Simplify Yarn installation by removing node_modules copy from previous_release

Author: antonmedv

contrib/yarn.php

@@ -18,14 +18,8 @@
     return which('yarn');
 });
 
-// In there is a {{previous_release}}, node_modules will be copied from it before installing deps with yarn.
 desc('Installs Yarn packages');
 task('yarn:install', function () {
-    if (has('previous_release')) {
-        if (test('[ -d {{previous_release}}/node_modules ]')) {
-            run('cp -R {{previous_release}}/node_modules {{release_path}}');
-        }
-    }
     run('cd {{release_path}} && {{bin/yarn}}');
 });
 

docs/contrib/yarn.md

@@ -42,15 +42,15 @@ return which('yarn');
 ## Tasks
 
 ### yarn\:install {#yarn-install}
-[Source](https://github.com/deployphp/deployer/blob/master/contrib/yarn.php#L23)
+[Source](https://github.com/deployphp/deployer/blob/master/contrib/yarn.php#L22)
 
 Installs Yarn packages.
 
-In there is a {{previous_release}}, node_modules will be copied from it before installing deps with yarn.
+
 
 
 ### yarn\:build {#yarn-build}
-[Source](https://github.com/deployphp/deployer/blob/master/contrib/yarn.php#L33)
+[Source](https://github.com/deployphp/deployer/blob/master/contrib/yarn.php#L27)
 
 Runs Yarn build.