From: Derrick Stolee <dsto...@microsoft.com>
Getting started with a sparse-checkout file can be daunting. Help
users start their sparse enlistment using 'git sparse-checkout init'.
This will set 'core.sparseCheckout=true' in their config, write
an initial set of patterns to the sparse-checkout file, and update
their working directory.
Make sure to use the `extensions.worktreeConfig` setting and write
the sparse checkout config to the worktree-specific config file.
This avoids confusing interactions with other worktrees.
The use of running another process for 'git read-tree' is sub-
optimal. This will be removed in a later change.
Signed-off-by: Derrick Stolee <dsto...@microsoft.com>
---
Documentation/git-sparse-checkout.txt | 11 ++++
builtin/sparse-checkout.c | 79 ++++++++++++++++++++++++++-
t/t1091-sparse-checkout-builtin.sh | 41 ++++++++++++++
3 files changed, 130 insertions(+), 1 deletion(-)
diff --git a/Documentation/git-sparse-checkout.txt
b/Documentation/git-sparse-checkout.txt
index 9d6ca22917..930a361567 100644
--- a/Documentation/git-sparse-checkout.txt
+++ b/Documentation/git-sparse-checkout.txt
@@ -30,6 +30,17 @@ COMMANDS
'list'::
Provide a list of the contents in the sparse-checkout file.
+'init'::
+ Enable the `core.sparseCheckout` setting. If the
+ sparse-checkout file does not exist, then populate it with
+ patterns that match every file in the root directory and
+ no other directories, then will remove all directories tracked
+ by Git. Add patterns to the sparse-checkout file to
+ repopulate the working directory.
++
+To avoid interfering with other worktrees, it first enables the
+`extensions.worktreeConfig` setting and makes sure to set the
+`core.sparseCheckout` setting in the worktree-specific config file.
SPARSE CHECKOUT
---------------
diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c
index 5717c9b2cb..77aa52ca01 100644
--- a/builtin/sparse-checkout.c
+++ b/builtin/sparse-checkout.c
@@ -8,7 +8,7 @@
#include "strbuf.h"
static char const * const builtin_sparse_checkout_usage[] = {
- N_("git sparse-checkout list"),
+ N_("git sparse-checkout (init|list)"),
NULL
};
@@ -59,6 +59,81 @@ static int sparse_checkout_list(int argc, const char **argv)
return 0;
}
+static int update_working_directory(void)
+{
+ struct argv_array argv = ARGV_ARRAY_INIT;
+ int result = 0;
+ argv_array_pushl(&argv, "read-tree", "-m", "-u", "HEAD", NULL);
+
+ if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
+ error(_("failed to update index with new sparse-checkout
paths"));
+ result = 1;
+ }
+
+ argv_array_clear(&argv);
+ return result;
+}
+
+enum sparse_checkout_mode {
+ MODE_NO_PATTERNS = 0,
+ MODE_ALL_PATTERNS = 1,
+};
+
+static int sc_set_config(enum sparse_checkout_mode mode)
+{
+ struct argv_array argv = ARGV_ARRAY_INIT;
+
+ if (git_config_set_gently("extensions.worktreeConfig", "true")) {
+ error(_("failed to set extensions.worktreeConfig setting"));
+ return 1;
+ }
+
+ argv_array_pushl(&argv, "config", "--worktree", "core.sparseCheckout",
NULL);
+
+ if (mode)
+ argv_array_pushl(&argv, "true", NULL);
+ else
+ argv_array_pushl(&argv, "false", NULL);
+
+ if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
+ error(_("failed to enable core.sparseCheckout"));
+ return 1;
+ }
+
+ return 0;
+}
+
+static int sparse_checkout_init(int argc, const char **argv)
+{
+ struct pattern_list pl;
+ char *sparse_filename;
+ FILE *fp;
+ int res;
+
+ if (sc_set_config(MODE_ALL_PATTERNS))
+ return 1;
+
+ memset(&pl, 0, sizeof(pl));
+
+ sparse_filename = get_sparse_checkout_filename();
+ res = add_patterns_from_file_to_list(sparse_filename, "", 0, &pl, NULL);
+
+ /* If we already have a sparse-checkout file, use it. */
+ if (res >= 0) {
+ free(sparse_filename);
+ goto reset_dir;
+ }
+
+ /* initial mode: all blobs at root */
+ fp = xfopen(sparse_filename, "w");
+ free(sparse_filename);
+ fprintf(fp, "/*\n!/*/\n");
+ fclose(fp);
+
+reset_dir:
+ return update_working_directory();
+}
+
int cmd_sparse_checkout(int argc, const char **argv, const char *prefix)
{
static struct option builtin_sparse_checkout_options[] = {
@@ -79,6 +154,8 @@ int cmd_sparse_checkout(int argc, const char **argv, const
char *prefix)
if (argc > 0) {
if (!strcmp(argv[0], "list"))
return sparse_checkout_list(argc, argv);
+ if (!strcmp(argv[0], "init"))
+ return sparse_checkout_init(argc, argv);
}
usage_with_options(builtin_sparse_checkout_usage,
diff --git a/t/t1091-sparse-checkout-builtin.sh
b/t/t1091-sparse-checkout-builtin.sh
index 9b73d44907..cd56cc384b 100755
--- a/t/t1091-sparse-checkout-builtin.sh
+++ b/t/t1091-sparse-checkout-builtin.sh
@@ -42,4 +42,45 @@ test_expect_success 'git sparse-checkout list (populated)' '
test_cmp expect list
'
+test_expect_success 'git sparse-checkout init' '
+ git -C repo sparse-checkout init &&
+ cat >expect <<-EOF &&
+ /*
+ !/*/
+ EOF
+ test_cmp expect repo/.git/info/sparse-checkout &&
+ git -C repo config --list >config &&
+ test_i18ngrep "core.sparsecheckout=true" config &&
+ ls repo >dir &&
+ echo a >expect &&
+ test_cmp expect dir
+'
+
+test_expect_success 'git sparse-checkout list after init' '
+ git -C repo sparse-checkout list >actual &&
+ cat >expect <<-EOF &&
+ /*
+ !/*/
+ EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'init with existing sparse-checkout' '
+ echo "*folder*" >> repo/.git/info/sparse-checkout &&
+ git -C repo sparse-checkout init &&
+ cat >expect <<-EOF &&
+ /*
+ !/*/
+ *folder*
+ EOF
+ test_cmp expect repo/.git/info/sparse-checkout &&
+ ls repo >dir &&
+ cat >expect <<-EOF &&
+ a
+ folder1
+ folder2
+ EOF
+ test_cmp expect dir
+'
+
test_done
--
gitgitgadget
