5 files changed, 196 insertions, 0 deletions
diff --git a/thirdparty/preact/config/codemod-const.js b/thirdparty/preact/config/codemod-const.js
new file mode 100644
index 000000000..4bffd9add
--- /dev/null
+++ b/thirdparty/preact/config/codemod-const.js
@@ -0,0 +1,39 @@
+/* eslint no-console:0 */
+
+/** Find constants (identified by ALL_CAPS_DECLARATIONS), and inline them globally.
+ *	This is safe because Preact *only* uses global constants.
+ */
+export default (file, api) => {
+	let j = api.jscodeshift,
+		code = j(file.source),
+		constants = {},
+		found = 0;
+
+	code.find(j.VariableDeclaration)
+		.filter( decl => {
+			for (let i=decl.value.declarations.length; i--; ) {
+				let node = decl.value.declarations[i],
+					name = node.id && node.id.name,
+					init = node.init;
+				if (name && init && name.match(/^[A-Z0-9_$]+$/g)) {
+					if (init.type==='Literal') {
+						console.log(`Inlining constant: ${name}=${init.raw}`);
+						found++;
+						constants[name] = init;
+						// remove declaration
+						decl.value.declarations.splice(i, 1);
+						// if it's the last, we'll remove the whole statement
+						return !decl.value.declarations.length;
+					}
+				}
+			}
+			return false;
+		})
+		.remove();
+
+	code.find(j.Identifier)
+		.filter( path => path.value.name && constants.hasOwnProperty(path.value.name) )
+		.replaceWith( path => (found++, constants[path.value.name]) );
+
+	return found ? code.toSource({ quote: 'single' }) : null;
+};
diff --git a/thirdparty/preact/config/codemod-strip-tdz.js b/thirdparty/preact/config/codemod-strip-tdz.js
new file mode 100644
index 000000000..a1f07fafe
--- /dev/null
+++ b/thirdparty/preact/config/codemod-strip-tdz.js
@@ -0,0 +1,56 @@
+/* eslint no-console:0 */
+
+
+// parent node types that we don't want to remove pointless initializations from (because it breaks hoisting)
+const BLOCKED = ['ForStatement', 'WhileStatement']; // 'IfStatement', 'SwitchStatement'
+
+/** Removes var initialization to `void 0`, which Babel adds for TDZ strictness. */
+export default (file, api) => {
+	let { jscodeshift } = api,
+		found = 0;
+
+	let code = jscodeshift(file.source)
+		.find(jscodeshift.VariableDeclaration)
+		.forEach(handleDeclaration);
+
+	function handleDeclaration(decl) {
+		let p = decl,
+			remove = true;
+
+		while ((p = p.parentPath)) {
+			if (~BLOCKED.indexOf(p.value.type)) {
+				remove = false;
+				break;
+			}
+		}
+
+		decl.value.declarations.filter(isPointless).forEach( node => {
+			if (remove===false) {
+				console.log(`> Skipping removal of undefined init for "${node.id.name}": within ${p.value.type}`);
+			}
+			else {
+				removeNodeInitialization(node);
+			}
+		});
+	}
+
+	function removeNodeInitialization(node) {
+		node.init = null;
+		found++;
+	}
+
+	function isPointless(node) {
+		let { init } = node;
+		if (init) {
+			if (init.type==='UnaryExpression' && init.operator==='void' && init.argument.value==0) {
+				return true;
+			}
+			if (init.type==='Identifier' && init.name==='undefined') {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	return found ? code.toSource({ quote: 'single' }) : null;
+};
diff --git a/thirdparty/preact/config/eslint-config.js b/thirdparty/preact/config/eslint-config.js
new file mode 100644
index 000000000..95ac48965
--- /dev/null
+++ b/thirdparty/preact/config/eslint-config.js
@@ -0,0 +1,66 @@
+module.exports = {
+	parser: 'babel-eslint',
+	extends: 'eslint:recommended',
+	plugins: [
+		'react'
+	],
+	env: {
+		browser: true,
+		mocha: true,
+		node: true,
+		es6: true
+	},
+	parserOptions: {
+		ecmaFeatures: {
+			modules: true,
+			jsx: true
+		}
+	},
+	globals: {
+		sinon: true,
+		expect: true
+	},
+	rules: {
+		'react/jsx-uses-react': 2,
+		'react/jsx-uses-vars': 2,
+		'no-unused-vars': [1, { varsIgnorePattern: '^h$' }],
+		'no-cond-assign': 1,
+		'no-empty': 0,
+		'no-console': 1,
+		semi: 2,
+		camelcase: 0,
+		'comma-style': 2,
+		'comma-dangle': [2, 'never'],
+		indent: [2, 'tab', {SwitchCase: 1}],
+		'no-mixed-spaces-and-tabs': [2, 'smart-tabs'],
+		'no-trailing-spaces': [2, { skipBlankLines: true }],
+		'max-nested-callbacks': [2, 3],
+		'no-eval': 2,
+		'no-implied-eval': 2,
+		'no-new-func': 2,
+		'guard-for-in': 0,
+		eqeqeq: 0,
+		'no-else-return': 2,
+		'no-redeclare': 2,
+		'no-dupe-keys': 2,
+		radix: 2,
+		strict: [2, 'never'],
+		'no-shadow': 0,
+		'callback-return': [1, ['callback', 'cb', 'next', 'done']],
+		'no-delete-var': 2,
+		'no-undef-init': 2,
+		'no-shadow-restricted-names': 2,
+		'handle-callback-err': 0,
+		'no-lonely-if': 2,
+		'keyword-spacing': 2,
+		'constructor-super': 2,
+		'no-this-before-super': 2,
+		'no-dupe-class-members': 2,
+		'no-const-assign': 2,
+		'prefer-spread': 2,
+		'no-useless-concat': 2,
+		'no-var': 2,
+		'object-shorthand': 2,
+		'prefer-arrow-callback': 2
+	}
+};
diff --git a/thirdparty/preact/config/rollup.config.aliases.js b/thirdparty/preact/config/rollup.config.aliases.js
new file mode 100644
index 000000000..e5c549fc3
--- /dev/null
+++ b/thirdparty/preact/config/rollup.config.aliases.js
@@ -0,0 +1,12 @@
+import memory from 'rollup-plugin-memory';
+import rollupConfig from './rollup.config';
+
+export default Object.assign({}, rollupConfig, {
+	plugins: [
+		memory({
+			path: 'src/preact',
+			contents: `import { h } from './preact';export * from './preact';export { h as createElement };`
+		}),
+		...rollupConfig.plugins.slice(1)
+	]
+});
diff --git a/thirdparty/preact/config/rollup.config.js b/thirdparty/preact/config/rollup.config.js
new file mode 100644
index 000000000..57f71e1e7
--- /dev/null
+++ b/thirdparty/preact/config/rollup.config.js
@@ -0,0 +1,23 @@
+import nodeResolve from 'rollup-plugin-node-resolve';
+import babel from 'rollup-plugin-babel';
+import memory from 'rollup-plugin-memory';
+
+export default {
+	exports: 'named',
+	useStrict: false,
+	plugins: [
+		memory({
+			path: 'src/preact',
+			contents: "export * from './preact';"
+		}),
+		nodeResolve({
+			main: true
+		}),
+		babel({
+			sourceMap: true,
+			loose: 'all',
+			blacklist: ['es6.tailCall'],
+			exclude: 'node_modules/**'
+		})
+	]
+};