Add Terraform plan as comment to deployment PR (#212)

* Add release-process.md and update deploy workflow to run on all versioned tags.
Also, remove value-created-log.md.

* Run deploy workflow on push to main or staging branches.

* Add workflow to open a PR on commit to main. (Includes organize-workflows branch for debugging w/o excessive merging)

* Update release-process.md with PR workflow

* Move PR creation workflow to shared workflow

* Check out repo as first step in pr creation

* Add missing trailing backslash

* remove automerge label

* Quote debugging

* Remove debug feature branch trigger

* Add workflow to add Terraform plan as comment to PR

* For testing, run terraform plan workflow on merge to main

* Add DEPLOY_ENV env var

* Store output of terraform plan so we can use it in a comment

* Lookup prior comment

.github/workflows/_terraform-plan-pr-comment.yml

@@ -0,0 +1,103 @@
+name: Add Terraform CDK plan as comment on pull request
+
+on:
+  workflow_call:
+    inputs:
+      deploy-env:
+        required: true
+        type: string
+
+env:
+  DEPLOY_ENV: ${{ inputs.deploy-env }}
+
+jobs:
+  terraform:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Read node version from `.nvmrc` file
+        id: nvmrc
+        shell: bash
+        run: echo ::set-output name=NODE_VERSION::$(cat .nvmrc)
+
+      - name: Install required node.js version
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ steps.nvmrc.outputs.NODE_VERSION }}
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        id: pnpm-install
+        with:
+          version: 8
+          run_install: false
+
+      - name: Get pnpm store directory
+        id: pnpm-cache
+        shell: bash
+        run: |
+          echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT
+
+      - uses: actions/cache@v3
+        name: Setup pnpm cache
+        with:
+          path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
+
+      - name: Install dependencies
+        run: pnpm install
+
+      - name: Initialize Terraform CDK configuration
+        shell: bash
+        run: |
+          cd infra
+          pnpm cdktf get
+          pnpm build:tsc
+
+      - name: Install CloudFoundry CLI
+        run: |
+          curl -L "https://packages.cloudfoundry.org/stable?release=linux64-binary&version=v8&source=github" | sudo tar -zx --directory=/usr/local/bin
+          cf --version
+
+      - name: Configure CloudFoundry API endpoint
+        run: |
+          cf api https://api.fr.cloud.gov
+
+      - name: Show Terraform plan
+        id: show_plan
+        env:
+          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+        shell: bash
+        run: |
+          output=$(DEPLOY_ENV=${DEPLOY_ENV} pnpm cdktf diff --no-color --app "npx ts-node src/index.ts")
+          echo "${output}"
+          echo "::set-output name=stdout::$output"
+        working-directory: infra
+
+      - name: Find Comment
+        uses: peter-evans/find-comment@v3
+        id: find_comment
+        with:
+          issue-number: ${{ github.event.pull_request.number }}
+          comment-author: 'github-actions[bot]'
+          body-includes: '<!-- terraform-plan-comment -->'
+
+      - name: Create or update PR comment with Terraform plan
+        uses: peter-evans/create-or-update-comment@v4
+        with:
+          comment-id: ${{ steps.find_comment.outputs.comment-id }}
+          issue-number: ${{ github.event.pull_request.number }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+          repository: ${{ github.repository }}
+          body: |
+            <!-- terraform-plan-comment -->
+            **Terraform Plan**
+            ```terraform
+            ${{ steps.show_plan.outputs.stdout }}
+            ```
+          edit-mode: replace

.github/workflows/add-terraform-plan-to-pr.yml

@@ -0,0 +1,18 @@
+name: Add Terraform CDK plan as comment on pull request
+
+on:
+  pull_request:
+    branches:
+      - staging
+      - main
+    types:
+      - opened
+      - synchronize
+      - reopened
+
+jobs:
+  add-terraform-plan-to-staging-pr:
+    uses: ./.github/workflows/_terraform-plan-pr-comment.yml
+    secrets: inherit
+    with:
+      deploy-env: staging