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[thirdparty/git.git] / 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 }