Multi Line commands and Executing Third Party Libraries

In this guide, you’ll learn how to streamline your GitHub Actions workflow by combining multiple shell commands into a single step and integrating a third-party CLI tool (cowsay). This approach reduces verbosity and keeps your CI/CD pipeline maintainable.

Workflow with Separate Steps

Initially, our workflow consisted of four discrete steps:

name: My First Workflow
on: push
jobs:
  first_job:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Repo
        uses: actions/checkout@v4

      - name: Welcome message
        run: echo "My first GitHub Actions Job"

      - name: List files
        run: ls

      - name: Read file
        run: cat README.md

While functional, this pattern can become repetitive as your CI job grows.

Combining Multiple Commands in One Step

You can collapse several shell commands under a single run key by using a multiline pipe (|). Each command executes in sequence on the same virtual environment.

Grouping commands reduces the number of workflow steps and improves readability. Remember that if any command fails, the entire step stops.

name: My First Workflow
on: push
jobs:
  first_job:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Repo
        uses: actions/checkout@v4

      - name: List and Read Files
        run: |
          echo "My first GitHub Actions Job"
          ls -ltra
          cat README.md

Adding a Third-Party CLI Tool

Next, let’s use cowsay—a fun ASCII art generator—to create a dragon illustration and append it to dragon.txt:

      - name: Generate ASCII Artwork
        run: cowsay -f dragon "Run for cover, I am a DRAGON....RAWR" >> dragon.txt

The default Ubuntu runner does not include cowsay. You must install it before running the command.

Installing Dependencies

Add an installation step immediately before invoking cowsay:

      - name: Install Cowsay
        run: |
          sudo apt-get update
          sudo apt-get install -y cowsay

Complete Workflow Example

Putting it all together, here’s your optimized workflow:

name: My First Workflow
on: push
jobs:
  first_job:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Repo
        uses: actions/checkout@v4

      - name: List and Read Files
        run: |
          echo "My first GitHub Actions Job"
          ls -ltra
          cat README.md

      - name: Install Cowsay
        run: |
          sudo apt-get update
          sudo apt-get install -y cowsay

      - name: Generate ASCII Artwork
        run: cowsay -f dragon "Run for cover, I am a DRAGON....RAWR" >> dragon.txt

Step Name	Action	Purpose
Checkout Repo	`uses`	Clone the repository to the runner
List and Read Files	`run` (multiline)	Echo a message, list and read files
Install Cowsay	`run` (multiline)	Install the `cowsay` package
Generate ASCII Artwork	`run`	Generate ASCII art into `dragon.txt`

Troubleshooting

Once you commit and push these changes, navigate to the Actions tab to monitor your workflow. If you forget to install cowsay, you’ll see a failure like this:

The image shows a GitHub Actions workflow interface with a job named "first_job" that has failed. The steps include setting up the job, checking out the repository, listing and reading a file, generating ASCII artwork, and completing the job.

Introduction

GitHub Actions - Core Concepts

Continuous Integration with GitHub Actions

Continuous Deployment with GitHub Actions

Reusable Workflows and Reporting

Custom Actions

Self Hosted Runner

Security Guide

GitHub Actions in the Enterprise Cloud

Multi Line commands and Executing Third Party Libraries

Workflow with Separate Steps

Combining Multiple Commands in One Step

Adding a Third-Party CLI Tool

Installing Dependencies

Complete Workflow Example

Troubleshooting

References

Watch Video

​Workflow with Separate Steps

​Combining Multiple Commands in One Step

​Adding a Third-Party CLI Tool

​Installing Dependencies

​Complete Workflow Example

​Troubleshooting

​References

Watch Video

Workflow with Separate Steps

Combining Multiple Commands in One Step

Adding a Third-Party CLI Tool

Installing Dependencies

Complete Workflow Example

Troubleshooting

References