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-rw-r--r--builtin/sparse-checkout.c948
1 files changed, 948 insertions, 0 deletions
diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c
new file mode 100644
index 0000000..58a2250
--- /dev/null
+++ b/builtin/sparse-checkout.c
@@ -0,0 +1,948 @@
+#include "builtin.h"
+#include "cache.h"
+#include "config.h"
+#include "dir.h"
+#include "parse-options.h"
+#include "pathspec.h"
+#include "repository.h"
+#include "run-command.h"
+#include "strbuf.h"
+#include "string-list.h"
+#include "cache-tree.h"
+#include "lockfile.h"
+#include "resolve-undo.h"
+#include "unpack-trees.h"
+#include "wt-status.h"
+#include "quote.h"
+#include "sparse-index.h"
+#include "worktree.h"
+
+static const char *empty_base = "";
+
+static char const * const builtin_sparse_checkout_usage[] = {
+ N_("git sparse-checkout (init | list | set | add | reapply | disable) [<options>]"),
+ NULL
+};
+
+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 char const * const builtin_sparse_checkout_list_usage[] = {
+ "git sparse-checkout list",
+ NULL
+};
+
+static int sparse_checkout_list(int argc, const char **argv, const char *prefix)
+{
+ static struct option builtin_sparse_checkout_list_options[] = {
+ OPT_END(),
+ };
+ struct pattern_list pl;
+ char *sparse_filename;
+ int res;
+
+ if (!core_apply_sparse_checkout)
+ die(_("this worktree is not sparse"));
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_sparse_checkout_list_options,
+ builtin_sparse_checkout_list_usage, 0);
+
+ memset(&pl, 0, sizeof(pl));
+
+ pl.use_cone_patterns = core_sparse_checkout_cone;
+
+ sparse_filename = get_sparse_checkout_filename();
+ res = add_patterns_from_file_to_list(sparse_filename, "", 0, &pl, NULL, 0);
+ free(sparse_filename);
+
+ if (res < 0) {
+ warning(_("this worktree is not sparse (sparse-checkout file may not exist)"));
+ return 0;
+ }
+
+ if (pl.use_cone_patterns) {
+ int i;
+ struct pattern_entry *pe;
+ struct hashmap_iter iter;
+ struct string_list sl = STRING_LIST_INIT_DUP;
+
+ hashmap_for_each_entry(&pl.recursive_hashmap, &iter, pe, ent) {
+ /* pe->pattern starts with "/", skip it */
+ string_list_insert(&sl, pe->pattern + 1);
+ }
+
+ string_list_sort(&sl);
+
+ for (i = 0; i < sl.nr; i++) {
+ quote_c_style(sl.items[i].string, NULL, stdout, 0);
+ printf("\n");
+ }
+
+ return 0;
+ }
+
+ write_patterns_to_file(stdout, &pl);
+ clear_pattern_list(&pl);
+
+ return 0;
+}
+
+static void clean_tracked_sparse_directories(struct repository *r)
+{
+ int i, was_full = 0;
+ struct strbuf path = STRBUF_INIT;
+ size_t pathlen;
+ struct string_list_item *item;
+ struct string_list sparse_dirs = STRING_LIST_INIT_DUP;
+
+ /*
+ * If we are not using cone mode patterns, then we cannot
+ * delete directories outside of the sparse cone.
+ */
+ if (!r || !r->index || !r->worktree)
+ return;
+ if (init_sparse_checkout_patterns(r->index) ||
+ !r->index->sparse_checkout_patterns->use_cone_patterns)
+ return;
+
+ /*
+ * Use the sparse index as a data structure to assist finding
+ * directories that are safe to delete. This conversion to a
+ * sparse index will not delete directories that contain
+ * conflicted entries or submodules.
+ */
+ if (r->index->sparse_index == INDEX_EXPANDED) {
+ /*
+ * If something, such as a merge conflict or other concern,
+ * prevents us from converting to a sparse index, then do
+ * not try deleting files.
+ */
+ if (convert_to_sparse(r->index, SPARSE_INDEX_MEMORY_ONLY))
+ return;
+ was_full = 1;
+ }
+
+ strbuf_addstr(&path, r->worktree);
+ strbuf_complete(&path, '/');
+ pathlen = path.len;
+
+ /*
+ * Collect directories that have gone out of scope but also
+ * exist on disk, so there is some work to be done. We need to
+ * store the entries in a list before exploring, since that might
+ * expand the sparse-index again.
+ */
+ for (i = 0; i < r->index->cache_nr; i++) {
+ struct cache_entry *ce = r->index->cache[i];
+
+ if (S_ISSPARSEDIR(ce->ce_mode) &&
+ repo_file_exists(r, ce->name))
+ string_list_append(&sparse_dirs, ce->name);
+ }
+
+ for_each_string_list_item(item, &sparse_dirs) {
+ struct dir_struct dir = DIR_INIT;
+ struct pathspec p = { 0 };
+ struct strvec s = STRVEC_INIT;
+
+ strbuf_setlen(&path, pathlen);
+ strbuf_addstr(&path, item->string);
+
+ dir.flags |= DIR_SHOW_IGNORED_TOO;
+
+ setup_standard_excludes(&dir);
+ strvec_push(&s, path.buf);
+
+ parse_pathspec(&p, PATHSPEC_GLOB, 0, NULL, s.v);
+ fill_directory(&dir, r->index, &p);
+
+ if (dir.nr) {
+ warning(_("directory '%s' contains untracked files,"
+ " but is not in the sparse-checkout cone"),
+ item->string);
+ } else if (remove_dir_recursively(&path, 0)) {
+ /*
+ * Removal is "best effort". If something blocks
+ * the deletion, then continue with a warning.
+ */
+ warning(_("failed to remove directory '%s'"),
+ item->string);
+ }
+
+ strvec_clear(&s);
+ clear_pathspec(&p);
+ dir_clear(&dir);
+ }
+
+ string_list_clear(&sparse_dirs, 0);
+ strbuf_release(&path);
+
+ if (was_full)
+ ensure_full_index(r->index);
+}
+
+static int update_working_directory(struct pattern_list *pl)
+{
+ enum update_sparsity_result result;
+ struct unpack_trees_options o;
+ struct lock_file lock_file = LOCK_INIT;
+ struct repository *r = the_repository;
+
+ /* If no branch has been checked out, there are no updates to make. */
+ if (is_index_unborn(r->index))
+ return UPDATE_SPARSITY_SUCCESS;
+
+ r->index->sparse_checkout_patterns = pl;
+
+ memset(&o, 0, sizeof(o));
+ o.verbose_update = isatty(2);
+ o.update = 1;
+ o.head_idx = -1;
+ o.src_index = r->index;
+ o.dst_index = r->index;
+ o.skip_sparse_checkout = 0;
+ o.pl = pl;
+
+ setup_work_tree();
+
+ repo_hold_locked_index(r, &lock_file, LOCK_DIE_ON_ERROR);
+
+ setup_unpack_trees_porcelain(&o, "sparse-checkout");
+ result = update_sparsity(&o);
+ clear_unpack_trees_porcelain(&o);
+
+ if (result == UPDATE_SPARSITY_WARNINGS)
+ /*
+ * We don't do any special handling of warnings from untracked
+ * files in the way or dirty entries that can't be removed.
+ */
+ result = UPDATE_SPARSITY_SUCCESS;
+ if (result == UPDATE_SPARSITY_SUCCESS)
+ write_locked_index(r->index, &lock_file, COMMIT_LOCK);
+ else
+ rollback_lock_file(&lock_file);
+
+ clean_tracked_sparse_directories(r);
+
+ r->index->sparse_checkout_patterns = NULL;
+ return result;
+}
+
+static char *escaped_pattern(char *pattern)
+{
+ char *p = pattern;
+ struct strbuf final = STRBUF_INIT;
+
+ while (*p) {
+ if (is_glob_special(*p))
+ strbuf_addch(&final, '\\');
+
+ strbuf_addch(&final, *p);
+ p++;
+ }
+
+ return strbuf_detach(&final, NULL);
+}
+
+static void write_cone_to_file(FILE *fp, struct pattern_list *pl)
+{
+ int i;
+ struct pattern_entry *pe;
+ struct hashmap_iter iter;
+ struct string_list sl = STRING_LIST_INIT_DUP;
+ struct strbuf parent_pattern = STRBUF_INIT;
+
+ hashmap_for_each_entry(&pl->parent_hashmap, &iter, pe, ent) {
+ if (hashmap_get_entry(&pl->recursive_hashmap, pe, ent, NULL))
+ continue;
+
+ if (!hashmap_contains_parent(&pl->recursive_hashmap,
+ pe->pattern,
+ &parent_pattern))
+ string_list_insert(&sl, pe->pattern);
+ }
+
+ string_list_sort(&sl);
+ string_list_remove_duplicates(&sl, 0);
+
+ fprintf(fp, "/*\n!/*/\n");
+
+ for (i = 0; i < sl.nr; i++) {
+ char *pattern = escaped_pattern(sl.items[i].string);
+
+ if (strlen(pattern))
+ fprintf(fp, "%s/\n!%s/*/\n", pattern, pattern);
+ free(pattern);
+ }
+
+ string_list_clear(&sl, 0);
+
+ hashmap_for_each_entry(&pl->recursive_hashmap, &iter, pe, ent) {
+ if (!hashmap_contains_parent(&pl->recursive_hashmap,
+ pe->pattern,
+ &parent_pattern))
+ string_list_insert(&sl, pe->pattern);
+ }
+
+ strbuf_release(&parent_pattern);
+
+ string_list_sort(&sl);
+ string_list_remove_duplicates(&sl, 0);
+
+ for (i = 0; i < sl.nr; i++) {
+ char *pattern = escaped_pattern(sl.items[i].string);
+ fprintf(fp, "%s/\n", pattern);
+ free(pattern);
+ }
+}
+
+static int write_patterns_and_update(struct pattern_list *pl)
+{
+ char *sparse_filename;
+ FILE *fp;
+ int fd;
+ struct lock_file lk = LOCK_INIT;
+ int result;
+
+ sparse_filename = get_sparse_checkout_filename();
+
+ if (safe_create_leading_directories(sparse_filename))
+ die(_("failed to create directory for sparse-checkout file"));
+
+ fd = hold_lock_file_for_update(&lk, sparse_filename,
+ LOCK_DIE_ON_ERROR);
+ free(sparse_filename);
+
+ result = update_working_directory(pl);
+ if (result) {
+ rollback_lock_file(&lk);
+ clear_pattern_list(pl);
+ update_working_directory(NULL);
+ return result;
+ }
+
+ fp = xfdopen(fd, "w");
+
+ if (core_sparse_checkout_cone)
+ write_cone_to_file(fp, pl);
+ else
+ write_patterns_to_file(fp, pl);
+
+ fflush(fp);
+ commit_lock_file(&lk);
+
+ clear_pattern_list(pl);
+
+ return 0;
+}
+
+enum sparse_checkout_mode {
+ MODE_NO_PATTERNS = 0,
+ MODE_ALL_PATTERNS = 1,
+ MODE_CONE_PATTERNS = 2,
+};
+
+static int set_config(enum sparse_checkout_mode mode)
+{
+ /* Update to use worktree config, if not already. */
+ if (init_worktree_config(the_repository)) {
+ error(_("failed to initialize worktree config"));
+ return 1;
+ }
+
+ if (repo_config_set_worktree_gently(the_repository,
+ "core.sparseCheckout",
+ mode ? "true" : "false") ||
+ repo_config_set_worktree_gently(the_repository,
+ "core.sparseCheckoutCone",
+ mode == MODE_CONE_PATTERNS ?
+ "true" : "false"))
+ return 1;
+
+ if (mode == MODE_NO_PATTERNS)
+ return set_sparse_index_config(the_repository, 0);
+
+ return 0;
+}
+
+static int update_modes(int *cone_mode, int *sparse_index)
+{
+ int mode, record_mode;
+
+ /* Determine if we need to record the mode; ensure sparse checkout on */
+ record_mode = (*cone_mode != -1) || !core_apply_sparse_checkout;
+
+ /* If not specified, use previous definition of cone mode */
+ if (*cone_mode == -1 && core_apply_sparse_checkout)
+ *cone_mode = core_sparse_checkout_cone;
+
+ /* Set cone/non-cone mode appropriately */
+ core_apply_sparse_checkout = 1;
+ if (*cone_mode == 1 || *cone_mode == -1) {
+ mode = MODE_CONE_PATTERNS;
+ core_sparse_checkout_cone = 1;
+ } else {
+ mode = MODE_ALL_PATTERNS;
+ core_sparse_checkout_cone = 0;
+ }
+ if (record_mode && set_config(mode))
+ return 1;
+
+ /* Set sparse-index/non-sparse-index mode if specified */
+ if (*sparse_index >= 0) {
+ if (set_sparse_index_config(the_repository, *sparse_index) < 0)
+ die(_("failed to modify sparse-index config"));
+
+ /* force an index rewrite */
+ repo_read_index(the_repository);
+ the_repository->index->updated_workdir = 1;
+
+ if (!*sparse_index)
+ ensure_full_index(the_repository->index);
+ }
+
+ return 0;
+}
+
+static char const * const builtin_sparse_checkout_init_usage[] = {
+ "git sparse-checkout init [--cone] [--[no-]sparse-index]",
+ NULL
+};
+
+static struct sparse_checkout_init_opts {
+ int cone_mode;
+ int sparse_index;
+} init_opts;
+
+static int sparse_checkout_init(int argc, const char **argv, const char *prefix)
+{
+ struct pattern_list pl;
+ char *sparse_filename;
+ int res;
+ struct object_id oid;
+ struct strbuf pattern = STRBUF_INIT;
+
+ static struct option builtin_sparse_checkout_init_options[] = {
+ OPT_BOOL(0, "cone", &init_opts.cone_mode,
+ N_("initialize the sparse-checkout in cone mode")),
+ OPT_BOOL(0, "sparse-index", &init_opts.sparse_index,
+ N_("toggle the use of a sparse index")),
+ OPT_END(),
+ };
+
+ repo_read_index(the_repository);
+
+ init_opts.cone_mode = -1;
+ init_opts.sparse_index = -1;
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_sparse_checkout_init_options,
+ builtin_sparse_checkout_init_usage, 0);
+
+ if (update_modes(&init_opts.cone_mode, &init_opts.sparse_index))
+ 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, 0);
+
+ /* If we already have a sparse-checkout file, use it. */
+ if (res >= 0) {
+ free(sparse_filename);
+ return update_working_directory(NULL);
+ }
+
+ if (get_oid("HEAD", &oid)) {
+ FILE *fp;
+
+ /* assume we are in a fresh repo, but update the sparse-checkout file */
+ if (safe_create_leading_directories(sparse_filename))
+ die(_("unable to create leading directories of %s"),
+ sparse_filename);
+ fp = xfopen(sparse_filename, "w");
+ if (!fp)
+ die(_("failed to open '%s'"), sparse_filename);
+
+ free(sparse_filename);
+ fprintf(fp, "/*\n!/*/\n");
+ fclose(fp);
+ return 0;
+ }
+
+ strbuf_addstr(&pattern, "/*");
+ add_pattern(strbuf_detach(&pattern, NULL), empty_base, 0, &pl, 0);
+ strbuf_addstr(&pattern, "!/*/");
+ add_pattern(strbuf_detach(&pattern, NULL), empty_base, 0, &pl, 0);
+ pl.use_cone_patterns = init_opts.cone_mode;
+
+ return write_patterns_and_update(&pl);
+}
+
+static void insert_recursive_pattern(struct pattern_list *pl, struct strbuf *path)
+{
+ struct pattern_entry *e = xmalloc(sizeof(*e));
+ e->patternlen = path->len;
+ e->pattern = strbuf_detach(path, NULL);
+ hashmap_entry_init(&e->ent, fspathhash(e->pattern));
+
+ hashmap_add(&pl->recursive_hashmap, &e->ent);
+
+ while (e->patternlen) {
+ char *slash = strrchr(e->pattern, '/');
+ char *oldpattern = e->pattern;
+ size_t newlen;
+
+ if (!slash || slash == e->pattern)
+ break;
+
+ newlen = slash - e->pattern;
+ e = xmalloc(sizeof(struct pattern_entry));
+ e->patternlen = newlen;
+ e->pattern = xstrndup(oldpattern, newlen);
+ hashmap_entry_init(&e->ent, fspathhash(e->pattern));
+
+ if (!hashmap_get_entry(&pl->parent_hashmap, e, ent, NULL))
+ hashmap_add(&pl->parent_hashmap, &e->ent);
+ }
+}
+
+static void strbuf_to_cone_pattern(struct strbuf *line, struct pattern_list *pl)
+{
+ strbuf_trim(line);
+
+ strbuf_trim_trailing_dir_sep(line);
+
+ if (strbuf_normalize_path(line))
+ die(_("could not normalize path %s"), line->buf);
+
+ if (!line->len)
+ return;
+
+ if (line->buf[0] != '/')
+ strbuf_insertstr(line, 0, "/");
+
+ insert_recursive_pattern(pl, line);
+}
+
+static void add_patterns_from_input(struct pattern_list *pl,
+ int argc, const char **argv,
+ int use_stdin)
+{
+ int i;
+ if (core_sparse_checkout_cone) {
+ struct strbuf line = STRBUF_INIT;
+
+ hashmap_init(&pl->recursive_hashmap, pl_hashmap_cmp, NULL, 0);
+ hashmap_init(&pl->parent_hashmap, pl_hashmap_cmp, NULL, 0);
+ pl->use_cone_patterns = 1;
+
+ if (use_stdin) {
+ struct strbuf unquoted = STRBUF_INIT;
+ while (!strbuf_getline(&line, stdin)) {
+ if (line.buf[0] == '"') {
+ strbuf_reset(&unquoted);
+ if (unquote_c_style(&unquoted, line.buf, NULL))
+ die(_("unable to unquote C-style string '%s'"),
+ line.buf);
+
+ strbuf_swap(&unquoted, &line);
+ }
+
+ strbuf_to_cone_pattern(&line, pl);
+ }
+
+ strbuf_release(&unquoted);
+ } else {
+ for (i = 0; i < argc; i++) {
+ strbuf_setlen(&line, 0);
+ strbuf_addstr(&line, argv[i]);
+ strbuf_to_cone_pattern(&line, pl);
+ }
+ }
+ } else {
+ if (use_stdin) {
+ struct strbuf line = STRBUF_INIT;
+
+ while (!strbuf_getline(&line, stdin)) {
+ size_t len;
+ char *buf = strbuf_detach(&line, &len);
+ add_pattern(buf, empty_base, 0, pl, 0);
+ }
+ } else {
+ for (i = 0; i < argc; i++)
+ add_pattern(argv[i], empty_base, 0, pl, 0);
+ }
+ }
+}
+
+enum modify_type {
+ REPLACE,
+ ADD,
+};
+
+static void add_patterns_cone_mode(int argc, const char **argv,
+ struct pattern_list *pl,
+ int use_stdin)
+{
+ struct strbuf buffer = STRBUF_INIT;
+ struct pattern_entry *pe;
+ struct hashmap_iter iter;
+ struct pattern_list existing;
+ char *sparse_filename = get_sparse_checkout_filename();
+
+ add_patterns_from_input(pl, argc, argv, use_stdin);
+
+ memset(&existing, 0, sizeof(existing));
+ existing.use_cone_patterns = core_sparse_checkout_cone;
+
+ if (add_patterns_from_file_to_list(sparse_filename, "", 0,
+ &existing, NULL, 0))
+ die(_("unable to load existing sparse-checkout patterns"));
+ free(sparse_filename);
+
+ if (!existing.use_cone_patterns)
+ die(_("existing sparse-checkout patterns do not use cone mode"));
+
+ hashmap_for_each_entry(&existing.recursive_hashmap, &iter, pe, ent) {
+ if (!hashmap_contains_parent(&pl->recursive_hashmap,
+ pe->pattern, &buffer) ||
+ !hashmap_contains_parent(&pl->parent_hashmap,
+ pe->pattern, &buffer)) {
+ strbuf_reset(&buffer);
+ strbuf_addstr(&buffer, pe->pattern);
+ insert_recursive_pattern(pl, &buffer);
+ }
+ }
+
+ clear_pattern_list(&existing);
+ strbuf_release(&buffer);
+}
+
+static void add_patterns_literal(int argc, const char **argv,
+ struct pattern_list *pl,
+ int use_stdin)
+{
+ char *sparse_filename = get_sparse_checkout_filename();
+ if (add_patterns_from_file_to_list(sparse_filename, "", 0,
+ pl, NULL, 0))
+ die(_("unable to load existing sparse-checkout patterns"));
+ free(sparse_filename);
+ add_patterns_from_input(pl, argc, argv, use_stdin);
+}
+
+static int modify_pattern_list(int argc, const char **argv, int use_stdin,
+ enum modify_type m)
+{
+ int result;
+ int changed_config = 0;
+ struct pattern_list *pl = xcalloc(1, sizeof(*pl));
+
+ switch (m) {
+ case ADD:
+ if (core_sparse_checkout_cone)
+ add_patterns_cone_mode(argc, argv, pl, use_stdin);
+ else
+ add_patterns_literal(argc, argv, pl, use_stdin);
+ break;
+
+ case REPLACE:
+ add_patterns_from_input(pl, argc, argv, use_stdin);
+ break;
+ }
+
+ if (!core_apply_sparse_checkout) {
+ set_config(MODE_ALL_PATTERNS);
+ core_apply_sparse_checkout = 1;
+ changed_config = 1;
+ }
+
+ result = write_patterns_and_update(pl);
+
+ if (result && changed_config)
+ set_config(MODE_NO_PATTERNS);
+
+ clear_pattern_list(pl);
+ free(pl);
+ return result;
+}
+
+static void sanitize_paths(int argc, const char **argv,
+ const char *prefix, int skip_checks)
+{
+ int i;
+
+ if (!argc)
+ return;
+
+ if (prefix && *prefix && core_sparse_checkout_cone) {
+ /*
+ * The args are not pathspecs, so unfortunately we
+ * cannot imitate how cmd_add() uses parse_pathspec().
+ */
+ int prefix_len = strlen(prefix);
+
+ for (i = 0; i < argc; i++)
+ argv[i] = prefix_path(prefix, prefix_len, argv[i]);
+ }
+
+ if (skip_checks)
+ return;
+
+ if (prefix && *prefix && !core_sparse_checkout_cone)
+ die(_("please run from the toplevel directory in non-cone mode"));
+
+ if (core_sparse_checkout_cone) {
+ for (i = 0; i < argc; i++) {
+ if (argv[i][0] == '/')
+ die(_("specify directories rather than patterns (no leading slash)"));
+ if (argv[i][0] == '!')
+ die(_("specify directories rather than patterns. If your directory starts with a '!', pass --skip-checks"));
+ if (strpbrk(argv[i], "*?[]"))
+ die(_("specify directories rather than patterns. If your directory really has any of '*?[]\\' in it, pass --skip-checks"));
+ }
+ }
+
+ for (i = 0; i < argc; i++) {
+ struct cache_entry *ce;
+ struct index_state *index = the_repository->index;
+ int pos = index_name_pos(index, argv[i], strlen(argv[i]));
+
+ if (pos < 0)
+ continue;
+ ce = index->cache[pos];
+ if (S_ISSPARSEDIR(ce->ce_mode))
+ continue;
+
+ if (core_sparse_checkout_cone)
+ die(_("'%s' is not a directory; to treat it as a directory anyway, rerun with --skip-checks"), argv[i]);
+ else
+ warning(_("pass a leading slash before paths such as '%s' if you want a single file (see NON-CONE PROBLEMS in the git-sparse-checkout manual)."), argv[i]);
+ }
+}
+
+static char const * const builtin_sparse_checkout_add_usage[] = {
+ N_("git sparse-checkout add [--skip-checks] (--stdin | <patterns>)"),
+ NULL
+};
+
+static struct sparse_checkout_add_opts {
+ int skip_checks;
+ int use_stdin;
+} add_opts;
+
+static int sparse_checkout_add(int argc, const char **argv, const char *prefix)
+{
+ static struct option builtin_sparse_checkout_add_options[] = {
+ OPT_BOOL_F(0, "skip-checks", &add_opts.skip_checks,
+ N_("skip some sanity checks on the given paths that might give false positives"),
+ PARSE_OPT_NONEG),
+ OPT_BOOL(0, "stdin", &add_opts.use_stdin,
+ N_("read patterns from standard in")),
+ OPT_END(),
+ };
+
+ if (!core_apply_sparse_checkout)
+ die(_("no sparse-checkout to add to"));
+
+ repo_read_index(the_repository);
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_sparse_checkout_add_options,
+ builtin_sparse_checkout_add_usage,
+ PARSE_OPT_KEEP_UNKNOWN_OPT);
+
+ sanitize_paths(argc, argv, prefix, add_opts.skip_checks);
+
+ return modify_pattern_list(argc, argv, add_opts.use_stdin, ADD);
+}
+
+static char const * const builtin_sparse_checkout_set_usage[] = {
+ N_("git sparse-checkout set [--[no-]cone] [--[no-]sparse-index] [--skip-checks] (--stdin | <patterns>)"),
+ NULL
+};
+
+static struct sparse_checkout_set_opts {
+ int cone_mode;
+ int sparse_index;
+ int skip_checks;
+ int use_stdin;
+} set_opts;
+
+static int sparse_checkout_set(int argc, const char **argv, const char *prefix)
+{
+ int default_patterns_nr = 2;
+ const char *default_patterns[] = {"/*", "!/*/", NULL};
+
+ static struct option builtin_sparse_checkout_set_options[] = {
+ OPT_BOOL(0, "cone", &set_opts.cone_mode,
+ N_("initialize the sparse-checkout in cone mode")),
+ OPT_BOOL(0, "sparse-index", &set_opts.sparse_index,
+ N_("toggle the use of a sparse index")),
+ OPT_BOOL_F(0, "skip-checks", &set_opts.skip_checks,
+ N_("skip some sanity checks on the given paths that might give false positives"),
+ PARSE_OPT_NONEG),
+ OPT_BOOL_F(0, "stdin", &set_opts.use_stdin,
+ N_("read patterns from standard in"),
+ PARSE_OPT_NONEG),
+ OPT_END(),
+ };
+
+ repo_read_index(the_repository);
+
+ set_opts.cone_mode = -1;
+ set_opts.sparse_index = -1;
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_sparse_checkout_set_options,
+ builtin_sparse_checkout_set_usage,
+ PARSE_OPT_KEEP_UNKNOWN_OPT);
+
+ if (update_modes(&set_opts.cone_mode, &set_opts.sparse_index))
+ return 1;
+
+ /*
+ * Cone mode automatically specifies the toplevel directory. For
+ * non-cone mode, if nothing is specified, manually select just the
+ * top-level directory (much as 'init' would do).
+ */
+ if (!core_sparse_checkout_cone && argc == 0) {
+ argv = default_patterns;
+ argc = default_patterns_nr;
+ } else {
+ sanitize_paths(argc, argv, prefix, set_opts.skip_checks);
+ }
+
+ return modify_pattern_list(argc, argv, set_opts.use_stdin, REPLACE);
+}
+
+static char const * const builtin_sparse_checkout_reapply_usage[] = {
+ "git sparse-checkout reapply [--[no-]cone] [--[no-]sparse-index]",
+ NULL
+};
+
+static struct sparse_checkout_reapply_opts {
+ int cone_mode;
+ int sparse_index;
+} reapply_opts;
+
+static int sparse_checkout_reapply(int argc, const char **argv,
+ const char *prefix)
+{
+ static struct option builtin_sparse_checkout_reapply_options[] = {
+ OPT_BOOL(0, "cone", &reapply_opts.cone_mode,
+ N_("initialize the sparse-checkout in cone mode")),
+ OPT_BOOL(0, "sparse-index", &reapply_opts.sparse_index,
+ N_("toggle the use of a sparse index")),
+ OPT_END(),
+ };
+
+ if (!core_apply_sparse_checkout)
+ die(_("must be in a sparse-checkout to reapply sparsity patterns"));
+
+ reapply_opts.cone_mode = -1;
+ reapply_opts.sparse_index = -1;
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_sparse_checkout_reapply_options,
+ builtin_sparse_checkout_reapply_usage, 0);
+
+ repo_read_index(the_repository);
+
+ if (update_modes(&reapply_opts.cone_mode, &reapply_opts.sparse_index))
+ return 1;
+
+ return update_working_directory(NULL);
+}
+
+static char const * const builtin_sparse_checkout_disable_usage[] = {
+ "git sparse-checkout disable",
+ NULL
+};
+
+static int sparse_checkout_disable(int argc, const char **argv,
+ const char *prefix)
+{
+ static struct option builtin_sparse_checkout_disable_options[] = {
+ OPT_END(),
+ };
+ struct pattern_list pl;
+ struct strbuf match_all = STRBUF_INIT;
+
+ /*
+ * We do not exit early if !core_apply_sparse_checkout; due to the
+ * ability for users to manually muck things up between
+ * direct editing of .git/info/sparse-checkout
+ * running read-tree -m u HEAD or update-index --skip-worktree
+ * direct toggling of config options
+ * users might end up with an index with SKIP_WORKTREE bit set on
+ * some files and not know how to undo it. So, here we just
+ * forcibly return to a dense checkout regardless of initial state.
+ */
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_sparse_checkout_disable_options,
+ builtin_sparse_checkout_disable_usage, 0);
+
+ repo_read_index(the_repository);
+
+ memset(&pl, 0, sizeof(pl));
+ hashmap_init(&pl.recursive_hashmap, pl_hashmap_cmp, NULL, 0);
+ hashmap_init(&pl.parent_hashmap, pl_hashmap_cmp, NULL, 0);
+ pl.use_cone_patterns = 0;
+ core_apply_sparse_checkout = 1;
+
+ strbuf_addstr(&match_all, "/*");
+ add_pattern(strbuf_detach(&match_all, NULL), empty_base, 0, &pl, 0);
+
+ prepare_repo_settings(the_repository);
+ the_repository->settings.sparse_index = 0;
+
+ if (update_working_directory(&pl))
+ die(_("error while refreshing working directory"));
+
+ clear_pattern_list(&pl);
+ return set_config(MODE_NO_PATTERNS);
+}
+
+int cmd_sparse_checkout(int argc, const char **argv, const char *prefix)
+{
+ parse_opt_subcommand_fn *fn = NULL;
+ struct option builtin_sparse_checkout_options[] = {
+ OPT_SUBCOMMAND("list", &fn, sparse_checkout_list),
+ OPT_SUBCOMMAND("init", &fn, sparse_checkout_init),
+ OPT_SUBCOMMAND("set", &fn, sparse_checkout_set),
+ OPT_SUBCOMMAND("add", &fn, sparse_checkout_add),
+ OPT_SUBCOMMAND("reapply", &fn, sparse_checkout_reapply),
+ OPT_SUBCOMMAND("disable", &fn, sparse_checkout_disable),
+ OPT_END(),
+ };
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_sparse_checkout_options,
+ builtin_sparse_checkout_usage, 0);
+
+ git_config(git_default_config, NULL);
+
+ prepare_repo_settings(the_repository);
+ the_repository->settings.command_requires_full_index = 0;
+
+ return fn(argc, argv, prefix);
+}