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         int shortlog_len = -1;
  16         struct option options[] = {
  17                 { OPTION_INTEGER, 0, "log", &shortlog_len, N_("n"),
  18                   N_("populate log with at most <n> entries from shortlog"),
  19                   PARSE_OPT_OPTARG, NULL, DEFAULT_MERGE_LOG_LEN },
  20                 { OPTION_INTEGER, 0, "summary", &shortlog_len, N_("n"),
  21                   N_("alias for --log (deprecated)"),
  22                   PARSE_OPT_OPTARG | PARSE_OPT_HIDDEN, NULL,
  23                   DEFAULT_MERGE_LOG_LEN },
  24                 OPT_STRING('m', "message", &message, N_("text"),
  25                         N_("use <text> as start of message")),
  26                 OPT_FILENAME('F', "file", &inpath, N_("file to read from")),
  27                 OPT_END()
  28         };
  29
  30         FILE *in = stdin;
  31         struct strbuf input = STRBUF_INIT, output = STRBUF_INIT;
  32         int ret;
  33         struct fmt_merge_msg_opts opts;
  34
  35         git_config(fmt_merge_msg_config, NULL);
  36         argc = parse_options(argc, argv, prefix, options, fmt_merge_msg_usage,
  37                              0);
  38         if (argc > 0)
  39                 usage_with_options(fmt_merge_msg_usage, options);
  40         if (shortlog_len < 0)
  41                 shortlog_len = (merge_log_config > 0) ? merge_log_config : 0;
  42
  43         if (inpath && strcmp(inpath, "-")) {
  44                 in = fopen(inpath, "r");
  45                 if (!in)
  46                         die_errno("cannot open '%s'", inpath);
  47         }
  48
  49         if (strbuf_read(&input, fileno(in), 0) < 0)
  50                 die_errno("could not read input file");
  51
  52         if (message)
  53                 strbuf_addstr(&output, message);
  54
  55         memset(&opts, 0, sizeof(opts));
  56         opts.add_title = !message;
  57         opts.credit_people = 1;
  58         opts.shortlog_len = shortlog_len;
  59
  60         ret = fmt_merge_msg(&input, &output, &opts);
  61         if (ret)
  62                 return ret;
  63         write_in_full(STDOUT_FILENO, output.buf, output.len);
  64         return 0;
  65 }