mirror of
https://github.com/git/git.git
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387e7e19d7
* make strbuf_read_file take a size hint (works like strbuf_read) * use it in a couple of places. Signed-off-by: Pierre Habouzit <madcoder@debian.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
433 lines
9.6 KiB
C
433 lines
9.6 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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static const char builtin_tag_usage[] =
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"git-tag [-n [<num>]] -l [<pattern>] | [-a | -s | -u <key-id>] [-f | -d | -v] [-m <msg> | -F <file>] <tagname> [<head>]";
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static char signingkey[1000];
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static void launch_editor(const char *path, struct strbuf *buffer)
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{
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const char *editor, *terminal;
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struct child_process child;
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const char *args[3];
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editor = getenv("GIT_EDITOR");
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if (!editor && editor_program)
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editor = editor_program;
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if (!editor)
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editor = getenv("VISUAL");
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if (!editor)
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editor = getenv("EDITOR");
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terminal = getenv("TERM");
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if (!editor && (!terminal || !strcmp(terminal, "dumb"))) {
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fprintf(stderr,
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"Terminal is dumb but no VISUAL nor EDITOR defined.\n"
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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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if (!editor)
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editor = "vi";
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memset(&child, 0, sizeof(child));
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child.argv = args;
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args[0] = editor;
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args[1] = path;
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args[2] = NULL;
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if (run_command(&child))
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die("There was a problem with the editor %s.", editor);
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if (strbuf_read_file(buffer, path, 0) < 0)
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die("could not read message file '%s': %s",
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path, strerror(errno));
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}
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struct tag_filter {
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const char *pattern;
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int lines;
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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->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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sp = buf = read_sha1_file(sha1, &type, &size);
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if (!buf)
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return 0;
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if (!size) {
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free(buf);
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return 0;
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}
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/* skip header */
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while (sp + 1 < buf + size &&
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!(sp[0] == '\n' && sp[1] == '\n'))
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sp++;
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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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{
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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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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))
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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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if (!*signingkey) {
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if (strlcpy(signingkey, git_committer_info(1),
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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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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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gpg.close_in = 0;
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len = strbuf_read(buffer, gpg.out, 1024);
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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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if (len < 0)
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return error("could not read the entire signature from gpg.");
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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 int git_tag_config(const char *var, const char *value)
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{
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if (!strcmp(var, "user.signingkey")) {
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if (!value)
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die("user.signingkey without value");
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if (strlcpy(signingkey, value, sizeof(signingkey))
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>= sizeof(signingkey))
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die("user.signingkey value too long");
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return 0;
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}
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return git_default_config(var, value);
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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 *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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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(1));
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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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char *path;
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int fd;
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/* write the template message before editing: */
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path = xstrdup(git_path("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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write_or_die(fd, tag_template, strlen(tag_template));
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close(fd);
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launch_editor(path, buf);
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unlink(path);
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free(path);
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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 (sign && do_sign(buf) < 0)
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die("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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die("unable to write tag file");
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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;
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unsigned char object[20], prev[20];
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int annotate = 0, sign = 0, force = 0, lines = 0, message = 0;
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char ref[PATH_MAX];
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const char *object_ref, *tag;
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int i;
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struct ref_lock *lock;
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git_config(git_tag_config);
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strbuf_init(&buf, 0);
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
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if (arg[0] != '-')
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break;
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if (!strcmp(arg, "-a")) {
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annotate = 1;
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continue;
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}
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if (!strcmp(arg, "-s")) {
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annotate = 1;
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sign = 1;
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continue;
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}
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if (!strcmp(arg, "-f")) {
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force = 1;
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continue;
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}
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if (!strcmp(arg, "-n")) {
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if (i + 1 == argc || *argv[i + 1] == '-')
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/* no argument */
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lines = 1;
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else
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lines = isdigit(*argv[++i]) ?
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atoi(argv[i]) : 1;
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continue;
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}
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if (!strcmp(arg, "-m")) {
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annotate = 1;
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i++;
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if (i == argc)
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die("option -m needs an argument.");
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if (message)
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die("only one -F or -m option is allowed.");
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strbuf_addstr(&buf, argv[i]);
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message = 1;
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continue;
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}
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if (!strcmp(arg, "-F")) {
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annotate = 1;
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i++;
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if (i == argc)
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die("option -F needs an argument.");
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if (message)
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die("only one -F or -m option is allowed.");
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if (!strcmp(argv[i], "-")) {
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if (strbuf_read(&buf, 0, 1024) < 0)
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die("cannot read %s", argv[i]);
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} else {
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if (strbuf_read_file(&buf, argv[i], 1024) < 0)
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die("could not open or read '%s': %s",
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argv[i], strerror(errno));
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}
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message = 1;
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continue;
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}
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if (!strcmp(arg, "-u")) {
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annotate = 1;
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sign = 1;
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i++;
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if (i == argc)
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die("option -u needs an argument.");
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if (strlcpy(signingkey, argv[i], sizeof(signingkey))
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>= sizeof(signingkey))
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die("argument to option -u too long");
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continue;
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}
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if (!strcmp(arg, "-l"))
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return list_tags(argv[i + 1], lines);
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if (!strcmp(arg, "-d"))
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return for_each_tag_name(argv + i + 1, delete_tag);
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if (!strcmp(arg, "-v"))
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return for_each_tag_name(argv + i + 1, verify_tag);
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usage(builtin_tag_usage);
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}
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if (i == argc) {
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if (annotate)
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usage(builtin_tag_usage);
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return list_tags(NULL, lines);
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}
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tag = argv[i++];
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object_ref = i < argc ? argv[i] : "HEAD";
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if (i + 1 < argc)
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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, message, sign, 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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