[thirdparty/git.git] / pathspec.c

#include "cache.h"
#include "dir.h"
#include "pathspec.h"

/*
 * Finds which of the given pathspecs match items in the index.
 *
 * For each pathspec, sets the corresponding entry in the seen[] array
 * (which should be specs items long, i.e. the same size as pathspec)
 * to the nature of the "closest" (i.e. most specific) match found for
 * that pathspec in the index, if it was a closer type of match than
 * the existing entry.  As an optimization, matching is skipped
 * altogether if seen[] already only contains non-zero entries.
 *
 * If seen[] has not already been written to, it may make sense
 * to use find_pathspecs_matching_against_index() instead.
 */
void add_pathspec_matches_against_index(const struct pathspec *pathspec,
					char *seen)
{
	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 < pathspec->nr; i++)
		if (!seen[i])
			num_unmatched++;
	if (!num_unmatched)
		return;
	for (i = 0; i < active_nr; i++) {
		const struct cache_entry *ce = active_cache[i];
		match_pathspec_depth(pathspec, ce->name, ce_namelen(ce), 0, seen);
	}
}

/*
 * Finds which of the given pathspecs match items in the index.
 *
 * This is a one-shot wrapper around add_pathspec_matches_against_index()
 * which allocates, populates, and returns a seen[] array indicating the
 * nature of the "closest" (i.e. most specific) matches which each of the
 * given pathspecs achieves against all items in the index.
 */
char *find_pathspecs_matching_against_index(const struct pathspec *pathspec)
{
	char *seen = xcalloc(pathspec->nr, 1);
	add_pathspec_matches_against_index(pathspec, seen);
	return seen;
}

/*
 * Magic pathspec
 *
 * Possible future magic semantics include stuff like:
 *
 *	{ PATHSPEC_RECURSIVE, '*', "recursive" },
 *	{ PATHSPEC_REGEXP, '\0', "regexp" },
 *
 */

static struct pathspec_magic {
	unsigned bit;
	char mnemonic; /* this cannot be ':'! */
	const char *name;
} pathspec_magic[] = {
	{ PATHSPEC_FROMTOP, '/', "top" },
	{ PATHSPEC_LITERAL,   0, "literal" },
	{ PATHSPEC_GLOB,   '\0', "glob" },
	{ PATHSPEC_ICASE,  '\0', "icase" },
};

/*
 * Take an element of a pathspec and check for magic signatures.
 * Append the result to the prefix. Return the magic bitmap.
 *
 * For now, we only parse the syntax and throw out anything other than
 * "top" magic.
 *
 * NEEDSWORK: This needs to be rewritten when we start migrating
 * get_pathspec() users to use the "struct pathspec" interface.  For
 * example, a pathspec element may be marked as case-insensitive, but
 * the prefix part must always match literally, and a single stupid
 * string cannot express such a case.
 */
static unsigned prefix_pathspec(struct pathspec_item *item,
				unsigned *p_short_magic,
				const char **raw, unsigned flags,
				const char *prefix, int prefixlen,
				const char *elt)
{
	static int literal_global = -1;
	static int glob_global = -1;
	static int noglob_global = -1;
	static int icase_global = -1;
	unsigned magic = 0, short_magic = 0, global_magic = 0;
	const char *copyfrom = elt, *long_magic_end = NULL;
	char *match;
	int i, pathspec_prefix = -1;

	if (literal_global < 0)
		literal_global = git_env_bool(GIT_LITERAL_PATHSPECS_ENVIRONMENT, 0);
	if (literal_global)
		global_magic |= PATHSPEC_LITERAL;

	if (glob_global < 0)
		glob_global = git_env_bool(GIT_GLOB_PATHSPECS_ENVIRONMENT, 0);
	if (glob_global)
		global_magic |= PATHSPEC_GLOB;

	if (noglob_global < 0)
		noglob_global = git_env_bool(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, 0);

	if (glob_global && noglob_global)
		die(_("global 'glob' and 'noglob' pathspec settings are incompatible"));


	if (icase_global < 0)
		icase_global = git_env_bool(GIT_ICASE_PATHSPECS_ENVIRONMENT, 0);
	if (icase_global)
		global_magic |= PATHSPEC_ICASE;

	if ((global_magic & PATHSPEC_LITERAL) &&
	    (global_magic & ~PATHSPEC_LITERAL))
		die(_("global 'literal' pathspec setting is incompatible "
		      "with all other global pathspec settings"));

	if (flags & PATHSPEC_LITERAL_PATH)
		global_magic = 0;

	if (elt[0] != ':' || literal_global ||
	    (flags & PATHSPEC_LITERAL_PATH)) {
		; /* nothing to do */
	} else if (elt[1] == '(') {
		/* longhand */
		const char *nextat;
		for (copyfrom = elt + 2;
		     *copyfrom && *copyfrom != ')';
		     copyfrom = nextat) {
			size_t len = strcspn(copyfrom, ",)");
			if (copyfrom[len] == ',')
				nextat = copyfrom + len + 1;
			else
				/* handle ')' and '\0' */
				nextat = copyfrom + len;
			if (!len)
				continue;
			for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
				if (strlen(pathspec_magic[i].name) == len &&
				    !strncmp(pathspec_magic[i].name, copyfrom, len)) {
					magic |= pathspec_magic[i].bit;
					break;
				}
				if (!prefixcmp(copyfrom, "prefix:")) {
					char *endptr;
					pathspec_prefix = strtol(copyfrom + 7,
								 &endptr, 10);
					if (endptr - copyfrom != len)
						die(_("invalid parameter for pathspec magic 'prefix'"));
					/* "i" would be wrong, but it does not matter */
					break;
				}
			}
			if (ARRAY_SIZE(pathspec_magic) <= i)
				die(_("Invalid pathspec magic '%.*s' in '%s'"),
				    (int) len, copyfrom, elt);
		}
		if (*copyfrom != ')')
			die(_("Missing ')' at the end of pathspec magic in '%s'"), elt);
		long_magic_end = copyfrom;
		copyfrom++;
	} else {
		/* shorthand */
		for (copyfrom = elt + 1;
		     *copyfrom && *copyfrom != ':';
		     copyfrom++) {
			char ch = *copyfrom;

			if (!is_pathspec_magic(ch))
				break;
			for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
				if (pathspec_magic[i].mnemonic == ch) {
					short_magic |= pathspec_magic[i].bit;
					break;
				}
			if (ARRAY_SIZE(pathspec_magic) <= i)
				die(_("Unimplemented pathspec magic '%c' in '%s'"),
				    ch, elt);
		}
		if (*copyfrom == ':')
			copyfrom++;
	}

	magic |= short_magic;
	*p_short_magic = short_magic;

	/* --noglob-pathspec adds :(literal) _unless_ :(glob) is specified */
	if (noglob_global && !(magic & PATHSPEC_GLOB))
		global_magic |= PATHSPEC_LITERAL;

	/* --glob-pathspec is overridden by :(literal) */
	if ((global_magic & PATHSPEC_GLOB) && (magic & PATHSPEC_LITERAL))
		global_magic &= ~PATHSPEC_GLOB;

	magic |= global_magic;

	if (pathspec_prefix >= 0 &&
	    (prefixlen || (prefix && *prefix)))
		die("BUG: 'prefix' magic is supposed to be used at worktree's root");

	if ((magic & PATHSPEC_LITERAL) && (magic & PATHSPEC_GLOB))
		die(_("%s: 'literal' and 'glob' are incompatible"), elt);

	if (pathspec_prefix >= 0) {
		match = xstrdup(copyfrom);
		prefixlen = pathspec_prefix;
	} else if (magic & PATHSPEC_FROMTOP) {
		match = xstrdup(copyfrom);
		prefixlen = 0;
	} else {
		match = prefix_path_gently(prefix, prefixlen, &prefixlen, copyfrom);
		if (!match)
			die(_("%s: '%s' is outside repository"), elt, copyfrom);
	}
	*raw = item->match = match;
	/*
	 * Prefix the pathspec (keep all magic) and assign to
	 * original. Useful for passing to another command.
	 */
	if (flags & PATHSPEC_PREFIX_ORIGIN) {
		struct strbuf sb = STRBUF_INIT;
		const char *start = elt;
		if (prefixlen && !literal_global) {
			/* Preserve the actual prefix length of each pattern */
			if (short_magic)
				die("BUG: prefixing on short magic is not supported");
			else if (long_magic_end) {
				strbuf_add(&sb, start, long_magic_end - start);
				strbuf_addf(&sb, ",prefix:%d", prefixlen);
				start = long_magic_end;
			} else {
				if (*start == ':')
					start++;
				strbuf_addf(&sb, ":(prefix:%d)", prefixlen);
			}
		}
		strbuf_add(&sb, start, copyfrom - start);
		strbuf_addstr(&sb, match);
		item->original = strbuf_detach(&sb, NULL);
	} else
		item->original = elt;
	item->len = strlen(item->match);
	item->prefix = prefixlen;

	if ((flags & PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP) &&
	    (item->len >= 1 && item->match[item->len - 1] == '/') &&
	    (i = cache_name_pos(item->match, item->len - 1)) >= 0 &&
	    S_ISGITLINK(active_cache[i]->ce_mode)) {
		item->len--;
		match[item->len] = '\0';
	}

	if (flags & PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE)
		for (i = 0; i < active_nr; i++) {
			struct cache_entry *ce = active_cache[i];
			int ce_len = ce_namelen(ce);

			if (!S_ISGITLINK(ce->ce_mode))
				continue;

			if (item->len <= ce_len || match[ce_len] != '/' ||
			    memcmp(ce->name, match, ce_len))
				continue;
			if (item->len == ce_len + 1) {
				/* strip trailing slash */
				item->len--;
				match[item->len] = '\0';
			} else
				die (_("Pathspec '%s' is in submodule '%.*s'"),
				     elt, ce_len, ce->name);
		}

	if (magic & PATHSPEC_LITERAL)
		item->nowildcard_len = item->len;
	else {
		item->nowildcard_len = simple_length(item->match);
		if (item->nowildcard_len < prefixlen)
			item->nowildcard_len = prefixlen;
	}
	item->flags = 0;
	if (magic & PATHSPEC_GLOB) {
		/*
		 * FIXME: should we enable ONESTAR in _GLOB for
		 * pattern "* * / * . c"?
		 */
	} else {
		if (item->nowildcard_len < item->len &&
		    item->match[item->nowildcard_len] == '*' &&
		    no_wildcard(item->match + item->nowildcard_len + 1))
			item->flags |= PATHSPEC_ONESTAR;
	}

	/* sanity checks, pathspec matchers assume these are sane */
	assert(item->nowildcard_len <= item->len &&
	       item->prefix         <= item->len);
	return magic;
}

static int pathspec_item_cmp(const void *a_, const void *b_)
{
	struct pathspec_item *a, *b;

	a = (struct pathspec_item *)a_;
	b = (struct pathspec_item *)b_;
	return strcmp(a->match, b->match);
}

static void NORETURN unsupported_magic(const char *pattern,
				       unsigned magic,
				       unsigned short_magic)
{
	struct strbuf sb = STRBUF_INIT;
	int i, n;
	for (n = i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
		const struct pathspec_magic *m = pathspec_magic + i;
		if (!(magic & m->bit))
			continue;
		if (sb.len)
			strbuf_addstr(&sb, " ");
		if (short_magic & m->bit)
			strbuf_addf(&sb, "'%c'", m->mnemonic);
		else
			strbuf_addf(&sb, "'%s'", m->name);
		n++;
	}
	/*
	 * We may want to substitute "this command" with a command
	 * name. E.g. when add--interactive dies when running
	 * "checkout -p"
	 */
	die(_("%s: pathspec magic not supported by this command: %s"),
	    pattern, sb.buf);
}

/*
 * Given command line arguments and a prefix, convert the input to
 * pathspec. die() if any magic in magic_mask is used.
 */
void parse_pathspec(struct pathspec *pathspec,
		    unsigned magic_mask, unsigned flags,
		    const char *prefix, const char **argv)
{
	struct pathspec_item *item;
	const char *entry = argv ? *argv : NULL;
	int i, n, prefixlen;

	memset(pathspec, 0, sizeof(*pathspec));

	if (flags & PATHSPEC_MAXDEPTH_VALID)
		pathspec->magic |= PATHSPEC_MAXDEPTH;

	/* No arguments, no prefix -> no pathspec */
	if (!entry && !prefix)
		return;

	if ((flags & PATHSPEC_PREFER_CWD) &&
	    (flags & PATHSPEC_PREFER_FULL))
		die("BUG: PATHSPEC_PREFER_CWD and PATHSPEC_PREFER_FULL are incompatible");

	/* No arguments with prefix -> prefix pathspec */
	if (!entry) {
		static const char *raw[2];

		if (flags & PATHSPEC_PREFER_FULL)
			return;

		if (!(flags & PATHSPEC_PREFER_CWD))
			die("BUG: PATHSPEC_PREFER_CWD requires arguments");

		pathspec->items = item = xmalloc(sizeof(*item));
		memset(item, 0, sizeof(*item));
		item->match = prefix;
		item->original = prefix;
		item->nowildcard_len = item->len = strlen(prefix);
		item->prefix = item->len;
		raw[0] = prefix;
		raw[1] = NULL;
		pathspec->nr = 1;
		pathspec->_raw = raw;
		return;
	}

	n = 0;
	while (argv[n])
		n++;

	pathspec->nr = n;
	pathspec->items = item = xmalloc(sizeof(*item) * n);
	pathspec->_raw = argv;
	prefixlen = prefix ? strlen(prefix) : 0;

	for (i = 0; i < n; i++) {
		unsigned short_magic;
		entry = argv[i];

		item[i].magic = prefix_pathspec(item + i, &short_magic,
						argv + i, flags,
						prefix, prefixlen, entry);
		if ((flags & PATHSPEC_LITERAL_PATH) &&
		    !(magic_mask & PATHSPEC_LITERAL))
			item[i].magic |= PATHSPEC_LITERAL;
		if (item[i].magic & magic_mask)
			unsupported_magic(entry,
					  item[i].magic & magic_mask,
					  short_magic);

		if ((flags & PATHSPEC_SYMLINK_LEADING_PATH) &&
		    has_symlink_leading_path(item[i].match, item[i].len)) {
			die(_("pathspec '%s' is beyond a symbolic link"), entry);
		}

		if (item[i].nowildcard_len < item[i].len)
			pathspec->has_wildcard = 1;
		pathspec->magic |= item[i].magic;
	}


	if (pathspec->magic & PATHSPEC_MAXDEPTH) {
		if (flags & PATHSPEC_KEEP_ORDER)
			die("BUG: PATHSPEC_MAXDEPTH_VALID and PATHSPEC_KEEP_ORDER are incompatible");
		qsort(pathspec->items, pathspec->nr,
		      sizeof(struct pathspec_item), pathspec_item_cmp);
	}
}

/*
 * N.B. get_pathspec() is deprecated in favor of the "struct pathspec"
 * based interface - see pathspec.c:parse_pathspec().
 *
 * Arguments:
 *  - prefix - a path relative to the root of the working tree
 *  - pathspec - a list of paths underneath the prefix path
 *
 * Iterates over pathspec, prepending each path with prefix,
 * and return the resulting list.
 *
 * If pathspec is empty, return a singleton list containing prefix.
 *
 * If pathspec and prefix are both empty, return an empty list.
 *
 * This is typically used by built-in commands such as add.c, in order
 * to normalize argv arguments provided to the built-in into a list of
 * paths to process, all relative to the root of the working tree.
 */
const char **get_pathspec(const char *prefix, const char **pathspec)
{
	struct pathspec ps;
	parse_pathspec(&ps,
		       PATHSPEC_ALL_MAGIC &
		       ~(PATHSPEC_FROMTOP | PATHSPEC_LITERAL),
		       PATHSPEC_PREFER_CWD,
		       prefix, pathspec);
	return ps._raw;
}

void copy_pathspec(struct pathspec *dst, const struct pathspec *src)
{
	*dst = *src;
	dst->items = xmalloc(sizeof(struct pathspec_item) * dst->nr);
	memcpy(dst->items, src->items,
	       sizeof(struct pathspec_item) * dst->nr);
}

void free_pathspec(struct pathspec *pathspec)
{
	free(pathspec->items);
	pathspec->items = NULL;
}
Commit	Line	Data
6f525e71 AS	1	#include "cache.h"
	2	#include "dir.h"
	3	#include "pathspec.h"
	4
	5	/*
	6	* Finds which of the given pathspecs match items in the index.
	7	*
	8	* For each pathspec, sets the corresponding entry in the seen[] array
	9	* (which should be specs items long, i.e. the same size as pathspec)
	10	* to the nature of the "closest" (i.e. most specific) match found for
	11	* that pathspec in the index, if it was a closer type of match than
	12	* the existing entry. As an optimization, matching is skipped
	13	* altogether if seen[] already only contains non-zero entries.
	14	*
	15	* If seen[] has not already been written to, it may make sense
4b78d7bc	16	* to use find_pathspecs_matching_against_index() instead.
6f525e71	17	*/
84b8b5d1 NTND	18	void add_pathspec_matches_against_index(const struct pathspec *pathspec,
84b8b5d1 NTND	19	char *seen)
6f525e71 AS	20	{
	21	int num_unmatched = 0, i;
	22
	23	/*
	24	* Since we are walking the index as if we were walking the directory,
	25	* we have to mark the matched pathspec as seen; otherwise we will
	26	* mistakenly think that the user gave a pathspec that did not match
	27	* anything.
	28	*/
84b8b5d1	29	for (i = 0; i < pathspec->nr; i++)
6f525e71 AS	30	if (!seen[i])
	31	num_unmatched++;
	32	if (!num_unmatched)
	33	return;
	34	for (i = 0; i < active_nr; i++) {
9c5e6c80	35	const struct cache_entry *ce = active_cache[i];
84b8b5d1	36	match_pathspec_depth(pathspec, ce->name, ce_namelen(ce), 0, seen);
6f525e71 AS	37	}
	38	}
	39
	40	/*
	41	* Finds which of the given pathspecs match items in the index.
	42	*
4b78d7bc AS	43	* This is a one-shot wrapper around add_pathspec_matches_against_index()
	44	* which allocates, populates, and returns a seen[] array indicating the
	45	* nature of the "closest" (i.e. most specific) matches which each of the
	46	* given pathspecs achieves against all items in the index.
6f525e71	47	*/
84b8b5d1	48	char find_pathspecs_matching_against_index(const struct pathspec pathspec)
6f525e71	49	{
84b8b5d1 NTND	50	char *seen = xcalloc(pathspec->nr, 1);
84b8b5d1 NTND	51	add_pathspec_matches_against_index(pathspec, seen);
6f525e71 AS	52	return seen;
6f525e71 AS	53	}
9d67b61f AS	54
9d67b61f AS	55	/*
64acde94 NTND	56	* Magic pathspec
64acde94 NTND	57	*
64acde94 NTND	58	* Possible future magic semantics include stuff like:
64acde94 NTND	59	*
64acde94 NTND	60	* { PATHSPEC_RECURSIVE, '*', "recursive" },
	61	* { PATHSPEC_REGEXP, '\0', "regexp" },
	62	*
	63	*/
64acde94 NTND	64
	65	static struct pathspec_magic {
	66	unsigned bit;
	67	char mnemonic; /* this cannot be ':'! */
	68	const char *name;
	69	} pathspec_magic[] = {
	70	{ PATHSPEC_FROMTOP, '/', "top" },
5c6933d2	71	{ PATHSPEC_LITERAL, 0, "literal" },
bd30c2e4	72	{ PATHSPEC_GLOB, '\0', "glob" },
93d93537	73	{ PATHSPEC_ICASE, '\0', "icase" },
64acde94 NTND	74	};
	75
	76	/*
	77	* Take an element of a pathspec and check for magic signatures.
87323bda	78	* Append the result to the prefix. Return the magic bitmap.
64acde94 NTND	79	*
	80	* For now, we only parse the syntax and throw out anything other than
	81	* "top" magic.
	82	*
	83	* NEEDSWORK: This needs to be rewritten when we start migrating
	84	* get_pathspec() users to use the "struct pathspec" interface. For
	85	* example, a pathspec element may be marked as case-insensitive, but
	86	* the prefix part must always match literally, and a single stupid
	87	* string cannot express such a case.
9d67b61f	88	*/
87323bda NTND	89	static unsigned prefix_pathspec(struct pathspec_item *item,
	90	unsigned *p_short_magic,
	91	const char **raw, unsigned flags,
	92	const char *prefix, int prefixlen,
	93	const char *elt)
9d67b61f	94	{
341003e7	95	static int literal_global = -1;
bd30c2e4 NTND	96	static int glob_global = -1;
bd30c2e4 NTND	97	static int noglob_global = -1;
93d93537	98	static int icase_global = -1;
5c6933d2	99	unsigned magic = 0, short_magic = 0, global_magic = 0;
233c3e6c	100	const char copyfrom = elt, long_magic_end = NULL;
87323bda	101	char *match;
233c3e6c	102	int i, pathspec_prefix = -1;
64acde94	103
341003e7 NTND	104	if (literal_global < 0)
341003e7 NTND	105	literal_global = git_env_bool(GIT_LITERAL_PATHSPECS_ENVIRONMENT, 0);
5c6933d2 NTND	106	if (literal_global)
5c6933d2 NTND	107	global_magic \|= PATHSPEC_LITERAL;
341003e7	108
bd30c2e4 NTND	109	if (glob_global < 0)
	110	glob_global = git_env_bool(GIT_GLOB_PATHSPECS_ENVIRONMENT, 0);
	111	if (glob_global)
	112	global_magic \|= PATHSPEC_GLOB;
	113
	114	if (noglob_global < 0)
	115	noglob_global = git_env_bool(GIT_NOGLOB_PATHSPECS_ENVIRONMENT, 0);
	116
	117	if (glob_global && noglob_global)
	118	die(_("global 'glob' and 'noglob' pathspec settings are incompatible"));
	119
93d93537 NTND	120
	121	if (icase_global < 0)
	122	icase_global = git_env_bool(GIT_ICASE_PATHSPECS_ENVIRONMENT, 0);
	123	if (icase_global)
	124	global_magic \|= PATHSPEC_ICASE;
	125
bd30c2e4 NTND	126	if ((global_magic & PATHSPEC_LITERAL) &&
	127	(global_magic & ~PATHSPEC_LITERAL))
	128	die(_("global 'literal' pathspec setting is incompatible "
	129	"with all other global pathspec settings"));
	130
4a2d5ae2 NTND	131	if (flags & PATHSPEC_LITERAL_PATH)
	132	global_magic = 0;
	133
	134	if (elt[0] != ':' \|\| literal_global \|\|
	135	(flags & PATHSPEC_LITERAL_PATH)) {
64acde94 NTND	136	; /* nothing to do */
	137	} else if (elt[1] == '(') {
	138	/* longhand */
	139	const char *nextat;
	140	for (copyfrom = elt + 2;
	141	copyfrom && copyfrom != ')';
	142	copyfrom = nextat) {
	143	size_t len = strcspn(copyfrom, ",)");
	144	if (copyfrom[len] == ',')
	145	nextat = copyfrom + len + 1;
	146	else
	147	/* handle ')' and '\0' */
	148	nextat = copyfrom + len;
	149	if (!len)
9d67b61f	150	continue;
233c3e6c	151	for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
64acde94 NTND	152	if (strlen(pathspec_magic[i].name) == len &&
	153	!strncmp(pathspec_magic[i].name, copyfrom, len)) {
	154	magic \|= pathspec_magic[i].bit;
	155	break;
	156	}
233c3e6c NTND	157	if (!prefixcmp(copyfrom, "prefix:")) {
	158	char *endptr;
	159	pathspec_prefix = strtol(copyfrom + 7,
	160	&endptr, 10);
	161	if (endptr - copyfrom != len)
	162	die(_("invalid parameter for pathspec magic 'prefix'"));
	163	/* "i" would be wrong, but it does not matter */
	164	break;
	165	}
	166	}
64acde94	167	if (ARRAY_SIZE(pathspec_magic) <= i)
f01d9820	168	die(_("Invalid pathspec magic '%.*s' in '%s'"),
64acde94 NTND	169	(int) len, copyfrom, elt);
	170	}
	171	if (*copyfrom != ')')
f01d9820	172	die(_("Missing ')' at the end of pathspec magic in '%s'"), elt);
233c3e6c	173	long_magic_end = copyfrom;
64acde94 NTND	174	copyfrom++;
	175	} else {
	176	/* shorthand */
	177	for (copyfrom = elt + 1;
	178	copyfrom && copyfrom != ':';
	179	copyfrom++) {
	180	char ch = *copyfrom;
	181
	182	if (!is_pathspec_magic(ch))
	183	break;
	184	for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
	185	if (pathspec_magic[i].mnemonic == ch) {
87323bda	186	short_magic \|= pathspec_magic[i].bit;
64acde94 NTND	187	break;
	188	}
	189	if (ARRAY_SIZE(pathspec_magic) <= i)
f01d9820	190	die(_("Unimplemented pathspec magic '%c' in '%s'"),
64acde94 NTND	191	ch, elt);
	192	}
	193	if (*copyfrom == ':')
	194	copyfrom++;
	195	}
	196
87323bda NTND	197	magic \|= short_magic;
87323bda NTND	198	*p_short_magic = short_magic;
bd30c2e4	199
382d20e3	200	/* --noglob-pathspec adds :(literal) _unless_ :(glob) is specified */
bd30c2e4 NTND	201	if (noglob_global && !(magic & PATHSPEC_GLOB))
	202	global_magic \|= PATHSPEC_LITERAL;
	203
382d20e3	204	/* --glob-pathspec is overridden by :(literal) */
bd30c2e4 NTND	205	if ((global_magic & PATHSPEC_GLOB) && (magic & PATHSPEC_LITERAL))
	206	global_magic &= ~PATHSPEC_GLOB;
	207
5c6933d2	208	magic \|= global_magic;
87323bda	209
233c3e6c NTND	210	if (pathspec_prefix >= 0 &&
	211	(prefixlen \|\| (prefix && *prefix)))
	212	die("BUG: 'prefix' magic is supposed to be used at worktree's root");
	213
bd30c2e4 NTND	214	if ((magic & PATHSPEC_LITERAL) && (magic & PATHSPEC_GLOB))
	215	die(_("%s: 'literal' and 'glob' are incompatible"), elt);
	216
233c3e6c NTND	217	if (pathspec_prefix >= 0) {
	218	match = xstrdup(copyfrom);
	219	prefixlen = pathspec_prefix;
	220	} else if (magic & PATHSPEC_FROMTOP) {
87323bda	221	match = xstrdup(copyfrom);
645a29c4 NTND	222	prefixlen = 0;
	223	} else {
	224	match = prefix_path_gently(prefix, prefixlen, &prefixlen, copyfrom);
	225	if (!match)
	226	die(_("%s: '%s' is outside repository"), elt, copyfrom);
	227	}
87323bda	228	*raw = item->match = match;
dad2586a NTND	229	/*
	230	* Prefix the pathspec (keep all magic) and assign to
	231	* original. Useful for passing to another command.
	232	*/
	233	if (flags & PATHSPEC_PREFIX_ORIGIN) {
	234	struct strbuf sb = STRBUF_INIT;
233c3e6c	235	const char *start = elt;
341003e7	236	if (prefixlen && !literal_global) {
233c3e6c	237	/* Preserve the actual prefix length of each pattern */
bc341c8b NTND	238	if (short_magic)
	239	die("BUG: prefixing on short magic is not supported");
	240	else if (long_magic_end) {
233c3e6c NTND	241	strbuf_add(&sb, start, long_magic_end - start);
	242	strbuf_addf(&sb, ",prefix:%d", prefixlen);
	243	start = long_magic_end;
9d67b61f	244	} else {
233c3e6c NTND	245	if (*start == ':')
	246	start++;
	247	strbuf_addf(&sb, ":(prefix:%d)", prefixlen);
9d67b61f AS	248	}
9d67b61f AS	249	}
233c3e6c	250	strbuf_add(&sb, start, copyfrom - start);
dad2586a NTND	251	strbuf_addstr(&sb, match);
	252	item->original = strbuf_detach(&sb, NULL);
	253	} else
	254	item->original = elt;
87323bda	255	item->len = strlen(item->match);
645a29c4	256	item->prefix = prefixlen;
b69bb3fc NTND	257
	258	if ((flags & PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP) &&
	259	(item->len >= 1 && item->match[item->len - 1] == '/') &&
	260	(i = cache_name_pos(item->match, item->len - 1)) >= 0 &&
	261	S_ISGITLINK(active_cache[i]->ce_mode)) {
	262	item->len--;
	263	match[item->len] = '\0';
	264	}
	265
87450244 NTND	266	if (flags & PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE)
	267	for (i = 0; i < active_nr; i++) {
	268	struct cache_entry *ce = active_cache[i];
	269	int ce_len = ce_namelen(ce);
	270
	271	if (!S_ISGITLINK(ce->ce_mode))
	272	continue;
	273
	274	if (item->len <= ce_len \|\| match[ce_len] != '/' \|\|
	275	memcmp(ce->name, match, ce_len))
	276	continue;
	277	if (item->len == ce_len + 1) {
	278	/* strip trailing slash */
	279	item->len--;
	280	match[item->len] = '\0';
	281	} else
	282	die (_("Pathspec '%s' is in submodule '%.*s'"),
	283	elt, ce_len, ce->name);
	284	}
	285
5c6933d2	286	if (magic & PATHSPEC_LITERAL)
87323bda	287	item->nowildcard_len = item->len;
645a29c4	288	else {
87323bda	289	item->nowildcard_len = simple_length(item->match);
645a29c4 NTND	290	if (item->nowildcard_len < prefixlen)
	291	item->nowildcard_len = prefixlen;
	292	}
87323bda	293	item->flags = 0;
bd30c2e4 NTND	294	if (magic & PATHSPEC_GLOB) {
	295	/*
	296	* FIXME: should we enable ONESTAR in _GLOB for
	297	* pattern "* * / * . c"?
	298	*/
	299	} else {
	300	if (item->nowildcard_len < item->len &&
	301	item->match[item->nowildcard_len] == '*' &&
	302	no_wildcard(item->match + item->nowildcard_len + 1))
	303	item->flags \|= PATHSPEC_ONESTAR;
9d67b61f	304	}
645a29c4 NTND	305
	306	/* sanity checks, pathspec matchers assume these are sane */
	307	assert(item->nowildcard_len <= item->len &&
	308	item->prefix <= item->len);
87323bda NTND	309	return magic;
	310	}
	311
	312	static int pathspec_item_cmp(const void a_, const void b_)
	313	{
	314	struct pathspec_item a, b;
	315
	316	a = (struct pathspec_item *)a_;
	317	b = (struct pathspec_item *)b_;
	318	return strcmp(a->match, b->match);
	319	}
	320
	321	static void NORETURN unsupported_magic(const char *pattern,
	322	unsigned magic,
	323	unsigned short_magic)
	324	{
	325	struct strbuf sb = STRBUF_INIT;
	326	int i, n;
	327	for (n = i = 0; i < ARRAY_SIZE(pathspec_magic); i++) {
	328	const struct pathspec_magic *m = pathspec_magic + i;
	329	if (!(magic & m->bit))
	330	continue;
	331	if (sb.len)
	332	strbuf_addstr(&sb, " ");
	333	if (short_magic & m->bit)
	334	strbuf_addf(&sb, "'%c'", m->mnemonic);
	335	else
	336	strbuf_addf(&sb, "'%s'", m->name);
	337	n++;
	338	}
	339	/*
	340	* We may want to substitute "this command" with a command
	341	* name. E.g. when add--interactive dies when running
	342	* "checkout -p"
	343	*/
	344	die(_("%s: pathspec magic not supported by this command: %s"),
	345	pattern, sb.buf);
9d67b61f	346	}
512aaf94 AS	347
512aaf94 AS	348	/*
87323bda NTND	349	* Given command line arguments and a prefix, convert the input to
87323bda NTND	350	* pathspec. die() if any magic in magic_mask is used.
512aaf94	351	*/
87323bda NTND	352	void parse_pathspec(struct pathspec *pathspec,
	353	unsigned magic_mask, unsigned flags,
	354	const char prefix, const char *argv)
512aaf94	355	{
87323bda NTND	356	struct pathspec_item *item;
	357	const char entry = argv ? argv : NULL;
	358	int i, n, prefixlen;
	359
	360	memset(pathspec, 0, sizeof(*pathspec));
	361
6330a171 NTND	362	if (flags & PATHSPEC_MAXDEPTH_VALID)
	363	pathspec->magic \|= PATHSPEC_MAXDEPTH;
	364
87323bda NTND	365	/* No arguments, no prefix -> no pathspec */
	366	if (!entry && !prefix)
	367	return;
	368
fc12261f NTND	369	if ((flags & PATHSPEC_PREFER_CWD) &&
	370	(flags & PATHSPEC_PREFER_FULL))
	371	die("BUG: PATHSPEC_PREFER_CWD and PATHSPEC_PREFER_FULL are incompatible");
	372
87323bda NTND	373	/* No arguments with prefix -> prefix pathspec */
	374	if (!entry) {
	375	static const char *raw[2];
	376
fc12261f NTND	377	if (flags & PATHSPEC_PREFER_FULL)
	378	return;
	379
	380	if (!(flags & PATHSPEC_PREFER_CWD))
	381	die("BUG: PATHSPEC_PREFER_CWD requires arguments");
	382
87323bda NTND	383	pathspec->items = item = xmalloc(sizeof(*item));
	384	memset(item, 0, sizeof(*item));
	385	item->match = prefix;
d2ce1331	386	item->original = prefix;
87323bda	387	item->nowildcard_len = item->len = strlen(prefix);
645a29c4	388	item->prefix = item->len;
87323bda NTND	389	raw[0] = prefix;
	390	raw[1] = NULL;
	391	pathspec->nr = 1;
b3920bbd	392	pathspec->_raw = raw;
87323bda	393	return;
512aaf94	394	}
87323bda NTND	395
	396	n = 0;
	397	while (argv[n])
	398	n++;
	399
	400	pathspec->nr = n;
	401	pathspec->items = item = xmalloc(sizeof(item) n);
b3920bbd	402	pathspec->_raw = argv;
87323bda NTND	403	prefixlen = prefix ? strlen(prefix) : 0;
	404
	405	for (i = 0; i < n; i++) {
	406	unsigned short_magic;
	407	entry = argv[i];
	408
	409	item[i].magic = prefix_pathspec(item + i, &short_magic,
	410	argv + i, flags,
	411	prefix, prefixlen, entry);
4a2d5ae2 NTND	412	if ((flags & PATHSPEC_LITERAL_PATH) &&
	413	!(magic_mask & PATHSPEC_LITERAL))
	414	item[i].magic \|= PATHSPEC_LITERAL;
87323bda NTND	415	if (item[i].magic & magic_mask)
	416	unsupported_magic(entry,
	417	item[i].magic & magic_mask,
	418	short_magic);
87450244 NTND	419
	420	if ((flags & PATHSPEC_SYMLINK_LEADING_PATH) &&
	421	has_symlink_leading_path(item[i].match, item[i].len)) {
	422	die(_("pathspec '%s' is beyond a symbolic link"), entry);
	423	}
	424
87323bda NTND	425	if (item[i].nowildcard_len < item[i].len)
	426	pathspec->has_wildcard = 1;
	427	pathspec->magic \|= item[i].magic;
	428	}
	429
931eab64 NTND	430
	431	if (pathspec->magic & PATHSPEC_MAXDEPTH) {
	432	if (flags & PATHSPEC_KEEP_ORDER)
	433	die("BUG: PATHSPEC_MAXDEPTH_VALID and PATHSPEC_KEEP_ORDER are incompatible");
6330a171 NTND	434	qsort(pathspec->items, pathspec->nr,
6330a171 NTND	435	sizeof(struct pathspec_item), pathspec_item_cmp);
931eab64	436	}
64acde94 NTND	437	}
	438
	439	/*
	440	* N.B. get_pathspec() is deprecated in favor of the "struct pathspec"
87323bda	441	* based interface - see pathspec.c:parse_pathspec().
64acde94 NTND	442	*
	443	* Arguments:
	444	* - prefix - a path relative to the root of the working tree
	445	* - pathspec - a list of paths underneath the prefix path
	446	*
	447	* Iterates over pathspec, prepending each path with prefix,
	448	* and return the resulting list.
	449	*
	450	* If pathspec is empty, return a singleton list containing prefix.
	451	*
	452	* If pathspec and prefix are both empty, return an empty list.
	453	*
	454	* This is typically used by built-in commands such as add.c, in order
	455	* to normalize argv arguments provided to the built-in into a list of
	456	* paths to process, all relative to the root of the working tree.
	457	*/
	458	const char *get_pathspec(const char prefix, const char **pathspec)
	459	{
87323bda NTND	460	struct pathspec ps;
87323bda NTND	461	parse_pathspec(&ps,
5c6933d2 NTND	462	PATHSPEC_ALL_MAGIC &
5c6933d2 NTND	463	~(PATHSPEC_FROMTOP \| PATHSPEC_LITERAL),
fc12261f NTND	464	PATHSPEC_PREFER_CWD,
fc12261f NTND	465	prefix, pathspec);
b3920bbd	466	return ps._raw;
64acde94	467	}
e4d92cdc NTND	468
	469	void copy_pathspec(struct pathspec dst, const struct pathspec src)
	470	{
	471	dst = src;
	472	dst->items = xmalloc(sizeof(struct pathspec_item) * dst->nr);
	473	memcpy(dst->items, src->items,
	474	sizeof(struct pathspec_item) * dst->nr);
	475	}
9a087274 NTND	476
	477	void free_pathspec(struct pathspec *pathspec)
	478	{
	479	free(pathspec->items);
	480	pathspec->items = NULL;
512aaf94	481	}