builtin/fmt-merge-msg.c

   1 #include "builtin.h"
   2 #include "config.h"
   3 #include "fmt-merge-msg.h"
   4 #include "parse-options.h"
   5
   6 static const char * const fmt_merge_msg_usage[] = {
   7         N_("git fmt-merge-msg [-m <message>] [--log[=<n>] | --no-log] [--file <file>]"),
   8         NULL
   9 };
  10
  11 int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
  12 {
  13         const char *inpath = NULL;
  14         const char *message = NULL;
  15         char *into_name = NULL;
  16         int shortlog_len = -1;
  17         struct option options[] = {
  18                 { OPTION_INTEGER, 0, "log", &shortlog_len, N_("n"),
  19                   N_("populate log with at most <n> entries from shortlog"),
  20                   PARSE_OPT_OPTARG, NULL, DEFAULT_MERGE_LOG_LEN },
  21                 { OPTION_INTEGER, 0, "summary", &shortlog_len, N_("n"),
  22                   N_("alias for --log (deprecated)"),
  23                   PARSE_OPT_OPTARG | PARSE_OPT_HIDDEN, NULL,
  24                   DEFAULT_MERGE_LOG_LEN },
  25                 OPT_STRING('m', "message", &message, N_("text"),
  26                         N_("use <text> as start of message")),
  27                 OPT_STRING(0, "into-name", &into_name, N_("name"),
  28                            N_("use <name> instead of the real target branch")),
  29                 OPT_FILENAME('F', "file", &inpath, N_("file to read from")),
  30                 OPT_END()
  31         };
  32
  33         FILE *in = stdin;
  34         struct strbuf input = STRBUF_INIT, output = STRBUF_INIT;
  35         int ret;
  36         struct fmt_merge_msg_opts opts;
  37
  38         git_config(fmt_merge_msg_config, NULL);
  39         argc = parse_options(argc, argv, prefix, options, fmt_merge_msg_usage,
  40                              0);
  41         if (argc > 0)
  42                 usage_with_options(fmt_merge_msg_usage, options);
  43         if (shortlog_len < 0)
  44                 shortlog_len = (merge_log_config > 0) ? merge_log_config : 0;
  45
  46         if (inpath && strcmp(inpath, "-")) {
  47                 in = fopen(inpath, "r");
  48                 if (!in)
  49                         die_errno("cannot open '%s'", inpath);
  50         }
  51
  52         if (strbuf_read(&input, fileno(in), 0) < 0)
  53                 die_errno("could not read input file");
  54
  55         if (message)
  56                 strbuf_addstr(&output, message);
  57
  58         memset(&opts, 0, sizeof(opts));
  59         opts.add_title = !message;
  60         opts.credit_people = 1;
  61         opts.shortlog_len = shortlog_len;
  62         opts.into_name = into_name;
  63
  64         ret = fmt_merge_msg(&input, &output, &opts);
  65         if (ret)
  66                 return ret;
  67         write_in_full(STDOUT_FILENO, output.buf, output.len);
  68         return 0;
  69 }