parse-opt: optionally show "--no-" option string

diff --git a/parse-options.c b/parse-options.c
index e469fc06faef288e9684ec2a975a944eb7268e0c..3b71fbb5410332a3f11ca0e450a614b3345a687b 100644 (file)
--- a/parse-options.c
+++ b/parse-options.c
@@ -306,6 +306,28 @@ static void check_typos(const char *arg, const struct option *options)
        }
 }
 
+static void parse_options_check(const struct option *opts)
+{
+       int err = 0;
+
+       for (; opts->type != OPTION_END; opts++) {
+               if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
+                   (opts->flags & PARSE_OPT_OPTARG)) {
+                       if (opts->long_name) {
+                               error("`--%s` uses incompatible flags "
+                                     "LASTARG_DEFAULT and OPTARG", opts->long_name);
+                       } else {
+                               error("`-%c` uses incompatible flags "
+                                     "LASTARG_DEFAULT and OPTARG", opts->short_name);
+                       }
+                       err |= 1;
+               }
+       }
+
+       if (err)
+               exit(129);
+}
+
 void parse_options_start(struct parse_opt_ctx_t *ctx,
                         int argc, const char **argv, const char *prefix,
                         int flags)
@@ -331,6 +353,8 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
 {
        int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
 
+       parse_options_check(options);
+
        /* we must reset ->opt, unknown short option leave it dangling */
        ctx->opt = NULL;
 
@@ -454,7 +478,7 @@ static int usage_argh(const struct option *opts)
 #define USAGE_OPTS_WIDTH 24
 #define USAGE_GAP         2
 
-int usage_with_options_internal(const char * const *usagestr,
+static int usage_with_options_internal(const char * const *usagestr,
                                const struct option *opts, int full)
 {
        if (!usagestr)
@@ -487,7 +511,7 @@ int usage_with_options_internal(const char * const *usagestr,
                        continue;
 
                pos = fprintf(stderr, "    ");
-               if (opts->short_name) {
+               if (opts->short_name && !(opts->flags & PARSE_OPT_NEGHELP)) {
                        if (opts->flags & PARSE_OPT_NODASH)
                                pos += fprintf(stderr, "%c", opts->short_name);
                        else
@@ -496,7 +520,9 @@ int usage_with_options_internal(const char * const *usagestr,
                if (opts->long_name && opts->short_name)
                        pos += fprintf(stderr, ", ");
                if (opts->long_name)
-                       pos += fprintf(stderr, "--%s", opts->long_name);
+                       pos += fprintf(stderr, "--%s%s",
+                               (opts->flags & PARSE_OPT_NEGHELP) ?  "no-" : "",
+                               opts->long_name);
                if (opts->type == OPTION_NUMBER)
                        pos += fprintf(stderr, "-NUM");