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authorDerrick Stolee <dstolee@microsoft.com>2019-11-21 22:04:33 (GMT)
committerJunio C Hamano <gitster@pobox.com>2019-11-22 07:11:43 (GMT)
commit94c0956b60969bbbb3ead19638d52591a59d713c (patch)
treef0c12fc430aa90b015adb130705feff3c926c0d8 /builtin/sparse-checkout.c
parentd9f6f3b6195a0ca35642561e530798ad1469bd41 (diff)
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sparse-checkout: create builtin with 'list' subcommand
The sparse-checkout feature is mostly hidden to users, as its only documentation is supplementary information in the docs for 'git read-tree'. In addition, users need to know how to edit the .git/info/sparse-checkout file with the right patterns, then run the appropriate 'git read-tree -mu HEAD' command. Keeping the working directory in sync with the sparse-checkout file requires care. Begin an effort to make the sparse-checkout feature a porcelain feature by creating a new 'git sparse-checkout' builtin. This builtin will be the preferred mechanism for manipulating the sparse-checkout file and syncing the working directory. The documentation provided is adapted from the "git read-tree" documentation with a few edits for clarity in the new context. Extra sections are added to hint toward a future change to a more restricted pattern set. Helped-by: Elijah Newren <newren@gmail.com> Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/sparse-checkout.c')
-rw-r--r--builtin/sparse-checkout.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c
new file mode 100644
index 0000000..5717c9b
--- /dev/null
+++ b/builtin/sparse-checkout.c
@@ -0,0 +1,86 @@
+#include "builtin.h"
+#include "config.h"
+#include "dir.h"
+#include "parse-options.h"
+#include "pathspec.h"
+#include "repository.h"
+#include "run-command.h"
+#include "strbuf.h"
+
+static char const * const builtin_sparse_checkout_usage[] = {
+ N_("git sparse-checkout list"),
+ NULL
+};
+
+static char *get_sparse_checkout_filename(void)
+{
+ return git_pathdup("info/sparse-checkout");
+}
+
+static void write_patterns_to_file(FILE *fp, struct pattern_list *pl)
+{
+ int i;
+
+ for (i = 0; i < pl->nr; i++) {
+ struct path_pattern *p = pl->patterns[i];
+
+ if (p->flags & PATTERN_FLAG_NEGATIVE)
+ fprintf(fp, "!");
+
+ fprintf(fp, "%s", p->pattern);
+
+ if (p->flags & PATTERN_FLAG_MUSTBEDIR)
+ fprintf(fp, "/");
+
+ fprintf(fp, "\n");
+ }
+}
+
+static int sparse_checkout_list(int argc, const char **argv)
+{
+ struct pattern_list pl;
+ char *sparse_filename;
+ int res;
+
+ memset(&pl, 0, sizeof(pl));
+
+ sparse_filename = get_sparse_checkout_filename();
+ res = add_patterns_from_file_to_list(sparse_filename, "", 0, &pl, NULL);
+ free(sparse_filename);
+
+ if (res < 0) {
+ warning(_("this worktree is not sparse (sparse-checkout file may not exist)"));
+ return 0;
+ }
+
+ write_patterns_to_file(stdout, &pl);
+ clear_pattern_list(&pl);
+
+ return 0;
+}
+
+int cmd_sparse_checkout(int argc, const char **argv, const char *prefix)
+{
+ static struct option builtin_sparse_checkout_options[] = {
+ OPT_END(),
+ };
+
+ if (argc == 2 && !strcmp(argv[1], "-h"))
+ usage_with_options(builtin_sparse_checkout_usage,
+ builtin_sparse_checkout_options);
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_sparse_checkout_options,
+ builtin_sparse_checkout_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
+
+ git_config(git_default_config, NULL);
+
+ if (argc > 0) {
+ if (!strcmp(argv[0], "list"))
+ return sparse_checkout_list(argc, argv);
+ }
+
+ usage_with_options(builtin_sparse_checkout_usage,
+ builtin_sparse_checkout_options);
+}