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[git/git.git] / parse-options.h
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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,
b04ba2bb 13 OPTION_COUNTUP,
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14 OPTION_SET_INT,
15 OPTION_SET_PTR,
11588263 16 OPTION_CMDMODE,
db7244bd 17 /* options with arguments (usually) */
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18 OPTION_STRING,
19 OPTION_INTEGER,
ffe659f9 20 OPTION_CALLBACK,
b0b3a8b6 21 OPTION_LOWLEVEL_CALLBACK,
df217ed6 22 OPTION_FILENAME
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23};
24
25enum parse_opt_flags {
26 PARSE_OPT_KEEP_DASHDASH = 1,
a0ec9d25 27 PARSE_OPT_STOP_AT_NON_OPTION = 2,
a32a4eaa 28 PARSE_OPT_KEEP_ARGV0 = 4,
b5ce3a54 29 PARSE_OPT_KEEP_UNKNOWN = 8,
4b05548f 30 PARSE_OPT_NO_INTERNAL_HELP = 16
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31};
32
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33enum parse_opt_option_flags {
34 PARSE_OPT_OPTARG = 1,
f481e22a 35 PARSE_OPT_NOARG = 2,
db7244bd 36 PARSE_OPT_NONEG = 4,
dd3bf0f4 37 PARSE_OPT_HIDDEN = 8,
1cc6985c 38 PARSE_OPT_LASTARG_DEFAULT = 16,
51a9949e 39 PARSE_OPT_NODASH = 32,
29f25d49 40 PARSE_OPT_LITERAL_ARGHELP = 64,
47e9cd28 41 PARSE_OPT_SHELL_EVAL = 256
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42};
43
44struct option;
45typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
46
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47struct parse_opt_ctx_t;
48typedef int parse_opt_ll_cb(struct parse_opt_ctx_t *ctx,
49 const struct option *opt, int unset);
50
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51/*
52 * `type`::
53 * holds the type of the option, you must have an OPTION_END last in your
54 * array.
55 *
56 * `short_name`::
57 * the character to use as a short option name, '\0' if none.
58 *
59 * `long_name`::
60 * the long option name, without the leading dashes, NULL if none.
61 *
62 * `value`::
63 * stores pointers to the values to be filled.
64 *
65 * `argh`::
66 * token to explain the kind of argument this option wants. Keep it
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67 * homogeneous across the repository. Should be wrapped by N_() for
68 * translation.
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69 *
70 * `help`::
71 * the short help associated to what the option does.
72 * Must never be NULL (except for OPTION_END).
73 * OPTION_GROUP uses this pointer to store the group header.
54e6dc7d 74 * Should be wrapped by N_() for translation.
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75 *
76 * `flags`::
77 * mask of parse_opt_option_flags.
3ea3c215 78 * PARSE_OPT_OPTARG: says that the argument is optional (not for BOOLEANs)
ef45e4da 79 * PARSE_OPT_NOARG: says that this option does not take an argument
db7244bd 80 * PARSE_OPT_NONEG: says that this option cannot be negated
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81 * PARSE_OPT_HIDDEN: this option is skipped in the default usage, and
82 * shown only in the full usage.
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83 * PARSE_OPT_LASTARG_DEFAULT: says that this option will take the default
84 * value if no argument is given when the option
85 * is last on the command line. If the option is
86 * not last it will require an argument.
87 * Should not be used with PARSE_OPT_OPTARG.
51a9949e 88 * PARSE_OPT_NODASH: this option doesn't start with a dash.
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89 * PARSE_OPT_LITERAL_ARGHELP: says that argh shouldn't be enclosed in brackets
90 * (i.e. '<argh>') in the help message.
91 * Useful for options with multiple parameters.
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92 *
93 * `callback`::
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94 * pointer to the callback to use for OPTION_CALLBACK or
95 * OPTION_LOWLEVEL_CALLBACK.
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96 *
97 * `defval`::
98 * default value to fill (*->value) with for PARSE_OPT_OPTARG.
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99 * OPTION_{BIT,SET_INT,SET_PTR} store the {mask,integer,pointer} to put in
100 * the value when met.
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101 * CALLBACKS can use it like they want.
102 */
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103struct option {
104 enum parse_opt_type type;
105 int short_name;
106 const char *long_name;
107 void *value;
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108 const char *argh;
109 const char *help;
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110
111 int flags;
112 parse_opt_cb *callback;
ffe659f9 113 intptr_t defval;
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114};
115
116#define OPT_END() { OPTION_END }
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117#define OPT_ARGUMENT(l, h) { OPTION_ARGUMENT, 0, (l), NULL, NULL, \
118 (h), PARSE_OPT_NOARG}
d7a38c54 119#define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) }
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120#define OPT_BIT(s, l, v, h, b) { OPTION_BIT, (s), (l), (v), NULL, (h), \
121 PARSE_OPT_NOARG, NULL, (b) }
122#define OPT_NEGBIT(s, l, v, h, b) { OPTION_NEGBIT, (s), (l), (v), NULL, \
123 (h), PARSE_OPT_NOARG, NULL, (b) }
b04ba2bb 124#define OPT_COUNTUP(s, l, v, h) { OPTION_COUNTUP, (s), (l), (v), NULL, \
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125 (h), PARSE_OPT_NOARG }
126#define OPT_SET_INT(s, l, v, h, i) { OPTION_SET_INT, (s), (l), (v), NULL, \
127 (h), PARSE_OPT_NOARG, NULL, (i) }
b04ba2bb 128#define OPT_BOOL(s, l, v, h) OPT_SET_INT(s, l, v, h, 1)
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129#define OPT_HIDDEN_BOOL(s, l, v, h) { OPTION_SET_INT, (s), (l), (v), NULL, \
130 (h), PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1}
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131#define OPT_SET_PTR(s, l, v, h, p) { OPTION_SET_PTR, (s), (l), (v), NULL, \
132 (h), PARSE_OPT_NOARG, NULL, (p) }
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133#define OPT_CMDMODE(s, l, v, h, i) { OPTION_CMDMODE, (s), (l), (v), NULL, \
134 (h), PARSE_OPT_NOARG|PARSE_OPT_NONEG, NULL, (i) }
54e6dc7d 135#define OPT_INTEGER(s, l, v, h) { OPTION_INTEGER, (s), (l), (v), N_("n"), (h) }
d7a38c54 136#define OPT_STRING(s, l, v, a, h) { OPTION_STRING, (s), (l), (v), (a), (h) }
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137#define OPT_STRING_LIST(s, l, v, a, h) \
138 { OPTION_CALLBACK, (s), (l), (v), (a), \
139 (h), 0, &parse_opt_string_list }
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140#define OPT_UYN(s, l, v, h) { OPTION_CALLBACK, (s), (l), (v), NULL, \
141 (h), PARSE_OPT_NOARG, &parse_opt_tertiary }
1f4a711a 142#define OPT_DATE(s, l, v, h) \
54e6dc7d 143 { OPTION_CALLBACK, (s), (l), (v), N_("time"),(h), 0, \
1f4a711a 144 parse_opt_approxidate_cb }
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145#define OPT_EXPIRY_DATE(s, l, v, h) \
146 { OPTION_CALLBACK, (s), (l), (v), N_("expiry date"),(h), 0, \
147 parse_opt_expiry_date_cb }
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148#define OPT_CALLBACK(s, l, v, a, h, f) \
149 { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) }
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150#define OPT_NUMBER_CALLBACK(v, h, f) \
151 { OPTION_NUMBER, 0, NULL, (v), NULL, (h), \
152 PARSE_OPT_NOARG | PARSE_OPT_NONEG, (f) }
df217ed6 153#define OPT_FILENAME(s, l, v, h) { OPTION_FILENAME, (s), (l), (v), \
54e6dc7d 154 N_("file"), (h) }
73e9da01 155#define OPT_COLOR_FLAG(s, l, v, h) \
54e6dc7d 156 { OPTION_CALLBACK, (s), (l), (v), N_("when"), (h), PARSE_OPT_OPTARG, \
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157 parse_opt_color_flag_cb, (intptr_t)"always" }
158
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159#define OPT_NOOP_NOARG(s, l) \
160 { OPTION_CALLBACK, (s), (l), NULL, NULL, \
54e6dc7d 161 N_("no-op (backward compatibility)"), \
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162 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, parse_opt_noop_cb }
163
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164/* Deprecated synonym */
165#define OPT_BOOLEAN OPT_COUNTUP
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166
167/* parse_options() will filter out the processed options and leave the
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168 * non-option arguments in argv[]. usagestr strings should be marked
169 * for translation with N_().
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170 * Returns the number of arguments left in argv[].
171 */
37782920 172extern int parse_options(int argc, const char **argv, const char *prefix,
4a59fd13 173 const struct option *options,
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174 const char * const usagestr[], int flags);
175
176extern NORETURN void usage_with_options(const char * const *usagestr,
177 const struct option *options);
4a59fd13 178
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179extern NORETURN void usage_msg_opt(const char *msg,
180 const char * const *usagestr,
181 const struct option *options);
182
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183extern int optbug(const struct option *opt, const char *reason);
184extern int opterror(const struct option *opt, const char *reason, int flags);
a3bc3d07 185#if defined(__GNUC__) && ! defined(__clang__)
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186#define opterror(o,r,f) (opterror((o),(r),(f)), -1)
187#endif
188
3ea3c215 189/*----- incremental advanced APIs -----*/
7e7bbcb4 190
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191enum {
192 PARSE_OPT_HELP = -1,
193 PARSE_OPT_DONE,
979240fe 194 PARSE_OPT_NON_OPTION,
4b05548f 195 PARSE_OPT_UNKNOWN
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196};
197
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198/*
199 * It's okay for the caller to consume argv/argc in the usual way.
200 * Other fields of that structure are private to parse-options and should not
201 * be modified in any way.
202 */
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203struct parse_opt_ctx_t {
204 const char **argv;
205 const char **out;
206 int argc, cpidx;
207 const char *opt;
208 int flags;
37782920 209 const char *prefix;
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210};
211
212extern void parse_options_start(struct parse_opt_ctx_t *ctx,
37782920 213 int argc, const char **argv, const char *prefix,
9ca1169f 214 const struct option *options, int flags);
7e7bbcb4 215
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216extern int parse_options_step(struct parse_opt_ctx_t *ctx,
217 const struct option *options,
218 const char * const usagestr[]);
219
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220extern int parse_options_end(struct parse_opt_ctx_t *ctx);
221
8b74d75c 222extern int parse_options_concat(struct option *dst, size_t, struct option *src);
7e7bbcb4 223
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224/*----- some often used options -----*/
225extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
1f4a711a 226extern int parse_opt_approxidate_cb(const struct option *, const char *, int);
27ec394a 227extern int parse_opt_expiry_date_cb(const struct option *, const char *, int);
73e9da01 228extern int parse_opt_color_flag_cb(const struct option *, const char *, int);
7f87aff2 229extern int parse_opt_verbosity_cb(const struct option *, const char *, int);
269defdf 230extern int parse_opt_with_commit(const struct option *, const char *, int);
cb6020bb 231extern int parse_opt_tertiary(const struct option *, const char *, int);
c8ba1639 232extern int parse_opt_string_list(const struct option *, const char *, int);
6acec038 233extern int parse_opt_noop_cb(const struct option *, const char *, int);
0ce865b1 234
fd03881a 235#define OPT__VERBOSE(var, h) OPT_BOOLEAN('v', "verbose", (var), (h))
d52ee6e6 236#define OPT__QUIET(var, h) OPT_BOOLEAN('q', "quiet", (var), (h))
7f87aff2 237#define OPT__VERBOSITY(var) \
54e6dc7d 238 { OPTION_CALLBACK, 'v', "verbose", (var), NULL, N_("be more verbose"), \
7f87aff2 239 PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \
54e6dc7d 240 { OPTION_CALLBACK, 'q', "quiet", (var), NULL, N_("be more quiet"), \
7f87aff2 241 PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }
e21adb8c 242#define OPT__DRY_RUN(var, h) OPT_BOOLEAN('n', "dry-run", (var), (h))
76946b76 243#define OPT__FORCE(var, h) OPT_BOOLEAN('f', "force", (var), (h))
0ce865b1 244#define OPT__ABBREV(var) \
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245 { OPTION_CALLBACK, 0, "abbrev", (var), N_("n"), \
246 N_("use <n> digits to display SHA-1s"), \
0ce865b1 247 PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }
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248#define OPT__COLOR(var, h) \
249 OPT_COLOR_FLAG(0, "color", (var), (h))
7e29b825 250#define OPT_COLUMN(s, l, v, h) \
a054e049 251 { OPTION_CALLBACK, (s), (l), (v), N_("style"), (h), PARSE_OPT_OPTARG, parseopt_column_callback }
0ce865b1 252
4a59fd13 253#endif