[@osd/pm] Automate multi-target bootstrap and build

Also:
* build @osd/std for multiple targets
* convert @osd/i18n and @osd/ace from custom build scripts to targeted build process
* have @osd/optimizer ignore already built artifacts

Signed-off-by: Miki <miki@amazon.com>

CHANGELOG.md

@@ -48,6 +48,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Removes `minimatch` manual resolution ([#3019](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3019))
 - Upgrade `vega-lite` dependency from `4.17.0` to `^5.6.0` ([#3076](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3076)). Backwards-compatible version included in v2.5.0 release.
 - Bump `js-yaml` from `3.14.0` to `4.1.0` ([#3770](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3770))
+- [@osd/pm] Automate multi-target bootstrap and build ([#4650](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4650))
 - Update webpack environment targets ([#4649](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/4649))
 
 ### 🪛 Refactoring

packages/osd-ace/package.json

@@ -2,7 +2,9 @@
   "name": "@osd/ace",
   "version": "1.0.0",
   "private": true,
-  "main": "./target/index.js",
+  "browser": "./target/web/index.js",
+  "main": "./target/web/index.js",
+  "types": "./target/types/index.d.ts",
   "license": "Apache-2.0",
   "scripts": {
     "build": "../../scripts/use_node ./scripts/build.js",
@@ -17,5 +19,8 @@
     "raw-loader": "^4.0.2",
     "typescript": "4.0.2",
     "webpack": "npm:@amoo-miki/webpack@4.46.0-rc.2"
+  },
+  "@osd/pm": {
+    "web": true
   }
 }

packages/osd-ace/tsconfig.json

@@ -1,7 +1,7 @@
 {
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
-    "outDir": "./target",
+    "outDir": "./target/types",
     "declaration": true,
     "sourceMap": true,
     "types": [
@@ -11,5 +11,6 @@
   },
   "include": [
     "src/**/*"
-  ]
+  ],
+  "exclude": ["target"]
 }

packages/osd-dev-utils/src/simple_opensearch_dashboards_platform_plugin_discovery.ts

@@ -49,10 +49,10 @@ export function simpleOpenSearchDashboardsPlatformPluginDiscovery(
         (acc: string[], dir) => [
           ...acc,
           resolve(dir, '*/opensearch_dashboards.json'),
-          resolve(dir, '*/*/opensearch_dashboards.json'),
-          resolve(dir, '*/*/*/opensearch_dashboards.json'),
-          resolve(dir, '*/*/*/*/opensearch_dashboards.json'),
-          resolve(dir, '*/*/*/*/*/opensearch_dashboards.json'),
+          resolve(dir, '*/!(build)/opensearch_dashboards.json'),
+          resolve(dir, '*/!(build)/*/opensearch_dashboards.json'),
+          resolve(dir, '*/!(build)/*/*/opensearch_dashboards.json'),
+          resolve(dir, '*/!(build)/*/*/*/opensearch_dashboards.json'),
         ],
         []
       ),

packages/osd-i18n/package.json

@@ -6,11 +6,6 @@
   "version": "1.0.0",
   "license": "Apache-2.0",
   "private": true,
-  "scripts": {
-    "build": "../../scripts/use_node scripts/build",
-    "osd:bootstrap": "../../scripts/use_node scripts/build --source-maps",
-    "osd:watch": "../../scripts/use_node scripts/build --watch --source-maps"
-  },
   "devDependencies": {
     "@babel/cli": "^7.16.0",
     "@babel/core": "^7.16.5",
@@ -30,5 +25,9 @@
     "prop-types": "^15.7.2",
     "react": "^16.14.0",
     "react-intl": "^2.8.0"
+  },
+  "@osd/pm": {
+    "node": true,
+    "web": true
   }
 }

packages/osd-optimizer/src/worker/webpack.config.ts

@@ -207,7 +207,10 @@ export function getWebpackConfig(bundle: Bundle, bundleRefs: BundleRefs, worker:
           test: /\.(js|tsx?)$/,
           // vega-lite and some of its dependencies don't have es5 builds
           // so we need to build from source and transpile for webpack v4
-          exclude: /[\/\\]node_modules[\/\\](?!vega-(lite|label|functions)[\/\\])/,
+          exclude: [
+            /[\/\\]node_modules[\/\\](?!vega-(lite|label|functions)[\/\\])/,
+            /[\/\\]plugins[\/\\][^\/\\]+[\/\\]build[\/\\]/,
+          ],
           use: {
             loader: 'babel-loader',
             options: {

packages/osd-pm/README.md

@@ -183,6 +183,27 @@ The production build process relies on both the Grunt setup at the root of the
 OpenSearch Dashboards project and code in `@osd/pm`. The full process is described in
 `tasks/build/packages.js`.
 
+## Targeted builds
+
+Packages that are only compiled to CommonJS for consumption by server code, simply use a `tsconfig.json`
+that extends the `tsconfig.base.json` found at the root of the project. Similarly, packages that need to be
+compiled into ES modules, to be consumed in the browser and benefit from tree-shaking, use a`tsconfig.json`
+that extends the `tsconfig.browser.json` available at the root of the project. However, some packages need 
+to be compiled for consumption by both server code and the browser. This can be achieved by retaining the 
+`tsconfig.json` and adding the following block to the `package.json` of the package:
+```json
+"@osd/pm": {
+  "node": true,
+  "web": true
+}
+```
+With that, the relevant presets from `@osd/babel-preset` are applied to the code to produce bootstrap and 
+production build artifacts for the selected targets. It is acceptable to have only one target and that is
+the same as setting the appropriate `extends` in the `tsconfig.json`.
+
+Targeted builds call `babel` on the `src` folder and place artifacts into `target/node` and `target/web`
+folders after calling `tsc` in the package root to generate type definitions.
+
 ## Development
 
 This package is run from OpenSearch Dashboards root, using `yarn osd`. This will run the