transport-helper: drop read/write errno checks
[git.git] / parse-options-cb.c
blob8c9edce52f63bcb1085b119b3a2264a97b1fb374
1 #include "git-compat-util.h"
2 #include "parse-options.h"
3 #include "cache.h"
4 #include "commit.h"
5 #include "color.h"
6 #include "string-list.h"
7 #include "argv-array.h"
8 #include "sha1-array.h"
10 /*----- some often used options -----*/
12 int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
14 int v;
16 if (!arg) {
17 v = unset ? 0 : DEFAULT_ABBREV;
18 } else {
19 v = strtol(arg, (char **)&arg, 10);
20 if (*arg)
21 return opterror(opt, "expects a numerical value", 0);
22 if (v && v < MINIMUM_ABBREV)
23 v = MINIMUM_ABBREV;
24 else if (v > 40)
25 v = 40;
27 *(int *)(opt->value) = v;
28 return 0;
31 int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
32 int unset)
34 if (unset)
35 arg = "never";
36 if (parse_expiry_date(arg, (timestamp_t *)opt->value))
37 die(_("malformed expiration date '%s'"), arg);
38 return 0;
41 int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
42 int unset)
44 int value;
46 if (!arg)
47 arg = unset ? "never" : (const char *)opt->defval;
48 value = git_config_colorbool(NULL, arg);
49 if (value < 0)
50 return opterror(opt,
51 "expects \"always\", \"auto\", or \"never\"", 0);
52 *(int *)opt->value = value;
53 return 0;
56 int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
57 int unset)
59 int *target = opt->value;
61 BUG_ON_OPT_ARG(arg);
63 if (unset)
64 /* --no-quiet, --no-verbose */
65 *target = 0;
66 else if (opt->short_name == 'v') {
67 if (*target >= 0)
68 (*target)++;
69 else
70 *target = 1;
71 } else {
72 if (*target <= 0)
73 (*target)--;
74 else
75 *target = -1;
77 return 0;
80 int parse_opt_commits(const struct option *opt, const char *arg, int unset)
82 struct object_id oid;
83 struct commit *commit;
85 BUG_ON_OPT_NEG(unset);
87 if (!arg)
88 return -1;
89 if (get_oid(arg, &oid))
90 return error("malformed object name %s", arg);
91 commit = lookup_commit_reference(the_repository, &oid);
92 if (!commit)
93 return error("no such commit %s", arg);
94 commit_list_insert(commit, opt->value);
95 return 0;
98 int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
100 struct object_id oid;
102 if (unset) {
103 oid_array_clear(opt->value);
104 return 0;
106 if (!arg)
107 return -1;
108 if (get_oid(arg, &oid))
109 return error(_("malformed object name '%s'"), arg);
110 oid_array_append(opt->value, &oid);
111 return 0;
114 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
116 int *target = opt->value;
118 BUG_ON_OPT_ARG(arg);
120 *target = unset ? 2 : 1;
121 return 0;
124 struct option *parse_options_concat(struct option *a, struct option *b)
126 struct option *ret;
127 size_t i, a_len = 0, b_len = 0;
129 for (i = 0; a[i].type != OPTION_END; i++)
130 a_len++;
131 for (i = 0; b[i].type != OPTION_END; i++)
132 b_len++;
134 ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
135 for (i = 0; i < a_len; i++)
136 ret[i] = a[i];
137 for (i = 0; i < b_len; i++)
138 ret[a_len + i] = b[i];
139 ret[a_len + b_len] = b[b_len]; /* final OPTION_END */
141 return ret;
144 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
146 struct string_list *v = opt->value;
148 if (unset) {
149 string_list_clear(v, 0);
150 return 0;
153 if (!arg)
154 return -1;
156 string_list_append(v, arg);
157 return 0;
160 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
162 return 0;
166 * Report that the option is unknown, so that other code can handle
167 * it. This can be used as a callback together with
168 * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
169 * "-h" output even if it's not being handled directly by
170 * parse_options().
172 int parse_opt_unknown_cb(const struct option *opt, const char *arg, int unset)
174 return -2;
178 * Recreates the command-line option in the strbuf.
180 static int recreate_opt(struct strbuf *sb, const struct option *opt,
181 const char *arg, int unset)
183 strbuf_reset(sb);
185 if (opt->long_name) {
186 strbuf_addstr(sb, unset ? "--no-" : "--");
187 strbuf_addstr(sb, opt->long_name);
188 if (arg) {
189 strbuf_addch(sb, '=');
190 strbuf_addstr(sb, arg);
192 } else if (opt->short_name && !unset) {
193 strbuf_addch(sb, '-');
194 strbuf_addch(sb, opt->short_name);
195 if (arg)
196 strbuf_addstr(sb, arg);
197 } else
198 return -1;
200 return 0;
204 * For an option opt, recreates the command-line option in opt->value which
205 * must be an char* initialized to NULL. This is useful when we need to pass
206 * the command-line option to another command. Since any previous value will be
207 * overwritten, this callback should only be used for options where the last
208 * one wins.
210 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
212 static struct strbuf sb = STRBUF_INIT;
213 char **opt_value = opt->value;
215 if (recreate_opt(&sb, opt, arg, unset) < 0)
216 return -1;
218 free(*opt_value);
220 *opt_value = strbuf_detach(&sb, NULL);
222 return 0;
226 * For an option opt, recreate the command-line option, appending it to
227 * opt->value which must be a argv_array. This is useful when we need to pass
228 * the command-line option, which can be specified multiple times, to another
229 * command.
231 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
233 static struct strbuf sb = STRBUF_INIT;
234 struct argv_array *opt_value = opt->value;
236 if (recreate_opt(&sb, opt, arg, unset) < 0)
237 return -1;
239 argv_array_push(opt_value, sb.buf);
241 return 0;