git-bisect visualize: work in non-windowed environments better

diff --git a/builtin-rev-parse.c b/builtin-rev-parse.c
index 8d78b69c902a99738cfc337222ba71493ff45370..20d1789e0161ed3d2d18cec94b1915f518a5d662 100644 (file)
--- a/builtin-rev-parse.c
+++ b/builtin-rev-parse.c
@@ -8,6 +8,7 @@
 #include "refs.h"
 #include "quote.h"
 #include "builtin.h"
+#include "parse-options.h"
 
 #define DO_REVS                1
 #define DO_NOREV       2
@@ -209,13 +210,138 @@ static int try_difference(const char *arg)
        return 0;
 }
 
+static int parseopt_dump(const struct option *o, const char *arg, int unset)
+{
+       struct strbuf *parsed = o->value;
+       if (unset)
+               strbuf_addf(parsed, " --no-%s", o->long_name);
+       else if (o->short_name)
+               strbuf_addf(parsed, " -%c", o->short_name);
+       else
+               strbuf_addf(parsed, " --%s", o->long_name);
+       if (arg) {
+               strbuf_addch(parsed, ' ');
+               sq_quote_buf(parsed, arg);
+       }
+       return 0;
+}
+
+static const char *skipspaces(const char *s)
+{
+       while (isspace(*s))
+               s++;
+       return s;
+}
+
+static int cmd_parseopt(int argc, const char **argv, const char *prefix)
+{
+       static int keep_dashdash = 0;
+       static char const * const parseopt_usage[] = {
+               "git-rev-parse --parseopt [options] -- [<args>...]",
+               NULL
+       };
+       static struct option parseopt_opts[] = {
+               OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
+                                       "keep the `--` passed as an arg"),
+               OPT_END(),
+       };
+
+       struct strbuf sb, parsed;
+       const char **usage = NULL;
+       struct option *opts = NULL;
+       int onb = 0, osz = 0, unb = 0, usz = 0;
+
+       strbuf_init(&parsed, 0);
+       strbuf_addstr(&parsed, "set --");
+       argc = parse_options(argc, argv, parseopt_opts, parseopt_usage,
+                            PARSE_OPT_KEEP_DASHDASH);
+       if (argc < 1 || strcmp(argv[0], "--"))
+               usage_with_options(parseopt_usage, parseopt_opts);
+
+       strbuf_init(&sb, 0);
+       /* get the usage up to the first line with a -- on it */
+       for (;;) {
+               if (strbuf_getline(&sb, stdin, '\n') == EOF)
+                       die("premature end of input");
+               ALLOC_GROW(usage, unb + 1, usz);
+               if (!strcmp("--", sb.buf)) {
+                       if (unb < 1)
+                               die("no usage string given before the `--' separator");
+                       usage[unb] = NULL;
+                       break;
+               }
+               usage[unb++] = strbuf_detach(&sb, NULL);
+       }
+
+       /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
+       while (strbuf_getline(&sb, stdin, '\n') != EOF) {
+               const char *s;
+               struct option *o;
+
+               if (!sb.len)
+                       continue;
+
+               ALLOC_GROW(opts, onb + 1, osz);
+               memset(opts + onb, 0, sizeof(opts[onb]));
+
+               o = &opts[onb++];
+               s = strchr(sb.buf, ' ');
+               if (!s || *sb.buf == ' ') {
+                       o->type = OPTION_GROUP;
+                       o->help = xstrdup(skipspaces(s));
+                       continue;
+               }
+
+               o->type = OPTION_CALLBACK;
+               o->help = xstrdup(skipspaces(s));
+               o->value = &parsed;
+               o->callback = &parseopt_dump;
+               switch (s[-1]) {
+               case '=':
+                       s--;
+                       break;
+               case '?':
+                       o->flags = PARSE_OPT_OPTARG;
+                       s--;
+                       break;
+               default:
+                       o->flags = PARSE_OPT_NOARG;
+                       break;
+               }
+
+               if (s - sb.buf == 1) /* short option only */
+                       o->short_name = *sb.buf;
+               else if (sb.buf[1] != ',') /* long option only */
+                       o->long_name = xmemdupz(sb.buf, s - sb.buf);
+               else {
+                       o->short_name = *sb.buf;
+                       o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
+               }
+       }
+       strbuf_release(&sb);
+
+       /* put an OPT_END() */
+       ALLOC_GROW(opts, onb + 1, osz);
+       memset(opts + onb, 0, sizeof(opts[onb]));
+       argc = parse_options(argc, argv, opts, usage,
+                            keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0);
+
+       strbuf_addf(&parsed, " --");
+       sq_quote_argv(&parsed, argv, 0);
+       puts(parsed.buf);
+       return 0;
+}
+
 int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 {
        int i, as_is = 0, verify = 0;
        unsigned char sha1[20];
 
-       git_config(git_default_config);
+       if (argc > 1 && !strcmp("--parseopt", argv[1]))
+               return cmd_parseopt(argc - 1, argv + 1, prefix);
 
+       prefix = setup_git_directory();
+       git_config(git_default_config);
        for (i = 1; i < argc; i++) {
                const char *arg = argv[i];