[PATCH v3 2/4] update-index: use the same structure for chmod as add

[Thomas Gummerer <t.gummerer@xxxxxxxxx>]

While the chmod options for update-index and the add have the same
functionality, they are using different ways to parse and handle the
option internally.  Unify these modes in order to make further
refactoring simpler.

Signed-off-by: Thomas Gummerer <t.gummerer@xxxxxxxxx>
---
 builtin/update-index.c        | 39 +++++++++++++++++++--------------------
 t/t2107-update-index-basic.sh | 13 +++++++++++++
 2 files changed, 32 insertions(+), 20 deletions(-)

diff --git a/builtin/update-index.c b/builtin/update-index.c
index ba04b19..6d6cddd 100644
--- a/builtin/update-index.c
+++ b/builtin/update-index.c
@@ -419,11 +419,12 @@ static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
 	return 0;
 }
 
-static void chmod_path(int flip, const char *path)
+static void chmod_path(int force_mode, const char *path)
 {
 	int pos;
 	struct cache_entry *ce;
 	unsigned int mode;
+	char flip = force_mode == 0777 ? '+' : '-';
 
 	pos = cache_name_pos(path, strlen(path));
 	if (pos < 0)
@@ -432,17 +433,11 @@ static void chmod_path(int flip, const char *path)
 	mode = ce->ce_mode;
 	if (!S_ISREG(mode))
 		goto fail;
-	switch (flip) {
-	case '+':
-		ce->ce_mode |= 0111; break;
-	case '-':
-		ce->ce_mode &= ~0111; break;
-	default:
-		goto fail;
-	}
+	ce->ce_mode = create_ce_mode(force_mode);
 	cache_tree_invalidate_path(&the_index, path);
 	ce->ce_flags |= CE_UPDATE_IN_BASE;
 	active_cache_changed |= CE_ENTRY_CHANGED;
+
 	report("chmod %cx '%s'", flip, path);
 	return;
  fail:
@@ -789,12 +784,16 @@ static int really_refresh_callback(const struct option *opt,
 }
 
 static int chmod_callback(const struct option *opt,
-				const char *arg, int unset)
+			  const char *arg, int unset)
 {
-	char *flip = opt->value;
-	if ((arg[0] != '-' && arg[0] != '+') || arg[1] != 'x' || arg[2])
-		return error("option 'chmod' expects \"+x\" or \"-x\"");
-	*flip = arg[0];
+	int *force_mode = opt->value;
+	if (!strcmp(arg, "-x"))
+		*force_mode = 0666;
+	else if (!strcmp(arg, "+x"))
+		*force_mode = 0777;
+	else
+		die(_("option 'chmod' expects \"+x\" or \"-x\""));
+
 	return 0;
 }
 
@@ -917,7 +916,7 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 	int read_from_stdin = 0;
 	int prefix_length = prefix ? strlen(prefix) : 0;
 	int preferred_index_format = 0;
-	char set_executable_bit = 0;
+	int force_mode = 0;
 	struct refresh_params refresh_args = {0, &has_errors};
 	int lock_error = 0;
 	int split_index = -1;
@@ -955,7 +954,7 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 			PARSE_OPT_NOARG | /* disallow --cacheinfo=<mode> form */
 			PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP,
 			(parse_opt_cb *) cacheinfo_callback},
-		{OPTION_CALLBACK, 0, "chmod", &set_executable_bit, N_("(+/-)x"),
+		{OPTION_CALLBACK, 0, "chmod", &force_mode, N_("(+/-)x"),
 			N_("override the executable bit of the listed files"),
 			PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP,
 			chmod_callback},
@@ -1055,8 +1054,8 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 			setup_work_tree();
 			p = prefix_path(prefix, prefix_length, path);
 			update_one(p);
-			if (set_executable_bit)
-				chmod_path(set_executable_bit, p);
+			if (force_mode)
+				chmod_path(force_mode, p);
 			free(p);
 			ctx.argc--;
 			ctx.argv++;
@@ -1100,8 +1099,8 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 			}
 			p = prefix_path(prefix, prefix_length, buf.buf);
 			update_one(p);
-			if (set_executable_bit)
-				chmod_path(set_executable_bit, p);
+			if (force_mode)
+				chmod_path(force_mode, p);
 			free(p);
 		}
 		strbuf_release(&unquoted);
diff --git a/t/t2107-update-index-basic.sh b/t/t2107-update-index-basic.sh
index dfe02f4..32ac6e0 100755
--- a/t/t2107-update-index-basic.sh
+++ b/t/t2107-update-index-basic.sh
@@ -80,4 +80,17 @@ test_expect_success '.lock files cleaned up' '
 	)
 '
 
+test_expect_success '--chmod=+x and chmod=-x in the same argument list' '
+	>A &&
+	>B &&
+	git add A B &&
+	git update-index --chmod=+x A --chmod=-x B &&
+	cat >expect <<-\EOF &&
+	100755 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0	A
+	100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0	B
+	EOF
+	git ls-files --stage A B >actual &&
+	test_cmp expect actual
+'
+
 test_done
-- 
2.10.0.304.gf2ff484