git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/parse-options.c b/parse-options.c
index 7a08a0c64f9f447e09ef6771d83dbf95f8f3545d..8e64316fe002fe90c58de61e4d6558ee4ad87157 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)) {
@@ -216,31 +227,58 @@ static int parse_long_opt(struct optparse_t *p, const char *arg,
        return error("unknown option `%s'", arg);
 }
 
+void check_typos(const char *arg, const struct option *options)
+{
+       if (strlen(arg) < 3)
+               return;
+
+       if (!prefixcmp(arg, "no-")) {
+               error ("did you mean `--%s` (with two dashes ?)", arg);
+               exit(129);
+       }
+
+       for (; options->type != OPTION_END; options++) {
+               if (!options->long_name)
+                       continue;
+               if (!prefixcmp(options->long_name, arg)) {
+                       error ("did you mean `--%s` (with two dashes ?)", arg);
+                       exit(129);
+               }
+       }
+}
+
 static NORETURN void usage_with_options_internal(const char * const *,
                                                  const struct option *, int);
 
 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;
                }
 
                if (arg[1] != '-') {
                        args.opt = arg + 1;
-                       do {
+                       if (*args.opt == 'h')
+                               usage_with_options(usagestr, options);
+                       if (parse_short_opt(&args, options) < 0)
+                               usage_with_options(usagestr, options);
+                       if (args.opt)
+                               check_typos(arg + 1, options);
+                       while (args.opt) {
                                if (*args.opt == 'h')
                                        usage_with_options(usagestr, options);
                                if (parse_short_opt(&args, options) < 0)
                                        usage_with_options(usagestr, options);
-                       } while (args.opt);
+                       }
                        continue;
                }
 
@@ -260,9 +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
@@ -302,6 +340,8 @@ 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>]");