1 /*
2  * Another stupid program, this one parsing the headers of an
3  * email to figure out authorship and subject
4  */
5 #include "cache.h"
6 #include "builtin.h"
7 #include "utf8.h"
8 #include "strbuf.h"
9 #include "mailinfo.h"
10 #include "parse-options.h"
11 
12 static const char * const mailinfo_usage[] = {
13 	/* TRANSLATORS: keep <> in "<" mail ">" info. */
14 	N_("git mailinfo [<options>] <msg> <patch> < mail >info"),
15 	NULL,
16 };
17 
18 struct metainfo_charset
19 {
20 	enum {
21 		CHARSET_DEFAULT,
22 		CHARSET_NO_REENCODE,
23 		CHARSET_EXPLICIT,
24 	} policy;
25 	const char *charset;
26 };
27 
28 static int parse_opt_explicit_encoding(const struct option *opt,
29 				       const char *arg, int unset)
30 {
31 	struct metainfo_charset *meta_charset = opt->value;
32 
33 	BUG_ON_OPT_NEG(unset);
34 
35 	meta_charset->policy = CHARSET_EXPLICIT;
36 	meta_charset->charset = arg;
37 
38 	return 0;
39 }
40 
41 static int parse_opt_quoted_cr(const struct option *opt, const char *arg, int unset)
42 {
43 	BUG_ON_OPT_NEG(unset);
44 
45 	if (mailinfo_parse_quoted_cr_action(arg, opt->value) != 0)
46 		return error(_("bad action '%s' for '%s'"), arg, "--quoted-cr");
47 	return 0;
48 }
49 
50 int cmd_mailinfo(int argc, const char **argv, const char *prefix)
51 {
52 	struct metainfo_charset meta_charset;
53 	struct mailinfo mi;
54 	int status;
55 	char *msgfile, *patchfile;
56 
57 	struct option options[] = {
58 		OPT_BOOL('k', NULL, &mi.keep_subject, N_("keep subject")),
59 		OPT_BOOL('b', NULL, &mi.keep_non_patch_brackets_in_subject,
60 			 N_("keep non patch brackets in subject")),
61 		OPT_BOOL('m', "message-id", &mi.add_message_id,
62 			 N_("copy Message-ID to the end of commit message")),
63 		OPT_SET_INT_F('u', NULL, &meta_charset.policy,
64 			      N_("re-code metadata to i18n.commitEncoding"),
65 			      CHARSET_DEFAULT, PARSE_OPT_NONEG),
66 		OPT_SET_INT_F('n', NULL, &meta_charset.policy,
67 			      N_("disable charset re-coding of metadata"),
68 			      CHARSET_NO_REENCODE, PARSE_OPT_NONEG),
69 		OPT_CALLBACK_F(0, "encoding", &meta_charset, N_("encoding"),
70 			       N_("re-code metadata to this encoding"),
71 			       PARSE_OPT_NONEG, parse_opt_explicit_encoding),
72 		OPT_BOOL(0, "scissors", &mi.use_scissors, N_("use scissors")),
73 		OPT_CALLBACK_F(0, "quoted-cr", &mi.quoted_cr, N_("<action>"),
74 			       N_("action when quoted CR is found"),
75 			       PARSE_OPT_NONEG, parse_opt_quoted_cr),
76 		OPT_HIDDEN_BOOL(0, "inbody-headers", &mi.use_inbody_headers,
77 			 N_("use headers in message's body")),
78 		OPT_END()
79 	};
80 
81 	setup_mailinfo(&mi);
82 	meta_charset.policy = CHARSET_DEFAULT;
83 
84 	argc = parse_options(argc, argv, prefix, options, mailinfo_usage, 0);
85 
86 	if (argc != 2)
87 		usage_with_options(mailinfo_usage, options);
88 
89 	switch (meta_charset.policy) {
90 	case CHARSET_DEFAULT:
91 		mi.metainfo_charset = get_commit_output_encoding();
92 		break;
93 	case CHARSET_NO_REENCODE:
94 		mi.metainfo_charset = NULL;
95 		break;
96 	case CHARSET_EXPLICIT:
97 		break;
98 	default:
99 		BUG("invalid meta_charset.policy");
100 	}
101 
102 	mi.input = stdin;
103 	mi.output = stdout;
104 
105 	msgfile = prefix_filename(prefix, argv[0]);
106 	patchfile = prefix_filename(prefix, argv[1]);
107 
108 	status = !!mailinfo(&mi, msgfile, patchfile);
109 	clear_mailinfo(&mi);
110 
111 	free(msgfile);
112 	free(patchfile);
113 	return status;
114 }
115