feat(compiler): introduce compile/transform/bundle diagnostics (#256)

packages/lwc-compiler/package.json

@@ -3,19 +3,21 @@
   "version": "0.20.0",
   "description": "LWC compiler",
   "main": "dist/commonjs/index.js",
+  "typings": "dist/types/index.d.ts",
   "author": "",
   "license": "ISC",
   "scripts": {
     "clean": "rm -rf dist",
-    "build": "echo 'Building compiler...' && DIR=`pwd` && cd ../../ && tsc -p $DIR/tsconfig.json",
-    "build:all": "",
-    "build:umd": "webpack --progress",
+    "build": "yarn compile && yarn update:version",
+    "compile": "echo 'Building compiler...' && DIR=`pwd` && cd ../../ && tsc -p $DIR/tsconfig.json",
+    "update:version": "node ./scripts/update-compiler-version.js",
     "test": "DIR=`pwd` && cd ../../ && jest $DIR"
   },
   "dependencies": {
     "@babel/core": "7.0.0-beta.40",
     "@babel/plugin-proposal-class-properties": "7.0.0-beta.40",
     "@babel/plugin-proposal-object-rest-spread": "7.0.0-beta.40",
+    "@types/chokidar": "^1.7.5",
     "babel-plugin-transform-lwc-class": "0.20.0",
     "babel-preset-compat": "0.17.40",
     "babel-preset-minify": "0.4.0-alpha.caaefb4c",
@@ -25,10 +27,12 @@
     "postcss": "~6.0.19",
     "postcss-plugin-lwc": "0.20.0",
     "postcss-selector-parser": "^3.1.1",
-    "rollup": "~0.56.2",
+    "rollup": "~0.56.5",
     "rollup-plugin-replace": "^2.0.0"
   },
   "devDependencies": {
+    "@types/babel-core": "^6.25.3",
+    "magic-string": "^0.22.4",
     "string-replace-webpack-plugin": "0.1.3",
     "webpack": "^3.11.0"
   }

packages/lwc-compiler/scripts/update-compiler-version.js

@@ -0,0 +1,34 @@
+const path = require("path");
+const replace = require("rollup-plugin-replace");
+const { rollup } = require("rollup");
+const { version } = require("../package.json");
+
+async function updateVersion(version) {
+    const sourcePath = path.resolve("dist/commonjs/index.js");
+
+    const result = await rollup({
+        input: sourcePath,
+        plugins: [
+            replace({
+                __VERSION__: version
+            })
+        ]
+    });
+
+    await result.write({
+        file: sourcePath,
+        format: "cjs",
+        sourcemap: false, // keep typescript generated map to stay consistent with the rest of the files.
+    });
+
+    console.log("Compiler version: ", version);
+}
+
+if (!version || typeof version !== "string") {
+    throw new Error(
+        "Failed to update compiler version. Expected version value as a string, received: " +
+            version
+    );
+}
+
+updateVersion(version);