Convert to monorepo (#831)

Currently, this repo and everything within it is published as a single
package. Using and maintaining this package, however, is problematic for
a few reasons:

1. Even if your library uses a couple of controllers, you must add the
   entire package and all of its dependencies to your library's
   dependency tree.
2. Because this package is used by many teams, when we make a new
   release, even if that release contains changes to one controller, we
   must coordinate with all teams to ensure that nothing has broken.

In addition, we want to be able to maintain our existing libraries more
easily, as right now it is difficult due to code being split across
multiple repositories.

To solve this problem, this commit converts the existing structure to a
monorepo structure, assigning controllers to packages which we can then
publish individually. (A full list of packages is contained in the
README.)

Along with a monorepo structure comes with a litany of changes:

* **TypeScript:** We have a "master" TypeScript config file, which is
  used by developers' code editors, but each package also has its own
  TypeScript config files. We are also using TypeScript project
  references, which allows us to inform TypeScript how all packages are
  connected to each other dependency-wise; this allows TypeScript to
  know which packages to build first.
* **Jest:** Each package has its own Jest config file, and we use Yarn
  workspaces to run the tests for each package in parallel.
* **ESLint:** We are able to lint the monorepo in the same way as we
  linted before.
* **TypeDoc:** We've added TypeDoc to each package and use Yarn
  workspaces to generate docs for each package in parallel.
* **Yarn:** A bunch of Yarn constraints have been added that verify that
  both the root package and each package has a well-formed `package.json`.
* **Other notes:**
  * Some packages depend on other packages within the monorepo. In other
    words, we might have an import for `@metamask/base-controller`
    within a controller file. Out of the box both TypeScript and Jest
    won't know what to do with this. Although Yarn will add a symlink in
    `node_modules` to the proper directory in `packages` for the package
    in question, TypeScript expects the code for the package to be
    compiled (i.e. for `dist/` to be populated), and Jest, as it has
    custom resolver logic, doesn't know what to do at all. To make this
    possible we have to add a custom mapping for both TypeScript and
    Jest that will tell them what to do when it sees a `@metamask/*`
    import.
  * The GitHub Action workflow files have been standardized against the
    newest changes to the module template.

Co-authored-by: Mark Stacey <markjstacey@gmail.com>
Co-authored-by: Maarten Zuidhoorn <maarten@zuidhoorn.com>

.github/workflows/lint-build-test.yml

@@ -1,14 +1,12 @@
 name: Lint, Build, and Test
 
 on:
-  push:
-    branches: [main]
-  pull_request:
+  workflow_call:
 
 jobs:
-  lint-build-test:
-    name: Lint, Build, and Test
-    runs-on: ubuntu-20.04
+  prepare:
+    name: Prepare
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         node-version: [14.x, 16.x]
@@ -18,31 +16,78 @@ jobs:
         uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}
-      - name: Get Yarn cache directory
-        run: echo "YARN_CACHE_DIR=$(yarn config get cacheFolder)" >> $GITHUB_OUTPUT
-        id: yarn-cache-dir
-      - name: Get Yarn version
-        run: echo "YARN_VERSION=$(yarn --version)" >> $GITHUB_OUTPUT
-        id: yarn-version
-      - name: Cache yarn dependencies
-        uses: actions/cache@v3
+          cache: yarn
+      - run: yarn --immutable
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    needs: prepare
+    strategy:
+      matrix:
+        node-version: [14.x, 16.x]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
         with:
-          path: ${{ steps.yarn-cache-dir.outputs.YARN_CACHE_DIR }}
-          key: yarn-cache-${{ runner.os }}-${{ steps.yarn-version.outputs.YARN_VERSION }}-${{ hashFiles('yarn.lock') }}
+          node-version: ${{ matrix.node-version }}
+          cache: yarn
       - run: yarn --immutable
       - run: yarn lint
-      - name: Validate RC changelog
-        if: ${{ startsWith(github.ref, 'release/') }}
-        run: yarn auto-changelog validate --rc
-      - name: Validate changelog
-        if: ${{ !startsWith(github.ref, 'release/') }}
-        run: yarn auto-changelog validate
+      - run: yarn changelog:validate
+      - name: Require clean working directory
+        shell: bash
+        run: |
+          if ! git diff --exit-code; then
+            echo "Working tree dirty at end of job"
+            exit 1
+          fi
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    needs: prepare
+    strategy:
+      matrix:
+        node-version: [14.x, 16.x]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: yarn
+      - run: yarn --immutable
       - run: yarn build
-      - run: yarn test --maxWorkers=1
-  all-jobs-pass:
-    name: All jobs pass
-    runs-on: ubuntu-20.04
-    needs:
-      - lint-build-test
+      - name: Require clean working directory
+        shell: bash
+        run: |
+          if ! git diff --exit-code; then
+            echo "Working tree dirty at end of job"
+            exit 1
+          fi
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    needs: prepare
+    strategy:
+      matrix:
+        node-version: [14.x, 16.x]
     steps:
-      - run: echo "Great success!"
+      - uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: yarn
+      - run: yarn --immutable
+      - run: yarn test
+      - name: Require clean working directory
+        shell: bash
+        run: |
+          if ! git diff --exit-code; then
+            echo "Working tree dirty at end of job"
+            exit 1
+          fi

.github/workflows/main.yml

@@ -0,0 +1,51 @@
+name: Main
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  check-workflows:
+    name: Check workflows
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Download actionlint
+        id: download-actionlint
+        run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/7fdc9630cc360ea1a469eed64ac6d78caeda1234/scripts/download-actionlint.bash) 1.6.22
+        shell: bash
+      - name: Check workflow files
+        run: ${{ steps.download-actionlint.outputs.executable }} -color
+        shell: bash
+
+  lint-build-test:
+    name: Lint, build, and test
+    needs: check-workflows
+    uses: ./.github/workflows/lint-build-test.yml
+
+  is-release:
+    name: Determine whether this is a release merge commit
+    needs: lint-build-test
+    if: startsWith(github.event.commits[0].author.name, 'github-actions')
+    runs-on: ubuntu-latest
+    outputs:
+      IS_RELEASE: ${{ steps.is-release.outputs.IS_RELEASE }}
+    steps:
+      - uses: MetaMask/action-is-release@v1
+        id: is-release
+
+  publish-release:
+    name: Publish release
+    needs: is-release
+    if: needs.is-release.outputs.IS_RELEASE == 'true'
+    permissions:
+      contents: write
+    uses: ./.github/workflows/publish-release.yml
+
+  all-jobs-pass:
+    name: All jobs pass
+    runs-on: ubuntu-latest
+    needs: lint-build-test
+    steps:
+      - run: echo "Great success!"

.github/workflows/publish-release.yml

@@ -1,58 +1,33 @@
 name: Publish Release
 
 on:
-  push:
-    branches: [main]
+  workflow_call:
 
 jobs:
-  is-release:
-    # release merge commits come from github-actions
-    if: startsWith(github.event.commits[0].author.name, 'github-actions')
-    outputs:
-      IS_RELEASE: ${{ steps.is-release.outputs.IS_RELEASE }}
-    runs-on: ubuntu-latest
-    steps:
-      - uses: MetaMask/action-is-release@v1
-        id: is-release
-
   publish-release:
     permissions:
       contents: write
-    if: needs.is-release.outputs.IS_RELEASE == 'true'
     runs-on: ubuntu-latest
-    needs: is-release
     steps:
       - uses: actions/checkout@v3
         with:
           ref: ${{ github.sha }}
-      - name: Get Node.js version
-        id: nvm
-        run: echo "NODE_VERSION=$(cat .nvmrc)" >> $GITHUB_OUTPUT
       - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: ${{ steps.nvm.outputs.NODE_VERSION }}
+          node-version-file: '.nvmrc'
+          cache: yarn
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ./packages/**/dist
+            ./node_modules/.yarn-state.yml
+          key: ${{ github.sha }}
       - uses: MetaMask/action-publish-release@v2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Get Yarn cache directory
-        run: echo "YARN_CACHE_DIR=$(yarn config get cacheFolder)" >> $GITHUB_OUTPUT
-        id: yarn-cache-dir
-      - name: Get Yarn version
-        run: echo "YARN_VERSION=$(yarn --version)" >> $GITHUB_OUTPUT
-        id: yarn-version
-      - name: Cache yarn dependencies
-        uses: actions/cache@v3
-        with:
-          path: ${{ steps.yarn-cache-dir.outputs.YARN_CACHE_DIR }}
-          key: yarn-cache-${{ runner.os }}-${{ steps.yarn-version.outputs.YARN_VERSION }}-${{ hashFiles('yarn.lock') }}
       - run: yarn --immutable
       - run: yarn build
-      - uses: actions/cache@v3
-        id: restore-build
-        with:
-          path: ./dist
-          key: ${{ github.sha }}
 
   publish-npm-dry-run:
     runs-on: ubuntu-latest
@@ -62,15 +37,14 @@ jobs:
         with:
           ref: ${{ github.sha }}
       - uses: actions/cache@v3
-        id: restore-build
         with:
-          path: ./dist
+          path: |
+            ./packages/**/dist
+            ./node_modules/.yarn-state.yml
           key: ${{ github.sha }}
-        # Set `ignore-scripts` to skip `prepublishOnly` because the release was built already in the previous job
-      - run: npm config set ignore-scripts true
       - name: Dry Run Publish
         # omit npm-token token to perform dry run publish
-        uses: MetaMask/action-npm-publish@v1
+        uses: MetaMask/action-npm-publish@v2
         env:
           SKIP_PREPACK: true
 
@@ -83,14 +57,13 @@ jobs:
         with:
           ref: ${{ github.sha }}
       - uses: actions/cache@v3
-        id: restore-build
         with:
-          path: ./dist
+          path: |
+            ./packages/**/dist
+            ./node_modules/.yarn-state.yml
           key: ${{ github.sha }}
-        # Set `ignore-scripts` to skip `prepublishOnly` because the release was built already in the previous job
-      - run: npm config set ignore-scripts true
       - name: Publish
-        uses: MetaMask/action-npm-publish@v1
+        uses: MetaMask/action-npm-publish@v2
         with:
           npm-token: ${{ secrets.NPM_TOKEN }}
         env:

.gitignore

@@ -24,3 +24,6 @@ docs
 !.yarn/releases
 !.yarn/sdks
 !.yarn/versions
+
+# typescript
+*.tsbuildinfo