Add Backport automation for separately versioned content

.github/backport-mapping.js

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+const process = require('process');
+const fs = require('fs');
+const yaml = require('js-yaml');
+
+// Create a backport conversion table from the backport-mapping.yml file
+// This is used to map backport labels to directories that should be deleted
+let conversion_table;
+
+try {
+  conversion_table = yaml.load(fs.readFileSync('.github/backport-mapping.yml', 'utf8'));
+} catch (error) {
+  process.stderr(error);
+  process.exit(1)
+}

.github/backport-mapping.yml

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+"[7,8].*":
+  "serverless"

.github/label-mapping.js

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+const process = require('process');
+const fs = require('fs');
+const yaml = require('js-yaml');
+
+// Create a label conversion table from the label-mapping.yml file
+// This is used to map existing labels to new labels
+let conversion_table;
+
+try {
+  conversion_table = yaml.load(fs.readFileSync('.github/label-mapping.yml', 'utf8'));
+} catch (error) {
+  process.stderr(error);
+  process.exit(1)
+}
+
+// Take existing labels and see if they exist in the yml file
+// If they do, keep them. If they don't, remove them from the array
+let existing_labels = (process.argv.slice(2)[0]).split(' '); // [ 'stateful serverless something' ]
+let labels_that_matter = [];
+
+existing_labels.forEach((label) => {
+  // Check to see if the label exists in label-mapping.yml
+  if (label in conversion_table) {
+    labels_that_matter.push(label)
+  }
+})
+
+// For each existing label that matters, map it to the
+// correct backport label
+let labels_to_add = [];
+
+labels_that_matter.forEach((label) => {
+  labels_to_add.push(...conversion_table[label])
+})
+
+// This is hard coded and should be fixed
+// Look for `backport-skip` and remove it if it's the only new label to add
+const skip = "backport-skip"
+if (labels_to_add.includes(skip) && labels_to_add.length != 1){
+  labels_to_add.splice(labels_to_add.indexOf(skip), 1)
+}
+
+process.stdout.write(`{
+  "remove": "${labels_that_matter}",
+  "add": "${labels_to_add}"
+}`)
+process.exit(0)

.github/label-mapping.yml

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+apm-agent-java:
+- 1.x-java
+apm-agent-node:
+- 5.x-node
+cloud:
+- ms200
+- ms201
+- ms300
+stateful:
+- backport-8.13
+- backport-8.12
+serverless:
+- backport-skip

.github/workflows/add-backport-labels.yml

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+name: Add backport labels
+
+on:
+  pull_request:
+    types: [closed]
+
+jobs:
+  remove_and_add_labels:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Get existing labels
+        id: get_labels
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const { data: labels } = await github.issues.listLabelsOnIssue({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number
+            });
+            const labelNames = labels.map(label => label.name);
+            console.log(labelNames.join(','));
+
+            echo "labelNames=$labelNames" >> "$GITHUB_ENV"
+
+      - name: Map to backport labels
+        id: map_backport_labels
+        run: |
+          # Run node script to map existing labels to backport labels
+          val=$(node .github/label-mapping.js "$labelNames")
+
+          # Use jq to extract the values as arrays
+          labels_to_remove=$(jq -r '.remove | split(",")[]' <<< "$val")
+          labels_to_add=$(jq -r '.add | split(",")[]' <<< "$val")
+
+          # Print the arrays
+          echo "The following labels will be removed: ${labels_to_remove[@]}"
+          echo "The following labels will be added: ${labels_to_add[@]}"
+
+          # Save the arrays for a later step
+          echo "labels_to_remove=$labels_to_remove" >> "$GITHUB_ENV"
+          echo "labels_to_add=$labels_to_add" >> "$GITHUB_ENV"
+          # echo "::set-output name=label::${old_labels[random_index]}"
+
+      - name: Remove deployment labels
+        uses: actions/github-script@v5
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            ${{ labels_to_remove }}.foreach((label) => {
+              await github.issues.removeLabel({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number,
+                name: label
+              });
+            })
+
+      - name: Add backport labels
+        uses: actions/github-script@v5
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const { data: pr } = await github.pulls.get({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: context.issue.number
+            });
+            await github.issues.addLabels({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              labels: ${{ labels_to_add }}
+            });

.github/workflows/clean-backports.yml

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+name: Delete Unused Directories
+
+on:
+  pull_request:
+    types: [opened]
+    branches:
+      - "!main"
+
+jobs:
+  delete_serverless_dir:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.pull_request.head.ref =~ '[7,8].*' }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: map dirs
+        run: |
+          val=$(node .github/backport-mapping.js "${{ github.event.pull_request.head.ref }}")
+
+          # Use jq to extract the values as arrays
+          labels_to_remove=$(jq -r '.remove | split(",")[]' <<< "$val")
+          labels_to_add=$(jq -r '.add | split(",")[]' <<< "$val")
+
+          # Print the arrays
+          echo "The following labels will be removed: ${labels_to_remove[@]}"
+          echo "The following labels will be added: ${labels_to_add[@]}"
+
+          # Save the arrays for a later step
+          echo "labels_to_remove=$labels_to_remove" >> "$GITHUB_ENV"
+          echo "labels_to_add=$labels_to_add" >> "$GITHUB_ENV"
+          # echo "::set-output name=label::${old_labels[random_index]}"
+
+      - name: Check if serverless directory exists
+        id: check_serverless_dir
+        run: |
+          if [ -d "serverless" ]; then
+            echo "::set-output name=dir_exists::true"
+          else
+            echo "::set-output name=dir_exists::false"
+          fi
+
+      - name: Delete serverless directory if exists
+        if: steps.check_serverless_dir.outputs.dir_exists == 'true'
+        run: rm -rf serverless
+
+      - name: Commit and push changes
+        if: steps.check_serverless_dir.outputs.dir_exists == 'true'
+        uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: "Delete serverless directory"
+          commit_user_name: "GitHub Actions"
+          commit_user_email: "[email protected]"