Fix file locking of package installer // Issue #1594

platformio/managers/package.py

@@ -680,6 +680,11 @@ class BasePkgManager(PkgRepoMixin, PkgInstallerMixin):
                 silent=False,
                 after_update=False,
                 force=False):
+        pkg_dir = None
+        # interprocess lock
+        with LockFile(self.package_dir):
+            self.cache_reset()
+
             name, requirements, url = self.parse_pkg_uri(name, requirements)
             package_dir = self.get_package_dir(name, requirements, url)
 
@@ -708,11 +713,6 @@ class BasePkgManager(PkgRepoMixin, PkgInstallerMixin):
                         fg="yellow")
                 return package_dir
 
-        pkg_dir = None
-        # interprocess lock
-        with LockFile(self.package_dir):
-            self.cache_reset()
-
             if url:
                 pkg_dir = self._install_from_url(
                     name, url, requirements, track=True)