Allow tree-shaking to be disabled

bin/runRollup.js

@@ -82,12 +82,14 @@ var equivalents = {
 	format: 'format',
 	globals: 'globals',
 	id: 'moduleId',
+	indent: 'indent',
 	input: 'entry',
 	intro: 'intro',
 	name: 'moduleName',
 	output: 'dest',
 	outro: 'outro',
-	sourcemap: 'sourceMap'
+	sourcemap: 'sourceMap',
+	treeshake: 'treeshake'
 };
 
 function execute ( options, command ) {
@@ -113,12 +115,13 @@ function execute ( options, command ) {
 	options.onwarn = options.onwarn || log;
 
 	options.external = external;
-	options.indent = command.indent !== false;
 
 	options.noConflict = command.conflict === false;
+	delete command.conflict;
 
+	// Use any options passed through the CLI as overrides.
 	Object.keys( equivalents ).forEach( function ( cliOption ) {
-		if ( command[ cliOption ] ) {
+		if ( command.hasOwnProperty( cliOption ) ) {
 			options[ equivalents[ cliOption ] ] = command[ cliOption ];
 		}
 	});

src/Bundle.js

@@ -31,6 +31,8 @@ export default class Bundle {
 		this.entryId = null;
 		this.entryModule = null;
 
+		this.treeshake = options.treeshake !== false;
+
 		this.resolveId = first(
 			[ id => ~this.external.indexOf( id ) ? false : null ]
 				.concat( this.plugins.map( plugin => plugin.resolveId ).filter( Boolean ) )
@@ -102,7 +104,7 @@ export default class Bundle {
 					settled = true;
 
 					this.modules.forEach( module => {
-						if ( module.run() ) settled = false;
+						if ( module.run( this.treeshake ) ) settled = false;
 					});
 				}
 

src/Module.js

@@ -601,7 +601,23 @@ export default class Module {
 		return magicString.trim();
 	}
 
-	run () {
+	/**
+	 * Statically runs the module marking the top-level statements that must be
+	 * included for the module to execute successfully.
+	 *
+	 * @param {boolean} treeshake - if we should tree-shake the module
+	 * @return {boolean} marked - if any new statements were marked for inclusion
+	 */
+	run ( treeshake ) {
+		if ( !treeshake ) {
+			this.statements.forEach( statement => {
+				if ( statement.isImportDeclaration ) return;
+
+				statement.mark();
+			});
+			return false;
+		}
+
 		let marked = false;
 
 		this.statements.forEach( statement => {

src/rollup.js

@@ -26,6 +26,7 @@ const ALLOWED_KEYS = [
 	'outro',
 	'plugins',
 	'sourceMap',
+	'treeshake',
 	'useStrict'
 ];
 

test/test.js

@@ -76,7 +76,7 @@ describe( 'rollup', function () {
 			return rollup.rollup({ entry: 'x', plUgins: [] }).then( function () {
 				throw new Error( 'Missing expected error' );
 			}, function ( err ) {
-				assert.equal( 'Unexpected key \'plUgins\' found, expected one of: banner, dest, entry, exports, external, footer, format, globals, indent, intro, moduleId, moduleName, noConflict, onwarn, outro, plugins, sourceMap, useStrict', err.message );
+				assert.equal( err.message, 'Unexpected key \'plUgins\' found, expected one of: banner, dest, entry, exports, external, footer, format, globals, indent, intro, moduleId, moduleName, noConflict, onwarn, outro, plugins, sourceMap, treeshake, useStrict' );
 			});
 		});
 	});