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