 0;
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}
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return git_default_config(var, value, cb);
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}
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static void write_tag_body(int fd, const unsigned char *sha1)
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{
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unsigned long size;
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enum object_type type;
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char *buf, *sp, *eob;
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size_t len;
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buf = read_sha1_file(sha1, &type, &size);
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if (!buf)
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return;
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/* skip header */
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sp = strstr(buf, "\n\n");
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if (!sp || !size || type != OBJ_TAG) {
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free(buf);
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return;
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}
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sp += 2; /* skip the 2 LFs */
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eob = strstr(sp, "\n" PGP_SIGNATURE "\n");
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if (eob)
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len = eob - sp;
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else
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len = buf + size - sp;
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write_or_die(fd, sp, len);
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free(buf);
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}
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static int build_tag_object(struct strbuf *buf, int sign, unsigned char *result)
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{
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if (sign && do_sign(buf) < 0)
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return error("unable to sign the tag");
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if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
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return error("unable to write tag file");
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return 0;
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}
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static void create_tag(const unsigned char *object, const char *tag,
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struct strbuf *buf, int message, int sign,
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unsigned char *prev, unsigned char *result)
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{
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enum object_type type;
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char header_buf[1024];
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int header_len;
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char *path = NULL;
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type = sha1_object_info(object, NULL);
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if (type <= OBJ_NONE)
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die("bad object type.");
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header_len = snprintf(header_buf, sizeof(header_buf),
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"object %s\n"
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"type %s\n"
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"tag %s\n"
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"tagger %s\n\n",
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sha1_to_hex(object),
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typename(type),
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tag,
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git_committer_info(IDENT_ERROR_ON_NO_NAME));
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if (header_len > sizeof(header_buf) - 1)
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die("tag header too big.");
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if (!message) {
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int fd;
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/* write the template message before editing: */
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path = git_pathdup("TAG_EDITMSG");
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fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
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if (fd < 0)
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die("could not create file '%s': %s",
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path, strerror(errno));
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if (!is_null_sha1(prev))
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write_tag_body(fd, prev);
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else
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write_or_die(fd, tag_template, strlen(tag_template));
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close(fd);
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if (launch_editor(path, buf, NULL)) {
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fprintf(stderr,
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"Please supply the message using either -m or -F option.\n");
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exit(1);
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}
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}
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stripspace(buf, 1);
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if (!message && !buf->len)
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die("no tag message?");
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strbuf_insert(buf, 0, header_buf, header_len);
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if (build_tag_object(buf, sign, result) < 0) {
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if (path)
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fprintf(stderr, "The tag message has been left in %s\n",
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path);
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exit(128);
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}
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if (path) {
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unlink_or_warn(path);
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free(path);
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}
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}
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struct msg_arg {
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int given;
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struct strbuf buf;
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};
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static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
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{
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struct msg_arg *msg = opt->value;
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if (!arg)
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return -1;
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if (msg->buf.len)
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strbuf_addstr(&(msg->buf), "\n\n");
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strbuf_addstr(&(msg->buf), arg);
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msg->given = 1;
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return 0;
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}
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int cmd_tag(int argc, const char **argv, const char *prefix)
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{
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struct strbuf buf = STRBUF_INIT;
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unsigned char object[20], prev[20];
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char ref[PATH_MAX];
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const char *object_ref, *tag;
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struct ref_lock *lock;
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int annotate = 0, sign = 0, force = 0, lines = -1,
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list = 0, delete = 0, verify = 0;
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const char *msgfile = NULL, *keyid = NULL;
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struct msg_arg msg = { 0, STRBUF_INIT };
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struct commit_list *with_commit = NULL;
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struct option options[] = {
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OPT_BOOLEAN('l', NULL, &list, "list tag names"),
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{ OPTION_INTEGER, 'n', NULL, &lines, NULL,
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"print n lines of each tag message",
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PARSE_OPT_OPTARG, NULL, 1 },
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OPT_BOOLEAN('d', NULL, &delete, "delete tags"),
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OPT_BOOLEAN('v', NULL, &verify, "verify tags"),
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OPT_GROUP("Tag creation options"),
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OPT_BOOLEAN('a', NULL, &annotate,
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"annotated tag, needs a message"),
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OPT_CALLBACK('m', NULL, &msg, "msg",
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"message for the tag", parse_msg_arg),
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OPT_STRING('F', NULL, &msgfile, "file", "message in a file"),
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OPT_BOOLEAN('s', NULL, &sign, "annotated and GPG-signed tag"),
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OPT_STRING('u', NULL, &keyid, "key-id",
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"use another key to sign the tag"),
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OPT_BOOLEAN('f', NULL, &force, "replace the tag if exists"),
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OPT_GROUP("Tag listing options"),
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{
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OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
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"print only tags that contain the commit",
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PARSE_OPT_LASTARG_DEFAULT,
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parse_opt_with_commit, (intptr_t)"HEAD",
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},
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OPT_END()
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};
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git_config(git_tag_config, NULL);
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argc = parse_options(argc, argv, options, git_tag_usage, 0);
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msgfile = parse_options_fix_filename(prefix, msgfile);
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if (keyid) {
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sign = 1;
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set_signingkey(keyid);
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}
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if (sign)
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annotate = 1;
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if (argc == 0 && !(delete || verify))
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list = 1;
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if ((annotate || msg.given || msgfile || force) &&
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(list || delete || verify))
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usage_with_options(git_tag_usage, options);
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if (list + delete + verify > 1)
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usage_with_options(git_tag_usage, options);
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if (list)
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return list_tags(argv[0], lines == -1 ? 0 : lines,
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with_commit);
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if (lines != -1)
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die("-n option is only allowed with -l.");
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if (with_commit)
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die("--contains option is only allowed with -l.");
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if (delete)
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return for_each_tag_name(argv, delete_tag);
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if (verify)
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return for_each_tag_name(argv, verify_tag);
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if (msg.given || msgfile) {
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if (msg.given && msgfile)
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die("only one -F or -m option is allowed.");
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annotate = 1;
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if (msg.given)
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strbuf_addbuf(&buf, &(msg.buf));
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else {
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if (!strcmp(msgfile, "-")) {
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if (strbuf_read(&buf, 0, 1024) < 0)
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die("cannot read %s", msgfile);
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} else {
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if (strbuf_read_file(&buf, msgfile, 1024) < 0)
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die("could not open or read '%s': %s",
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msgfile, strerror(errno));
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}
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}
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}
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tag = argv[0];
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object_ref = argc == 2 ? argv[1] : "HEAD";
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if (argc > 2)
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die("too many params");
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if (get_sha1(object_ref, object))
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die("Failed to resolve '%s' as a valid ref.", object_ref);
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if (snprintf(ref, sizeof(ref), "refs/tags/%s", tag) > sizeof(ref) - 1)
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die("tag name too long: %.*s...", 50, tag);
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if (check_ref_format(ref))
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die("'%s' is not a valid tag name.", tag);
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if (!resolve_ref(ref, prev, 1, NULL))
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hashclr(prev);
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else if (!force)
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die("tag '%s' already exists", tag);
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if (annotate)
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create_tag(object, tag, &buf, msg.given || msgfile,
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sign, prev, object);
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lock = lock_any_ref_for_update(ref, prev, 0);
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if (!lock)
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die("%s: cannot lock the ref", ref);
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if (write_ref_sha1(lock, object, NULL) < 0)
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die("%s: cannot update the ref", ref);
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strbuf_release(&buf);
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return 0;
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}
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