parse_pathspec: add special flag for max_depth feature

match_pathspec_depth() and tree_entry_interesting() check max_depth
field in order to support "git grep --max-depth". The feature
activation is tied to "recursive" field, which led to some unwanted
activation, e.g. 5c8eeb8 (diff-index: enable recursive pathspec
matching in unpack_trees - 2012-01-15).

This patch decouples the activation from "recursive" field, puts it in
"magic" field instead. This makes sure that only "git grep" can
activate this feature. And because parse_pathspec knows when the
feature is not used, it does not need to sort pathspec (required for
max_depth to work correctly). A small win for non-grep cases.

Even though a new magic flag is introduced, no magic syntax is. The
magic can be only enabled by parse_pathspec() caller. We might someday
want to support ":(maxdepth:10)src." It all depends on actual use
cases.

max_depth feature cannot be enabled via init_pathspec() anymore. But
that's ok because init_pathspec() is on its way to /dev/null.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2013-07-14 15:35:32 +07:00 committed by Junio C Hamano
parent 0fdc2ae512
commit 6330a17199
7 changed files with 25 additions and 10 deletions

View File

@ -858,7 +858,8 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
}
parse_pathspec(&pathspec, 0,
PATHSPEC_PREFER_CWD,
PATHSPEC_PREFER_CWD |
(opt.max_depth != -1 ? PATHSPEC_MAXDEPTH_VALID : 0),
prefix, argv + i);
pathspec.max_depth = opt.max_depth;
pathspec.recursive = 1;

View File

@ -476,7 +476,6 @@ static int diff_cache(struct rev_info *revs,
opts.dst_index = NULL;
opts.pathspec = &revs->diffopt.pathspec;
opts.pathspec->recursive = 1;
opts.pathspec->max_depth = -1;
init_tree_desc(&t, tree->buffer, tree->size);
return unpack_trees(1, &t, &opts);

8
dir.c
View File

@ -341,7 +341,9 @@ int match_pathspec_depth(const struct pathspec *ps,
int i, retval = 0;
if (!ps->nr) {
if (!ps->recursive || ps->max_depth == -1)
if (!ps->recursive ||
!(ps->magic & PATHSPEC_MAXDEPTH) ||
ps->max_depth == -1)
return MATCHED_RECURSIVELY;
if (within_depth(name, namelen, 0, ps->max_depth))
@ -358,7 +360,9 @@ int match_pathspec_depth(const struct pathspec *ps,
if (seen && seen[i] == MATCHED_EXACTLY)
continue;
how = match_pathspec_item(ps->items+i, prefix, name, namelen);
if (ps->recursive && ps->max_depth != -1 &&
if (ps->recursive &&
(ps->magic & PATHSPEC_MAXDEPTH) &&
ps->max_depth != -1 &&
how && how != MATCHED_FNMATCH) {
int len = ps->items[i].len;
if (name[len] == '/')

View File

@ -267,6 +267,9 @@ void parse_pathspec(struct pathspec *pathspec,
memset(pathspec, 0, sizeof(*pathspec));
if (flags & PATHSPEC_MAXDEPTH_VALID)
pathspec->magic |= PATHSPEC_MAXDEPTH;
/* No arguments, no prefix -> no pathspec */
if (!entry && !prefix)
return;
@ -322,8 +325,9 @@ void parse_pathspec(struct pathspec *pathspec,
pathspec->magic |= item[i].magic;
}
qsort(pathspec->items, pathspec->nr,
sizeof(struct pathspec_item), pathspec_item_cmp);
if (pathspec->magic & PATHSPEC_MAXDEPTH)
qsort(pathspec->items, pathspec->nr,
sizeof(struct pathspec_item), pathspec_item_cmp);
}
/*

View File

@ -3,7 +3,10 @@
/* Pathspec magic */
#define PATHSPEC_FROMTOP (1<<0)
#define PATHSPEC_ALL_MAGIC PATHSPEC_FROMTOP
#define PATHSPEC_MAXDEPTH (1<<1)
#define PATHSPEC_ALL_MAGIC \
(PATHSPEC_FROMTOP | \
PATHSPEC_MAXDEPTH)
#define PATHSPEC_ONESTAR 1 /* the pathspec pattern sastisfies GFNM_ONESTAR */
@ -27,6 +30,7 @@ struct pathspec {
/* parse_pathspec flags */
#define PATHSPEC_PREFER_CWD (1<<0) /* No args means match cwd */
#define PATHSPEC_PREFER_FULL (1<<1) /* No args means match everything */
#define PATHSPEC_MAXDEPTH_VALID (1<<2) /* max_depth field is valid */
extern int init_pathspec(struct pathspec *, const char **);
extern void parse_pathspec(struct pathspec *pathspec,

View File

@ -138,7 +138,6 @@ int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
/* Enable recursion indefinitely */
opt->pathspec.recursive = DIFF_OPT_TST(opt, RECURSIVE);
opt->pathspec.max_depth = -1;
strbuf_init(&base, PATH_MAX);
strbuf_add(&base, base_str, baselen);

View File

@ -637,7 +637,9 @@ enum interesting tree_entry_interesting(const struct name_entry *entry,
entry_not_interesting : all_entries_not_interesting;
if (!ps->nr) {
if (!ps->recursive || ps->max_depth == -1)
if (!ps->recursive ||
!(ps->magic & PATHSPEC_MAXDEPTH) ||
ps->max_depth == -1)
return all_entries_interesting;
return within_depth(base->buf + base_offset, baselen,
!!S_ISDIR(entry->mode),
@ -658,7 +660,9 @@ enum interesting tree_entry_interesting(const struct name_entry *entry,
if (!match_dir_prefix(base_str, match, matchlen))
goto match_wildcards;
if (!ps->recursive || ps->max_depth == -1)
if (!ps->recursive ||
!(ps->magic & PATHSPEC_MAXDEPTH) ||
ps->max_depth == -1)
return all_entries_interesting;
return within_depth(base_str + matchlen + 1,