Convert the postinstall script to .js for windows support

.gitignore

@@ -8,6 +8,7 @@ package-lock.json
 /output/
 *.d.ts
 *.js
+!/scripts/*.js
 
 # TypeScript
 !/typings/**/*.d.ts

.vscode/settings.json

@@ -1,14 +1,14 @@
 // Place your settings in this file to overwrite default and user settings.
 {
   "files.exclude": {
-    "**/*.js": true,
     "**/*.js.map": true,
     "**/.DS_Store": true,
     "**/.git": true,
     "**/.hg": true,
     "**/.svn": true,
     "**/CVS": true,
     "{src,test}/**/*.d.ts": true,
+    "{src,test}/**/*.js": true,
     "node_modules/": true,
     "output/": true
   }

package.json

@@ -26,7 +26,7 @@
     "dev": "./scripts/dev.sh",
     "fix:style": "./scripts/fix:style.sh",
     "greenkeeper:lockfile": "./scripts/greenkeeper:lockfile.sh",
-    "postinstall": "./scripts/postinstall.sh",
+    "postinstall": "node ./scripts/postinstall.js",
     "release": "./scripts/release.sh",
     "test": "./scripts/test.sh",
     "test:compile": "./scripts/test:compile.sh",
@@ -48,6 +48,7 @@
     "greenkeeper-lockfile": "^1.7.2",
     "jest": "^20.0.4",
     "jest-junit": "^2.1.0",
+    "rimraf": "^2.6.1",
     "typescript": "^2.4.2",
     "typescript-eslint-parser": "eslint/typescript-eslint-parser#ts-2.4"
   }

scripts/postinstall.js

@@ -0,0 +1,58 @@
+#!/usr/bin/env node
+/* eslint-disable */
+var childProcess = require('child_process');
+var fs = require('fs');
+var path = require('path');
+
+var node_modules = path.resolve(__dirname, '..', 'node_modules');
+var temp_modules = node_modules + '.tmp';
+// We set an environment flag to ensure that this script doesn't loop.
+var compiling_var = 'compiling:' + process.env.npm_package_name;
+
+// When installing directly from GitHub, we get the TypeScript source, but none
+// of the compiled JavaScript.
+function isCompiled() {
+  // It will be.
+  if (process.env[compiling_var]) return true;
+
+  try {
+    return !!require.resolve('.');
+  } catch (error) {
+    return false;
+  }
+}
+
+function isDirectory() {
+  var fullPath = path.join.apply(path, arguments);
+  try {
+    return fs.statSync(fullPath).isDirectory();
+  } catch (error) {
+    return false;
+  }
+}
+
+// When installing directly from GitHub, we get the source, but none of the
+// compiled JavaScript.
+if (isCompiled()) return;
+
+// Install our dev dependencies (aka TypeScript) into a sandbox, so that we can
+// compile our code.
+if (isDirectory(node_modules)) {
+  fs.renameSync(node_modules, temp_modules);
+}
+
+var runner = /yarn/i.test(process.env.npm_config_user_agent) ? 'yarn' : 'npm';
+
+process.env[compiling_var] = 'true';
+process.stdout.write('Compiling TypeScript sources… ');
+childProcess.execSync(runner + ' install');
+childProcess.execSync(runner + ' run compile');
+process.stdout.write('done\n');
+
+// Sneaky, but rimraf is included as a devDependency.
+require('rimraf').sync(node_modules);
+
+// Restore any production dependencies.
+if (isDirectory(temp_modules)) {
+  fs.renameSync(temp_modules, node_modules);
+}