addSizeLabel.yaml

name: Add Size Label

on:
  pull_request:
    types: [ opened, synchronize ]

jobs:
  add-size-label:
    runs-on: ubuntu-latest
    env:
      SMALL_PR_LABEL: "A-SMALL-PR"
      MEDIUM_PR_LABEL: "A-MEDIUM-PR"
      BIG_PR_LABEL: "A-BIG-PR"
      SMALL_THRESHOLD: 400
      MEDIUM_THRESHOLD: 700
    steps:
      - name: Calculate lines changed
        id: calculate-lines-changed
        run: |
          linesAdded=$(jq '.pull_request.additions' $GITHUB_EVENT_PATH)
          linesDeleted=$(jq '.pull_request.deletions' $GITHUB_EVENT_PATH)
          totalLinesChanged=$((linesAdded + linesDeleted))
          echo "lines-changed=${totalLinesChanged}" >>$GITHUB_OUTPUT

      - name: Check if label already exists
        id: check-label
        run: |
          linesChanged=${{ steps.calculate-lines-changed.outputs.lines-changed }}
          labelToAdd=""
          if [ $linesChanged -lt $SMALL_THRESHOLD ]; then
            labelToAdd=$SMALL_PR_LABEL
          elif [ $linesChanged -ge $SMALL_THRESHOLD ] && [ $linesChanged -le $MEDIUM_THRESHOLD ]; then
            labelToAdd=$MEDIUM_PR_LABEL
          else
            labelToAdd=$BIG_PR_LABEL
          fi
          echo "label-to-add=${labelToAdd}" >>$GITHUB_OUTPUT
          existingLabels=$(jq -r '.pull_request.labels[].name' $GITHUB_EVENT_PATH | tr '\n' ' ')
          echo "existing-labels=${existingLabels}" >>$GITHUB_ENV
          echo "Existing labels: $existingLabels"


      - name: Remove existing labels
        if: always()
        run: |
          existingLabels="${{ env.existing-labels }}"
          labelToAdd="${{ steps.check-label.outputs.label-to-add }}"
          echo "Label to add: $labelToAdd"
          echo "Existing labels: ${existingLabels}"
          otherLabels="$SMALL_PR_LABEL $MEDIUM_PR_LABEL $BIG_PR_LABEL"
          echo "Other labels: $otherLabels"

          # Loop through each label in otherLabels
          for otherLabel in $otherLabels; do
            echo "Checking label: $otherLabel"

            # Check if the current label is not equal to labelToAdd
            if [[ "$otherLabel" != "$labelToAdd" ]]; then
              # Check if the current label is in existingLabels
              if [[ "$existingLabels" == *"$otherLabel"* ]]; then
                echo "Label $otherLabel found in existing labels. Deleting..."
                # Send DELETE request to remove the current label
                curl -X DELETE \
                  -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
                  -H "Accept: application/vnd.github.v3+json" \
                  "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.number }}/labels/${otherLabel}"
              else
                echo "Label $otherLabel not found in existing labels."
              fi
            fi
          done

      - name: Add new label if not present
        if: '!contains(env.existing-labels, steps.check-label.outputs.label-to-add)'
        run: |
          labelToAdd="${{ steps.check-label.outputs.label-to-add }}"
          echo "Label to add: $labelToAdd"
          existingLabels="${{ env.existing-labels }}"
          echo "Existing labels: ${existingLabels}"

          echo "Adding label $labelToAdd..."
          # Send POST request to add labelToAdd
          curl -X POST \
            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            -H "Accept: application/vnd.github.v3+json" \
            https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.number }}/labels \
            -d "{\"labels\":[\"${labelToAdd}\"]}"