versionCheck.yml

name: Version Check

on:
  pull_request:
    types: [opened, edited, synchronize]

jobs:
  check-version:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0 # Fetch all history for all branches

      - name: Fetch base branch
        run: git fetch origin +refs/heads/${{ github.event.pull_request.base.ref }}:refs/remotes/origin/${{ github.event.pull_request.base.ref }}

      - name: Get list of modified files
        id: modified_files
        run: |
          BASE_REF="${{ github.event.pull_request.base.ref }}"

          # get all files modified by this PR
          FILES=$(git diff --name-only origin/${BASE_REF} HEAD)

          # make sure that modified files of this PR are available
          if [[ -z $FILES ]]; then
            echo "No files found. This should not happen. Please check the code of the Github action"
            exit 1
          fi

          # Initialize empty variables
          CONTRACTS=""

          # go through all file names and identify facet, periphery & diamond contracts (other contracts dont have versioning)
          while IFS= read -r FILE; do
            if echo "$FILE" | grep -E '^src/Facets/.*\.sol$'; then
              # facet found
              CONTRACTS="${CONTRACTS}${FILE}"$'\n'
            elif echo "$FILE" | grep -E '^src/Periphery/.*\.sol$'; then
              # periphery found
              CONTRACTS="${CONTRACTS}${FILE}"$'\n'
            elif echo "$FILE" | grep -E '^src/.*\.sol$'; then
              # diamond contract found
              CONTRACTS="${CONTRACTS}${FILE}"$'\n'
            fi
          done <<< "$FILES"

          # if none found, exit here as there is nothing to do
          if [[ -z "$CONTRACTS" ]]; then
            echo "No facets or periphery contracts found in files modified/added by this PR"
            exit 0
          fi

          # Write filenames to temporary files (using variables here was causing issues due to the file names)
          echo -e "$FILES" > modified_files.txt
          echo -e "$CONTRACTS" > modified_contracts.txt

      - name: Check version tags and update PR title
        id: check_versions
        run: |
          BASE_REF="${{ github.event.pull_request.base.ref }}"

          # Read tmp files into variables
          FILES=$(cat modified_files.txt)
          echo "FILES=$FILES"
          CONTRACTS=$(cat modified_contracts.txt)
          echo -e "CONTRACTS=$CONTRACTS"

          # Initialize variables
          MISSING_VERSION_TAG=()
          MISSING_VERSION_UPDATE=()
          UPDATED_CONTRACTS=()

          echo "--------------------"

          # Process each file separately
          while IFS= read -r FILE; do
            echo "Now checking contract: $FILE"
            VERSION_TAG=$(grep -E '^/// @custom:version' "$FILE" || true)
            VERSION=$(echo "$VERSION_TAG" | sed -E 's/^\/\/\/ @custom:version ([0-9]+\.[0-9]+\.[0-9]+).*$/\1/' || true)

            # Extract the filename without extension
            FILENAME=$(basename "$FILE" .sol)

            echo "File: $FILENAME, Version: $VERSION, Version_Tag: $VERSION_TAG"

            # Check if version tag exists
            if [[ -z "$VERSION_TAG" ]]; then
              echo "File $FILENAME does not have a version tag at all"
              MISSING_VERSION_TAG+=("$FILE")
            else
              echo "File $FILENAME does have a version tag"
              # Check if version tag was updated in this PR
              DIFF_OUTPUT=$(git diff origin/${BASE_REF} HEAD "$FILE")
              # echo "Diff output: $DIFF_OUTPUT"
              if echo "$DIFF_OUTPUT" | grep -qE '^\+/// @custom:version'; then
                echo "Version was updated in $FILENAME"
                CONTRACT_NAME=$(basename "$FILE" .sol)
                NEW_VERSION=$(echo "$VERSION_TAG" | awk '{print $NF}')
                TARGET_STRING="${CONTRACT_NAME} v${NEW_VERSION}"
                UPDATED_CONTRACTS+=("$TARGET_STRING")
              else
                echo "Version was not updated in $FILENAME"
                MISSING_VERSION_UPDATE+=("$FILE")
              fi
            fi
            echo "--------------------"
          done <<< "$CONTRACTS"

          # Output the results
          if [[ ${#MISSING_VERSION_TAG[@]} -ne 0 ]]; then
            echo "Files missing version tags: ${MISSING_VERSION_TAG[*]}"
          fi

          if [[ ${#MISSING_VERSION_UPDATE[@]} -ne 0 ]]; then
            echo "Files with version tags not updated: ${MISSING_VERSION_UPDATE[*]}"
          fi

          # if there are any contracts that were (correctly) updated, add them to an array (so we can check the PR title after)
          if [[ ${#UPDATED_CONTRACTS[@]} -ne 0 ]]; then
            echo "Updated contracts and versions: ${UPDATED_CONTRACTS[*]}"
            UPDATED_CONTRACTS_STR=$(IFS=,; echo "${UPDATED_CONTRACTS[*]}")
            echo "UPDATED_CONTRACTS=$UPDATED_CONTRACTS_STR" >> $GITHUB_ENV
          fi

      - name: Update PR title with updated version info
        env:
          PR_TITLE: ${{github.event.pull_request.title}}
          UPDATED_CONTRACTS: ${{ steps.check_versions.outputs.UPDATED_CONTRACTS }}
          UPDATED_CONTRACTS_STR: ${{ steps.check_versions.outputs.UPDATED_CONTRACTS_STR }}
        run: |
          echo "PR_TITLE: $PR_TITLE"
          echo "UPDATED_CONTRACTS: $UPDATED_CONTRACTS"
          echo "UPDATED_CONTRACTS_STR: $UPDATED_CONTRACTS_STR"
          echo "UPDATED_CONTRACTS_STR: ${{env.UPDATED_CONTRACTS_STR}}"

          # Initialize PR title
          PR_TITLE_UPDATED="$PR_TITLE"

          # Check if each target string is in the PR title
          IFS=',' read -ra UPDATED_ARRAY <<< "$UPDATED_CONTRACTS"
          for TARGET_STRING in "${UPDATED_ARRAY[@]}"; do
            if [[ "$PR_TITLE_UPDATED" =~ "$TARGET_STRING" ]]; then
              echo "PR title contains target string ($TARGET_STRING)"
            else
              echo "PR title does not contain target string ($TARGET_STRING)"
              PR_TITLE_UPDATED="$PR_TITLE_UPDATED ($TARGET_STRING)"
            fi
          done

          echo "Final PR Title: $PR_TITLE_UPDATED"
          echo "PR_TITLE=$PR_TITLE_UPDATED" >> $GITHUB_ENV

      # - name: Update the PR title on GitHub
      #   uses: actions/github-script@v5
      #   with:
      #     script: |
      #       const { execSync } = require('child_process');
      #       const prTitle = process.env.PR_TITLE;
      #       github.rest.pulls.update({
      #         owner: context.repo.owner,
      #         repo: context.repo.repo,
      #         pull_number: context.issue.number,
      #         title: prTitle
      #       });