From mboxrd@z Thu Jan 1 00:00:00 1970 From: Junio C Hamano Subject: [PATCH v3 08/17] fmt-merge-msg: Add contents of merged tag in the merge message Date: Tue, 8 Nov 2011 17:01:54 -0800 Message-ID: <1320800523-5407-9-git-send-email-gitster@pobox.com> References: <1320800523-5407-1-git-send-email-gitster@pobox.com> To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Wed Nov 09 02:02:50 2011 Return-path: Envelope-to: gcvg-git-2@lo.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1RNwYz-0003z8-JM for gcvg-git-2@lo.gmane.org; Wed, 09 Nov 2011 02:02:50 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752850Ab1KIBC0 (ORCPT ); Tue, 8 Nov 2011 20:02:26 -0500 Received: from b-pb-sasl-quonix.pobox.com ([208.72.237.35]:36459 "EHLO smtp.pobox.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752016Ab1KIBCZ (ORCPT ); Tue, 8 Nov 2011 20:02:25 -0500 Received: from smtp.pobox.com (unknown [127.0.0.1]) by b-sasl-quonix.pobox.com (Postfix) with ESMTP id CC77A5B7C for ; Tue, 8 Nov 2011 20:02:24 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=from:to :subject:date:message-id:in-reply-to:references; s=sasl; bh=mQII lNkbiDRbiIOj77J2oEuDiZc=; b=MKqtMC1utLFh6oQjfrnAzTZ8xtPRzyralPGB pi7w2zTDDvp5fr2tN15i8nfe0dq8dDlFP49Oxa/eHKiqr9NZDDRcIcx86hUudxE2 0+b2uic65urP7ComsHe0CvyeFxgv277Q67M+PedPmGy6uMeuE+MkMcv3XAv5IHjQ kGllU78= DomainKey-Signature: a=rsa-sha1; c=nofws; d=pobox.com; h=from:to:subject :date:message-id:in-reply-to:references; q=dns; s=sasl; b=SKXhkC tv1WtJZnHXmSXT90QEPPOY2YBQp0H1jyYKmQjl/Z/cv/9dmTUgRgrETvqWCNMQnt ygAk38RnIO0dIr4YF7KbMWTVO4JSNYNDeQhZZNjs+6+GFqKgYZGF3lsdUJ3l2Zrr lGTEOCN0B63vvgwySesM//xw2yh67UnJMOPkA= Received: from b-pb-sasl-quonix.pobox.com (unknown [127.0.0.1]) by b-sasl-quonix.pobox.com (Postfix) with ESMTP id C487F5B7B for ; Tue, 8 Nov 2011 20:02:24 -0500 (EST) Received: from pobox.com (unknown [76.102.170.102]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by b-sasl-quonix.pobox.com (Postfix) with ESMTPSA id 1CCE05B78 for ; Tue, 8 Nov 2011 20:02:24 -0500 (EST) X-Mailer: git-send-email 1.7.8.rc1.82.gde0f9 In-Reply-To: <1320800523-5407-1-git-send-email-gitster@pobox.com> X-Pobox-Relay-ID: 7C05F118-0A6E-11E1-9DCB-9DB42E706CDE-77302942!b-pb-sasl-quonix.pobox.com Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: When a contributor asks the integrator to merge her history, a signed tag can be a good vehicle to communicate the authenticity of the request while conveying other information such as the purpose of the topic. E.g. a signed tag "for-linus" can be created, and the integrator can run: $ git pull git://example.com/work.git/ for-linus This would allow the integrator to run "git verify-tag FETCH_HEAD" to validate the signed tag. Update fmt-merge-msg so that it pre-fills the merge message template with the body (but not signature) of the tag object to help the integrator write a better merge message, in the same spirit as the existing merge.log summary lines. The message that comes from GPG signature validation is also included in the merge message template to help the integrator verify it, but they are prefixed with "#" to make them comments. Signed-off-by: Junio C Hamano --- builtin/fmt-merge-msg.c | 72 +++++++++++++++++++++++++++++++++++++++++++++- strbuf.c | 14 +++++++++ strbuf.h | 8 +++++ 3 files changed, 92 insertions(+), 2 deletions(-) diff --git a/builtin/fmt-merge-msg.c b/builtin/fmt-merge-msg.c index 3ff9564..7dae846 100644 --- a/builtin/fmt-merge-msg.c +++ b/builtin/fmt-merge-msg.c @@ -5,6 +5,7 @@ #include "revision.h" #include "tag.h" #include "string-list.h" +#include "gpg-interface.h" static const char * const fmt_merge_msg_usage[] = { "git fmt-merge-msg [-m ] [--log[=]|--no-log] [--file ]", @@ -262,6 +263,70 @@ static void fmt_merge_msg_title(struct strbuf *out, strbuf_addf(out, " into %s\n", current_branch); } +static void fmt_tag_signature(struct strbuf *tagbuf, + struct strbuf *sig, + const char *buf, + unsigned long len) +{ + const char *tag_body = strstr(buf, "\n\n"); + if (tag_body) { + tag_body += 2; + strbuf_add(tagbuf, tag_body, buf + len - tag_body); + } + strbuf_complete_line(tagbuf); + strbuf_add_lines(tagbuf, "# ", sig->buf, sig->len); +} + +static void fmt_merge_msg_sigs(struct strbuf *out) +{ + int i, tag_number = 0, first_tag = 0; + struct strbuf tagbuf = STRBUF_INIT; + + for (i = 0; i < origins.nr; i++) { + unsigned char *sha1 = origins.items[i].util; + enum object_type type; + unsigned long size, len; + char *buf = read_sha1_file(sha1, &type, &size); + struct strbuf sig = STRBUF_INIT; + + if (!buf || type != OBJ_TAG) + goto next; + len = parse_signature(buf, size); + + if (size == len) + ; /* merely annotated */ + else if (verify_signed_buffer(buf, len, buf + len, size - len, &sig)) { + if (!sig.len) + strbuf_addstr(&sig, "gpg verification failed.\n"); + } + + if (!tag_number++) { + fmt_tag_signature(&tagbuf, &sig, buf, len); + first_tag = i; + } else { + if (tag_number == 2) { + struct strbuf tagline = STRBUF_INIT; + strbuf_addf(&tagline, "\n# %s\n", + origins.items[first_tag].string); + strbuf_insert(&tagbuf, 0, tagline.buf, + tagline.len); + strbuf_release(&tagline); + } + strbuf_addf(&tagbuf, "\n# %s\n", + origins.items[i].string); + fmt_tag_signature(&tagbuf, &sig, buf, len); + } + strbuf_release(&sig); + next: + free(buf); + } + if (tagbuf.len) { + strbuf_addch(out, '\n'); + strbuf_addbuf(out, &tagbuf); + } + strbuf_release(&tagbuf); +} + int fmt_merge_msg(struct strbuf *in, struct strbuf *out, struct fmt_merge_msg_opts *opts) { @@ -293,6 +358,9 @@ int fmt_merge_msg(struct strbuf *in, struct strbuf *out, if (opts->add_title && srcs.nr) fmt_merge_msg_title(out, current_branch); + if (origins.nr) + fmt_merge_msg_sigs(out); + if (opts->shortlog_len) { struct commit *head; struct rev_info rev; @@ -310,8 +378,8 @@ int fmt_merge_msg(struct strbuf *in, struct strbuf *out, shortlog(origins.items[i].string, origins.items[i].util, head, &rev, opts->shortlog_len, out); } - if (out->len && out->buf[out->len-1] != '\n') - strbuf_addch(out, '\n'); + + strbuf_complete_line(out); return 0; } diff --git a/strbuf.c b/strbuf.c index 3ad2cc0..a849705 100644 --- a/strbuf.c +++ b/strbuf.c @@ -397,3 +397,17 @@ int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint) return len; } + +void strbuf_add_lines(struct strbuf *out, const char *prefix, + const char *buf, size_t size) +{ + while (size) { + const char *next = memchr(buf, '\n', size); + next = next ? (next + 1) : (buf + size); + strbuf_addstr(out, prefix); + strbuf_add(out, buf, next - buf); + size -= next - buf; + buf = next; + } + strbuf_complete_line(out); +} diff --git a/strbuf.h b/strbuf.h index 46a33f8..08fc13d 100644 --- a/strbuf.h +++ b/strbuf.h @@ -100,6 +100,14 @@ extern void strbuf_addf(struct strbuf *sb, const char *fmt, ...); __attribute__((format (printf,2,0))) extern void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap); +extern void strbuf_add_lines(struct strbuf *sb, const char *prefix, const char *buf, size_t size); + +static inline void strbuf_complete_line(struct strbuf *sb) +{ + if (sb->len && sb->buf[sb->len - 1] != '\n') + strbuf_addch(sb, '\n'); +} + extern size_t strbuf_fread(struct strbuf *, size_t, FILE *); /* XXX: if read fails, any partial read is undone */ extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint); -- 1.7.8.rc1.82.g90e080