From d410c9d4bca26fdb9781aebe06c3f64d9899f321 Mon Sep 17 00:00:00 2001
From: kkmuffme <11071985+kkmuffme@users.noreply.github.com>
Date: Tue, 15 Nov 2022 10:39:52 +0100
Subject: [PATCH 1/2] improve cache flush debug info and code if cache disabled

---
 .../Internal/Analyzer/ProjectAnalyzer.php     | 27 ++++++++++++-------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/src/Psalm/Internal/Analyzer/ProjectAnalyzer.php b/src/Psalm/Internal/Analyzer/ProjectAnalyzer.php
index 2e1bc2867aa..bd5e6737e92 100644
--- a/src/Psalm/Internal/Analyzer/ProjectAnalyzer.php
+++ b/src/Psalm/Internal/Analyzer/ProjectAnalyzer.php
@@ -348,15 +348,22 @@ public function __construct(
 
     private function clearCacheDirectoryIfConfigOrComposerLockfileChanged(): void
     {
+        $cache_directory = $this->config->getCacheDirectory();
+        if ($cache_directory === null) {
+            return;
+        }
+
         if ($this->project_cache_provider
             && $this->project_cache_provider->hasLockfileChanged()
         ) {
-            $this->progress->debug(
-                'Composer lockfile change detected, clearing cache' . "\n"
-            );
+            // we only clear the cache if it actually exists
+            // if it's not populated yet, we don't clear anything but populate the cache instead
+            clearstatcache(true, $cache_directory);
+            if (is_dir($cache_directory)) {
+                $this->progress->debug(
+                    'Composer lockfile change detected, clearing cache directory ' . $cache_directory . "\n"
+                );
 
-            $cache_directory = $this->config->getCacheDirectory();
-            if ($cache_directory !== null) {
                 Config::removeCacheDirectory($cache_directory);
             }
 
@@ -368,12 +375,12 @@ private function clearCacheDirectoryIfConfigOrComposerLockfileChanged(): void
         } elseif ($this->file_reference_provider->cache
             && $this->file_reference_provider->cache->hasConfigChanged()
         ) {
-            $this->progress->debug(
-                'Config change detected, clearing cache' . "\n"
-            );
+            clearstatcache(true, $cache_directory);
+            if (is_dir($cache_directory)) {
+                $this->progress->debug(
+                    'Config change detected, clearing cache directory ' . $cache_directory . "\n"
+                );
 
-            $cache_directory = $this->config->getCacheDirectory();
-            if ($cache_directory !== null) {
                 Config::removeCacheDirectory($cache_directory);
             }
 

From 17c246b82730d73099f077d4c2fd77df9f7f6bbb Mon Sep 17 00:00:00 2001
From: kkmuffme <11071985+kkmuffme@users.noreply.github.com>
Date: Tue, 15 Nov 2022 10:51:44 +0100
Subject: [PATCH 2/2] code style

---
 src/Psalm/Internal/Analyzer/ProjectAnalyzer.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Psalm/Internal/Analyzer/ProjectAnalyzer.php b/src/Psalm/Internal/Analyzer/ProjectAnalyzer.php
index bd5e6737e92..2bc864fce0d 100644
--- a/src/Psalm/Internal/Analyzer/ProjectAnalyzer.php
+++ b/src/Psalm/Internal/Analyzer/ProjectAnalyzer.php
@@ -64,6 +64,7 @@
 use function array_map;
 use function array_merge;
 use function array_shift;
+use function clearstatcache;
 use function cli_set_process_title;
 use function count;
 use function defined;