git

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#include "builtin.h"
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#include "config.h"
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#include "fmt-merge-msg.h"
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#include "gettext.h"
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#include "parse-options.h"
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static const char * const fmt_merge_msg_usage[] = {
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	N_("git fmt-merge-msg [-m <message>] [--log[=<n>] | --no-log] [--file <file>]"),
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	NULL
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};
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int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
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{
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	char *inpath = NULL;
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	const char *message = NULL;
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	char *into_name = NULL;
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	int shortlog_len = -1;
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	struct option options[] = {
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		{ OPTION_INTEGER, 0, "log", &shortlog_len, N_("n"),
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		  N_("populate log with at most <n> entries from shortlog"),
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		  PARSE_OPT_OPTARG, NULL, DEFAULT_MERGE_LOG_LEN },
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		{ OPTION_INTEGER, 0, "summary", &shortlog_len, N_("n"),
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		  N_("alias for --log (deprecated)"),
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		  PARSE_OPT_OPTARG | PARSE_OPT_HIDDEN, NULL,
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		  DEFAULT_MERGE_LOG_LEN },
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		OPT_STRING('m', "message", &message, N_("text"),
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			N_("use <text> as start of message")),
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		OPT_STRING(0, "into-name", &into_name, N_("name"),
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			   N_("use <name> instead of the real target branch")),
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		OPT_FILENAME('F', "file", &inpath, N_("file to read from")),
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		OPT_END()
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	};
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	FILE *in = stdin;
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	struct strbuf input = STRBUF_INIT, output = STRBUF_INIT;
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	int ret;
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	struct fmt_merge_msg_opts opts;
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	git_config(fmt_merge_msg_config, NULL);
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	argc = parse_options(argc, argv, prefix, options, fmt_merge_msg_usage,
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			     0);
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	if (argc > 0)
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		usage_with_options(fmt_merge_msg_usage, options);
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	if (shortlog_len < 0)
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		shortlog_len = (merge_log_config > 0) ? merge_log_config : 0;
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	if (inpath && strcmp(inpath, "-")) {
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		in = fopen(inpath, "r");
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		if (!in)
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			die_errno("cannot open '%s'", inpath);
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	}
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	if (strbuf_read(&input, fileno(in), 0) < 0)
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		die_errno("could not read input file");
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	if (message)
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		strbuf_addstr(&output, message);
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	memset(&opts, 0, sizeof(opts));
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	opts.add_title = !message;
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	opts.credit_people = 1;
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	opts.shortlog_len = shortlog_len;
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	opts.into_name = into_name;
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	ret = fmt_merge_msg(&input, &output, &opts);
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	if (ret)
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		return ret;
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	write_in_full(STDOUT_FILENO, output.buf, output.len);
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	free(inpath);
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	return 0;
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}
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