Dump a new autoloader when generating a Phar

Author: swissspidy

src/Context/FeatureContext.php

@@ -921,6 +921,23 @@ public function build_phar( $version = 'same' ) {
 			$make_phar_path = self::get_vendor_dir() . '/../utils/make-phar.php';
 		}
 
+		// Temporarily modify the Composer autoloader used within the Phar
+		// so that it doesn't clash if autoloading is already happening outside of it,
+		// for example when generating code coverage.
+		// This modifies composer.json.
+		$this->proc(
+			Utils\esc_cmd(
+				'composer config autoloader-suffix "WpCliTestsPhar" --working-dir=%s',
+				dirname( self::get_vendor_dir() )
+			)
+		)->run_check();
+		$this->proc(
+			Utils\esc_cmd(
+				'composer dump-autoload --working-dir=%s',
+				dirname( self::get_vendor_dir() )
+			)
+		)->run_check();
+
 		$this->proc(
 			Utils\esc_cmd(
 				'php -dphar.readonly=0 %1$s %2$s --version=%3$s && chmod +x %2$s',
@@ -929,6 +946,23 @@ public function build_phar( $version = 'same' ) {
 				$version
 			)
 		)->run_check();
+
+		// Revert the composer.json modification again
+		$this->proc(
+			Utils\esc_cmd(
+				'composer config --unset autoloader-suffix --working-dir=%s',
+				dirname( self::get_vendor_dir() )
+			)
+		)->run_check();
+		// Prevent Composer from simply reusing the existing suffix.
+		unlink( self::get_vendor_dir() . '/autoload.php' );
+		// Now it will use the content hash again.
+		$this->proc(
+			Utils\esc_cmd(
+				'composer dump-autoload -d %s',
+				dirname( self::get_vendor_dir() )
+			)
+		)->run_check();
 	}
 
 	public function download_phar( $version = 'same' ) {