[PATCH 7/5] pretty: %G[?GS] placeholders
Add new placeholders related to the GPG signature on signed commits.
- %GG to show the raw verification message from GPG;
- %G? to show either "G" for Good, "B" for Bad;
- %GS to show the name of the signer.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
* The 6th is the one that works with a bogus commit with NUL in it I sent
out previously.
This concludes the series; I'll leave the design and implementation of
other useful placeholders to the list for now.
pretty.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 86 insertions(+), 0 deletions(-)
diff --git a/pretty.c b/pretty.c
index f45eb54..392d656 100644
--- a/pretty.c
+++ b/pretty.c
@@ -9,6 +9,7 @@
#include "notes.h"
#include "color.h"
#include "reflog-walk.h"
+#include "gpg-interface.h"
static char *user_format;
static struct cmt_fmt_map {
@@ -640,6 +641,12 @@ struct format_commit_context {
const struct pretty_print_context *pretty_ctx;
unsigned commit_header_parsed:1;
unsigned commit_message_parsed:1;
+ unsigned commit_signature_parsed:1;
+ struct {
+ char *gpg_output;
+ char good_bad;
+ char *signer;
+ } signature;
char *message;
size_t width, indent1, indent2;
@@ -822,6 +829,59 @@ static void rewrap_message_tail(struct strbuf *sb,
c->indent2 = new_indent2;
}
+static struct {
+ char result;
+ const char *check;
+} signature_check[] = {
+ { 'G', ": Good signature from " },
+ { 'B', ": BAD signature from " },
+};
+
+static void parse_signature_lines(struct format_commit_context *ctx)
+{
+ const char *buf = ctx->signature.gpg_output;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(signature_check); i++) {
+ const char *found = strstr(buf, signature_check[i].check);
+ const char *next;
+ if (!found)
+ continue;
+ ctx->signature.good_bad = signature_check[i].result;
+ found += strlen(signature_check[i].check);
+ next = strchrnul(found, '\n');
+ ctx->signature.signer = xmemdupz(found, next - found);
+ break;
+ }
+}
+
+static void parse_commit_signature(struct format_commit_context *ctx)
+{
+ struct strbuf payload = STRBUF_INIT;
+ struct strbuf signature = STRBUF_INIT;
+ struct strbuf gpg_output = STRBUF_INIT;
+ int status;
+
+ ctx->commit_signature_parsed = 1;
+
+ if (parse_signed_commit(ctx->commit->object.sha1,
+ &payload, &signature) <= 0)
+ goto out;
+ status = verify_signed_buffer(payload.buf, payload.len,
+ signature.buf, signature.len,
+ &gpg_output);
+ if (status && !gpg_output.len)
+ goto out;
+ ctx->signature.gpg_output = strbuf_detach(&gpg_output, NULL);
+ parse_signature_lines(ctx);
+
+ out:
+ strbuf_release(&gpg_output);
+ strbuf_release(&payload);
+ strbuf_release(&signature);
+}
+
+
static size_t format_commit_one(struct strbuf *sb, const char *placeholder,
void *context)
{
@@ -974,6 +1034,30 @@ static size_t format_commit_one(struct strbuf *sb, const char *placeholder,
return 0;
}
+ if (placeholder[0] == 'G') {
+ if (!c->commit_signature_parsed)
+ parse_commit_signature(c);
+ switch (placeholder[1]) {
+ case 'G':
+ if (c->signature.gpg_output)
+ strbuf_addstr(sb, c->signature.gpg_output);
+ break;
+ case '?':
+ switch (c->signature.good_bad) {
+ case 'G':
+ case 'B':
+ strbuf_addch(sb, c->signature.good_bad);
+ }
+ break;
+ case 'S':
+ if (c->signature.signer)
+ strbuf_addstr(sb, c->signature.signer);
+ break;
+ }
+ return 2;
+ }
+
+
/* For the rest we have to parse the commit header. */
if (!c->commit_header_parsed)
parse_commit_header(c);
@@ -1114,6 +1198,8 @@ void format_commit_message(const struct commit *commit,
if (context.message != commit->buffer)
free(context.message);
+ free(context.signature.gpg_output);
+ free(context.signature.signer);
}
static void pp_header(const struct pretty_print_context *pp,
--
1.7.7.555.g02edb3
Junio C Hamano <gitster@pobox.com>