From 1158826394e162c5d45a4043ea86b04b24215555 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Tue, 30 Jul 2013 12:06:01 -0700 Subject: parse-options: add OPT_CMDMODE() This can be used to define a set of mutually exclusive "command mode" options, and automatically catch use of more than one from that set as an error. Signed-off-by: Junio C Hamano diff --git a/parse-options.c b/parse-options.c index c2cbca2..62e9b1c 100644 --- a/parse-options.c +++ b/parse-options.c @@ -43,8 +43,42 @@ static void fix_filename(const char *prefix, const char **file) *file = xstrdup(prefix_filename(prefix, strlen(prefix), *file)); } +static int opt_command_mode_error(const struct option *opt, + const struct option *all_opts, + int flags) +{ + const struct option *that; + struct strbuf message = STRBUF_INIT; + struct strbuf that_name = STRBUF_INIT; + + /* + * Find the other option that was used to set the variable + * already, and report that this is not compatible with it. + */ + for (that = all_opts; that->type != OPTION_END; that++) { + if (that == opt || + that->type != OPTION_CMDMODE || + that->value != opt->value || + that->defval != *(int *)opt->value) + continue; + + if (that->long_name) + strbuf_addf(&that_name, "--%s", that->long_name); + else + strbuf_addf(&that_name, "-%c", that->short_name); + strbuf_addf(&message, ": incompatible with %s", that_name.buf); + strbuf_release(&that_name); + opterror(opt, message.buf, flags); + strbuf_release(&message); + return -1; + } + return opterror(opt, ": incompatible with something else", flags); +} + static int get_value(struct parse_opt_ctx_t *p, - const struct option *opt, int flags) + const struct option *opt, + const struct option *all_opts, + int flags) { const char *s, *arg; const int unset = flags & OPT_UNSET; @@ -83,6 +117,16 @@ static int get_value(struct parse_opt_ctx_t *p, *(int *)opt->value = unset ? 0 : opt->defval; return 0; + case OPTION_CMDMODE: + /* + * Giving the same mode option twice, although is unnecessary, + * is not a grave error, so let it pass. + */ + if (*(int *)opt->value && *(int *)opt->value != opt->defval) + return opt_command_mode_error(opt, all_opts, flags); + *(int *)opt->value = opt->defval; + return 0; + case OPTION_SET_PTR: *(void **)opt->value = unset ? NULL : (void *)opt->defval; return 0; @@ -143,12 +187,13 @@ static int get_value(struct parse_opt_ctx_t *p, static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options) { + const struct option *all_opts = options; const struct option *numopt = NULL; for (; options->type != OPTION_END; options++) { if (options->short_name == *p->opt) { p->opt = p->opt[1] ? p->opt + 1 : NULL; - return get_value(p, options, OPT_SHORT); + return get_value(p, options, all_opts, OPT_SHORT); } /* @@ -177,6 +222,7 @@ static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *optio static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg, const struct option *options) { + const struct option *all_opts = options; const char *arg_end = strchr(arg, '='); const struct option *abbrev_option = NULL, *ambiguous_option = NULL; int abbrev_flags = 0, ambiguous_flags = 0; @@ -253,7 +299,7 @@ is_abbreviated: continue; p->opt = rest + 1; } - return get_value(p, options, flags ^ opt_flags); + return get_value(p, options, all_opts, flags ^ opt_flags); } if (ambiguous_option) @@ -265,18 +311,20 @@ is_abbreviated: (abbrev_flags & OPT_UNSET) ? "no-" : "", abbrev_option->long_name); if (abbrev_option) - return get_value(p, abbrev_option, abbrev_flags); + return get_value(p, abbrev_option, all_opts, abbrev_flags); return -2; } static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg, const struct option *options) { + const struct option *all_opts = options; + for (; options->type != OPTION_END; options++) { if (!(options->flags & PARSE_OPT_NODASH)) continue; if (options->short_name == arg[0] && arg[1] == '\0') - return get_value(p, options, OPT_SHORT); + return get_value(p, options, all_opts, OPT_SHORT); } return -2; } diff --git a/parse-options.h b/parse-options.h index c378b75..2404e06 100644 --- a/parse-options.h +++ b/parse-options.h @@ -13,6 +13,7 @@ enum parse_opt_type { OPTION_COUNTUP, OPTION_SET_INT, OPTION_SET_PTR, + OPTION_CMDMODE, /* options with arguments (usually) */ OPTION_STRING, OPTION_INTEGER, @@ -130,6 +131,8 @@ struct option { #define OPT_BOOL(s, l, v, h) OPT_SET_INT(s, l, v, h, 1) #define OPT_SET_PTR(s, l, v, h, p) { OPTION_SET_PTR, (s), (l), (v), NULL, \ (h), PARSE_OPT_NOARG, NULL, (p) } +#define OPT_CMDMODE(s, l, v, h, i) { OPTION_CMDMODE, (s), (l), (v), NULL, \ + (h), PARSE_OPT_NOARG|PARSE_OPT_NONEG, NULL, (i) } #define OPT_INTEGER(s, l, v, h) { OPTION_INTEGER, (s), (l), (v), N_("n"), (h) } #define OPT_STRING(s, l, v, a, h) { OPTION_STRING, (s), (l), (v), (a), (h) } #define OPT_STRING_LIST(s, l, v, a, h) \ -- cgit v0.10.2-6-g49f6 From e6b722db099f435f21ce72b18f0d61dc3c778f1f Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Tue, 30 Jul 2013 12:31:27 -0700 Subject: tag: use OPT_CMDMODE This is just a demonstration of how the code would look like; I do not think it is particularly easier to read than before myself. Signed-off-by: Junio C Hamano diff --git a/builtin/tag.c b/builtin/tag.c index af3af3f..d8ae5aa 100644 --- a/builtin/tag.c +++ b/builtin/tag.c @@ -436,18 +436,18 @@ int cmd_tag(int argc, const char **argv, const char *prefix) struct ref_lock *lock; struct create_tag_options opt; char *cleanup_arg = NULL; - int annotate = 0, force = 0, lines = -1, list = 0, - delete = 0, verify = 0; + int annotate = 0, force = 0, lines = -1; + int cmdmode = 0; const char *msgfile = NULL, *keyid = NULL; struct msg_arg msg = { 0, STRBUF_INIT }; struct commit_list *with_commit = NULL; struct option options[] = { - OPT_BOOLEAN('l', "list", &list, N_("list tag names")), + OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'), { OPTION_INTEGER, 'n', NULL, &lines, N_("n"), N_("print lines of each tag message"), PARSE_OPT_OPTARG, NULL, 1 }, - OPT_BOOLEAN('d', "delete", &delete, N_("delete tags")), - OPT_BOOLEAN('v', "verify", &verify, N_("verify tags")), + OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'), + OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'), OPT_GROUP(N_("Tag creation options")), OPT_BOOLEAN('a', "annotate", &annotate, @@ -489,22 +489,19 @@ int cmd_tag(int argc, const char **argv, const char *prefix) } if (opt.sign) annotate = 1; - if (argc == 0 && !(delete || verify)) - list = 1; + if (argc == 0 && !cmdmode) + cmdmode = 'l'; - if ((annotate || msg.given || msgfile || force) && - (list || delete || verify)) + if ((annotate || msg.given || msgfile || force) && (cmdmode != 0)) usage_with_options(git_tag_usage, options); - if (list + delete + verify > 1) - usage_with_options(git_tag_usage, options); finalize_colopts(&colopts, -1); - if (list && lines != -1) { + if (cmdmode == 'l' && lines != -1) { if (explicitly_enable_column(colopts)) die(_("--column and -n are incompatible")); colopts = 0; } - if (list) { + if (cmdmode == 'l') { int ret; if (column_active(colopts)) { struct column_options copts; @@ -523,9 +520,9 @@ int cmd_tag(int argc, const char **argv, const char *prefix) die(_("--contains option is only allowed with -l.")); if (points_at.nr) die(_("--points-at option is only allowed with -l.")); - if (delete) + if (cmdmode == 'd') return for_each_tag_name(argv, delete_tag); - if (verify) + if (cmdmode == 'v') return for_each_tag_name(argv, verify_tag); if (msg.given || msgfile) { -- cgit v0.10.2-6-g49f6