parse-options: add OPT_BITOP()
[git/git.git] / parse-options.h
CommitLineData
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1#ifndef PARSE_OPTIONS_H
2#define PARSE_OPTIONS_H
3
4enum parse_opt_type {
db7244bd 5 /* special types */
4a59fd13 6 OPTION_END,
580d5bff 7 OPTION_ARGUMENT,
d7a38c54 8 OPTION_GROUP,
e0319ff5 9 OPTION_NUMBER,
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10 /* options with no arguments */
11 OPTION_BIT,
2f4b97f9 12 OPTION_NEGBIT,
f62470c6 13 OPTION_BITOP,
b04ba2bb 14 OPTION_COUNTUP,
db7244bd 15 OPTION_SET_INT,
11588263 16 OPTION_CMDMODE,
db7244bd 17 /* options with arguments (usually) */
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18 OPTION_STRING,
19 OPTION_INTEGER,
2a514ed8 20 OPTION_MAGNITUDE,
ffe659f9 21 OPTION_CALLBACK,
b0b3a8b6 22 OPTION_LOWLEVEL_CALLBACK,
df217ed6 23 OPTION_FILENAME
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24};
25
26enum parse_opt_flags {
27 PARSE_OPT_KEEP_DASHDASH = 1,
a0ec9d25 28 PARSE_OPT_STOP_AT_NON_OPTION = 2,
a32a4eaa 29 PARSE_OPT_KEEP_ARGV0 = 4,
b5ce3a54 30 PARSE_OPT_KEEP_UNKNOWN = 8,
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31 PARSE_OPT_NO_INTERNAL_HELP = 16,
32 PARSE_OPT_ONE_SHOT = 32
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33};
34
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35enum parse_opt_option_flags {
36 PARSE_OPT_OPTARG = 1,
f481e22a 37 PARSE_OPT_NOARG = 2,
db7244bd 38 PARSE_OPT_NONEG = 4,
dd3bf0f4 39 PARSE_OPT_HIDDEN = 8,
1cc6985c 40 PARSE_OPT_LASTARG_DEFAULT = 16,
51a9949e 41 PARSE_OPT_NODASH = 32,
29f25d49 42 PARSE_OPT_LITERAL_ARGHELP = 64,
b9d7f4b4 43 PARSE_OPT_SHELL_EVAL = 256,
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44 PARSE_OPT_NOCOMPLETE = 512,
45 PARSE_OPT_COMP_ARG = 1024
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46};
47
48struct option;
49typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
50
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51struct parse_opt_ctx_t;
52typedef int parse_opt_ll_cb(struct parse_opt_ctx_t *ctx,
53 const struct option *opt, int unset);
54
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55/*
56 * `type`::
57 * holds the type of the option, you must have an OPTION_END last in your
58 * array.
59 *
60 * `short_name`::
61 * the character to use as a short option name, '\0' if none.
62 *
63 * `long_name`::
64 * the long option name, without the leading dashes, NULL if none.
65 *
66 * `value`::
67 * stores pointers to the values to be filled.
68 *
69 * `argh`::
70 * token to explain the kind of argument this option wants. Keep it
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71 * homogeneous across the repository. Should be wrapped by N_() for
72 * translation.
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73 *
74 * `help`::
75 * the short help associated to what the option does.
76 * Must never be NULL (except for OPTION_END).
77 * OPTION_GROUP uses this pointer to store the group header.
54e6dc7d 78 * Should be wrapped by N_() for translation.
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79 *
80 * `flags`::
81 * mask of parse_opt_option_flags.
3ea3c215 82 * PARSE_OPT_OPTARG: says that the argument is optional (not for BOOLEANs)
ef45e4da 83 * PARSE_OPT_NOARG: says that this option does not take an argument
db7244bd 84 * PARSE_OPT_NONEG: says that this option cannot be negated
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85 * PARSE_OPT_HIDDEN: this option is skipped in the default usage, and
86 * shown only in the full usage.
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87 * PARSE_OPT_LASTARG_DEFAULT: says that this option will take the default
88 * value if no argument is given when the option
89 * is last on the command line. If the option is
90 * not last it will require an argument.
91 * Should not be used with PARSE_OPT_OPTARG.
51a9949e 92 * PARSE_OPT_NODASH: this option doesn't start with a dash.
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93 * PARSE_OPT_LITERAL_ARGHELP: says that argh shouldn't be enclosed in brackets
94 * (i.e. '<argh>') in the help message.
95 * Useful for options with multiple parameters.
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96 * PARSE_OPT_NOCOMPLETE: by default all visible options are completable
97 * by git-completion.bash. This option suppresses that.
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98 * PARSE_OPT_COMP_ARG: this option forces to git-completion.bash to
99 * complete an option as --name= not --name even if
100 * the option takes optional argument.
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101 *
102 * `callback`::
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103 * pointer to the callback to use for OPTION_CALLBACK or
104 * OPTION_LOWLEVEL_CALLBACK.
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105 *
106 * `defval`::
107 * default value to fill (*->value) with for PARSE_OPT_OPTARG.
d3c08114 108 * OPTION_{BIT,SET_INT} store the {mask,integer} to put in the value when met.
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109 * CALLBACKS can use it like they want.
110 */
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111struct option {
112 enum parse_opt_type type;
113 int short_name;
114 const char *long_name;
115 void *value;
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116 const char *argh;
117 const char *help;
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118
119 int flags;
120 parse_opt_cb *callback;
ffe659f9 121 intptr_t defval;
f62470c6 122 intptr_t extra;
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123};
124
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125#define OPT_BIT_F(s, l, v, h, b, f) { OPTION_BIT, (s), (l), (v), NULL, (h), \
126 PARSE_OPT_NOARG|(f), NULL, (b) }
127#define OPT_COUNTUP_F(s, l, v, h, f) { OPTION_COUNTUP, (s), (l), (v), NULL, \
128 (h), PARSE_OPT_NOARG|(f) }
129#define OPT_SET_INT_F(s, l, v, h, i, f) { OPTION_SET_INT, (s), (l), (v), NULL, \
130 (h), PARSE_OPT_NOARG | (f), NULL, (i) }
131#define OPT_BOOL_F(s, l, v, h, f) OPT_SET_INT_F(s, l, v, h, 1, f)
132
4a59fd13 133#define OPT_END() { OPTION_END }
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134#define OPT_ARGUMENT(l, h) { OPTION_ARGUMENT, 0, (l), NULL, NULL, \
135 (h), PARSE_OPT_NOARG}
d7a38c54 136#define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) }
2de37349 137#define OPT_BIT(s, l, v, h, b) OPT_BIT_F(s, l, v, h, b, 0)
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138#define OPT_BITOP(s, l, v, h, set, clear) { OPTION_BITOP, (s), (l), (v), NULL, (h), \
139 PARSE_OPT_NOARG|PARSE_OPT_NONEG, NULL, \
140 (set), (clear) }
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141#define OPT_NEGBIT(s, l, v, h, b) { OPTION_NEGBIT, (s), (l), (v), NULL, \
142 (h), PARSE_OPT_NOARG, NULL, (b) }
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143#define OPT_COUNTUP(s, l, v, h) OPT_COUNTUP_F(s, l, v, h, 0)
144#define OPT_SET_INT(s, l, v, h, i) OPT_SET_INT_F(s, l, v, h, i, 0)
145#define OPT_BOOL(s, l, v, h) OPT_BOOL_F(s, l, v, h, 0)
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146#define OPT_HIDDEN_BOOL(s, l, v, h) { OPTION_SET_INT, (s), (l), (v), NULL, \
147 (h), PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1}
14691e38 148#define OPT_CMDMODE(s, l, v, h, i) { OPTION_CMDMODE, (s), (l), (v), NULL, \
11588263 149 (h), PARSE_OPT_NOARG|PARSE_OPT_NONEG, NULL, (i) }
54e6dc7d 150#define OPT_INTEGER(s, l, v, h) { OPTION_INTEGER, (s), (l), (v), N_("n"), (h) }
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151#define OPT_MAGNITUDE(s, l, v, h) { OPTION_MAGNITUDE, (s), (l), (v), \
152 N_("n"), (h), PARSE_OPT_NONEG }
d7a38c54 153#define OPT_STRING(s, l, v, a, h) { OPTION_STRING, (s), (l), (v), (a), (h) }
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154#define OPT_STRING_LIST(s, l, v, a, h) \
155 { OPTION_CALLBACK, (s), (l), (v), (a), \
156 (h), 0, &parse_opt_string_list }
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157#define OPT_UYN(s, l, v, h) { OPTION_CALLBACK, (s), (l), (v), NULL, \
158 (h), PARSE_OPT_NOARG, &parse_opt_tertiary }
27ec394a 159#define OPT_EXPIRY_DATE(s, l, v, h) \
e703d711 160 { OPTION_CALLBACK, (s), (l), (v), N_("expiry-date"),(h), 0, \
27ec394a 161 parse_opt_expiry_date_cb }
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162#define OPT_CALLBACK(s, l, v, a, h, f) \
163 { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) }
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164#define OPT_NUMBER_CALLBACK(v, h, f) \
165 { OPTION_NUMBER, 0, NULL, (v), NULL, (h), \
166 PARSE_OPT_NOARG | PARSE_OPT_NONEG, (f) }
df217ed6 167#define OPT_FILENAME(s, l, v, h) { OPTION_FILENAME, (s), (l), (v), \
54e6dc7d 168 N_("file"), (h) }
73e9da01 169#define OPT_COLOR_FLAG(s, l, v, h) \
54e6dc7d 170 { OPTION_CALLBACK, (s), (l), (v), N_("when"), (h), PARSE_OPT_OPTARG, \
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171 parse_opt_color_flag_cb, (intptr_t)"always" }
172
6acec038
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173#define OPT_NOOP_NOARG(s, l) \
174 { OPTION_CALLBACK, (s), (l), NULL, NULL, \
54e6dc7d 175 N_("no-op (backward compatibility)"), \
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176 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, parse_opt_noop_cb }
177
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178/*
179 * parse_options() will filter out the processed options and leave the
180 * non-option arguments in argv[]. argv0 is assumed program name and
181 * skipped.
182 *
183 * usagestr strings should be marked for translation with N_().
184 *
4a59fd13 185 * Returns the number of arguments left in argv[].
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186 *
187 * In one-shot mode, argv0 is not a program name, argv[] is left
188 * untouched and parse_options() returns the number of options
189 * processed.
4a59fd13 190 */
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191int parse_options(int argc, const char **argv, const char *prefix,
192 const struct option *options,
193 const char * const usagestr[], int flags);
d7a38c54 194
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195NORETURN void usage_with_options(const char * const *usagestr,
196 const struct option *options);
4a59fd13 197
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198NORETURN void usage_msg_opt(const char *msg,
199 const char * const *usagestr,
200 const struct option *options);
451bb210 201
1987b0b2 202int optbug(const struct option *opt, const char *reason);
9440b831 203const char *optname(const struct option *opt, int flags);
a469a101 204
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205/*
206 * Use these assertions for callbacks that expect to be called with NONEG and
207 * NOARG respectively, and do not otherwise handle the "unset" and "arg"
208 * parameters.
209 */
210#define BUG_ON_OPT_NEG(unset) do { \
211 if ((unset)) \
212 BUG("option callback does not expect negation"); \
213} while (0)
214#define BUG_ON_OPT_ARG(arg) do { \
215 if ((arg)) \
216 BUG("option callback does not expect an argument"); \
217} while (0)
218
3ea3c215 219/*----- incremental advanced APIs -----*/
7e7bbcb4 220
ee68b87a 221enum {
a92ec7ef 222 PARSE_OPT_COMPLETE = -2,
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223 PARSE_OPT_HELP = -1,
224 PARSE_OPT_DONE,
979240fe 225 PARSE_OPT_NON_OPTION,
3bb0923f 226 PARSE_OPT_ERROR,
4b05548f 227 PARSE_OPT_UNKNOWN
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228};
229
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230/*
231 * It's okay for the caller to consume argv/argc in the usual way.
232 * Other fields of that structure are private to parse-options and should not
233 * be modified in any way.
234 */
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235struct parse_opt_ctx_t {
236 const char **argv;
237 const char **out;
5ad0d3d5 238 int argc, cpidx, total;
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239 const char *opt;
240 int flags;
37782920 241 const char *prefix;
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242};
243
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244void parse_options_start(struct parse_opt_ctx_t *ctx,
245 int argc, const char **argv, const char *prefix,
246 const struct option *options, int flags);
7e7bbcb4 247
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248int parse_options_step(struct parse_opt_ctx_t *ctx,
249 const struct option *options,
250 const char * const usagestr[]);
ff43ec3e 251
1987b0b2 252int parse_options_end(struct parse_opt_ctx_t *ctx);
7e7bbcb4 253
1987b0b2 254struct option *parse_options_concat(struct option *a, struct option *b);
7e7bbcb4 255
0ce865b1 256/*----- some often used options -----*/
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257int parse_opt_abbrev_cb(const struct option *, const char *, int);
258int parse_opt_expiry_date_cb(const struct option *, const char *, int);
259int parse_opt_color_flag_cb(const struct option *, const char *, int);
260int parse_opt_verbosity_cb(const struct option *, const char *, int);
261int parse_opt_object_name(const struct option *, const char *, int);
262int parse_opt_commits(const struct option *, const char *, int);
263int parse_opt_tertiary(const struct option *, const char *, int);
264int parse_opt_string_list(const struct option *, const char *, int);
265int parse_opt_noop_cb(const struct option *, const char *, int);
266int parse_opt_unknown_cb(const struct option *, const char *, int);
267int parse_opt_passthru(const struct option *, const char *, int);
268int parse_opt_passthru_argv(const struct option *, const char *, int);
0ce865b1 269
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270#define OPT__VERBOSE(var, h) OPT_COUNTUP('v', "verbose", (var), (h))
271#define OPT__QUIET(var, h) OPT_COUNTUP('q', "quiet", (var), (h))
7f87aff2 272#define OPT__VERBOSITY(var) \
54e6dc7d 273 { OPTION_CALLBACK, 'v', "verbose", (var), NULL, N_("be more verbose"), \
7f87aff2 274 PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \
54e6dc7d 275 { OPTION_CALLBACK, 'q', "quiet", (var), NULL, N_("be more quiet"), \
7f87aff2 276 PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }
212c0a6f 277#define OPT__DRY_RUN(var, h) OPT_BOOL('n', "dry-run", (var), (h))
1224781d 278#define OPT__FORCE(var, h, f) OPT_COUNTUP_F('f', "force", (var), (h), (f))
0ce865b1 279#define OPT__ABBREV(var) \
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280 { OPTION_CALLBACK, 0, "abbrev", (var), N_("n"), \
281 N_("use <n> digits to display SHA-1s"), \
0ce865b1 282 PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }
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283#define OPT__COLOR(var, h) \
284 OPT_COLOR_FLAG(0, "color", (var), (h))
7e29b825 285#define OPT_COLUMN(s, l, v, h) \
a054e049 286 { OPTION_CALLBACK, (s), (l), (v), N_("style"), (h), PARSE_OPT_OPTARG, parseopt_column_callback }
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287#define OPT_PASSTHRU(s, l, v, a, h, f) \
288 { OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), parse_opt_passthru }
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289#define OPT_PASSTHRU_ARGV(s, l, v, a, h, f) \
290 { OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), parse_opt_passthru_argv }
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291#define _OPT_CONTAINS_OR_WITH(name, variable, help, flag) \
292 { OPTION_CALLBACK, 0, name, (variable), N_("commit"), (help), \
293 PARSE_OPT_LASTARG_DEFAULT | flag, \
294 parse_opt_commits, (intptr_t) "HEAD" \
295 }
eab98ee5 296#define OPT_CONTAINS(v, h) _OPT_CONTAINS_OR_WITH("contains", v, h, PARSE_OPT_NONEG)
ac3f5a34 297#define OPT_NO_CONTAINS(v, h) _OPT_CONTAINS_OR_WITH("no-contains", v, h, PARSE_OPT_NONEG)
eab98ee5 298#define OPT_WITH(v, h) _OPT_CONTAINS_OR_WITH("with", v, h, PARSE_OPT_HIDDEN | PARSE_OPT_NONEG)
ac3f5a34 299#define OPT_WITHOUT(v, h) _OPT_CONTAINS_OR_WITH("without", v, h, PARSE_OPT_HIDDEN | PARSE_OPT_NONEG)
0ce865b1 300
4a59fd13 301#endif