runner

runner is a graph-based orchestrator that calculates and executes workflows in the correct order based on dependencies. It simplifies complex shell scripts into team-manageable YAML files, streamlining your workflow automations.

How Does It Work?

When you run a workflow, it will calculate the graphs based on the workflow dependencies. For example, if you have a git resource, and list it's reverse depdencies, this is the output.

$ cd myService
> myService $ runner rdepends git

git
git -> jdberry-tag
git -> jdberry-tag -> ai-tag
git -> jdberry-tag -> ai-tag -> ai-organize-file

If you run ai-organize-file workflow via runner run ai-organize-file, it will run the workflow on the following order:

1. git
2. jdberry-tag
3. ai-tag
4. ai-organize-file

What Does It Mean For Your Team?

• 🛠 Simplified Automation: Avoid piles of overly complex unmaintainable shell scripts. Use a structured and maintainable YAML configurations, making complex workflows team friendly, easy to collaborate, manage and understand.
• 🚀 Optimized for Developer Experience (DX): Simplify the use of automation workflows for your team, whether it's compiling code & running services in Kubernetes, or managing deployments, making day-to-day tasks more time-saving, efficient and accessible.
• 🔄 GitOps-Ready: Store your scripts and workflows in version control as a single source of truth, enabling seamless tracking, collaboration, and deployment.

Also, there are some nice features

• ⚙️ CI/CD Integration: Deploy runner within Docker images or as part of your CI/CD pipelines.
• 🔧 Language Agnostic: Use 99% YAML configurations, and shell scripts for execution.
• 🌍 Cross-Platform & Multiarchitecture: Supporting over 40 architectures, runner seamlessly adapts whether you’re deploying on cloud infrastructure, Kubernetes clusters, bare-metal machines, or lightweight IoT devices like Raspberry Pi and Arduino.
• 🌐 HTTPs Resource Support: Include YAML resources from local files or external URLs in your workflows, which makes it easier to share and reuse other workflows.

Quick Start Guide

Step 1: Define Your Workflow

Create a runner.yml file that lists the necessary resources for your workflow.

myService/runner.yml:

workflows:
  - resources/github.yaml
  - resources/helmcharts.yaml
  - resources/auth.yaml
  - resources/database.yaml
  - resources/backend.yaml
  - resources/redis.yaml
  - resources/kafka.yaml
  - resources/docker.yaml
  - https://example.com/frontend.yaml

Step 2: Create Your Resources

Define the resources needed for each step of your workflow.

myService/resources/backend1.yaml:

resources:
  - id: backend1
    name: "Backend1 - Setup Authentication"
    desc: "Handles authentication between API calls"
    category: "auth"
    requires:
      - github-access
      - helm-charts
      - helm-postgresql
    run:
      - name: "Clone repository"
        check:
          - "FILE:data/files.txt"
          - "ENV:GH_TOKEN"
          - "CMD:git"
        exec: |
          git clone https://github.com/example/backend1.git backend1
      - name: "Compile project"
        check:
          - "ENV:SOME_TOKEN"
          - "ENV:RUNNER_PARAMS1"
          - "CMD:make"
          - "CMD:go"
        exec: "make build"

Step 3: Execute the Workflow

Run the workflow by specifying the desired resource.

$ cd myService
> myService $ runner run backend1

Step 4: (Optional) Explore Dependencies

List direct or reverse dependencies, and more.

$ cd myService
> myService $ runner rdepends git # show reverse dependencies
> myService $ runner depends git  # show direct dependencies
> myService $ runner index        # list all myService resources
> myService $ runner search git   # search for a resource
> myService $ runner show git     # show the resource
> myService $ runner category     # list all myService resource categories
> myService $ runner run git      # run the git workflow

Advanced Usage

Preflight/Postflight Checks and Skipping Steps

Define conditions that need to be met before (check:) or after (expect:) a step runs. You can also specify skip conditions using the skip: array.

check:
  - "ENV:THIS_PREFLIGHT_ENV_VAR_SHOULD_EXIST"
  - "!ENV:SHOULD_NOT_EXIST"
  - "@URL:https://example.com:3000/api/v2"
expect:
  - "CMD:this_postflight_command_check_should_be_available_in_path"
skip:
  - "FILE:/skip/if/this/file/exists.txt"

Negation and Persistence Flags

You can negate a condition by prefixing it with !, for example, !ENV:SHOULD_NOT_EXIST.

To make a condition persistent, prefix it with @, such as @FILE:/tmp/awaiting_for_this_file.txt. Persistent conditions will be retried until they are satisfied.

Persistent flags applies to all prefixes except ENV:. It can be combined with negation. i.e. !@FILE:/tmp/file.sock

Supported Check Prefixes

• ENV: – Checks if an environment variable exists.
• FILE: – Verifies if a file exists.
• DIR: – Checks if a directory exists.
• URL: – Confirms if a URL is reachable.
• CMD: – Ensures a command is available in the $PATH.
• EXEC: – Runs a command to check if it completes successfully (exit code 0).
• a string value: - Check if the text exists on the output.

Setting Environment Variables

You can set environment variables dynamically using env: blocks, sourcing values from files, commands, or user input.

env:
  - name: "FILE_CONTENTS"
    file: "$RUNNER_PARAMS1"
  - name: "FILE_TYPE"
    exec: "file $RUNNER_PARAMS1"
  - name: "HELLO"
    value: "WORLD"
  - name: "GH_TOKEN"
    input: "Please enter the GH_TOKEN:"

Variables can also be appended directly to $RUNNER_ENV. i.e. echo FOO='bar' >> $RUNNER_ENV

Passing Optional Parameters

You can pass optional parameters using the --params flag. The format is --params "param1;param2", which sets $RUNNER_PARAMS1 and $RUNNER_PARAMS2 in the workflow context.

CLI Commands

A graph-based orchestrator for workflows

Usage:
  runner [command]

Available Commands:
  category    List categories of the given resources
  completion  Generate the autocompletion script for the specified shell
  depends     List dependencies of the given resources
  help        Help for any command
  index       List all resource entries
  rdepends    List reverse dependencies of the given resources
  run         Execute commands for the specified resources
  search      Search for resources
  show        Show details of the specified resources
  tree        Display a dependency tree
  tree-list   List dependencies in a tree-like format

Flags:

  -h, --help            Display help for runner
      --params string   Extra parameters (semi-colon separated)

Use "runner [command] --help" for more information.

Installation

Option 1: Using Go (Go 1.22 or later)

Install runner via go install:

go install github.com/jjuliano/runner@latest

Option 2: Build from Source

Clone the repository and build runner:

git clone https://github.com/jjuliano/runner.git
cd runner
make build

Contributing

To contribute to runner, follow these steps:

1. Clone the repository:

   git clone https://github.com/jjuliano/runner.git

2. Navigate to the project directory:

   cd runner

3. Build the project:

   make build

4. Run tests:

   make test

Feel free to open pull requests or report issues.

License

runner is developed by Joel Bryan Juliano and is licensed under the Apache 2.0 License.