revisions: refactor handle_revision_opt into parse_revision_opt.

It seems we're using handle_revision_opt the same way each time, have a
wrapper around it that does the 9-liner we copy each time instead.

handle_revision_opt can be static in the module for now, it's always
possible to make it public again if needed.

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-blame.c

@@ -2305,8 +2305,6 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	parse_options_start(&ctx, argc, argv, PARSE_OPT_KEEP_DASHDASH |
 			    PARSE_OPT_KEEP_ARGV0);
 	for (;;) {
-		int n;
-
 		switch (parse_options_step(&ctx, options, blame_opt_usage)) {
 		case PARSE_OPT_HELP:
 			exit(129);
@@ -2320,14 +2318,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 			ctx.argv[0] = "--children";
 			reverse = 1;
 		}
-		n = handle_revision_opt(&revs, ctx.argc, ctx.argv,
-					&ctx.cpidx, ctx.out);
-		if (n <= 0) {
-			error("unknown option `%s'", ctx.argv[0]);
-			usage_with_options(blame_opt_usage, options);
-		}
-		ctx.argv += n;
-		ctx.argc -= n;
+		parse_revision_opt(&revs, &ctx, options, blame_opt_usage);
 	}
 parse_done:
 	argc = parse_options_end(&ctx);

builtin-shortlog.c

@@ -255,21 +255,13 @@ int cmd_shortlog(int argc, const char **argv, const char *prefix)
 			    PARSE_OPT_KEEP_ARGV0);
 
 	for (;;) {
-		int n;
 		switch (parse_options_step(&ctx, options, shortlog_usage)) {
 		case PARSE_OPT_HELP:
 			exit(129);
 		case PARSE_OPT_DONE:
 			goto parse_done;
 		}
-		n = handle_revision_opt(&rev, ctx.argc, ctx.argv,
-					&ctx.cpidx, ctx.out);
-		if (n <= 0) {
-			error("unknown option `%s'", ctx.argv[0]);
-			usage_with_options(shortlog_usage, options);
-		}
-		ctx.argv += n;
-		ctx.argc -= n;
+		parse_revision_opt(&rev, &ctx, options, shortlog_usage);
 	}
 parse_done:
 	argc = parse_options_end(&ctx);

revision.c

@@ -957,7 +957,7 @@ static void add_ignore_packed(struct rev_info *revs, const char *name)
 	revs->ignore_packed[num] = NULL;
 }
 
-int handle_revision_opt(struct rev_info *revs, int argc, const char **argv,
+static int handle_revision_opt(struct rev_info *revs, int argc, const char **argv,
 			       int *unkc, const char **unkv)
 {
 	const char *arg = argv[0];
@@ -1163,6 +1163,20 @@ int handle_revision_opt(struct rev_info *revs, int argc, const char **argv,
 	return 1;
 }
 
+void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
+			const struct option *options,
+			const char * const usagestr[])
+{
+	int n = handle_revision_opt(revs, ctx->argc, ctx->argv,
+				    &ctx->cpidx, ctx->out);
+	if (n <= 0) {
+		error("unknown option `%s'", ctx->argv[0]);
+		usage_with_options(usagestr, options);
+	}
+	ctx->argv += n;
+	ctx->argc -= n;
+}
+
 /*
  * Parse revision information, filling in the "rev_info" structure,
  * and removing the used arguments from the argument list.

revision.h

@@ -1,6 +1,8 @@
 #ifndef REVISION_H
 #define REVISION_H
 
+#include "parse-options.h"
+
 #define SEEN		(1u<<0)
 #define UNINTERESTING   (1u<<1)
 #define TREESAME	(1u<<2)
@@ -119,8 +121,9 @@ volatile show_early_output_fn_t show_early_output;
 
 extern void init_revisions(struct rev_info *revs, const char *prefix);
 extern int setup_revisions(int argc, const char **argv, struct rev_info *revs, const char *def);
-extern int handle_revision_opt(struct rev_info *revs, int argc, const char **argv,
-			       int *unkc, const char **unkv);
+extern void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
+				 const struct option *options,
+				 const char * const usagestr[]);
 extern int handle_revision_arg(const char *arg, struct rev_info *revs,int flags,int cant_be_filename);
 
 extern int prepare_revision_walk(struct rev_info *revs);