feat(go): runtime release tagging

.github/workflows/main.yml

@@ -466,3 +466,95 @@ jobs:
           path: |-
             ${{ github.workspace }}/aws-cdk/dist/
             ${{ github.workspace }}/aws-cdk/**/dist/
+
+  push-go-runtime:
+    needs: build
+    if: github.event_name == 'push'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Node 12
+        uses: actions/[email protected]
+        with:
+          node-version: '12'
+      - name: Download Artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: built-tree
+          path: ${{ github.workspace }}/jsii-built-tree
+      - name: Extract Artifact
+        working-directory: ${{ github.workspace }}/jsii-built-tree
+        run: |-
+          echo "::group::Untar Archive"
+          tar Jxvf built-tree.tar.xz
+          echo "::endgroup"
+
+          rm built-tree.tar.xz
+      - name: Get Last Commit Message
+        id: get-last-commit-msg
+        working-directory: ${{ github.workspace }}/jsii-built-tree
+        run: |-
+          message=$(git log -1 --format=%s)
+          echo "::set-output name=result::$message"
+      - name: Locate Caches
+        id: cache-locations
+        run: |-
+          echo "::set-output name=yarn-cache::$(yarn cache dir)"
+      - name: Cache
+        uses: actions/cache@v2
+        with:
+          path: |-
+            ${{ steps.cache-locations.outputs.yarn-cache }}
+            ${{ github.workspace }}/node_modules
+            ${{ github.workspace }}/*/*/node_modules
+          key: ${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |-
+            ${{ runner.os }}-yarn-
+      - name: Install Dependencies
+        working-directory: ${{ github.workspace }}/jsii-built-tree
+        run: |-
+          yarn install --frozen-lockfile
+      - name: Build Runtime Repo Directory
+        id: build-repo-dir
+        run: |-
+          mkdir ${{ github.workspace }}/jsii-runtime-go
+          repo_dir=${{ github.workspace }}/jsii-runtime-go
+          echo "::set-output name=repodir::$repo_dir"
+      - name: Clone Runtime
+        uses: actions/checkout@v2
+        with:
+          repository: ${{ secrets.JSII_RUNTIME_REPO_NAME }}
+          ref: 'main'
+          token: ${{ secrets.AUTO_APPROVE_GITHUB_TOKEN }}
+          path: ${{ steps.build-repo-dir.outputs.repodir }}
+      - name: Copy Runtime Files
+        working-directory: ${{ github.workspace }}/jsii-built-tree/packages/@jsii/go-runtime
+        run: |-
+          yarn ts-node ./build-tools/build-repo-dir.ts ${{ steps.build-repo-dir.outputs.repodir }}
+      - name: Check for changes
+        id: check-for-changes
+        working-directory: ${{ steps.build-repo-dir.outputs.repodir }}
+        run: |-
+          git fetch --depth=1 --quiet origin main
+          git add .
+          # Check for modifications in tracked files
+          changed=$(git diff --name-only origin/main)
+          if [-z "$changed"]; then
+            echo "::set-output name=result::false"
+          else
+            echo "::set-output name=result::true"
+          fi
+      - name: Commit and Push
+        if: steps.check-for-changes.outputs.result == 'true'
+        working-directory: ${{ steps.build-repo-dir.outputs.repodir }}
+        run: |-
+          git config user.name "AWS CDK Automation"
+          git config user.email "[email protected]"
+          git commit -m "${{ steps.get-last-commit-msg.outputs.result }}"
+          git push
+      - name: Tag Release
+        if: github.ref == 'refs/head/release'
+        run: |-
+          VERSION=$(node -e 'console.log(require("./lerna.json").version)')
+          cd ${{ steps.build-repo-dir.outputs.repodir }}
+          git tag -a $VERSION -m "v$VERSION"
+          git push $VERSION

packages/@jsii/go-runtime/build-tools/build-repo-dir.ts

@@ -1,21 +1,10 @@
 #!/usr/bin/env npx ts-node
 
-import { SpawnOptions } from 'child_process';
 import * as fs from 'fs-extra';
 import * as path from 'path';
 
-import { runCommand } from './_constants';
-
 // Constants
 const RUNTIME_DIR = path.resolve(__dirname, '..', 'jsii-experimental');
-// Destination repo configuration
-const REPO_NAME = process.env.JSII_RUNTIME_REPO_NAME;
-const USERNAME = process.env.JSII_RUNTIME_REPO_USERNAME;
-const TOKEN = process.env.JSII_RUNTIME_REPO_TOKEN;
-const REMOTE =
-  USERNAME && TOKEN
-    ? `https://${USERNAME}:${TOKEN}@github.com/${REPO_NAME}.git`
-    : `https://github.com${REPO_NAME}.git`;
 
 // Always preserve these files/paths from the cloned repo
 const PRESERVE = ['.git', '.gitignore'];
@@ -28,18 +17,10 @@ const DONT_OVERWRITE = [...PRESERVE, ...ROOT_FILES, ...LOCAL_FILES];
 
 async function main() {
   const args = process.argv.slice(2);
-  console.log(args[0]);
   await makeRepoDir(args[0]);
 }
 
 async function makeRepoDir(dir: string) {
-  const runRepoCmd = (
-    cmd: string,
-    args: readonly string[],
-    opts: SpawnOptions = {},
-  ) => runCommand(cmd, args, { cwd: dir, ...opts });
-  runRepoCmd('git', ['clone', REMOTE, '.'], { stdio: 'inherit' });
-
   // Clone repo and delete its contents except nodes in the PRESERVE list.
   const clonedFiles = await fs.readdir(dir);
   await Promise.all(