[PATCH] parse-opt: bring PARSE_OPT_HIDDEN to git-rev-parse --parseopt

[Pierre Habouzit <madcoder@debian.org>]

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Signed-off-by: Pierre Habouzit <madcoder@debian.org>
---
    On ven, fév 22, 2008 at 06:19:28 +0000, Pierre Habouzit wrote:
    > On Fri, Feb 22, 2008 at 05:17:51PM +0000, Junio C Hamano wrote:
    > > I did not find accessible from the command line variant was the
    > > parse-opt-hidden feature, which was frustrating.
    > 
    >   Well, it's probably doable using some more magic flags, I can hack
    > something if you need to, I'll try to work something out during FOSDEM's
    > talks :)

      Here it is …
      I also made the parsing more extensible wrt new flags if needed.

      We should definitely write tests too.

 Documentation/git-rev-parse.txt |   15 ++++++++++-----
 builtin-rev-parse.c             |   25 ++++++++++++++-----------
 2 files changed, 24 insertions(+), 16 deletions(-)

diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index f02f6bb..e961c20 100644
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -325,7 +325,7 @@ The lines after the separator describe the options.
 Each line of options has this format:
 
 ------------
-<opt_spec><arg_spec>? SP+ help LF
+<opt_spec><flags>? SP+ help LF
 ------------
 
 `<opt_spec>`::
@@ -334,10 +334,15 @@ Each line of options has this format:
 	is necessary. `h,help`, `dry-run` and `f` are all three correct
 	`<opt_spec>`.
 
-`<arg_spec>`::
-	an `<arg_spec>` tells the option parser if the option has an argument
-	(`=`), an optional one (`?` though its use is discouraged) or none
-	(no `<arg_spec>` in that case).
+`<flags>`::
+	`<flags>` are any suite of `*`, `=` or `?`.
+	* Use `=` if the option take an argument.
+
+	* Use `?` to mean that the option is optional (though its use is discouraged).
+
+	* Use `*` to mean that this option should not be listed in the usage
+	  generated for the `-h` argument. It's shown for `--help-all` as
+	  documented in linkgit:gitcli[5].
 
 The remainder of the line, after stripping the spaces, is used
 as the help associated to the option.
diff --git a/builtin-rev-parse.c b/builtin-rev-parse.c
index b9af1a5..5ffc4e0 100644
--- a/builtin-rev-parse.c
+++ b/builtin-rev-parse.c
@@ -322,18 +322,21 @@ static int cmd_parseopt(int argc, const char **argv, const char *prefix)
 		o->type = OPTION_CALLBACK;
 		o->help = xstrdup(skipspaces(s));
 		o->value = &parsed;
+		o->flags = PARSE_OPT_NOARG;
 		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;
+		while (s > sb.buf && strchr("*=?", s[-1])) {
+			switch (*--s) {
+			case '=':
+				o->flags &= ~PARSE_OPT_NOARG;
+				break;
+			case '?':
+				o->flags &= ~PARSE_OPT_NOARG;
+				o->flags |= PARSE_OPT_OPTARG;
+				break;
+			case '*':
+				o->flags &= PARSE_OPT_HIDDEN;
+				break;
+			}
 		}
 
 		if (s - sb.buf == 1) /* short option only */
-- 
1.5.4.2.281.g28d0e


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