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From: "Alexandr Miloslavskiy via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>,
	Junio C Hamano <gitster@pobox.com>,
	Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Subject: [PATCH 1/5] parse_branchname_arg(): fix dash_dash_pos, drop argcount
Date: Thu, 28 Nov 2019 19:32:14 +0000
Message-ID: <771947d01f759a72b9f8999e929bf1f7765327aa.1574969538.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.479.git.1574969538.gitgitgadget@gmail.com>

From: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>

`dash_dash_pos` was only calculated under `opts->accept_pathspec`. This
is unexpected to readers and made it harder to reason about the code.
Fix this by restoring the expected meaning.

Simplify the code by dropping `argcount` and useless `argc` / `argv`
manipulations.

This should not change behavior in any way.

Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
---
 builtin/checkout.c | 34 ++++++++++++++--------------------
 1 file changed, 14 insertions(+), 20 deletions(-)

diff --git a/builtin/checkout.c b/builtin/checkout.c
index 3634a3dac1..655b389756 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -1121,7 +1121,6 @@ static int parse_branchname_arg(int argc, const char **argv,
 				int *dwim_remotes_matched)
 {
 	const char **new_branch = &opts->new_branch;
-	int argcount = 0;
 	const char *arg;
 	int dash_dash_pos;
 	int has_dash_dash = 0;
@@ -1180,17 +1179,21 @@ static int parse_branchname_arg(int argc, const char **argv,
 	arg = argv[0];
 	dash_dash_pos = -1;
 	for (i = 0; i < argc; i++) {
-		if (opts->accept_pathspec && !strcmp(argv[i], "--")) {
+		if (!strcmp(argv[i], "--")) {
 			dash_dash_pos = i;
 			break;
 		}
 	}
-	if (dash_dash_pos == 0)
-		return 1; /* case (2) */
-	else if (dash_dash_pos == 1)
-		has_dash_dash = 1; /* case (3) or (1) */
-	else if (dash_dash_pos >= 2)
-		die(_("only one reference expected, %d given."), dash_dash_pos);
+
+	if (opts->accept_pathspec) {
+	    if (dash_dash_pos == 0)
+		    return 1; /* case (2) */
+	    else if (dash_dash_pos == 1)
+		    has_dash_dash = 1; /* case (3) or (1) */
+	    else if (dash_dash_pos >= 2)
+		    die(_("only one reference expected, %d given."), dash_dash_pos);
+	}
+
 	opts->count_checkout_paths = !opts->quiet && !has_dash_dash;
 
 	if (!strcmp(arg, "-"))
@@ -1241,15 +1244,10 @@ static int parse_branchname_arg(int argc, const char **argv,
 		if (!recover_with_dwim) {
 			if (has_dash_dash)
 				die(_("invalid reference: %s"), arg);
-			return argcount;
+			return 0;
 		}
 	}
 
-	/* we can't end up being in (2) anymore, eat the argument */
-	argcount++;
-	argv++;
-	argc--;
-
 	setup_new_branch_info_and_source_tree(new_branch_info, opts, rev, arg);
 
 	if (!opts->source_tree)                   /* case (1): want a tree */
@@ -1262,15 +1260,11 @@ static int parse_branchname_arg(int argc, const char **argv,
 		 * even if there happen to be a file called 'branch';
 		 * it would be extremely annoying.
 		 */
-		if (argc)
+		if (argc > 1)
 			verify_non_filename(opts->prefix, arg);
-	} else if (opts->accept_pathspec) {
-		argcount++;
-		argv++;
-		argc--;
 	}
 
-	return argcount;
+	return (dash_dash_pos == 1) ? 2 : 1;
 }
 
 static int switch_unborn_to_new_branch(const struct checkout_opts *opts)
-- 
gitgitgadget


  reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-28 19:32 [PATCH 0/5] parse_branchname_arg(): make code easier to understand Alexandr Miloslavskiy via GitGitGadget
2019-11-28 19:32 ` Alexandr Miloslavskiy via GitGitGadget [this message]
2019-12-18 18:52   ` [PATCH 1/5] parse_branchname_arg(): fix dash_dash_pos, drop argcount Junio C Hamano
2019-12-19 18:03     ` Alexandr Miloslavskiy
2019-11-28 19:32 ` [PATCH 2/5] parse_branchname_arg(): introduce expect_commit_only Alexandr Miloslavskiy via GitGitGadget
2019-12-18 19:18   ` Junio C Hamano
2019-12-19 18:03     ` Alexandr Miloslavskiy
2019-11-28 19:32 ` [PATCH 3/5] parse_branchname_arg(): update code comments Alexandr Miloslavskiy via GitGitGadget
2019-11-28 19:32 ` [PATCH 4/5] parse_branchname_arg(): refactor the decision making Alexandr Miloslavskiy via GitGitGadget
2019-11-28 19:32 ` [PATCH 5/5] t2024: cover more cases Alexandr Miloslavskiy via GitGitGadget

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