builtin/verify-tag: add --format to verify-tag

Callers of verify-tag may want to cross-check the tagname from refs/tags with the tagname from the tag object header upon GPG verification. This is to avoid tag refs that point to an incorrect object. Add a --format parameter to git verify-tag to print the formatted tag object header in addition to or instead of the --verbose or --raw GPG verification output. Signed-off-by: Santiago Torres <santiago@nyu.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Santiago Torres committed Jan 17, 2017 at 18:37 UTC ff3c8c8f124b26559232857fd37b67a0dd99600d
2 files changed +20 -4
Documentation/git-verify-tag.txt
+1 -1
@@ -8,7 +8,7 @@ git-verify-tag - Check the GPG signature of tags
8 SYNOPSIS
9 --------
10 [verse]
11 -'git verify-tag' <tag>...
11 +'git verify-tag' [--format=<format>] <tag>...
12
13 DESCRIPTION
14 -----------
builtin/verify-tag.c
+19 -3
@@ -12,9 +12,10 @@
12 #include <signal.h>
13 #include "parse-options.h"
14 #include "gpg-interface.h"
15 +#include "ref-filter.h"
16
17 static const char * const verify_tag_usage[] = {
17 - N_("git verify-tag [-v | --verbose] <tag>..."),
18 + N_("git verify-tag [-v | --verbose] [--format=<format>] <tag>..."),
19 NULL
20 };
21
@@ -30,9 +31,11 @@ int cmd_verify_tag(int argc, const char **argv, const char *prefix)
31 {
32 int i = 1, verbose = 0, had_error = 0;
33 unsigned flags = 0;
34 + char *fmt_pretty = NULL;
35 const struct option verify_tag_options[] = {
36 OPT__VERBOSE(&verbose, N_("print tag contents")),
37 OPT_BIT(0, "raw", &flags, N_("print raw gpg status output"), GPG_VERIFY_RAW),
38 + OPT_STRING( 0 , "format", &fmt_pretty, N_("format"), N_("format to use for the output")),
39 OPT_END()
40 };
41
@@ -46,13 +49,26 @@ int cmd_verify_tag(int argc, const char **argv, const char *prefix)
49 if (verbose)
50 flags |= GPG_VERIFY_VERBOSE;
51
52 + if (fmt_pretty) {
53 + verify_ref_format(fmt_pretty);
54 + flags |= GPG_VERIFY_OMIT_STATUS;
55 + }
56 +
57 while (i < argc) {
58 unsigned char sha1[20];
59 const char *name = argv[i++];
52 - if (get_sha1(name, sha1))
60 + if (get_sha1(name, sha1)) {
61 had_error = !!error("tag '%s' not found.", name);
54 - else if (gpg_verify_tag(sha1, name, flags))
62 + continue;
63 + }
64 +
65 + if (gpg_verify_tag(sha1, name, flags)) {
66 had_error = 1;
67 + continue;
68 + }
69 +
70 + if (fmt_pretty)
71 + pretty_print_ref(name, sha1, fmt_pretty);
72 }
73 return had_error;
74 }