[PATCH v3 2/2] ls-files: add %(skipworktree) atom to format option

From: ZheNing Hu via GitGitGadget <gitgitgadget@gmail.com>
Date: Feb 4, 2023, 16:16 UTC
Message-ID: <15e77743f7f19994ca2c3da626e57962275383a0.1675527416.git.gitgitgadget@gmail.com>
In-Reply-To: <pull.1458.v3.git.1675527416.gitgitgadget@gmail.com>

From: ZheNing Hu <adlternative@gmail.com>

Because sometimes we want to check if the files in the index match the sparse specification, so introduce "%(skipworktree)" atom to git ls-files `--format` option. When we use this option, if the file match the sparse specification, it will output "1", otherwise, output empty string "".

Signed-off-by: ZheNing Hu <adlternative@gmail.com>
---
 Documentation/git-ls-files.txt |  4 ++++
 builtin/ls-files.c             |  3 +++
 t/t3013-ls-files-format.sh     | 16 ++++++++++++++++
 3 files changed, 23 insertions(+)

diff --git a/Documentation/git-ls-files.txt b/Documentation/git-ls-files.txt
index 440043cdb8e..4902c311927 100644
--- a/Documentation/git-ls-files.txt
+++ b/Documentation/git-ls-files.txt
@@ -260,6 +260,10 @@ eolattr::
 	that applies to the path.
 path::
 	The pathname of the file which is recorded in the index.
+skipworktree::
+	Whether the file in the index has the SKIP_WORKTREE bit set.
+	See link:technical/sparse-checkout.txt[sparse-checkout]
+	for more information.
 
 EXCLUDE PATTERNS
 ----------------
diff --git a/builtin/ls-files.c b/builtin/ls-files.c
index a03b559ecaa..bbff868ae6b 100644
--- a/builtin/ls-files.c
+++ b/builtin/ls-files.c
@@ -280,6 +280,9 @@ static size_t expand_show_index(struct strbuf *sb, const char *start,
 			      data->pathname));
 	else if (skip_prefix(start, "(path)", &p))
 		write_name_to_buf(sb, data->pathname);
+	else if (skip_prefix(start, "(skipworktree)", &p))
+		strbuf_addstr(sb, ce_skip_worktree(data->ce) ?
+			      "1" : "");
 	else
 		die(_("bad ls-files format: %%%.*s"), (int)len, start);
 
diff --git a/t/t3013-ls-files-format.sh b/t/t3013-ls-files-format.sh
index efb7450bf1e..65939d38444 100755
--- a/t/t3013-ls-files-format.sh
+++ b/t/t3013-ls-files-format.sh
@@ -92,4 +92,20 @@ test_expect_success 'git ls-files --format with --debug' '
 	test_cmp expect actual
 '
 
+test_expect_success 'git ls-files --format with skipworktree' '
+	test_when_finished "git sparse-checkout disable" &&
+	mkdir dir1 dir2 &&
+	echo "file1" >dir1/file1.txt &&
+	echo "file2" >dir2/file2.txt &&
+	git add dir1 dir2 &&
+	git commit -m skipworktree &&
+	git sparse-checkout set dir1 &&
+	git ls-files --format="%(skipworktree) %(path)" "dir*" >actual &&
+	cat >expect <<-\EOF &&
+	 dir1/file1.txt
+	1 dir2/file2.txt
+	EOF
+	test_cmp expect actual
+'
+
 test_done

-- 
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