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-rw-r--r--builtin/sparse-checkout.c631
1 files changed, 631 insertions, 0 deletions
diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c
new file mode 100644
index 0000000000..740da4b6d5
--- /dev/null
+++ b/builtin/sparse-checkout.c
@@ -0,0 +1,631 @@
+#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"
+#include "string-list.h"
+#include "cache.h"
+#include "cache-tree.h"
+#include "lockfile.h"
+#include "resolve-undo.h"
+#include "unpack-trees.h"
+#include "wt-status.h"
+#include "quote.h"
+
+static const char *empty_base = "";
+
+static char const * const builtin_sparse_checkout_usage[] = {
+ N_("git sparse-checkout (init|list|set|add|disable) <options>"),
+ 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));
+
+ 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);
+ 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 int update_working_directory(struct pattern_list *pl)
+{
+ int result = 0;
+ struct unpack_trees_options o;
+ struct lock_file lock_file = LOCK_INIT;
+ struct object_id oid;
+ struct tree *tree;
+ struct tree_desc t;
+ struct repository *r = the_repository;
+
+ if (repo_read_index_unmerged(r))
+ die(_("you need to resolve your current index first"));
+
+ if (get_oid("HEAD", &oid))
+ return 0;
+
+ tree = parse_tree_indirect(&oid);
+ parse_tree(tree);
+ init_tree_desc(&t, tree->buffer, tree->size);
+
+ memset(&o, 0, sizeof(o));
+ o.verbose_update = isatty(2);
+ o.merge = 1;
+ o.update = 1;
+ o.fn = oneway_merge;
+ o.head_idx = -1;
+ o.src_index = r->index;
+ o.dst_index = r->index;
+ o.skip_sparse_checkout = 0;
+ o.pl = pl;
+ o.keep_pattern_list = !!pl;
+
+ resolve_undo_clear_index(r->index);
+ setup_work_tree();
+
+ cache_tree_free(&r->index->cache_tree);
+
+ repo_hold_locked_index(r, &lock_file, LOCK_DIE_ON_ERROR);
+
+ core_apply_sparse_checkout = 1;
+ result = unpack_trees(1, &t, &o);
+
+ if (!result) {
+ prime_cache_tree(r, r->index, tree);
+ write_locked_index(r->index, &lock_file, COMMIT_LOCK);
+ } else
+ rollback_lock_file(&lock_file);
+
+ 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);
+
+ result = update_working_directory(pl);
+ if (result) {
+ rollback_lock_file(&lk);
+ free(sparse_filename);
+ 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);
+
+ free(sparse_filename);
+ 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)
+{
+ const char *config_path;
+
+ if (git_config_set_gently("extensions.worktreeConfig", "true")) {
+ error(_("failed to set extensions.worktreeConfig setting"));
+ return 1;
+ }
+
+ config_path = git_path("config.worktree");
+ git_config_set_in_file_gently(config_path,
+ "core.sparseCheckout",
+ mode ? "true" : NULL);
+
+ git_config_set_in_file_gently(config_path,
+ "core.sparseCheckoutCone",
+ mode == MODE_CONE_PATTERNS ? "true" : NULL);
+
+ return 0;
+}
+
+static char const * const builtin_sparse_checkout_init_usage[] = {
+ N_("git sparse-checkout init [--cone]"),
+ NULL
+};
+
+static struct sparse_checkout_init_opts {
+ int cone_mode;
+} init_opts;
+
+static int sparse_checkout_init(int argc, const char **argv)
+{
+ struct pattern_list pl;
+ char *sparse_filename;
+ int res;
+ struct object_id oid;
+ int mode;
+ 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_END(),
+ };
+
+ repo_read_index(the_repository);
+ require_clean_work_tree(the_repository,
+ N_("initialize sparse-checkout"), NULL, 1, 0);
+
+ argc = parse_options(argc, argv, NULL,
+ builtin_sparse_checkout_init_options,
+ builtin_sparse_checkout_init_usage, 0);
+
+ if (init_opts.cone_mode) {
+ mode = MODE_CONE_PATTERNS;
+ core_sparse_checkout_cone = 1;
+ } else
+ mode = MODE_ALL_PATTERNS;
+
+ if (set_config(mode))
+ 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);
+ core_apply_sparse_checkout = 1;
+ 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 */
+ 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);
+
+ 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,
+ ignore_case ?
+ strihash(e->pattern) :
+ strhash(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 == 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,
+ ignore_case ?
+ strihash(e->pattern) :
+ strhash(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 char const * const builtin_sparse_checkout_set_usage[] = {
+ N_("git sparse-checkout (set|add) (--stdin | <patterns>)"),
+ NULL
+};
+
+static struct sparse_checkout_set_opts {
+ int use_stdin;
+} set_opts;
+
+static void add_patterns_from_input(struct pattern_list *pl,
+ int argc, const char **argv)
+{
+ 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 (set_opts.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 (set_opts.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)
+{
+ 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);
+
+ 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))
+ die(_("unable to load existing sparse-checkout patterns"));
+ free(sparse_filename);
+
+ 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)
+{
+ char *sparse_filename = get_sparse_checkout_filename();
+ if (add_patterns_from_file_to_list(sparse_filename, "", 0,
+ pl, NULL))
+ die(_("unable to load existing sparse-checkout patterns"));
+ free(sparse_filename);
+ add_patterns_from_input(pl, argc, argv);
+}
+
+static int modify_pattern_list(int argc, const char **argv, enum modify_type m)
+{
+ int result;
+ int changed_config = 0;
+ struct pattern_list pl;
+ memset(&pl, 0, sizeof(pl));
+
+ switch (m) {
+ case ADD:
+ if (core_sparse_checkout_cone)
+ add_patterns_cone_mode(argc, argv, &pl);
+ else
+ add_patterns_literal(argc, argv, &pl);
+ break;
+
+ case REPLACE:
+ add_patterns_from_input(&pl, argc, argv);
+ 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);
+ return result;
+}
+
+static int sparse_checkout_set(int argc, const char **argv, const char *prefix,
+ enum modify_type m)
+{
+ static struct option builtin_sparse_checkout_set_options[] = {
+ OPT_BOOL(0, "stdin", &set_opts.use_stdin,
+ N_("read patterns from standard in")),
+ OPT_END(),
+ };
+
+ repo_read_index(the_repository);
+ require_clean_work_tree(the_repository,
+ N_("set sparse-checkout patterns"), NULL, 1, 0);
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_sparse_checkout_set_options,
+ builtin_sparse_checkout_set_usage,
+ PARSE_OPT_KEEP_UNKNOWN);
+
+ return modify_pattern_list(argc, argv, m);
+}
+
+static int sparse_checkout_disable(int argc, const char **argv)
+{
+ struct pattern_list pl;
+ struct strbuf match_all = STRBUF_INIT;
+
+ repo_read_index(the_repository);
+ require_clean_work_tree(the_repository,
+ N_("disable sparse-checkout"), NULL, 1, 0);
+
+ 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);
+
+ 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)
+{
+ 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);
+ if (!strcmp(argv[0], "init"))
+ return sparse_checkout_init(argc, argv);
+ if (!strcmp(argv[0], "set"))
+ return sparse_checkout_set(argc, argv, prefix, REPLACE);
+ if (!strcmp(argv[0], "add"))
+ return sparse_checkout_set(argc, argv, prefix, ADD);
+ if (!strcmp(argv[0], "disable"))
+ return sparse_checkout_disable(argc, argv);
+ }
+
+ usage_with_options(builtin_sparse_checkout_usage,
+ builtin_sparse_checkout_options);
+}