builtin/add.c - git - Git at Google

 /*
  * "git add" builtin command
  *
  * Copyright (C) 2006 Linus Torvalds
  */
 #include "cache.h"
 #include "builtin.h"
 #include "dir.h"
 #include "exec_cmd.h"
 #include "cache-tree.h"
 #include "run-command.h"
 #include "parse-options.h"
 #include "diff.h"
 #include "diffcore.h"
 #include "revision.h"

 static const char * const builtin_add_usage[] = {
 	"git add [options] [--] <filepattern>...",
 	NULL
 };
 static int patch_interactive, add_interactive, edit_interactive;
 static int take_worktree_changes;

 struct update_callback_data
 {
 	int flags;
 	int add_errors;
 };

 static void update_callback(struct diff_queue_struct *q,
 			    struct diff_options *opt, void *cbdata)
 {
 	int i;
 	struct update_callback_data *data = cbdata;

 	for (i = 0; i < q->nr; i++) {
 		struct diff_filepair *p = q->queue[i];
 		const char *path = p->one->path;
 		switch (p->status) {
 		default:
 			die("unexpected diff status %c", p->status);
 		case DIFF_STATUS_UNMERGED:
 			/*
 			 * ADD_CACHE_IGNORE_REMOVAL is unset if "git
 			 * add -u" is calling us, In such a case, a
 			 * missing work tree file needs to be removed
 			 * if there is an unmerged entry at stage #2,
 			 * but such a diff record is followed by
 			 * another with DIFF_STATUS_DELETED (and if
 			 * there is no stage #2, we won't see DELETED
 			 * nor MODIFIED).  We can simply continue
 			 * either way.
 			 */
 			if (!(data->flags & ADD_CACHE_IGNORE_REMOVAL))
 				continue;
 			/*
 			 * Otherwise, it is "git add path" is asking
 			 * to explicitly add it; we fall through.  A
 			 * missing work tree file is an error and is
 			 * caught by add_file_to_index() in such a
 			 * case.
 			 */
 		case DIFF_STATUS_MODIFIED:
 		case DIFF_STATUS_TYPE_CHANGED:
 			if (add_file_to_index(&the_index, path, data->flags)) {
 				if (!(data->flags & ADD_CACHE_IGNORE_ERRORS))
 					die("updating files failed");
 				data->add_errors++;
 			}
 			break;
 		case DIFF_STATUS_DELETED:
 			if (data->flags & ADD_CACHE_IGNORE_REMOVAL)
 				break;
 			if (!(data->flags & ADD_CACHE_PRETEND))
 				remove_file_from_index(&the_index, path);
 			if (data->flags & (ADD_CACHE_PRETEND|ADD_CACHE_VERBOSE))
 				printf("remove '%s'\n", path);
 			break;
 		}
 	}
 }

 int add_files_to_cache(const char *prefix, const char **pathspec, int flags)
 {
 	struct update_callback_data data;
 	struct rev_info rev;
 	init_revisions(&rev, prefix);
 	setup_revisions(0, NULL, &rev, NULL);
 	rev.prune_data = pathspec;
 	rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 	rev.diffopt.format_callback = update_callback;
 	data.flags = flags;
 	data.add_errors = 0;
 	rev.diffopt.format_callback_data = &data;
 	run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
 	return !!data.add_errors;
 }

 static void fill_pathspec_matches(const char **pathspec, char *seen, int specs)
 {
 	int num_unmatched = 0, i;

 	/*
 	 * Since we are walking the index as if we were walking the directory,
 	 * we have to mark the matched pathspec as seen; otherwise we will
 	 * mistakenly think that the user gave a pathspec that did not match
 	 * anything.
 	 */
 	for (i = 0; i < specs; i++)
 		if (!seen[i])
 			num_unmatched++;
 	if (!num_unmatched)
 		return;
 	for (i = 0; i < active_nr; i++) {
 		struct cache_entry *ce = active_cache[i];
 		match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen);
 	}
 }

 static char *find_used_pathspec(const char **pathspec)
 {
 	char *seen;
 	int i;

 	for (i = 0; pathspec[i];  i++)
 		; /* just counting */
 	seen = xcalloc(i, 1);
 	fill_pathspec_matches(pathspec, seen, i);
 	return seen;
 }

 static char *prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
 {
 	char *seen;
 	int i, specs;
 	struct dir_entry **src, **dst;

 	for (specs = 0; pathspec[specs];  specs++)
 		/* nothing */;
 	seen = xcalloc(specs, 1);

 	src = dst = dir->entries;
 	i = dir->nr;
 	while (--i >= 0) {
 		struct dir_entry *entry = *src++;
 		if (match_pathspec(pathspec, entry->name, entry->len,
 				   prefix, seen))
 			*dst++ = entry;
 	}
 	dir->nr = dst - dir->entries;
 	fill_pathspec_matches(pathspec, seen, specs);
 	return seen;
 }

 static void treat_gitlinks(const char **pathspec)
 {
 	int i;

 	if (!pathspec || !*pathspec)
 		return;

 	for (i = 0; i < active_nr; i++) {
 		struct cache_entry *ce = active_cache[i];
 		if (S_ISGITLINK(ce->ce_mode)) {
 			int len = ce_namelen(ce), j;
 			for (j = 0; pathspec[j]; j++) {
 				int len2 = strlen(pathspec[j]);
 				if (len2 <= len || pathspec[j][len] != '/' ||
 				    memcmp(ce->name, pathspec[j], len))
 					continue;
 				if (len2 == len + 1)
 					/* strip trailing slash */
 					pathspec[j] = xstrndup(ce->name, len);
 				else
 					die ("Path '%s' is in submodule '%.*s'",
 						pathspec[j], len, ce->name);
 			}
 		}
 	}
 }

 static void refresh(int verbose, const char **pathspec)
 {
 	char *seen;
 	int i, specs;

 	for (specs = 0; pathspec[specs];  specs++)
 		/* nothing */;
 	seen = xcalloc(specs, 1);
 	refresh_index(&the_index, verbose ? REFRESH_IN_PORCELAIN : REFRESH_QUIET,
 		      pathspec, seen, "Unstaged changes after refreshing the index:");
 	for (i = 0; i < specs; i++) {
 		if (!seen[i])
 			die("pathspec '%s' did not match any files", pathspec[i]);
 	}
         free(seen);
 }

 static const char **validate_pathspec(int argc, const char **argv, const char *prefix)
 {
 	const char **pathspec = get_pathspec(prefix, argv);

 	if (pathspec) {
 		const char **p;
 		for (p = pathspec; *p; p++) {
 			if (has_symlink_leading_path(*p, strlen(*p))) {
 				int len = prefix ? strlen(prefix) : 0;
 				die("'%s' is beyond a symbolic link", *p + len);
 			}
 		}
 	}

 	return pathspec;
 }

 int run_add_interactive(const char *revision, const char *patch_mode,
 			const char **pathspec)
 {
 	int status, ac, pc = 0;
 	const char **args;

 	if (pathspec)
 		while (pathspec[pc])
 			pc++;

 	args = xcalloc(sizeof(const char *), (pc + 5));
 	ac = 0;
 	args[ac++] = "add--interactive";
 	if (patch_mode)
 		args[ac++] = patch_mode;
 	if (revision)
 		args[ac++] = revision;
 	args[ac++] = "--";
 	if (pc) {
 		memcpy(&(args[ac]), pathspec, sizeof(const char *) * pc);
 		ac += pc;
 	}
 	args[ac] = NULL;

 	status = run_command_v_opt(args, RUN_GIT_CMD);
 	free(args);
 	return status;
 }

 int interactive_add(int argc, const char **argv, const char *prefix)
 {
 	const char **pathspec = NULL;

 	if (argc) {
 		pathspec = validate_pathspec(argc, argv, prefix);
 		if (!pathspec)
 			return -1;
 	}

 	return run_add_interactive(NULL,
 				   patch_interactive ? "--patch" : NULL,
 				   pathspec);
 }

 static int edit_patch(int argc, const char **argv, const char *prefix)
 {
 	char *file = xstrdup(git_path("ADD_EDIT.patch"));
 	const char *apply_argv[] = { "apply", "--recount", "--cached",
 		NULL, NULL };
 	struct child_process child;
 	struct rev_info rev;
 	int out;
 	struct stat st;

 	apply_argv[3] = file;

 	git_config(git_diff_basic_config, NULL); /* no "diff" UI options */

 	if (read_cache() < 0)
 		die ("Could not read the index");

 	init_revisions(&rev, prefix);
 	rev.diffopt.context = 7;

 	argc = setup_revisions(argc, argv, &rev, NULL);
 	rev.diffopt.output_format = DIFF_FORMAT_PATCH;
 	out = open(file, O_CREAT | O_WRONLY, 0644);
 	if (out < 0)
 		die ("Could not open '%s' for writing.", file);
 	rev.diffopt.file = xfdopen(out, "w");
 	rev.diffopt.close_file = 1;
 	if (run_diff_files(&rev, 0))
 		die ("Could not write patch");

 	launch_editor(file, NULL, NULL);

 	if (stat(file, &st))
 		die_errno("Could not stat '%s'", file);
 	if (!st.st_size)
 		die("Empty patch. Aborted.");

 	memset(&child, 0, sizeof(child));
 	child.git_cmd = 1;
 	child.argv = apply_argv;
 	if (run_command(&child))
 		die ("Could not apply '%s'", file);

 	unlink(file);
 	return 0;
 }

 static struct lock_file lock_file;

 static const char ignore_error[] =
 "The following paths are ignored by one of your .gitignore files:\n";

 static int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
 static int ignore_add_errors, addremove, intent_to_add, ignore_missing = 0;

 static struct option builtin_add_options[] = {
 	OPT__DRY_RUN(&show_only),
 	OPT__VERBOSE(&verbose),
 	OPT_GROUP(""),
 	OPT_BOOLEAN('i', "interactive", &add_interactive, "interactive picking"),
 	OPT_BOOLEAN('p', "patch", &patch_interactive, "interactive patching"),
 	OPT_BOOLEAN('e', "edit", &edit_interactive, "edit current diff and apply"),
 	OPT_BOOLEAN('f', "force", &ignored_too, "allow adding otherwise ignored files"),
 	OPT_BOOLEAN('u', "update", &take_worktree_changes, "update tracked files"),
 	OPT_BOOLEAN('N', "intent-to-add", &intent_to_add, "record only the fact that the path will be added later"),
 	OPT_BOOLEAN('A', "all", &addremove, "add all, noticing removal of tracked files"),
 	OPT_BOOLEAN( 0 , "refresh", &refresh_only, "don't add, only refresh the index"),
 	OPT_BOOLEAN( 0 , "ignore-errors", &ignore_add_errors, "just skip files which cannot be added because of errors"),
 	OPT_BOOLEAN( 0 , "ignore-missing", &ignore_missing, "check if - even missing - files are ignored in dry run"),
 	OPT_END(),
 };

 static int add_config(const char *var, const char *value, void *cb)
 {
 	if (!strcasecmp(var, "add.ignore-errors")) {
 		ignore_add_errors = git_config_bool(var, value);
 		return 0;
 	}
 	return git_default_config(var, value, cb);
 }

 static int add_files(struct dir_struct *dir, int flags)
 {
 	int i, exit_status = 0;

 	if (dir->ignored_nr) {
 		fprintf(stderr, ignore_error);
 		for (i = 0; i < dir->ignored_nr; i++)
 			fprintf(stderr, "%s\n", dir->ignored[i]->name);
 		fprintf(stderr, "Use -f if you really want to add them.\n");
 		die("no files added");
 	}

 	for (i = 0; i < dir->nr; i++)
 		if (add_file_to_cache(dir->entries[i]->name, flags)) {
 			if (!ignore_add_errors)
 				die("adding files failed");
 			exit_status = 1;
 		}
 	return exit_status;
 }

 int cmd_add(int argc, const char **argv, const char *prefix)
 {
 	int exit_status = 0;
 	int newfd;
 	const char **pathspec;
 	struct dir_struct dir;
 	int flags;
 	int add_new_files;
 	int require_pathspec;
 	char *seen = NULL;

 	git_config(add_config, NULL);

 	argc = parse_options(argc, argv, prefix, builtin_add_options,
 			  builtin_add_usage, PARSE_OPT_KEEP_ARGV0);
 	if (patch_interactive)
 		add_interactive = 1;
 	if (add_interactive)
 		exit(interactive_add(argc - 1, argv + 1, prefix));

 	if (edit_interactive)
 		return(edit_patch(argc, argv, prefix));
 	argc--;
 	argv++;

 	if (addremove && take_worktree_changes)
 		die("-A and -u are mutually incompatible");
 	if (!show_only && ignore_missing)
 		die("Option --ignore-missing can only be used together with --dry-run");
 	if ((addremove || take_worktree_changes) && !argc) {
 		static const char *here[2] = { ".", NULL };
 		argc = 1;
 		argv = here;
 	}

 	add_new_files = !take_worktree_changes && !refresh_only;
 	require_pathspec = !take_worktree_changes;

 	newfd = hold_locked_index(&lock_file, 1);

 	flags = ((verbose ? ADD_CACHE_VERBOSE : 0) |
 		 (show_only ? ADD_CACHE_PRETEND : 0) |
 		 (intent_to_add ? ADD_CACHE_INTENT : 0) |
 		 (ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) |
 		 (!(addremove || take_worktree_changes)
 		  ? ADD_CACHE_IGNORE_REMOVAL : 0));

 	if (require_pathspec && argc == 0) {
 		fprintf(stderr, "Nothing specified, nothing added.\n");
 		fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 		return 0;
 	}
 	pathspec = validate_pathspec(argc, argv, prefix);

 	if (read_cache() < 0)
 		die("index file corrupt");
 	treat_gitlinks(pathspec);

 	if (add_new_files) {
 		int baselen;

 		/* Set up the default git porcelain excludes */
 		memset(&dir, 0, sizeof(dir));
 		if (!ignored_too) {
 			dir.flags |= DIR_COLLECT_IGNORED;
 			setup_standard_excludes(&dir);
 		}

 		/* This picks up the paths that are not tracked */
 		baselen = fill_directory(&dir, pathspec);
 		if (pathspec)
 			seen = prune_directory(&dir, pathspec, baselen);
 	}

 	if (refresh_only) {
 		refresh(verbose, pathspec);
 		goto finish;
 	}

 	if (pathspec) {
 		int i;
 		if (!seen)
 			seen = find_used_pathspec(pathspec);
 		for (i = 0; pathspec[i]; i++) {
 			if (!seen[i] && pathspec[i][0]
 			    && !file_exists(pathspec[i])) {
 				if (ignore_missing) {
 					if (excluded(&dir, pathspec[i], DT_UNKNOWN))
 						dir_add_ignored(&dir, pathspec[i], strlen(pathspec[i]));
 				} else
 					die("pathspec '%s' did not match any files",
 					    pathspec[i]);
 			}
 		}
 		free(seen);
 	}

 	exit_status |= add_files_to_cache(prefix, pathspec, flags);

 	if (add_new_files)
 		exit_status |= add_files(&dir, flags);

  finish:
 	if (active_cache_changed) {
 		if (write_cache(newfd, active_cache, active_nr) ||
 		    commit_locked_index(&lock_file))
 			die("Unable to write new index file");
 	}

 	return exit_status;
 }
	/*
	* "git add" builtin command
	*
	* Copyright (C) 2006 Linus Torvalds
	*/
	#include "cache.h"
	#include "builtin.h"
	#include "dir.h"
	#include "exec_cmd.h"
	#include "cache-tree.h"
	#include "run-command.h"
	#include "parse-options.h"
	#include "diff.h"
	#include "diffcore.h"
	#include "revision.h"

	static const char * const builtin_add_usage[] = {
	"git add [options] [--] <filepattern>...",
	NULL
	};
	static int patch_interactive, add_interactive, edit_interactive;
	static int take_worktree_changes;

	struct update_callback_data
	{
	int flags;
	int add_errors;
	};

	static void update_callback(struct diff_queue_struct *q,
	struct diff_options opt, void cbdata)
	{
	int i;
	struct update_callback_data *data = cbdata;

	for (i = 0; i < q->nr; i++) {
	struct diff_filepair *p = q->queue[i];
	const char *path = p->one->path;
	switch (p->status) {
	default:
	die("unexpected diff status %c", p->status);
	case DIFF_STATUS_UNMERGED:
	/*
	* ADD_CACHE_IGNORE_REMOVAL is unset if "git
	* add -u" is calling us, In such a case, a
	* missing work tree file needs to be removed
	* if there is an unmerged entry at stage #2,
	* but such a diff record is followed by
	* another with DIFF_STATUS_DELETED (and if
	* there is no stage #2, we won't see DELETED
	* nor MODIFIED). We can simply continue
	* either way.
	*/
	if (!(data->flags & ADD_CACHE_IGNORE_REMOVAL))
	continue;
	/*
	* Otherwise, it is "git add path" is asking
	* to explicitly add it; we fall through. A
	* missing work tree file is an error and is
	* caught by add_file_to_index() in such a
	* case.
	*/
	case DIFF_STATUS_MODIFIED:
	case DIFF_STATUS_TYPE_CHANGED:
	if (add_file_to_index(&the_index, path, data->flags)) {
	if (!(data->flags & ADD_CACHE_IGNORE_ERRORS))
	die("updating files failed");
	data->add_errors++;
	}
	break;
	case DIFF_STATUS_DELETED:
	if (data->flags & ADD_CACHE_IGNORE_REMOVAL)
	break;
	if (!(data->flags & ADD_CACHE_PRETEND))
	remove_file_from_index(&the_index, path);
	if (data->flags & (ADD_CACHE_PRETEND\|ADD_CACHE_VERBOSE))
	printf("remove '%s'\n", path);
	break;
	}
	}
	}

	int add_files_to_cache(const char prefix, const char *pathspec, int flags)
	{
	struct update_callback_data data;
	struct rev_info rev;
	init_revisions(&rev, prefix);
	setup_revisions(0, NULL, &rev, NULL);
	rev.prune_data = pathspec;
	rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
	rev.diffopt.format_callback = update_callback;
	data.flags = flags;
	data.add_errors = 0;
	rev.diffopt.format_callback_data = &data;
	run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
	return !!data.add_errors;
	}

	static void fill_pathspec_matches(const char *pathspec, char seen, int specs)
	{
	int num_unmatched = 0, i;

	/*
	* Since we are walking the index as if we were walking the directory,
	* we have to mark the matched pathspec as seen; otherwise we will
	* mistakenly think that the user gave a pathspec that did not match
	* anything.
	*/
	for (i = 0; i < specs; i++)
	if (!seen[i])
	num_unmatched++;
	if (!num_unmatched)
	return;
	for (i = 0; i < active_nr; i++) {
	struct cache_entry *ce = active_cache[i];
	match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen);
	}
	}

	static char find_used_pathspec(const char *pathspec)
	{
	char *seen;
	int i;

	for (i = 0; pathspec[i]; i++)
	; /* just counting */
	seen = xcalloc(i, 1);
	fill_pathspec_matches(pathspec, seen, i);
	return seen;
	}

	static char prune_directory(struct dir_struct dir, const char **pathspec, int prefix)
	{
	char *seen;
	int i, specs;
	struct dir_entry src, dst;

	for (specs = 0; pathspec[specs]; specs++)
	/* nothing */;
	seen = xcalloc(specs, 1);

	src = dst = dir->entries;
	i = dir->nr;
	while (--i >= 0) {
	struct dir_entry entry = src++;
	if (match_pathspec(pathspec, entry->name, entry->len,
	prefix, seen))
	*dst++ = entry;
	}
	dir->nr = dst - dir->entries;
	fill_pathspec_matches(pathspec, seen, specs);
	return seen;
	}

	static void treat_gitlinks(const char **pathspec)
	{
	int i;

	if (!pathspec \|\| !*pathspec)
	return;

	for (i = 0; i < active_nr; i++) {
	struct cache_entry *ce = active_cache[i];
	if (S_ISGITLINK(ce->ce_mode)) {
	int len = ce_namelen(ce), j;
	for (j = 0; pathspec[j]; j++) {
	int len2 = strlen(pathspec[j]);
	if (len2 <= len \|\| pathspec[j][len] != '/' \|\|
	memcmp(ce->name, pathspec[j], len))
	continue;
	if (len2 == len + 1)
	/* strip trailing slash */
	pathspec[j] = xstrndup(ce->name, len);
	else
	die ("Path '%s' is in submodule '%.*s'",
	pathspec[j], len, ce->name);
	}
	}
	}
	}

	static void refresh(int verbose, const char **pathspec)
	{
	char *seen;
	int i, specs;

	for (specs = 0; pathspec[specs]; specs++)
	/* nothing */;
	seen = xcalloc(specs, 1);
	refresh_index(&the_index, verbose ? REFRESH_IN_PORCELAIN : REFRESH_QUIET,
	pathspec, seen, "Unstaged changes after refreshing the index:");
	for (i = 0; i < specs; i++) {
	if (!seen[i])
	die("pathspec '%s' did not match any files", pathspec[i]);
	}
	free(seen);
	}

	static const char validate_pathspec(int argc, const char argv, const char *prefix)
	{
	const char **pathspec = get_pathspec(prefix, argv);

	if (pathspec) {
	const char **p;
	for (p = pathspec; *p; p++) {
	if (has_symlink_leading_path(p, strlen(p))) {
	int len = prefix ? strlen(prefix) : 0;
	die("'%s' is beyond a symbolic link", *p + len);
	}
	}
	}

	return pathspec;
	}

	int run_add_interactive(const char revision, const char patch_mode,
	const char **pathspec)
	{
	int status, ac, pc = 0;
	const char **args;

	if (pathspec)
	while (pathspec[pc])
	pc++;

	args = xcalloc(sizeof(const char *), (pc + 5));
	ac = 0;
	args[ac++] = "add--interactive";
	if (patch_mode)
	args[ac++] = patch_mode;
	if (revision)
	args[ac++] = revision;
	args[ac++] = "--";
	if (pc) {
	memcpy(&(args[ac]), pathspec, sizeof(const char ) pc);
	ac += pc;
	}
	args[ac] = NULL;

	status = run_command_v_opt(args, RUN_GIT_CMD);
	free(args);
	return status;
	}

	int interactive_add(int argc, const char *argv, const char prefix)
	{
	const char **pathspec = NULL;

	if (argc) {
	pathspec = validate_pathspec(argc, argv, prefix);
	if (!pathspec)
	return -1;
	}

	return run_add_interactive(NULL,
	patch_interactive ? "--patch" : NULL,
	pathspec);
	}

	static int edit_patch(int argc, const char *argv, const char prefix)
	{
	char *file = xstrdup(git_path("ADD_EDIT.patch"));
	const char *apply_argv[] = { "apply", "--recount", "--cached",
	NULL, NULL };
	struct child_process child;
	struct rev_info rev;
	int out;
	struct stat st;

	apply_argv[3] = file;

	git_config(git_diff_basic_config, NULL); /* no "diff" UI options */

	if (read_cache() < 0)
	die ("Could not read the index");

	init_revisions(&rev, prefix);
	rev.diffopt.context = 7;

	argc = setup_revisions(argc, argv, &rev, NULL);
	rev.diffopt.output_format = DIFF_FORMAT_PATCH;
	out = open(file, O_CREAT \| O_WRONLY, 0644);
	if (out < 0)
	die ("Could not open '%s' for writing.", file);
	rev.diffopt.file = xfdopen(out, "w");
	rev.diffopt.close_file = 1;
	if (run_diff_files(&rev, 0))
	die ("Could not write patch");

	launch_editor(file, NULL, NULL);

	if (stat(file, &st))
	die_errno("Could not stat '%s'", file);
	if (!st.st_size)
	die("Empty patch. Aborted.");

	memset(&child, 0, sizeof(child));
	child.git_cmd = 1;
	child.argv = apply_argv;
	if (run_command(&child))
	die ("Could not apply '%s'", file);

	unlink(file);
	return 0;
	}

	static struct lock_file lock_file;

	static const char ignore_error[] =
	"The following paths are ignored by one of your .gitignore files:\n";

	static int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
	static int ignore_add_errors, addremove, intent_to_add, ignore_missing = 0;

	static struct option builtin_add_options[] = {
	OPT__DRY_RUN(&show_only),
	OPT__VERBOSE(&verbose),
	OPT_GROUP(""),
	OPT_BOOLEAN('i', "interactive", &add_interactive, "interactive picking"),
	OPT_BOOLEAN('p', "patch", &patch_interactive, "interactive patching"),
	OPT_BOOLEAN('e', "edit", &edit_interactive, "edit current diff and apply"),
	OPT_BOOLEAN('f', "force", &ignored_too, "allow adding otherwise ignored files"),
	OPT_BOOLEAN('u', "update", &take_worktree_changes, "update tracked files"),
	OPT_BOOLEAN('N', "intent-to-add", &intent_to_add, "record only the fact that the path will be added later"),
	OPT_BOOLEAN('A', "all", &addremove, "add all, noticing removal of tracked files"),
	OPT_BOOLEAN( 0 , "refresh", &refresh_only, "don't add, only refresh the index"),
	OPT_BOOLEAN( 0 , "ignore-errors", &ignore_add_errors, "just skip files which cannot be added because of errors"),
	OPT_BOOLEAN( 0 , "ignore-missing", &ignore_missing, "check if - even missing - files are ignored in dry run"),
	OPT_END(),
	};

	static int add_config(const char var, const char value, void *cb)
	{
	if (!strcasecmp(var, "add.ignore-errors")) {
	ignore_add_errors = git_config_bool(var, value);
	return 0;
	}
	return git_default_config(var, value, cb);
	}

	static int add_files(struct dir_struct *dir, int flags)
	{
	int i, exit_status = 0;

	if (dir->ignored_nr) {
	fprintf(stderr, ignore_error);
	for (i = 0; i < dir->ignored_nr; i++)
	fprintf(stderr, "%s\n", dir->ignored[i]->name);
	fprintf(stderr, "Use -f if you really want to add them.\n");
	die("no files added");
	}

	for (i = 0; i < dir->nr; i++)
	if (add_file_to_cache(dir->entries[i]->name, flags)) {
	if (!ignore_add_errors)
	die("adding files failed");
	exit_status = 1;
	}
	return exit_status;
	}

	int cmd_add(int argc, const char *argv, const char prefix)
	{
	int exit_status = 0;
	int newfd;
	const char **pathspec;
	struct dir_struct dir;
	int flags;
	int add_new_files;
	int require_pathspec;
	char *seen = NULL;

	git_config(add_config, NULL);

	argc = parse_options(argc, argv, prefix, builtin_add_options,
	builtin_add_usage, PARSE_OPT_KEEP_ARGV0);
	if (patch_interactive)
	add_interactive = 1;
	if (add_interactive)
	exit(interactive_add(argc - 1, argv + 1, prefix));

	if (edit_interactive)
	return(edit_patch(argc, argv, prefix));
	argc--;
	argv++;

	if (addremove && take_worktree_changes)
	die("-A and -u are mutually incompatible");
	if (!show_only && ignore_missing)
	die("Option --ignore-missing can only be used together with --dry-run");
	if ((addremove \|\| take_worktree_changes) && !argc) {
	static const char *here[2] = { ".", NULL };
	argc = 1;
	argv = here;
	}

	add_new_files = !take_worktree_changes && !refresh_only;
	require_pathspec = !take_worktree_changes;

	newfd = hold_locked_index(&lock_file, 1);

	flags = ((verbose ? ADD_CACHE_VERBOSE : 0) \|
	(show_only ? ADD_CACHE_PRETEND : 0) \|
	(intent_to_add ? ADD_CACHE_INTENT : 0) \|
	(ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) \|
	(!(addremove \|\| take_worktree_changes)
	? ADD_CACHE_IGNORE_REMOVAL : 0));

	if (require_pathspec && argc == 0) {
	fprintf(stderr, "Nothing specified, nothing added.\n");
	fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
	return 0;
	}
	pathspec = validate_pathspec(argc, argv, prefix);

	if (read_cache() < 0)
	die("index file corrupt");
	treat_gitlinks(pathspec);

	if (add_new_files) {
	int baselen;

	/* Set up the default git porcelain excludes */
	memset(&dir, 0, sizeof(dir));
	if (!ignored_too) {
	dir.flags \|= DIR_COLLECT_IGNORED;
	setup_standard_excludes(&dir);
	}

	/* This picks up the paths that are not tracked */
	baselen = fill_directory(&dir, pathspec);
	if (pathspec)
	seen = prune_directory(&dir, pathspec, baselen);
	}

	if (refresh_only) {
	refresh(verbose, pathspec);
	goto finish;
	}

	if (pathspec) {
	int i;
	if (!seen)
	seen = find_used_pathspec(pathspec);
	for (i = 0; pathspec[i]; i++) {
	if (!seen[i] && pathspec[i][0]
	&& !file_exists(pathspec[i])) {
	if (ignore_missing) {
	if (excluded(&dir, pathspec[i], DT_UNKNOWN))
	dir_add_ignored(&dir, pathspec[i], strlen(pathspec[i]));
	} else
	die("pathspec '%s' did not match any files",
	pathspec[i]);
	}
	}
	free(seen);
	}

	exit_status \|= add_files_to_cache(prefix, pathspec, flags);

	if (add_new_files)
	exit_status \|= add_files(&dir, flags);

	finish:
	if (active_cache_changed) {
	if (write_cache(newfd, active_cache, active_nr) \|\|
	commit_locked_index(&lock_file))
	die("Unable to write new index file");
	}

	return exit_status;
	}