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 (<key>|<keyAlias>)[(=|:)<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 UNUSED)
  28 {
  29         /* unset implies NULL arg, which is handled in our helper */
  30         return trailer_set_where(opt->value, arg);
  31 }
  32
  33 static int option_parse_if_exists(const struct option *opt,
  34                                   const char *arg, int unset UNUSED)
  35 {
  36         /* unset implies NULL arg, which is handled in our helper */
  37         return trailer_set_if_exists(opt->value, arg);
  38 }
  39
  40 static int option_parse_if_missing(const struct option *opt,
  41                                    const char *arg, int unset UNUSED)
  42 {
  43         /* unset implies NULL arg, which is handled in our helper */
  44         return trailer_set_if_missing(opt->value, arg);
  45 }
  46
  47 static void new_trailers_clear(struct list_head *trailers)
  48 {
  49         struct list_head *pos, *tmp;
  50         struct new_trailer_item *item;
  51
  52         list_for_each_safe(pos, tmp, trailers) {
  53                 item = list_entry(pos, struct new_trailer_item, list);
  54                 list_del(pos);
  55                 free(item);
  56         }
  57 }
  58
  59 static int option_parse_trailer(const struct option *opt,
  60                                    const char *arg, int unset)
  61 {
  62         struct list_head *trailers = opt->value;
  63         struct new_trailer_item *item;
  64
  65         if (unset) {
  66                 new_trailers_clear(trailers);
  67                 return 0;
  68         }
  69
  70         if (!arg)
  71                 return -1;
  72
  73         item = xmalloc(sizeof(*item));
  74         item->text = arg;
  75         item->where = where;
  76         item->if_exists = if_exists;
  77         item->if_missing = if_missing;
  78         list_add_tail(&item->list, trailers);
  79         return 0;
  80 }
  81
  82 static int parse_opt_parse(const struct option *opt, const char *arg,
  83                            int unset)
  84 {
  85         struct process_trailer_options *v = opt->value;
  86         v->only_trailers = 1;
  87         v->only_input = 1;
  88         v->unfold = 1;
  89         BUG_ON_OPT_NEG(unset);
  90         BUG_ON_OPT_ARG(arg);
  91         return 0;
  92 }
  93
  94 int cmd_interpret_trailers(int argc, const char **argv, const char *prefix)
  95 {
  96         struct process_trailer_options opts = PROCESS_TRAILER_OPTIONS_INIT;
  97         LIST_HEAD(trailers);
  98
  99         struct option options[] = {
 100                 OPT_BOOL(0, "in-place", &opts.in_place, N_("edit files in place")),
 101                 OPT_BOOL(0, "trim-empty", &opts.trim_empty, N_("trim empty trailers")),
 102
 103                 OPT_CALLBACK(0, "where", &where, N_("placement"),
 104                              N_("where to place the new trailer"), option_parse_where),
 105                 OPT_CALLBACK(0, "if-exists", &if_exists, N_("action"),
 106                              N_("action if trailer already exists"), option_parse_if_exists),
 107                 OPT_CALLBACK(0, "if-missing", &if_missing, N_("action"),
 108                              N_("action if trailer is missing"), option_parse_if_missing),
 109
 110                 OPT_BOOL(0, "only-trailers", &opts.only_trailers, N_("output only the trailers")),
 111                 OPT_BOOL(0, "only-input", &opts.only_input, N_("do not apply trailer.* configuration variables")),
 112                 OPT_BOOL(0, "unfold", &opts.unfold, N_("reformat multiline trailer values as single-line values")),
 113                 OPT_CALLBACK_F(0, "parse", &opts, NULL, N_("alias for --only-trailers --only-input --unfold"),
 114                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, parse_opt_parse),
 115                 OPT_BOOL(0, "no-divider", &opts.no_divider, N_("do not treat \"---\" as the end of input")),
 116                 OPT_CALLBACK(0, "trailer", &trailers, N_("trailer"),
 117                                 N_("trailer(s) to add"), option_parse_trailer),
 118                 OPT_END()
 119         };
 120
 121         git_config(git_default_config, NULL);
 122
 123         argc = parse_options(argc, argv, prefix, options,
 124                              git_interpret_trailers_usage, 0);
 125
 126         if (opts.only_input && !list_empty(&trailers))
 127                 usage_msg_opt(
 128                         _("--trailer with --only-input does not make sense"),
 129                         git_interpret_trailers_usage,
 130                         options);
 131
 132         if (argc) {
 133                 int i;
 134                 for (i = 0; i < argc; i++)
 135                         process_trailers(argv[i], &opts, &trailers);
 136         } else {
 137                 if (opts.in_place)
 138                         die(_("no input file given for in-place editing"));
 139                 process_trailers(NULL, &opts, &trailers);
 140         }
 141
 142         new_trailers_clear(&trailers);
 143
 144         return 0;
 145 }