Simplify path to wp-config.php and ensure writable for E2E tests

Author: westonruter

tools/local-env/scripts/install.js

@@ -6,14 +6,18 @@ const wait_on = require( 'wait-on' );
 const { execSync } = require( 'child_process' );
 const { readFileSync, writeFileSync } = require( 'fs' );
 const local_env_utils = require( './utils' );
+const fs = require('fs');
 
 dotenvExpand.expand( dotenv.config() );
 
 // Determine if a non-default database authentication plugin needs to be used.
 local_env_utils.determine_auth_option();
 
 // Create wp-config.php.
-wp_cli( `config create --dbname=wordpress_develop --dbuser=root --dbpass=password --dbhost=mysql --force --config-file=${process.env.LOCAL_DIR}/../wp-config.php` );
+wp_cli( `config create --dbname=wordpress_develop --dbuser=root --dbpass=password --dbhost=mysql --force --config-file="wp-config.php"` );
+
+// Make sure wp-config.php is writable for the sake of E2E tests.
+fs.chmodSync( 'wp-config.php', 0o666 );
 
 // Add the debug settings to wp-config.php.
 // Windows requires this to be done as an additional step, rather than using the --extra-php option in the previous step.