unpack-trees: allow Porcelain to give different error messages

diff --git a/parse-options.c b/parse-options.c
index d9562ba5047ff1c9994755a4dbec5162b551c788..acf3fe3a1a82cd99e7bd6e0ff9d6d3d7e344a155 100644 (file)
--- a/parse-options.c
+++ b/parse-options.c
@@ -6,7 +6,8 @@
 
 struct optparse_t {
        const char **argv;
-       int argc;
+       const char **out;
+       int argc, cpidx;
        const char *opt;
 };
 
@@ -159,6 +160,16 @@ static int parse_long_opt(struct optparse_t *p, const char *arg,
                        continue;
 
                rest = skip_prefix(arg, options->long_name);
+               if (options->type == OPTION_ARGUMENT) {
+                       if (!rest)
+                               continue;
+                       if (*rest == '=')
+                               return opterror(options, "takes no value", flags);
+                       if (*rest)
+                               continue;
+                       p->out[p->cpidx++] = arg - 2;
+                       return 0;
+               }
                if (!rest) {
                        /* abbreviated? */
                        if (!strncmp(options->long_name, arg, arg_end - arg)) {
@@ -242,14 +253,15 @@ static NORETURN void usage_with_options_internal(const char * const *,
 int parse_options(int argc, const char **argv, const struct option *options,
                   const char * const usagestr[], int flags)
 {
-       struct optparse_t args = { argv + 1, argc - 1, NULL };
-       int j = 0;
+       struct optparse_t args = { argv + 1, argv, argc - 1, 0, NULL };
 
        for (; args.argc; args.argc--, args.argv++) {
                const char *arg = args.argv[0];
 
                if (*arg != '-' || !arg[1]) {
-                       argv[j++] = args.argv[0];
+                       if (flags & PARSE_OPT_STOP_AT_NON_OPTION)
+                               break;
+                       args.out[args.cpidx++] = args.argv[0];
                        continue;
                }
 
@@ -286,9 +298,9 @@ int parse_options(int argc, const char **argv, const struct option *options,
                        usage_with_options(usagestr, options);
        }
 
-       memmove(argv + j, args.argv, args.argc * sizeof(*argv));
-       argv[j + args.argc] = NULL;
-       return j + args.argc;
+       memmove(args.out + args.cpidx, args.argv, args.argc * sizeof(*args.out));
+       args.out[args.cpidx + args.argc] = NULL;
+       return args.cpidx + args.argc;
 }
 
 #define USAGE_OPTS_WIDTH 24
@@ -328,9 +340,11 @@ void usage_with_options_internal(const char * const *usagestr,
                        pos += fprintf(stderr, "--%s", opts->long_name);
 
                switch (opts->type) {
+               case OPTION_ARGUMENT:
+                       break;
                case OPTION_INTEGER:
                        if (opts->flags & PARSE_OPT_OPTARG)
-                               pos += fprintf(stderr, " [<n>]");
+                               pos += fprintf(stderr, "[<n>]");
                        else
                                pos += fprintf(stderr, " <n>");
                        break;
@@ -395,3 +409,10 @@ int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
        *(int *)(opt->value) = v;
        return 0;
 }
+
+int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
+                            int unset)
+{
+       *(unsigned long *)(opt->value) = approxidate(arg);
+       return 0;
+}