hash.yml

name: Hash Released Files

on:
  release:
    types:
      - published  # Trigger the workflow when a release, pre-release, or draft of a release was published
      - edited     # Trigger the workflow when the details of a release, pre-release, or draft release were edited

concurrency:
  group: hash-${{ github.event.release.tag_name }}  # Use the release tag name for concurrency
  cancel-in-progress: true  # Cancel any in-progress runs for the same group

jobs:
  calculate-hashes:
    runs-on: ubuntu-latest  # Use the latest Ubuntu environment
    if: github.repository == 'sandboxie-plus/Sandboxie'  # Only run this job if the event is from the specified repository
    permissions:
      contents: write  # Allow writing to the repository's contents

    env:
      HASH_FILE: "sha256-checksums.txt"  # Name of the file for storing SHA256 hashes
      GITHUB_API_VERSION: "2022-11-28"   # Define the GitHub API version as a variable

    steps:
      - name: Download release assets
        run: |
          mkdir -p assets  # Create a directory for downloaded assets
          TAG=${{ github.event.release.tag_name }}  # Get the release tag name
          
          # Fetch asset data from GitHub API
          ASSET_DATA=$(curl -sSL \
            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            -H "X-GitHub-Api-Version: ${{ env.GITHUB_API_VERSION }}" \
            "https://api.github.com/repos/${{ github.repository }}/releases/tags/$TAG")
          
          ASSET_URLS=($(echo "$ASSET_DATA" | jq -r '.assets[].browser_download_url'))  # Extract asset URLs
          ASSET_NAMES=($(echo "$ASSET_DATA" | jq -r '.assets[].name'))  # Extract asset names

          # Download each asset
          for i in "${!ASSET_URLS[@]}"; do
            url="${ASSET_URLS[i]}"  # Current asset URL
            name="${ASSET_NAMES[i]}"  # Current asset name
            echo "Downloading: $url"
            if ! curl --fail -L -o "assets/$name" "$url"; then
              echo "Failed to download: $url"
              exit 1  # Exit on failure
            fi
          done

      - name: Check for downloaded assets
        id: check_assets
        run: |
          # Check if any assets were downloaded (excluding the hash file)
          if [ "$(ls -A assets | grep -v ${{ env.HASH_FILE }})" ]; then
            echo "Assets downloaded."
            echo "assets_downloaded=true" >> $GITHUB_ENV
          else
            echo "No assets downloaded."
            echo "assets_downloaded=false" >> $GITHUB_ENV
          fi

      - name: Calculate file hashes
        if: env.assets_downloaded == 'true'  # Only run if assets were downloaded
        run: |
          cd assets  # Change to the assets directory
          ls -la  # List files for debugging
          > "../${{ env.HASH_FILE }}"  # Clear or create the hash file

          # Loop through each file and calculate its SHA256 hash
          for file in *; do
            if [[ "$file" == "${{ env.HASH_FILE }}" ]]; then  # Skip the hash file itself
              echo "Skipping: $file"
              continue
            fi
            echo "Calculating hash for: $file"
            hash_value=$(sha256sum "$file" | awk '{ print $1 }')  # Calculate the hash
            echo "$hash_value  $file" >> "../${{ env.HASH_FILE }}"  # Append hash to the hash file
          done
          # Change back to the previous directory to reference the new hash file
          cd ..
          cat "${{ env.HASH_FILE }}"  # Display the contents of the new hash file

      - name: Check and upload hashes to release
        if: env.assets_downloaded == 'true'  # Only run if assets were downloaded
        run: |
          # Get the Release ID using the GitHub API
          RELEASE_ID=$(curl -sL \
            -H "Accept: application/vnd.github+json" \
            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            -H "X-GitHub-Api-Version: ${{ env.GITHUB_API_VERSION }}" \
            "https://api.github.com/repos/${{ github.repository }}/releases/tags/${{ github.event.release.tag_name }}" | \
            jq -r '.id')

          echo "Release ID: $RELEASE_ID"

          # Check if an existing hash file asset is present
          EXISTING_HASH_FILE="assets/${{ env.HASH_FILE }}"
          if [ -f "$EXISTING_HASH_FILE" ]; then
            echo "Found existing hash file. Comparing..."
            # Print the contents of both files for debugging
            echo "New hash file contents:"
            cat "${{ env.HASH_FILE }}"

            echo "Existing hash file contents:"
            cat "$EXISTING_HASH_FILE"

            # Compare the new hash file with the existing one
            if cmp -s "${{ env.HASH_FILE }}" "$EXISTING_HASH_FILE"; then
              echo "Hashes are the same. Skipping upload."
              exit 0  # Exit if hashes are the same
            else
              echo "Hashes are different."
              # Show differences for debugging
              diff "${{ env.HASH_FILE }}" "$EXISTING_HASH_FILE" || true

              # Proceed to delete the existing asset if necessary
              EXISTING_ASSET_ID=$(curl -sL \
                -H "Accept: application/vnd.github+json" \
                -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
                -H "X-GitHub-Api-Version: ${{ env.GITHUB_API_VERSION }}" \
                "https://api.github.com/repos/${{ github.repository }}/releases/$RELEASE_ID/assets" | \
                jq -r --arg FILE_NAME "${{ env.HASH_FILE }}" '.[] | select(.name == $FILE_NAME) | .id')

              if [ -n "$EXISTING_ASSET_ID" ]; then
                echo "Deleting existing asset..."
                curl -sL \
                  -X DELETE \
                  -H "Accept: application/vnd.github+json" \
                  -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
                  -H "X-GitHub-Api-Version: ${{ env.GITHUB_API_VERSION }}" \
                  "https://api.github.com/repos/${{ github.repository }}/releases/assets/$EXISTING_ASSET_ID" || { echo "Failed to delete asset"; exit 1; }
              fi
            fi
          else
            echo "No existing hash file found."
          fi

          # Upload the new hash file to the release
          echo "Uploading new hash file..."
          curl -sL \
            -X POST \
            -H "Accept: application/vnd.github+json" \
            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            -H "X-GitHub-Api-Version: ${{ env.GITHUB_API_VERSION }}" \
            -H "Content-Type: application/octet-stream" \
            "https://uploads.github.com/repos/${{ github.repository }}/releases/$RELEASE_ID/assets?name=${{ env.HASH_FILE }}" \
            --data-binary @"${{ github.workspace }}/${{ env.HASH_FILE }}" || { echo "Failed to upload hash file"; exit 1; }