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 "cache.h"
   9 #include "builtin.h"
  10 #include "gettext.h"
  11 #include "parse-options.h"
  12 #include "string-list.h"
  13 #include "trailer.h"
  14 #include "config.h"
  15
  16 static const char * const git_interpret_trailers_usage[] = {
  17         N_("git interpret-trailers [--in-place] [--trim-empty]\n"
  18            "                       [(--trailer <token>[(=|:)<value>])...]\n"
  19            "                       [--parse] [<file>...]"),
  20         NULL
  21 };
  22
  23 static enum trailer_where where;
  24 static enum trailer_if_exists if_exists;
  25 static enum trailer_if_missing if_missing;
  26
  27 static int option_parse_where(const struct option *opt,
  28                               const char *arg, int unset)
  29 {
  30         return trailer_set_where(&where, arg);
  31 }
  32
  33 static int option_parse_if_exists(const struct option *opt,
  34                                   const char *arg, int unset)
  35 {
  36         return trailer_set_if_exists(&if_exists, arg);
  37 }
  38
  39 static int option_parse_if_missing(const struct option *opt,
  40                                    const char *arg, int unset)
  41 {
  42         return trailer_set_if_missing(&if_missing, arg);
  43 }
  44
  45 static void new_trailers_clear(struct list_head *trailers)
  46 {
  47         struct list_head *pos, *tmp;
  48         struct new_trailer_item *item;
  49
  50         list_for_each_safe(pos, tmp, trailers) {
  51                 item = list_entry(pos, struct new_trailer_item, list);
  52                 list_del(pos);
  53                 free(item);
  54         }
  55 }
  56
  57 static int option_parse_trailer(const struct option *opt,
  58                                    const char *arg, int unset)
  59 {
  60         struct list_head *trailers = opt->value;
  61         struct new_trailer_item *item;
  62
  63         if (unset) {
  64                 new_trailers_clear(trailers);
  65                 return 0;
  66         }
  67
  68         if (!arg)
  69                 return -1;
  70
  71         item = xmalloc(sizeof(*item));
  72         item->text = arg;
  73         item->where = where;
  74         item->if_exists = if_exists;
  75         item->if_missing = if_missing;
  76         list_add_tail(&item->list, trailers);
  77         return 0;
  78 }
  79
  80 static int parse_opt_parse(const struct option *opt, const char *arg,
  81                            int unset)
  82 {
  83         struct process_trailer_options *v = opt->value;
  84         v->only_trailers = 1;
  85         v->only_input = 1;
  86         v->unfold = 1;
  87         BUG_ON_OPT_NEG(unset);
  88         BUG_ON_OPT_ARG(arg);
  89         return 0;
  90 }
  91
  92 int cmd_interpret_trailers(int argc, const char **argv, const char *prefix)
  93 {
  94         struct process_trailer_options opts = PROCESS_TRAILER_OPTIONS_INIT;
  95         LIST_HEAD(trailers);
  96
  97         struct option options[] = {
  98                 OPT_BOOL(0, "in-place", &opts.in_place, N_("edit files in place")),
  99                 OPT_BOOL(0, "trim-empty", &opts.trim_empty, N_("trim empty trailers")),
 100
 101                 OPT_CALLBACK(0, "where", NULL, N_("action"),
 102                              N_("where to place the new trailer"), option_parse_where),
 103                 OPT_CALLBACK(0, "if-exists", NULL, N_("action"),
 104                              N_("action if trailer already exists"), option_parse_if_exists),
 105                 OPT_CALLBACK(0, "if-missing", NULL, N_("action"),
 106                              N_("action if trailer is missing"), option_parse_if_missing),
 107
 108                 OPT_BOOL(0, "only-trailers", &opts.only_trailers, N_("output only the trailers")),
 109                 OPT_BOOL(0, "only-input", &opts.only_input, N_("do not apply config rules")),
 110                 OPT_BOOL(0, "unfold", &opts.unfold, N_("join whitespace-continued values")),
 111                 OPT_CALLBACK_F(0, "parse", &opts, NULL, N_("set parsing options"),
 112                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, parse_opt_parse),
 113                 OPT_BOOL(0, "no-divider", &opts.no_divider, N_("do not treat --- specially")),
 114                 OPT_CALLBACK(0, "trailer", &trailers, N_("trailer"),
 115                                 N_("trailer(s) to add"), option_parse_trailer),
 116                 OPT_END()
 117         };
 118
 119         git_config(git_default_config, NULL);
 120
 121         argc = parse_options(argc, argv, prefix, options,
 122                              git_interpret_trailers_usage, 0);
 123
 124         if (opts.only_input && !list_empty(&trailers))
 125                 usage_msg_opt(
 126                         _("--trailer with --only-input does not make sense"),
 127                         git_interpret_trailers_usage,
 128                         options);
 129
 130         if (argc) {
 131                 int i;
 132                 for (i = 0; i < argc; i++)
 133                         process_trailers(argv[i], &opts, &trailers);
 134         } else {
 135                 if (opts.in_place)
 136                         die(_("no input file given for in-place editing"));
 137                 process_trailers(NULL, &opts, &trailers);
 138         }
 139
 140         new_trailers_clear(&trailers);
 141
 142         return 0;
 143 }