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dir: introduce readdir_skip_dot_and_dotdot() helper

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Many places in the code were doing
    while ((d = readdir(dir)) != NULL) {
        if (is_dot_or_dotdot(d->d_name))
            continue;
        ...process d...
    }
Introduce a readdir_skip_dot_and_dotdot() helper to make that a one-liner:
    while ((d = readdir_skip_dot_and_dotdot(dir)) != NULL) {
        ...process d...
    }

This helper particularly simplifies checks for empty directories.

Also use this helper in read_cached_dir() so that our statistics are
consistent across platforms.  (In other words, read_cached_dir() should
have been using is_dot_or_dotdot() and skipping such entries, but did
not and left it to treat_path() to detect and mark such entries as
path_none.)

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren
2021-05-12 17:28:22 +00:00
committed by Junio C Hamano
parent 4e689d8171
commit b548f0f156
11 changed files with 31 additions and 45 deletions
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4
rerere.c
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@@ -1190,13 +1190,11 @@ void rerere_gc(struct repository *r, struct string_list *rr)
if (!dir)
die_errno(_("unable to open rr-cache directory"));
/* Collect stale conflict IDs ... */
while ((e = readdir(dir))) {
while ((e = readdir_skip_dot_and_dotdot(dir))) {
struct rerere_dir *rr_dir;
struct rerere_id id;
int now_empty;
if (is_dot_or_dotdot(e->d_name))
continue;
if (!is_rr_cache_dirname(e->d_name))
continue; /* or should we remove e->d_name? */