WIP: V4 prelude

.editorconfig

@@ -7,6 +7,7 @@ indent_style = space
 indent_size = 2
 trim_trailing_whitespace = true
 insert_final_newline = true
+quote_type = single
 
 [*.{js,jsx,ts,tsx,html,css,styl,ss,ess}]
 indent_style = tab

build/build-prelude-paths.js

@@ -0,0 +1,70 @@
+'use strict';
+
+const
+	ts = require('typescript'),
+	fs = require('fs'),
+	glob = require('glob');
+
+const primitiveTypes = ['Number', 'Array', 'Date', 'Object', 'String', 'RegExp', 'Function'];
+const formatPath = (fullPath) => {
+	const path = fullPath.replace(/.*\/src\//, '');
+
+	if (path.endsWith('/index.ts')) {
+		return path.replace('/index.ts', '');
+	}
+
+	return path.replace('.ts', '');
+};
+
+function extractPreludeInfo() {
+	const
+		preludeFiles = glob.sync('src/core/prelude/**/*.ts'),
+		preludeProgram = ts.createProgram(preludeFiles, require('../tsconfig.json')),
+		source = preludeProgram.getSourceFiles();
+
+	const result = {};
+
+	function transformer(ctx) {
+		return (sourceFile) => {
+			function visitor(node) {
+				if (ts.isVariableDeclaration(node) && node.initializer) {
+					const
+						{initializer, name} = node,
+						invokedExpression = ts.getInvokedExpression(initializer),
+						exportedSymbol = name && name.escapedText;
+
+					if (invokedExpression && invokedExpression.escapedText === 'extend') {
+						const
+							[{expression, escapedText}, {text: methodName}] = initializer.arguments,
+							parentType = expression && expression.escapedText || escapedText;
+
+						if (!result[parentType]) {
+							result[parentType] = {};
+						}
+
+						if (primitiveTypes.includes(parentType)) {
+							result[parentType][methodName] = {
+								path: formatPath(sourceFile.path),
+								name: exportedSymbol
+							};
+					}
+				}
+			}
+
+				return ts.visitEachChild(node, visitor, ctx);
+			}
+
+			return ts.visitEachChild(sourceFile, visitor, ctx);
+		};
+	}
+
+	ts.transform(source, [transformer]);
+
+	return result;
+}
+
+function savePreludeInformation(preludeInfo) {
+	fs.writeFileSync('./lib/prelude-paths.json', JSON.stringify(preludeInfo, null, 2));
+}
+
+savePreludeInformation(extractPreludeInfo());