git

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/*
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 * Another stupid program, this one parsing the headers of an
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 * email to figure out authorship and subject
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 */
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#include "builtin.h"
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#include "abspath.h"
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#include "environment.h"
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#include "gettext.h"
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#include "strbuf.h"
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#include "mailinfo.h"
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#include "parse-options.h"
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static const char * const mailinfo_usage[] = {
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	/* TRANSLATORS: keep <> in "<" mail ">" info. */
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	N_("git mailinfo [<options>] <msg> <patch> < mail >info"),
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	NULL,
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};
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struct metainfo_charset
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{
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	enum {
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		CHARSET_DEFAULT,
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		CHARSET_NO_REENCODE,
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		CHARSET_EXPLICIT,
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	} policy;
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	const char *charset;
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};
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static int parse_opt_explicit_encoding(const struct option *opt,
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				       const char *arg, int unset)
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{
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	struct metainfo_charset *meta_charset = opt->value;
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	BUG_ON_OPT_NEG(unset);
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	meta_charset->policy = CHARSET_EXPLICIT;
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	meta_charset->charset = arg;
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	return 0;
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}
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static int parse_opt_quoted_cr(const struct option *opt, const char *arg, int unset)
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{
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	BUG_ON_OPT_NEG(unset);
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	if (mailinfo_parse_quoted_cr_action(arg, opt->value) != 0)
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		return error(_("bad action '%s' for '%s'"), arg, "--quoted-cr");
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	return 0;
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}
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int cmd_mailinfo(int argc, const char **argv, const char *prefix)
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{
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	struct metainfo_charset meta_charset;
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	struct mailinfo mi;
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	int status;
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	char *msgfile, *patchfile;
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	struct option options[] = {
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		OPT_BOOL('k', NULL, &mi.keep_subject, N_("keep subject")),
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		OPT_BOOL('b', NULL, &mi.keep_non_patch_brackets_in_subject,
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			 N_("keep non patch brackets in subject")),
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		OPT_BOOL('m', "message-id", &mi.add_message_id,
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			 N_("copy Message-ID to the end of commit message")),
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		OPT_SET_INT_F('u', NULL, &meta_charset.policy,
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			      N_("re-code metadata to i18n.commitEncoding"),
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			      CHARSET_DEFAULT, PARSE_OPT_NONEG),
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		OPT_SET_INT_F('n', NULL, &meta_charset.policy,
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			      N_("disable charset re-coding of metadata"),
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			      CHARSET_NO_REENCODE, PARSE_OPT_NONEG),
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		OPT_CALLBACK_F(0, "encoding", &meta_charset, N_("encoding"),
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			       N_("re-code metadata to this encoding"),
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			       PARSE_OPT_NONEG, parse_opt_explicit_encoding),
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		OPT_BOOL(0, "scissors", &mi.use_scissors, N_("use scissors")),
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		OPT_CALLBACK_F(0, "quoted-cr", &mi.quoted_cr, N_("<action>"),
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			       N_("action when quoted CR is found"),
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			       PARSE_OPT_NONEG, parse_opt_quoted_cr),
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		OPT_HIDDEN_BOOL(0, "inbody-headers", &mi.use_inbody_headers,
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			 N_("use headers in message's body")),
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		OPT_END()
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	};
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	setup_mailinfo(&mi);
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	meta_charset.policy = CHARSET_DEFAULT;
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	argc = parse_options(argc, argv, prefix, options, mailinfo_usage, 0);
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	if (argc != 2)
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		usage_with_options(mailinfo_usage, options);
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	switch (meta_charset.policy) {
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	case CHARSET_DEFAULT:
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		mi.metainfo_charset = get_commit_output_encoding();
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		break;
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	case CHARSET_NO_REENCODE:
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		mi.metainfo_charset = NULL;
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		break;
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	case CHARSET_EXPLICIT:
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		break;
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	default:
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		BUG("invalid meta_charset.policy");
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	}
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	mi.input = stdin;
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	mi.output = stdout;
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	msgfile = prefix_filename(prefix, argv[0]);
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	patchfile = prefix_filename(prefix, argv[1]);
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	status = !!mailinfo(&mi, msgfile, patchfile);
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	clear_mailinfo(&mi);
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	free(msgfile);
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	free(patchfile);
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	return status;
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}
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