1 files changed, 346 insertions, 0 deletions
diff --git a/builtin/checkout-index.c b/builtin/checkout-index.c
new file mode 100644
index 0000000..3b68b47
--- /dev/null
+++ b/builtin/checkout-index.c
@@ -0,0 +1,346 @@
+/*
+ * Check-out files from the "current cache directory"
+ *
+ * Copyright (C) 2005 Linus Torvalds
+ *
+ */
+#define USE_THE_INDEX_VARIABLE
+#include "builtin.h"
+#include "config.h"
+#include "dir.h"
+#include "gettext.h"
+#include "lockfile.h"
+#include "quote.h"
+#include "repository.h"
+#include "cache-tree.h"
+#include "parse-options.h"
+#include "entry.h"
+#include "parallel-checkout.h"
+#include "read-cache-ll.h"
+#include "setup.h"
+#include "sparse-index.h"
+
+#define CHECKOUT_ALL 4
+static int nul_term_line;
+static int checkout_stage; /* default to checkout stage0 */
+static int ignore_skip_worktree; /* default to 0 */
+static int to_tempfile = -1;
+static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
+
+static struct checkout state = CHECKOUT_INIT;
+
+static void write_tempfile_record(const char *name, const char *prefix)
+{
+	int i;
+	int have_tempname = 0;
+
+	if (CHECKOUT_ALL == checkout_stage) {
+		for (i = 1; i < 4; i++)
+			if (topath[i][0]) {
+				have_tempname = 1;
+				break;
+			}
+
+		if (have_tempname) {
+			for (i = 1; i < 4; i++) {
+				if (i > 1)
+					putchar(' ');
+				if (topath[i][0])
+					fputs(topath[i], stdout);
+				else
+					putchar('.');
+			}
+		}
+	} else if (topath[checkout_stage][0]) {
+		have_tempname = 1;
+		fputs(topath[checkout_stage], stdout);
+	}
+
+	if (have_tempname) {
+		putchar('\t');
+		write_name_quoted_relative(name, prefix, stdout,
+					   nul_term_line ? '\0' : '\n');
+	}
+
+	for (i = 0; i < 4; i++) {
+		topath[i][0] = 0;
+	}
+}
+
+static int checkout_file(const char *name, const char *prefix)
+{
+	int namelen = strlen(name);
+	int pos = index_name_pos(&the_index, name, namelen);
+	int has_same_name = 0;
+	int is_file = 0;
+	int is_skipped = 1;
+	int did_checkout = 0;
+	int errs = 0;
+
+	if (pos < 0)
+		pos = -pos - 1;
+
+	while (pos < the_index.cache_nr) {
+		struct cache_entry *ce = the_index.cache[pos];
+		if (ce_namelen(ce) != namelen ||
+		    memcmp(ce->name, name, namelen))
+			break;
+		has_same_name = 1;
+		pos++;
+		if (S_ISSPARSEDIR(ce->ce_mode))
+			break;
+		is_file = 1;
+		if (!ignore_skip_worktree && ce_skip_worktree(ce))
+			break;
+		is_skipped = 0;
+		if (ce_stage(ce) != checkout_stage
+		    && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
+			continue;
+		did_checkout = 1;
+		if (checkout_entry(ce, &state,
+				   to_tempfile ? topath[ce_stage(ce)] : NULL,
+				   NULL) < 0)
+			errs++;
+	}
+
+	if (did_checkout) {
+		if (to_tempfile)
+			write_tempfile_record(name, prefix);
+		return errs > 0 ? -1 : 0;
+	}
+
+	/*
+	 * At this point we know we didn't try to check anything out. If it was
+	 * because we did find an entry but it was stage 0, that's not an
+	 * error.
+	 */
+	if (has_same_name && checkout_stage == CHECKOUT_ALL)
+		return 0;
+
+	if (!state.quiet) {
+		fprintf(stderr, "git checkout-index: %s ", name);
+		if (!has_same_name)
+			fprintf(stderr, "is not in the cache");
+		else if (!is_file)
+			fprintf(stderr, "is a sparse directory");
+		else if (is_skipped)
+			fprintf(stderr, "has skip-worktree enabled; "
+					"use '--ignore-skip-worktree-bits' to checkout");
+		else if (checkout_stage)
+			fprintf(stderr, "does not exist at stage %d",
+				checkout_stage);
+		else
+			fprintf(stderr, "is unmerged");
+		fputc('\n', stderr);
+	}
+	return -1;
+}
+
+static int checkout_all(const char *prefix, int prefix_length)
+{
+	int i, errs = 0;
+	struct cache_entry *last_ce = NULL;
+
+	for (i = 0; i < the_index.cache_nr ; i++) {
+		struct cache_entry *ce = the_index.cache[i];
+
+		if (S_ISSPARSEDIR(ce->ce_mode)) {
+			if (!ce_skip_worktree(ce))
+				BUG("sparse directory '%s' does not have skip-worktree set", ce->name);
+
+			/*
+			 * If the current entry is a sparse directory and skip-worktree
+			 * entries are being checked out, expand the index and continue
+			 * the loop on the current index position (now pointing to the
+			 * first entry inside the expanded sparse directory).
+			 */
+			if (ignore_skip_worktree) {
+				ensure_full_index(&the_index);
+				ce = the_index.cache[i];
+			}
+		}
+
+		if (!ignore_skip_worktree && ce_skip_worktree(ce))
+			continue;
+		if (ce_stage(ce) != checkout_stage
+		    && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
+			continue;
+		if (prefix && *prefix &&
+		    (ce_namelen(ce) <= prefix_length ||
+		     memcmp(prefix, ce->name, prefix_length)))
+			continue;
+		if (last_ce && to_tempfile) {
+			if (ce_namelen(last_ce) != ce_namelen(ce)
+			    || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
+				write_tempfile_record(last_ce->name, prefix);
+		}
+		if (checkout_entry(ce, &state,
+				   to_tempfile ? topath[ce_stage(ce)] : NULL,
+				   NULL) < 0)
+			errs++;
+		last_ce = ce;
+	}
+	if (last_ce && to_tempfile)
+		write_tempfile_record(last_ce->name, prefix);
+	return !!errs;
+}
+
+static const char * const builtin_checkout_index_usage[] = {
+	N_("git checkout-index [<options>] [--] [<file>...]"),
+	NULL
+};
+
+static int option_parse_stage(const struct option *opt,
+			      const char *arg, int unset)
+{
+	int *stage = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+
+	if (!strcmp(arg, "all")) {
+		*stage = CHECKOUT_ALL;
+	} else {
+		int ch = arg[0];
+		if ('1' <= ch && ch <= '3')
+			*stage = arg[0] - '0';
+		else
+			die(_("stage should be between 1 and 3 or all"));
+	}
+	return 0;
+}
+
+int cmd_checkout_index(int argc, const char **argv, const char *prefix)
+{
+	int i;
+	struct lock_file lock_file = LOCK_INIT;
+	int all = 0;
+	int read_from_stdin = 0;
+	int prefix_length;
+	int force = 0, quiet = 0, not_new = 0;
+	int index_opt = 0;
+	int err = 0;
+	int pc_workers, pc_threshold;
+	struct option builtin_checkout_index_options[] = {
+		OPT_BOOL('a', "all", &all,
+			N_("check out all files in the index")),
+		OPT_BOOL(0, "ignore-skip-worktree-bits", &ignore_skip_worktree,
+			N_("do not skip files with skip-worktree set")),
+		OPT__FORCE(&force, N_("force overwrite of existing files"), 0),
+		OPT__QUIET(&quiet,
+			N_("no warning for existing files and files not in index")),
+		OPT_BOOL('n', "no-create", &not_new,
+			N_("don't checkout new files")),
+		OPT_BOOL('u', "index", &index_opt,
+			 N_("update stat information in the index file")),
+		OPT_BOOL('z', NULL, &nul_term_line,
+			N_("paths are separated with NUL character")),
+		OPT_BOOL(0, "stdin", &read_from_stdin,
+			N_("read list of paths from the standard input")),
+		OPT_BOOL(0, "temp", &to_tempfile,
+			N_("write the content to temporary files")),
+		OPT_STRING(0, "prefix", &state.base_dir, N_("string"),
+			N_("when creating files, prepend <string>")),
+		OPT_CALLBACK_F(0, "stage", &checkout_stage, "(1|2|3|all)",
+			N_("copy out the files from named stage"),
+			PARSE_OPT_NONEG, option_parse_stage),
+		OPT_END()
+	};
+
+	if (argc == 2 && !strcmp(argv[1], "-h"))
+		usage_with_options(builtin_checkout_index_usage,
+				   builtin_checkout_index_options);
+	git_config(git_default_config, NULL);
+	prefix_length = prefix ? strlen(prefix) : 0;
+
+	prepare_repo_settings(the_repository);
+	the_repository->settings.command_requires_full_index = 0;
+
+	if (repo_read_index(the_repository) < 0) {
+		die("invalid cache");
+	}
+
+	argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
+			builtin_checkout_index_usage, 0);
+	state.istate = &the_index;
+	state.force = force;
+	state.quiet = quiet;
+	state.not_new = not_new;
+
+	if (!state.base_dir)
+		state.base_dir = "";
+	state.base_dir_len = strlen(state.base_dir);
+
+	if (to_tempfile < 0)
+		to_tempfile = (checkout_stage == CHECKOUT_ALL);
+	if (!to_tempfile && checkout_stage == CHECKOUT_ALL)
+		die(_("options '%s' and '%s' cannot be used together"),
+		    "--stage=all", "--no-temp");
+
+	/*
+	 * when --prefix is specified we do not want to update cache.
+	 */
+	if (index_opt && !state.base_dir_len && !to_tempfile) {
+		state.refresh_cache = 1;
+		state.istate = &the_index;
+		repo_hold_locked_index(the_repository, &lock_file,
+				       LOCK_DIE_ON_ERROR);
+	}
+
+	get_parallel_checkout_configs(&pc_workers, &pc_threshold);
+	if (pc_workers > 1)
+		init_parallel_checkout();
+
+	/* Check out named files first */
+	for (i = 0; i < argc; i++) {
+		const char *arg = argv[i];
+		char *p;
+
+		if (all)
+			die("git checkout-index: don't mix '--all' and explicit filenames");
+		if (read_from_stdin)
+			die("git checkout-index: don't mix '--stdin' and explicit filenames");
+		p = prefix_path(prefix, prefix_length, arg);
+		err |= checkout_file(p, prefix);
+		free(p);
+	}
+
+	if (read_from_stdin) {
+		struct strbuf buf = STRBUF_INIT;
+		struct strbuf unquoted = STRBUF_INIT;
+		strbuf_getline_fn getline_fn;
+
+		if (all)
+			die("git checkout-index: don't mix '--all' and '--stdin'");
+
+		getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
+		while (getline_fn(&buf, stdin) != EOF) {
+			char *p;
+			if (!nul_term_line && buf.buf[0] == '"') {
+				strbuf_reset(&unquoted);
+				if (unquote_c_style(&unquoted, buf.buf, NULL))
+					die("line is badly quoted");
+				strbuf_swap(&buf, &unquoted);
+			}
+			p = prefix_path(prefix, prefix_length, buf.buf);
+			err |= checkout_file(p, prefix);
+			free(p);
+		}
+		strbuf_release(&unquoted);
+		strbuf_release(&buf);
+	}
+
+	if (all)
+		err |= checkout_all(prefix, prefix_length);
+
+	if (pc_workers > 1)
+		err |= run_parallel_checkout(&state, pc_workers, pc_threshold,
+					     NULL, NULL);
+
+	if (err)
+		return 1;
+
+	if (is_lock_file_locked(&lock_file) &&
+	    write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+		die("Unable to write new index file");
+	return 0;
+}