feat: amba (#94)

Adds Azure Monitor Baseline Alerts as an independent library member that
can be used to augment an existing deployment.

In future we will publish one that combines ALZ and AMBA for ease of
consumption.

---------

Co-authored-by: Arjen Huitema <arjenhuitema@microsoft.com>
Co-authored-by: github-actions <action@github.com>

.github/workflows/update-amba.yml

@@ -0,0 +1,174 @@
+---
+  name: update platform/amba
+
+  # yamllint disable-line rule:truthy
+  on:
+    schedule:
+      - cron: "0 8 * * 1-5"
+    workflow_dispatch: {}
+
+  permissions:
+    contents: write
+
+  env:
+    alz_repository: "Azure/Enterprise-Scale"
+    remote_repository: "Azure/azure-monitor-baseline-alerts"
+    alzlib_repository: "Azure/alzlib"
+    library_dir: "platform/amba"
+    pr_title: "feat: update platform/amba library (automated)"
+    pr_body: |-
+      This is an automated pull_request containing updates to the library templates stored in 'platform/amba'.
+      Please review the files changed tab to review changes.
+
+  jobs:
+    update-lib:
+      name: update
+      runs-on: ubuntu-latest
+      environment: libupdate
+      steps:
+        - name: Local repository checkout
+          uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+          with:
+            path: ${{ github.repository }}
+            fetch-depth: 0
+
+        - name: Remote repository checkout
+          uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+          with:
+            repository: ${{ env.remote_repository }}
+            path: ${{ env.remote_repository }}
+            ref: main
+
+        - name: Alz repository checkout
+          uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+          with:
+            repository: ${{ env.alz_repository }}
+            path: ${{ env.alz_repository }}
+            ref: main
+
+        - name: setup go
+          uses: actions/setup-go@cdcb36043654635271a94b9a6d1392de5bb323a7 # v5.0.1
+          with:
+            go-version: 'stable'
+
+        - name: install alzlibtool
+          run: go install github.com/Azure/alzlib/cmd/alzlibtool@v0.18.0
+
+        - uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a # v2.1.0
+          id: generate-token
+          with:
+            app_id: ${{ secrets.TOKEN_APP_ID }}
+            private_key: ${{ secrets.TOKEN_APP_PRIVATE_KEY }}
+
+        - name: Configure local git
+          run: |
+            git config user.name github-actions
+            git config user.email action@github.com
+          working-directory: ${{ github.repository }}
+
+        - name: Create and checkout branch
+          id: branch
+          run: |
+            BRANCH="platform-amba-${{ github.run_number }}"
+            echo "name=$BRANCH" >> "$GITHUB_OUTPUT"
+            git checkout -b "$BRANCH"
+          working-directory: ${{ github.repository }}
+          env:
+            GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
+
+        - name: Copy policy definitions
+          uses: azure/powershell@53dd145408794f7e80f97cfcca04155c85234709 # v2.0.0
+          with:
+            inlineScript: |
+              Write-Information "==> Running copy policy definitions script..." -InformationAction Continue
+              ${{ github.repository }}/platform/amba/scripts/Copy-PolicyDefinitions.ps1 `
+                -TemplatePath "${{ github.workspace }}/${{ env.remote_repository }}/patterns/alz/templates" `
+                -TargetPath "${{ github.workspace }}/${{ github.repository }}/${{ env.library_dir }}/policy_definitions_copy" `
+                -SourcePath "${{ github.workspace }}/${{ env.remote_repository }}"
+            azPSVersion: "latest"
+
+        - name: Update library policy definitions
+          run: |
+            alzlibtool convert policydefinition -o \
+              "${{ github.workspace }}/${{ github.repository }}/${{ env.library_dir }}/policy_definitions_copy" \
+              "${{ github.workspace }}/${{ github.repository }}/${{ env.library_dir }}/policy_definitions"
+
+        - name: Update library policy set definitions
+          run: |
+            alzlibtool convert policysetdefinition -o \
+              "${{ github.workspace }}/${{ env.remote_repository }}/patterns/alz/policySetDefinitions" \
+              "${{ github.workspace }}/${{ github.repository }}/${{ env.library_dir }}/policy_set_definitions"
+
+        - name: Clean up copied policy definitions
+          run: |
+            rm -rf "${{ github.workspace }}/${{ github.repository }}/${{ env.library_dir }}/policy_definitions_copy"
+          working-directory: ${{ github.workspace }}
+
+        - name: Remove deprecated policy definitions
+          run: |
+            rm -rf "${{ github.workspace }}/${{ github.repository }}/${{ env.library_dir }}/policy_set_definitions/Alerting-LandingZone.alz_policy_set_definition.json"
+          working-directory: ${{ github.workspace }}
+
+        - name: Update library policy assignments and archetypes
+          uses: azure/powershell@53dd145408794f7e80f97cfcca04155c85234709 # v2.0.0
+          with:
+            inlineScript: |
+              Write-Information "==> Running policy assignments and archetypes script..." -InformationAction Continue
+              ${{ github.repository }}/platform/amba/scripts/Invoke-LibraryUpdatePolicyAssignmentArchetypes.ps1 `
+                -AlzToolsPath "${{ github.workspace }}/${{ env.alz_repository }}/src/Alz.Tools/" `
+                -TargetPath "${{ github.workspace }}/${{ github.repository }}" `
+                -SourcePath "${{ github.workspace }}/${{ env.remote_repository }}"
+            azPSVersion: "latest"
+
+        - name: Update library policy definitions in archetype definitions
+          uses: azure/powershell@53dd145408794f7e80f97cfcca04155c85234709 # v2.0.0
+          with:
+            inlineScript: |
+              Write-Information "==> Running policy definitions in archetype definitions script..." -InformationAction Continue
+              ${{ github.repository }}/platform/amba/scripts/Invoke-LibraryUpdatePolicyDefinitions.ps1 `
+                -AlzToolsPath "${{ github.workspace }}/${{ env.alz_repository }}/src/Alz.Tools/" `
+                -TargetPath "${{ github.workspace }}/${{ github.repository }}" `
+                -SourcePath "${{ github.workspace }}/${{ env.remote_repository }}"
+            azPSVersion: "latest"
+
+        - name: Check for changes
+          id: git_status
+          run: |
+            mapfile -t "CHECK_GIT_STATUS" < <(git status -s ${{ env.library_dir }})
+            printf "%s\n" "${CHECK_GIT_STATUS[@]}"
+            echo "changes=${#CHECK_GIT_STATUS[@]}" >> "$GITHUB_OUTPUT"
+          working-directory: ${{ github.workspace }}/${{ github.repository }}
+
+        - name: Add files, commit and push
+          if: steps.git_status.outputs.changes > 0
+          run: |
+            echo "Pushing changes to origin..."
+            git add ${{ env.library_dir }}
+            git commit -m '${{ env.pr_title }}'
+            git push origin ${{ steps.branch.outputs.name }}
+          working-directory: ${{ github.repository }}
+
+        - name: Create pull request
+          if: steps.git_status.outputs.changes > 0
+          id: pr
+          run: |
+            PR="$(gh pr create \
+              --title "${{ env.pr_title }}" \
+              --body "${{ env.pr_body }}" \
+              --base "${{ github.ref }}" \
+              --head "${{ steps.branch.outputs.name }}" \
+              --draft)"
+              echo "Created new PR: $CHECK_PULL_REQUEST_URL"
+              echo number=$(gh pr view $PR_URL --json number | jq -r '.number') >> "$GITHUB_OUTPUT"
+          working-directory: ${{ github.repository }}
+          env:
+            GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
+
+        - name: close and comment out of date prs
+          if: steps.git_status.outputs.changes > 0
+          run: |
+            PULL_REQUESTS=$(gh pr list --search 'feat: update platform/amba library (automated)' --json number,headRefName)
+            echo "$PULL_REQUESTS" | jq -r '.[] | select(.number != ${{ steps.pr.outputs.number }}) | .number' | xargs -I {} gh pr close {} --delete-branch --comment "Supersceeded by #${{ steps.pr.outputs.pull-request-number }}"
+          working-directory: ${{ github.repository }}
+          env:
+            GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}