untracked cache: use git_env_bool() not getenv() for customization

GIT_DISABLE_UNTRACKED_CACHE and GIT_TEST_UNTRACKED_CACHE are only
sensed for their presense by using getenv(); use git_env_bool()
instead so that GIT_DISABLE_UNTRACKED_CACHE=false would work as
naïvely expected.

Also rename GIT_TEST_UNTRACKED_CACHE to GIT_FORCE_UNTRACKED_CACHE
to express what it does more honestly.  Forcing its use may be one
useful thing to do while testing the feature, but testing does not
have to be the only use of the knob.

While at it, avoid repeated calls to git_env_bool() by capturing the
return value from the first call in a static variable.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/dir.c b/dir.c
index da93374f0c7b93a7c602203cb0cb58f5ffde24a1..d445d77e626e84a56d44c73f0cf4118fc4f19600 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -2164,8 +2164,13 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
                                                      const struct pathspec *pathspec)
 {
        struct untracked_cache_dir *root;
+       static int untracked_cache_disabled = -1;
 
-       if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))
+       if (!dir->untracked)
+               return NULL;
+       if (untracked_cache_disabled < 0)
+               untracked_cache_disabled = git_env_bool("GIT_DISABLE_UNTRACKED_CACHE", 0);
+       if (untracked_cache_disabled)
                return NULL;
 
        /*
@@ -2287,7 +2292,12 @@ int read_directory(struct dir_struct *dir, struct index_state *istate,
        }
 
        if (dir->untracked) {
+               static int force_untracked_cache = -1;
                static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);
+
+               if (force_untracked_cache < 0)
+                       force_untracked_cache =
+                               git_env_bool("GIT_FORCE_UNTRACKED_CACHE", 0);
                trace_printf_key(&trace_untracked_stats,
                                 "node creation: %u\n"
                                 "gitignore invalidation: %u\n"
@@ -2297,7 +2307,7 @@ int read_directory(struct dir_struct *dir, struct index_state *istate,
                                 dir->untracked->gitignore_invalidated,
                                 dir->untracked->dir_invalidated,
                                 dir->untracked->dir_opened);
-               if (getenv("GIT_TEST_UNTRACKED_CACHE") &&
+               if (force_untracked_cache &&
                        dir->untracked == istate->untracked &&
                    (dir->untracked->dir_opened ||
                     dir->untracked->gitignore_invalidated ||

diff --git a/t/t7063-status-untracked-cache.sh b/t/t7063-status-untracked-cache.sh
index 6ef520e8237dbad4365eab057149678ba1221dba..9cb16ca36dae7b1d188318e741fdd538e575ba4f 100755 (executable)
--- a/t/t7063-status-untracked-cache.sh
+++ b/t/t7063-status-untracked-cache.sh
@@ -14,8 +14,8 @@ test_description='test untracked cache'
 # See <20160803174522.5571-1-pclouds@gmail.com> if you want to know
 # more.
 
-GIT_TEST_UNTRACKED_CACHE=true
-export GIT_TEST_UNTRACKED_CACHE
+GIT_FORCE_UNTRACKED_CACHE=true
+export GIT_FORCE_UNTRACKED_CACHE
 
 sync_mtime () {
        find . -type d -ls >/dev/null