action.yaml

name: Parallel run
description: Runs any count of task in parallel
author: Artemis Kushner
branding:
  icon: maximize
  color: blue

inputs:
  working-directory:
    type: string
  commands:
    required: true
    type: string

runs:
  using: composite
  steps:
    # This is a cross-platform composite action that needs yq.
    # It's not preinstalled on Windows runners.
    # See https://github.com/actions/runner-images/issues/7443#issuecomment-1514597691
    - name: Make yq tool available on Windows runners
      if: runner.os == 'Windows'
      run: choco install yq
      shell: bash

    - name: Run tasks
      shell: bash
      run: |
        set -f
        set -o pipefail

        pids=()
        command_name=()
        errors=()

        INPUT=$(cat <<-END
        ${{ inputs.commands }}
        END
        );

        # if ${{ inputs.working-directory != '' }}; then
        #   cd ${{ inputs.working-directory }}
        # fi

        # Reading commands
        while IFS=: read -r COMMAND_NAME COMMAND_CALL; do
            eval "$COMMAND_CALL" & pids+=($!)
            command_name+=("$COMMAND_NAME")
        done < <(echo "$INPUT" | yq '.[]')

        # Waiting until all commands finished
        for i in "${!pids[@]}"; do
            if ! wait "${pids[$i]}"; then
            errors+=($i)
            fi
        done

        # Checks if there are errors
        if [ ${#errors[@]} -ne 0 ]; then
            echo "Errors occurred in the following steps:"
            for error in "${errors[@]}"; do
            echo " - ${command_name[$error]}"
            done
            exit 1
        fi

        exit 0