action.yaml

# Code credit to Menci
# https://github.dev/Menci/aur.men.ci/blob/b046173011fdf89c669901d9d4985330b273c6e3/.github/actions/upload-and-commit-database/action.yaml

name: Transactionally Commit Packages to Repo
inputs:
  azure-blob-storage-connection-string:
    description: The connection string of Azure Blob Storage.
    required: true
  azure-blob-storage-container:
    description: The container of Azure Blob Storage.
    required: true
  package-files:
    required: true
  arch:
    required: true
runs:
  using: composite
  steps:
    - shell: bash
      run: |
        echo "::group::Install pcregrep"
        sudo apt-get update
        sudo apt-get -y install pcregrep
        echo "::endgroup::"

        CACHE_CONTROL_DATABASE_FILE="no-cache"

        for ARCH in ${{ inputs.arch }}
        do
          TRIES=0
          while true; do
            ((TRIES=TRIES+1))

            echo "::group::Update repo database: ${TRIES}-th try"

            TEMP_DB_FILE_DIRECTORY="$(mktemp -d -t db-file-XXXXXXXX)"
            TEMP_DB_FILE="$TEMP_DB_FILE_DIRECTORY/Clansty.db.tar.gz"
            TEMP_DB_FILE_DOT_FILES="$TEMP_DB_FILE_DIRECTORY/Clansty.files.tar.gz"

            TARGET_PATH=${ARCH}/files.tar.gz

            echo "Downloading old database file"
            EXISTS="$(az storage blob exists --connection-string "$AZURE_BLOB_STORAGE_CONNECTION_STRING" --container-name "$AZURE_BLOB_STORAGE_CONTAINER" --name "$TARGET_PATH" | jq -r .exists)"
            UPLOAD_CONDITION=()
            if [[ "$EXISTS" == "true" ]]; then
                ETAG="$(az storage blob download --connection-string "$AZURE_BLOB_STORAGE_CONNECTION_STRING" --container-name "$AZURE_BLOB_STORAGE_CONTAINER" --file "$TEMP_DB_FILE" --name "$TARGET_PATH" | jq -r .properties.etag)"
                if [[ "$ETAG" == "" ]]; then
                    echo "Failed to download old database file!"
                    exit 1
                fi
                UPLOAD_CONDITION+=('--if-match')
                UPLOAD_CONDITION+=("$ETAG")
            else
                tar cvfJ "$TEMP_DB_FILE" --files-from=/dev/null
                UPLOAD_CONDITION+=('--if-none-match')
                UPLOAD_CONDITION+=('*')
            fi

            # 其实 .files 和 .db 两个文件只要一个 .files 的就够了，可以当 db 使
            echo "Adding packages to database file"
            cp "$TEMP_DB_FILE" "$TEMP_DB_FILE_DOT_FILES"
            docker run --rm -v "$TEMP_DB_FILE_DIRECTORY":/repo -v "/github/workspace":"/github/workspace" -v /home:/home -v "$PWD":"$PWD" -w "$PWD" archlinux:latest bash -c 'repo-add /repo/*.db.tar.gz ${{ inputs.package-files }}'
            sudo chown -R $(id -u):$(id -g) "$TEMP_DB_FILE_DIRECTORY"
            rm "$TEMP_DB_FILE_DOT_FILES"

            echo "Try upload new database file"
            if ! UPLOAD_OUTPUT="$(az storage blob upload --connection-string "$AZURE_BLOB_STORAGE_CONNECTION_STRING" --container-name "$AZURE_BLOB_STORAGE_CONTAINER" --file "$TEMP_DB_FILE" --name "$TARGET_PATH" --content-cache "$CACHE_CONTROL_DATABASE_FILE" --overwrite true "${UPLOAD_CONDITION[@]}" 2>&1)"; then
                if ! echo "$UPLOAD_OUTPUT" | grep 'ConditionNotMet\|BlobAlreadyExists'; then
                    echo "Unknown error when uploading new database file: $UPLOAD_OUTPUT"
                    exit 1
                fi
            else
                echo "Uploaded new database file successfully!"
                break
            fi

            rm -rf "$TEMP_DB_FILE_DIRECTORY"

            echo "::endgroup::"
          done
          echo 更新 $ARCH 成功
        done
        
      env:
        AZURE_BLOB_STORAGE_CONNECTION_STRING: ${{ inputs.azure-blob-storage-connection-string }}
        AZURE_BLOB_STORAGE_CONTAINER: ${{ inputs.azure-blob-storage-container }}