builtin/fmt-merge-msg.c

   1 #include "builtin.h"
   2 #include "config.h"
   3 #include "fmt-merge-msg.h"
   4 #include "gettext.h"
   5 #include "parse-options.h"
   6 #include "wrapper.h"
   7
   8 static const char * const fmt_merge_msg_usage[] = {
   9         N_("git fmt-merge-msg [-m <message>] [--log[=<n>] | --no-log] [--file <file>]"),
  10         NULL
  11 };
  12
  13 int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
  14 {
  15         const char *inpath = NULL;
  16         const char *message = NULL;
  17         char *into_name = NULL;
  18         int shortlog_len = -1;
  19         struct option options[] = {
  20                 { OPTION_INTEGER, 0, "log", &shortlog_len, N_("n"),
  21                   N_("populate log with at most <n> entries from shortlog"),
  22                   PARSE_OPT_OPTARG, NULL, DEFAULT_MERGE_LOG_LEN },
  23                 { OPTION_INTEGER, 0, "summary", &shortlog_len, N_("n"),
  24                   N_("alias for --log (deprecated)"),
  25                   PARSE_OPT_OPTARG | PARSE_OPT_HIDDEN, NULL,
  26                   DEFAULT_MERGE_LOG_LEN },
  27                 OPT_STRING('m', "message", &message, N_("text"),
  28                         N_("use <text> as start of message")),
  29                 OPT_STRING(0, "into-name", &into_name, N_("name"),
  30                            N_("use <name> instead of the real target branch")),
  31                 OPT_FILENAME('F', "file", &inpath, N_("file to read from")),
  32                 OPT_END()
  33         };
  34
  35         FILE *in = stdin;
  36         struct strbuf input = STRBUF_INIT, output = STRBUF_INIT;
  37         int ret;
  38         struct fmt_merge_msg_opts opts;
  39
  40         git_config(fmt_merge_msg_config, NULL);
  41         argc = parse_options(argc, argv, prefix, options, fmt_merge_msg_usage,
  42                              0);
  43         if (argc > 0)
  44                 usage_with_options(fmt_merge_msg_usage, options);
  45         if (shortlog_len < 0)
  46                 shortlog_len = (merge_log_config > 0) ? merge_log_config : 0;
  47
  48         if (inpath && strcmp(inpath, "-")) {
  49                 in = fopen(inpath, "r");
  50                 if (!in)
  51                         die_errno("cannot open '%s'", inpath);
  52         }
  53
  54         if (strbuf_read(&input, fileno(in), 0) < 0)
  55                 die_errno("could not read input file");
  56
  57         if (message)
  58                 strbuf_addstr(&output, message);
  59
  60         memset(&opts, 0, sizeof(opts));
  61         opts.add_title = !message;
  62         opts.credit_people = 1;
  63         opts.shortlog_len = shortlog_len;
  64         opts.into_name = into_name;
  65
  66         ret = fmt_merge_msg(&input, &output, &opts);
  67         if (ret)
  68                 return ret;
  69         write_in_full(STDOUT_FILENO, output.buf, output.len);
  70         return 0;
  71 }