[PATCH 08/10] checkout: add --full to fully populate working directory

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 Documentation/git-checkout.txt       |    6 +++++-
 builtin/checkout.c                   |   23 ++++++++++++++++++++---
 t/t1011-read-tree-sparse-checkout.sh |    7 +++++++
 3 files changed, 32 insertions(+), 4 deletions(-)

diff --git a/Documentation/git-checkout.txt b/Documentation/git-checkout.txt
index 478bfe7..1d82063 100644
--- a/Documentation/git-checkout.txt
+++ b/Documentation/git-checkout.txt
@@ -12,7 +12,7 @@ SYNOPSIS
 'git checkout' [-q] [-f] [-m] [[-b|-B|--orphan] <new_branch>] [<start_point>]
 'git checkout' [-f|--ours|--theirs|-m|--conflict=<style>] [<tree-ish>] [--] <paths>...
 'git checkout' --patch [<tree-ish>] [--] [<paths>...]
-'git checkout' -S
+'git checkout' [-S|--full]
 
 DESCRIPTION
 -----------
@@ -184,6 +184,10 @@ edits from your current working tree.
 	$GIT_DIR/info/sparse-checkout. The working directory is also
 	updated. An empty file will abort the process.
 
+--full:
+	Reset $GIT_DIR/info/sparse-checkout to include everything and
+	update working directory accordingly.
+
 <branch>::
 	Branch to checkout; if it refers to a branch (i.e., a name that,
 	when prepended with "refs/heads/", is a valid ref), then that
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 47847b3..f070930 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -710,7 +710,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
 	char *conflict_style = NULL;
 	int patch_mode = 0;
 	int dwim_new_local_branch = 1;
-	int update_sparse_checkout = 0;
+	int update_sparse_checkout = 0, full_checkout = 0;
 	struct option options[] = {
 		OPT__QUIET(&opts.quiet),
 		OPT_STRING('b', NULL, &opts.new_branch, "branch",
@@ -732,6 +732,8 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
 		OPT_BOOLEAN('p', "patch", &patch_mode, "select hunks interactively"),
 		OPT_BOOLEAN('S', "update-sparse-checkout", &update_sparse_checkout,
 			    "open up editor to edit $GIT_DIR/info/sparse-checkout" ),
+		OPT_BOOLEAN(0, "full", &full_checkout,
+			    "reset $GIT_DIR/info/sparse-checkout to checkout everything" ),
 		{ OPTION_BOOLEAN, 0, "guess", &dwim_new_local_branch, NULL,
 		  "second guess 'git checkout no-such-branch'",
 		  PARSE_OPT_NOARG | PARSE_OPT_HIDDEN },
@@ -750,6 +752,9 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
 	argc = parse_options(argc, argv, prefix, options, checkout_usage,
 			     PARSE_OPT_KEEP_DASHDASH);
 
+	if (full_checkout)
+		update_sparse_checkout = 1;
+
 	if (update_sparse_checkout && !core_apply_sparse_checkout)
 		die("core.sparseCheckout needs to be turned on");
 
@@ -952,8 +957,20 @@ no_reference:
 	if (opts.writeout_stage)
 		die("--ours/--theirs is incompatible with switching branches.");
 
-	if (update_sparse_checkout)
-		edit_info_sparse_checkout();
+	if (update_sparse_checkout) {
+		if (full_checkout) {
+			FILE *fp = fopen(git_path("info/sparse-checkout"), "w+");
+			if (!fp)
+				die_errno("Unable to reset %s", git_path("info/sparse-checkout"));
+			fprintf(fp, "# Specify what files are checked out in working directory\n");
+			fprintf(fp, "# Run \"git checkout\" after updating this file to update working directory\n");
+			fprintf(fp, "# If this is opened by \"git checkout -S\", empty this file will abort it.\n");
+			fprintf(fp, "*\n");
+			fclose(fp);
+		}
+		else
+			edit_info_sparse_checkout(full_checkout);
+	}
 
 	return switch_branches(&opts, &new);
 }
diff --git a/t/t1011-read-tree-sparse-checkout.sh b/t/t1011-read-tree-sparse-checkout.sh
index fe4716c..055e858 100755
--- a/t/t1011-read-tree-sparse-checkout.sh
+++ b/t/t1011-read-tree-sparse-checkout.sh
@@ -202,4 +202,11 @@ EOF
 	test ! -f init.t
 '
 
+test_expect_success 'git checkout --full' '
+	git checkout --full &&
+	grep "^\*$" .git/info/sparse-checkout &&
+	test -f sub/added &&
+	test -f init.t
+'
+
 test_done
-- 
1.7.3.2.210.g045198