Load fast-plist async. For #40147

src/vs/workbench/services/themes/electron-browser/colorThemeData.ts

@@ -14,7 +14,6 @@ import nls = require('vs/nls');
 import * as types from 'vs/base/common/types';
 import * as objects from 'vs/base/common/objects';
 
-import * as plist from 'fast-plist';
 import pfs = require('vs/base/node/pfs');
 
 import { Extensions, IColorRegistry, ColorIdentifier, editorBackground, editorForeground } from 'vs/platform/theme/common/colorRegistry';
@@ -289,25 +288,31 @@ function _loadColorThemeFromFile(themePath: string, resultRules: ITokenColorizat
 	}
 }
 
+let pListParser: Thenable<{ parse(content: string) }>;
+function getPListParser() {
+	return pListParser || import('fast-plist');
+}
+
 function _loadSyntaxTokensFromFile(themePath: string, resultRules: ITokenColorizationRule[], resultColors: IColorMap): TPromise<any> {
 	return pfs.readFile(themePath).then(content => {
-		try {
-			let contentValue = plist.parse(content.toString());
-			let settings: ITokenColorizationRule[] = contentValue.settings;
-			if (!Array.isArray(settings)) {
-				return TPromise.wrapError(new Error(nls.localize('error.plist.invalidformat', "Problem parsing tmTheme file: {0}. 'settings' is not array.")));
+		return getPListParser().then(parser => {
+			try {
+				let contentValue = parser.parse(content.toString());
+				let settings: ITokenColorizationRule[] = contentValue.settings;
+				if (!Array.isArray(settings)) {
+					return TPromise.wrapError(new Error(nls.localize('error.plist.invalidformat', "Problem parsing tmTheme file: {0}. 'settings' is not array.")));
+				}
+				convertSettings(settings, resultRules, resultColors);
+				return TPromise.as(null);
+			} catch (e) {
+				return TPromise.wrapError(new Error(nls.localize('error.cannotparse', "Problems parsing tmTheme file: {0}", e.message)));
 			}
-			convertSettings(settings, resultRules, resultColors);
-			return TPromise.as(null);
-		} catch (e) {
-			return TPromise.wrapError(new Error(nls.localize('error.cannotparse', "Problems parsing tmTheme file: {0}", e.message)));
-		}
+		});
 	}, error => {
 		return TPromise.wrapError(new Error(nls.localize('error.cannotload', "Problems loading tmTheme file {0}: {1}", themePath, error.message)));
 	});
 }
 
-
 function updateDefaultRuleSettings(defaultRule: ITokenColorizationRule, theme: ColorThemeData): ITokenColorizationRule {
 	let foreground = theme.getColor(editorForeground) || theme.getDefault(editorForeground);
 	let background = theme.getColor(editorBackground) || theme.getDefault(editorBackground);