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gitignore: lazily find dtype

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When we process "foo/" entries in gitignore files on a system
that does not have d_type member in "struct dirent", the earlier
implementation ran lstat(2) separately when matching with
entries that came from the command line, in-tree .gitignore
files, and $GIT_DIR/info/excludes file.

This optimizes it by delaying the lstat(2) call until it becomes
absolutely necessary.

The initial idea for this change was by Jeff King, but I
optimized it further to pass pointers to around.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2008-01-31 20:23:25 -08:00
parent d6b8fc303b
commit 6831a88ac0
4 changed files with 23 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
builtin-ls-files.c
View File

@ -238,8 +238,8 @@ static void show_files(struct dir_struct *dir, const char *prefix)
if (show_cached | show_stage) {
for (i = 0; i < active_nr; i++) {
struct cache_entry *ce = active_cache[i];
if (excluded(dir, ce->name, ce_to_dtype(ce)) !=
dir->show_ignored)
int dtype = ce_to_dtype(ce);
if (excluded(dir, ce->name, &dtype) != dir->show_ignored)
continue;
if (show_unmerged && !ce_stage(ce))
continue;
@ -253,8 +253,8 @@ static void show_files(struct dir_struct *dir, const char *prefix)
struct cache_entry *ce = active_cache[i];
struct stat st;
int err;
if (excluded(dir, ce->name, ce_to_dtype(ce)) !=
dir->show_ignored)
int dtype = ce_to_dtype(ce);
if (excluded(dir, ce->name, &dtype) != dir->show_ignored)
continue;
err = lstat(ce->name, &st);
if (show_deleted && err)

25
dir.c
View File

@ -17,6 +17,7 @@ struct path_simplify {
static int read_directory_recursive(struct dir_struct *dir,
const char *path, const char *base, int baselen,
int check_only, const struct path_simplify *simplify);
static int get_dtype(struct dirent *de, const char *path);
int common_prefix(const char **pathspec)
{
@ -277,7 +278,7 @@ static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
* Return 1 for exclude, 0 for include and -1 for undecided.
*/
static int excluded_1(const char *pathname,
int pathlen, const char *basename, int dtype,
int pathlen, const char *basename, int *dtype,
struct exclude_list *el)
{
int i;
@ -288,9 +289,12 @@ static int excluded_1(const char *pathname,
const char *exclude = x->pattern;
int to_exclude = x->to_exclude;
if ((x->flags & EXC_FLAG_MUSTBEDIR) &&
(dtype != DT_DIR))
continue;
if (x->flags & EXC_FLAG_MUSTBEDIR) {
if (*dtype == DT_UNKNOWN)
*dtype = get_dtype(NULL, pathname);
if (*dtype != DT_DIR)
continue;
}
if (x->flags & EXC_FLAG_NODIR) {
/* match basename */
@ -334,7 +338,7 @@ static int excluded_1(const char *pathname,
return -1; /* undecided */
}
int excluded(struct dir_struct *dir, const char *pathname, int dtype)
int excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
{
int pathlen = strlen(pathname);
int st;
@ -344,7 +348,7 @@ int excluded(struct dir_struct *dir, const char *pathname, int dtype)
prep_exclude(dir, pathname, basename-pathname);
for (st = EXC_CMDL; st <= EXC_FILE; st++) {
switch (excluded_1(pathname, pathlen, basename,
dtype, &dir->exclude_list[st])) {
dtype_p, &dir->exclude_list[st])) {
case 0:
return 0;
case 1:
@ -529,7 +533,7 @@ static int in_pathspec(const char *path, int len, const struct path_simplify *si
static int get_dtype(struct dirent *de, const char *path)
{
int dtype = DTYPE(de);
int dtype = de ? DTYPE(de) : DT_UNKNOWN;
struct stat st;
if (dtype != DT_UNKNOWN)
@ -581,8 +585,8 @@ static int read_directory_recursive(struct dir_struct *dir, const char *path, co
if (simplify_away(fullname, baselen + len, simplify))
continue;
dtype = get_dtype(de, fullname);
exclude = excluded(dir, fullname, dtype);
dtype = DTYPE(de);
exclude = excluded(dir, fullname, &dtype);
if (exclude && dir->collect_ignored
&& in_pathspec(fullname, baselen + len, simplify))
dir_add_ignored(dir, fullname, baselen + len);
@ -594,6 +598,9 @@ static int read_directory_recursive(struct dir_struct *dir, const char *path, co
if (exclude && !dir->show_ignored)
continue;
if (dtype == DT_UNKNOWN)
dtype = get_dtype(de, fullname);
/*
* Do we want to see just the ignored files?
* We still need to recurse into directories,

2
dir.h
View File

@ -68,7 +68,7 @@ extern int match_pathspec(const char **pathspec, const char *name, int namelen,
extern int read_directory(struct dir_struct *, const char *path, const char *base, int baselen, const char **pathspec);
extern int excluded(struct dir_struct *, const char *, int);
extern int excluded(struct dir_struct *, const char *, int *);
extern void add_excludes_from_file(struct dir_struct *, const char *fname);
extern void add_exclude(const char *string, const char *base,
int baselen, struct exclude_list *which);

3
unpack-trees.c
View File

@ -522,8 +522,9 @@ static void verify_absent(struct cache_entry *ce, const char *action,
if (!lstat(ce->name, &st)) {
int cnt;
int dtype = ce_to_dtype(ce);
if (o->dir && excluded(o->dir, ce->name, ce_to_dtype(ce)))
if (o->dir && excluded(o->dir, ce->name, &dtype))
/*
* ce->name is explicitly excluded, so it is Ok to
* overwrite it.