Nguyễn Thái Ngọc Duy <[email protected]> writes:
> diff --git a/Documentation/technical/api-setup.txt
> b/Documentation/technical/api-setup.txt
> index 4f63a04..59a947e 100644
> --- a/Documentation/technical/api-setup.txt
> +++ b/Documentation/technical/api-setup.txt
> @@ -8,6 +8,23 @@ Talk about
> * is_inside_git_dir()
> * is_inside_work_tree()
> * setup_work_tree()
> -* get_pathspec()
>
> (Dscho)
> +
> +Pathspec
> +========
asciidoc: ERROR: api-setup.txt: line 15: only book doctypes can
contain level 0 sections
Just demoting this to "--------" should be sufficient, I think.
> +
> +See glossary-context.txt for the syntax of pathspec. In memory, a
> +pathspec set is represented by "struct pathspec" and is prepared by
> +parse_pathspec(). This function takes several arguments:
> +
> +- magic_mask specifies what features that are NOT supported by the
> + following code. If a user attempts to use such a feature,
> + parse_pathspec() can reject it early.
> +
> +- flags specifies other things that the caller wants parse_pathspec to
> + perform.
> +
> +- prefix and args come from cmd_* functions
> +
> +get_pathspec() is obsolete and should never be used in new code.
> diff --git a/dir.c b/dir.c
> index 97ad45b..a442467 100644
> --- a/dir.c
> +++ b/dir.c
> @@ -338,7 +338,7 @@ int match_pathspec_depth(const struct pathspec *ps,
> /*
> * Return the length of the "simple" part of a path match limiter.
> */
> -static int simple_length(const char *match)
> +int simple_length(const char *match)
> {
> int len = -1;
>
> @@ -350,7 +350,7 @@ static int simple_length(const char *match)
> }
> }
>
> -static int no_wildcard(const char *string)
> +int no_wildcard(const char *string)
> {
> return string[simple_length(string)] == '\0';
> }
> diff --git a/dir.h b/dir.h
> index c3eb4b5..89427fd 100644
> --- a/dir.h
> +++ b/dir.h
> @@ -125,6 +125,8 @@ struct dir_struct {
> #define MATCHED_RECURSIVELY 1
> #define MATCHED_FNMATCH 2
> #define MATCHED_EXACTLY 3
> +extern int simple_length(const char *match);
> +extern int no_wildcard(const char *string);
> extern char *common_prefix(const char **pathspec);
> extern int match_pathspec(const char **pathspec, const char *name, int
> namelen, int prefix, char *seen);
> extern int match_pathspec_depth(const struct pathspec *pathspec,
> diff --git a/pathspec.c b/pathspec.c
> index ab53b8a..ebe9844 100644
> --- a/pathspec.c
> +++ b/pathspec.c
> @@ -103,10 +103,6 @@ void die_if_path_beyond_symlink(const char *path, const
> char *prefix)
> /*
> * Magic pathspec
> *
> - * NEEDSWORK: These need to be moved to dir.h or even to a new
> - * pathspec.h when we restructure get_pathspec() users to use the
> - * "struct pathspec" interface.
> - *
> * Possible future magic semantics include stuff like:
> *
> * { PATHSPEC_NOGLOB, '!', "noglob" },
> @@ -115,7 +111,6 @@ void die_if_path_beyond_symlink(const char *path, const
> char *prefix)
> * { PATHSPEC_REGEXP, '\0', "regexp" },
> *
> */
> -#define PATHSPEC_FROMTOP (1<<0)
>
> static struct pathspec_magic {
> unsigned bit;
> @@ -127,7 +122,7 @@ static struct pathspec_magic {
>
> /*
> * Take an element of a pathspec and check for magic signatures.
> - * Append the result to the prefix.
> + * 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.
> @@ -138,10 +133,15 @@ static struct pathspec_magic {
> * the prefix part must always match literally, and a single stupid
> * string cannot express such a case.
> */
> -static const char *prefix_pathspec(const char *prefix, int prefixlen, const
> char *elt)
> +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)
> {
> - unsigned magic = 0;
> + unsigned magic = 0, short_magic = 0;
> const char *copyfrom = elt;
> + char *match;
> int i;
>
> if (elt[0] != ':') {
> @@ -183,7 +183,7 @@ static const char *prefix_pathspec(const char *prefix,
> int prefixlen, const char
> break;
> for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
> if (pathspec_magic[i].mnemonic == ch) {
> - magic |= pathspec_magic[i].bit;
> + short_magic |= pathspec_magic[i].bit;
> break;
> }
> if (ARRAY_SIZE(pathspec_magic) <= i)
> @@ -194,15 +194,128 @@ static const char *prefix_pathspec(const char *prefix,
> int prefixlen, const char
> copyfrom++;
> }
>
> + magic |= short_magic;
> + *p_short_magic = short_magic;
> +
> if (magic & PATHSPEC_FROMTOP)
> - return xstrdup(copyfrom);
> + match = xstrdup(copyfrom);
> else
> - return prefix_path(prefix, prefixlen, copyfrom);
> + match = prefix_path(prefix, prefixlen, copyfrom);
> + *raw = item->match = match;
> + item->len = strlen(item->match);
> + if (limit_pathspec_to_literal())
> + item->nowildcard_len = item->len;
> + else
> + item->nowildcard_len = simple_length(item->match);
> + item->flags = 0;
> + if (item->nowildcard_len < item->len &&
> + item->match[item->nowildcard_len] == '*' &&
> + no_wildcard(item->match + item->nowildcard_len + 1))
> + item->flags |= PATHSPEC_ONESTAR;
> + 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 substitue "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() 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));
> +
> + /* No arguments, no prefix -> no pathspec */
> + if (!entry && !prefix)
> + return;
> +
> + /* No arguments with prefix -> prefix pathspec */
> + if (!entry) {
> + static const char *raw[2];
> +
> + pathspec->items = item = xmalloc(sizeof(*item));
> + memset(item, 0, sizeof(*item));
> + item->match = prefix;
> + item->nowildcard_len = item->len = strlen(prefix);
> + 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 (item[i].magic & magic_mask)
> + unsupported_magic(entry,
> + item[i].magic & magic_mask,
> + short_magic);
> + if (item[i].nowildcard_len < item[i].len)
> + pathspec->has_wildcard = 1;
> + pathspec->magic |= item[i].magic;
> + }
> +
> + 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_magic above.
> + * based interface - see pathspec.c:parse_pathspec().
> *
> * Arguments:
> * - prefix - a path relative to the root of the working tree
> @@ -221,32 +334,11 @@ static const char *prefix_pathspec(const char *prefix,
> int prefixlen, const char
> */
> const char **get_pathspec(const char *prefix, const char **pathspec)
> {
> - const char *entry = *pathspec;
> - const char **src, **dst;
> - int prefixlen;
> -
> - if (!prefix && !entry)
> - return NULL;
> -
> - if (!entry) {
> - static const char *spec[2];
> - spec[0] = prefix;
> - spec[1] = NULL;
> - return spec;
> - }
> -
> - /* Otherwise we have to re-write the entries.. */
> - src = pathspec;
> - dst = pathspec;
> - prefixlen = prefix ? strlen(prefix) : 0;
> - while (*src) {
> - *(dst++) = prefix_pathspec(prefix, prefixlen, *src);
> - src++;
> - }
> - *dst = NULL;
> - if (!*pathspec)
> - return NULL;
> - return pathspec;
> + struct pathspec ps;
> + parse_pathspec(&ps,
> + PATHSPEC_ALL_MAGIC & ~PATHSPEC_FROMTOP,
> + 0, prefix, pathspec);
> + return ps.raw;
> }
>
> void copy_pathspec(struct pathspec *dst, const struct pathspec *src)
> diff --git a/pathspec.h b/pathspec.h
> index a621676..937ec91 100644
> --- a/pathspec.h
> +++ b/pathspec.h
> @@ -1,6 +1,10 @@
> #ifndef PATHSPEC_H
> #define PATHSPEC_H
>
> +/* Pathspec magic */
> +#define PATHSPEC_FROMTOP (1<<0)
> +#define PATHSPEC_ALL_MAGIC PATHSPEC_FROMTOP
> +
> #define PATHSPEC_ONESTAR 1 /* the pathspec pattern sastisfies GFNM_ONESTAR
> */
>
> struct pathspec {
> @@ -8,9 +12,11 @@ struct pathspec {
> int nr;
> unsigned int has_wildcard:1;
> unsigned int recursive:1;
> + unsigned magic;
> int max_depth;
> struct pathspec_item {
> const char *match;
> + unsigned magic;
> int len;
> int nowildcard_len;
> int flags;
> @@ -18,6 +24,11 @@ struct pathspec {
> };
>
> extern int init_pathspec(struct pathspec *, const char **);
> +extern void parse_pathspec(struct pathspec *pathspec,
> + unsigned magic_mask,
> + unsigned flags,
> + const char *prefix,
> + const char **args);
> extern void copy_pathspec(struct pathspec *dst, const struct pathspec *src);
> extern void free_pathspec(struct pathspec *);
--
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