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