builtin/checkout-index.c - jrn/git - Git at Google

 /*
  * Check-out files from the "current cache directory"
  *
  * Copyright (C) 2005 Linus Torvalds
  *
  */
 #define USE_THE_INDEX_COMPATIBILITY_MACROS
 #include "builtin.h"
 #include "config.h"
 #include "lockfile.h"
 #include "quote.h"
 #include "cache-tree.h"
 #include "parse-options.h"
 #include "entry.h"
 #include "parallel-checkout.h"

 #define CHECKOUT_ALL 4
 static int nul_term_line;
 static int checkout_stage; /* default to checkout stage0 */
 static int to_tempfile;
 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 = cache_name_pos(name, namelen);
 	int has_same_name = 0;
 	int did_checkout = 0;
 	int errs = 0;

 	if (pos < 0)
 		pos = -pos - 1;

 	while (pos < active_nr) {
 		struct cache_entry *ce = active_cache[pos];
 		if (ce_namelen(ce) != namelen ||
 		    memcmp(ce->name, name, namelen))
 			break;
 		has_same_name = 1;
 		pos++;
 		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 (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 < active_nr ; i++) {
 		struct cache_entry *ce = active_cache[i];
 		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)
 {
 	BUG_ON_OPT_NEG(unset);

 	if (!strcmp(arg, "all")) {
 		to_tempfile = 1;
 		checkout_stage = CHECKOUT_ALL;
 	} else {
 		int ch = arg[0];
 		if ('1' <= ch && ch <= '3')
 			checkout_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__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", NULL, "(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;

 	if (read_cache() < 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);

 	/*
 	 * 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;
 		hold_locked_index(&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;
 }
	/*
	* Check-out files from the "current cache directory"
	*
	* Copyright (C) 2005 Linus Torvalds
	*
	*/
	#define USE_THE_INDEX_COMPATIBILITY_MACROS
	#include "builtin.h"
	#include "config.h"
	#include "lockfile.h"
	#include "quote.h"
	#include "cache-tree.h"
	#include "parse-options.h"
	#include "entry.h"
	#include "parallel-checkout.h"

	#define CHECKOUT_ALL 4
	static int nul_term_line;
	static int checkout_stage; /* default to checkout stage0 */
	static int to_tempfile;
	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 = cache_name_pos(name, namelen);
	int has_same_name = 0;
	int did_checkout = 0;
	int errs = 0;

	if (pos < 0)
	pos = -pos - 1;

	while (pos < active_nr) {
	struct cache_entry *ce = active_cache[pos];
	if (ce_namelen(ce) != namelen \|\|
	memcmp(ce->name, name, namelen))
	break;
	has_same_name = 1;
	pos++;
	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 (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 < active_nr ; i++) {
	struct cache_entry *ce = active_cache[i];
	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)
	{
	BUG_ON_OPT_NEG(unset);

	if (!strcmp(arg, "all")) {
	to_tempfile = 1;
	checkout_stage = CHECKOUT_ALL;
	} else {
	int ch = arg[0];
	if ('1' <= ch && ch <= '3')
	checkout_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__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", NULL, "(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;

	if (read_cache() < 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);

	/*
	* 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;
	hold_locked_index(&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;
	}