builtin/interpret-trailers.c

   1 /*
   2  * Builtin "git interpret-trailers"
   3  *
   4  * Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org>
   5  *
   6  */
   7
   8 #include "builtin.h"
   9 #include "gettext.h"
  10 #include "parse-options.h"
  11 #include "string-list.h"
  12 #include "trailer.h"
  13 #include "config.h"
  14
  15 static const char * const git_interpret_trailers_usage[] = {
  16         N_("git interpret-trailers [--in-place] [--trim-empty]\n"
  17            "                       [(--trailer <token>[(=|:)<value>])...]\n"
  18            "                       [--parse] [<file>...]"),
  19         NULL
  20 };
  21
  22 static enum trailer_where where;
  23 static enum trailer_if_exists if_exists;
  24 static enum trailer_if_missing if_missing;
  25
  26 static int option_parse_where(const struct option *opt,
  27                               const char *arg, int unset)
  28 {
  29         return trailer_set_where(&where, arg);
  30 }
  31
  32 static int option_parse_if_exists(const struct option *opt,
  33                                   const char *arg, int unset)
  34 {
  35         return trailer_set_if_exists(&if_exists, arg);
  36 }
  37
  38 static int option_parse_if_missing(const struct option *opt,
  39                                    const char *arg, int unset)
  40 {
  41         return trailer_set_if_missing(&if_missing, arg);
  42 }
  43
  44 static void new_trailers_clear(struct list_head *trailers)
  45 {
  46         struct list_head *pos, *tmp;
  47         struct new_trailer_item *item;
  48
  49         list_for_each_safe(pos, tmp, trailers) {
  50                 item = list_entry(pos, struct new_trailer_item, list);
  51                 list_del(pos);
  52                 free(item);
  53         }
  54 }
  55
  56 static int option_parse_trailer(const struct option *opt,
  57                                    const char *arg, int unset)
  58 {
  59         struct list_head *trailers = opt->value;
  60         struct new_trailer_item *item;
  61
  62         if (unset) {
  63                 new_trailers_clear(trailers);
  64                 return 0;
  65         }
  66
  67         if (!arg)
  68                 return -1;
  69
  70         item = xmalloc(sizeof(*item));
  71         item->text = arg;
  72         item->where = where;
  73         item->if_exists = if_exists;
  74         item->if_missing = if_missing;
  75         list_add_tail(&item->list, trailers);
  76         return 0;
  77 }
  78
  79 static int parse_opt_parse(const struct option *opt, const char *arg,
  80                            int unset)
  81 {
  82         struct process_trailer_options *v = opt->value;
  83         v->only_trailers = 1;
  84         v->only_input = 1;
  85         v->unfold = 1;
  86         BUG_ON_OPT_NEG(unset);
  87         BUG_ON_OPT_ARG(arg);
  88         return 0;
  89 }
  90
  91 int cmd_interpret_trailers(int argc, const char **argv, const char *prefix)
  92 {
  93         struct process_trailer_options opts = PROCESS_TRAILER_OPTIONS_INIT;
  94         LIST_HEAD(trailers);
  95
  96         struct option options[] = {
  97                 OPT_BOOL(0, "in-place", &opts.in_place, N_("edit files in place")),
  98                 OPT_BOOL(0, "trim-empty", &opts.trim_empty, N_("trim empty trailers")),
  99
 100                 OPT_CALLBACK(0, "where", NULL, N_("action"),
 101                              N_("where to place the new trailer"), option_parse_where),
 102                 OPT_CALLBACK(0, "if-exists", NULL, N_("action"),
 103                              N_("action if trailer already exists"), option_parse_if_exists),
 104                 OPT_CALLBACK(0, "if-missing", NULL, N_("action"),
 105                              N_("action if trailer is missing"), option_parse_if_missing),
 106
 107                 OPT_BOOL(0, "only-trailers", &opts.only_trailers, N_("output only the trailers")),
 108                 OPT_BOOL(0, "only-input", &opts.only_input, N_("do not apply config rules")),
 109                 OPT_BOOL(0, "unfold", &opts.unfold, N_("join whitespace-continued values")),
 110                 OPT_CALLBACK_F(0, "parse", &opts, NULL, N_("set parsing options"),
 111                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, parse_opt_parse),
 112                 OPT_BOOL(0, "no-divider", &opts.no_divider, N_("do not treat --- specially")),
 113                 OPT_CALLBACK(0, "trailer", &trailers, N_("trailer"),
 114                                 N_("trailer(s) to add"), option_parse_trailer),
 115                 OPT_END()
 116         };
 117
 118         git_config(git_default_config, NULL);
 119
 120         argc = parse_options(argc, argv, prefix, options,
 121                              git_interpret_trailers_usage, 0);
 122
 123         if (opts.only_input && !list_empty(&trailers))
 124                 usage_msg_opt(
 125                         _("--trailer with --only-input does not make sense"),
 126                         git_interpret_trailers_usage,
 127                         options);
 128
 129         if (argc) {
 130                 int i;
 131                 for (i = 0; i < argc; i++)
 132                         process_trailers(argv[i], &opts, &trailers);
 133         } else {
 134                 if (opts.in_place)
 135                         die(_("no input file given for in-place editing"));
 136                 process_trailers(NULL, &opts, &trailers);
 137         }
 138
 139         new_trailers_clear(&trailers);
 140
 141         return 0;
 142 }