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Contributing to analytics-uploader

Getting Started

Prerequisites

  • Node.js (version 22 or higher)
  • pnpm (version 10.23.0 or higher) - This is the package manager we use for this project

Installation

  1. Clone the repository:

    git clone <repository-url>
cd analytics-uploader

  2. Install dependencies:

    pnpm install

Development Tools

This project uses the following tools:

  • pnpm - Package manager for Node.js dependencies
  • TypeScript - Type-safe JavaScript development
  • Jest - Testing framework
  • @vercel/ncc - Bundles TypeScript code into a single JavaScript file
  • Trunk - Code quality and linting tool (configured in .trunk/trunk.yaml)
  • ESLint - Code linting
  • Prettier - Code formatting

Build Process

This project must be built before it can run. The source code is written in TypeScript and located in src/, but the actual GitHub Action runs the bundled JavaScript file from dist/index.js.

Building the Project

To build the project, run:

pnpm build

This command uses @vercel/ncc to bundle src/index.ts into dist/index.js, which is what gets executed when the GitHub Action runs (as specified in action.yaml).

Pre-commit Hook

Important: The code is automatically built before each commit via a pre-commit git hook. This is configured in .trunk/trunk.yaml and runs pnpm build && git add dist/index.js automatically. This ensures that:

  1. The built code is always up-to-date with your changes
  2. Tests can run against the built code (tests import from the built dist/ directory)
  3. The committed code is ready to run in GitHub Actions

You don't need to manually build before committing, but you may want to build manually to test your changes locally.

How It Works

Architecture Overview

The analytics-uploader is a wrapper around the trunk-io/analytics-cli tool. It provides a GitHub Actions interface for uploading test results to Trunk Analytics.

Key Components

  1. CLI Download and Caching

    • The action downloads the trunk-analytics-cli binary from GitHub releases (trunk-io/analytics-cli)
    • The binary is downloaded based on the platform and architecture (Linux x64/ARM64, macOS x64/ARM64, Windows x64)
    • When use-cache is enabled, the binary is cached using GitHub Actions cache to reduce download times
    • The CLI version can be specified via the cli-version input (defaults to latest)

  2. Flag Parsing and Forwarding

    • GitHub Actions inputs are parsed from action.yaml and core.getInput()
    • Flags are converted from GitHub Actions input format to CLI flag format
    • Boolean inputs are converted to flags like --flag=true or --flag=false
    • All flags are passed to the underlying trunk-analytics-cli binary via command-line arguments
    • The command is constructed in src/lib.ts in the main() function

  3. Telemetry Integration

    • The action integrates with internal telemetry services to report failures
    • Failure reasons are captured and reported when the CLI execution fails
    • Telemetry failures are non-blocking and won't affect the action's execution

Flag Flow

Here's how flags flow through the system:

  1. GitHub Actions Input → Defined in action.yaml (e.g., junit-paths, org-slug, verbose)
  2. Input Parsing → getInputs() function in src/lib.ts reads inputs via core.getInput()
  3. Flag Conversion → Boolean inputs are converted using parseBoolIntoFlag(), other inputs are formatted as CLI arguments
  4. Command Construction → Flags are assembled into a command string in the main() function
  5. CLI Execution → The command is executed via execSync(), passing all flags to the downloaded trunk-analytics-cli binary

Example: The GitHub Actions input verbose: true becomes the CLI flag -v in the command.

Testing

Running Tests

Tests are located in the __tests__/ directory and use Jest. To run tests:

pnpm test

Note: Tests import from the built code in dist/, so you need to build the project before running tests:

pnpm build
pnpm test

The pre-commit hook ensures the build is up-to-date, but for local development, you may need to build manually.

Test Structure

Tests use mocks for GitHub Actions modules (@actions/core, @actions/github) and global.fetch to avoid making real API calls during testing. The test fixtures are located in __fixtures__/.

Running Locally

Utilizing @github/local-action, this action can be run locally. To do so copy and update .env.example to .env and then run pnpm run local-action. At a minimum, INPUT_ORG-SLUG and INPUT_TOKEN need to be updated with your own values to complete an upload.

In .env inputs for the action can be specified with INPUT_<UPPERCASE-OF-INPUT-NAME> e.x. INPUT_REPO-ROOT or INPUT_CLI-VERSION. See action.yaml for the full list of inputs.

Development Workflow

  1. Make your changes in src/
  2. Build the project: pnpm build (or let the pre-commit hook do it)
  3. Run tests: pnpm test
  4. Check code quality: Trunk will run automatically on pre-commit, or you can run trunk check manually
  5. Commit: The pre-commit hook will automatically build and stage dist/index.js

Releases

Creating a Release

Releases are manually created via the Releases tab on GitHub:

  1. Go to the repository's Releases page on GitHub
  2. Click "Draft a new release"
  3. Create a new tag (e.g., v2.0.0) and generate release notes
  4. Publish the release

Updating Major Version Tags

After creating a new release and verifying it works correctly, update the major version tag (e.g., v2) to point to the latest release using the Update release version workflow:

  1. Go to the Actions tab on GitHub
  2. Select the Update release version workflow
  3. Click Run workflow
  4. Provide the following inputs:
    • target: The tag of the release you just created (e.g., v1.2.3)
    • major_version: The major version tag to update (v1 or v2)
  5. Run the workflow

This will move the major version tag (e.g., v2) to point to the specified release tag, allowing users to reference the action with a major version that automatically points to the latest release in that version line.

Project Structure

  • src/ - TypeScript source code
    • index.ts - Entry point
    • lib.ts - Main logic, CLI download, flag parsing, telemetry
  • dist/ - Built JavaScript (generated, do not edit directly)
  • __tests__/ - Test files
  • __fixtures__/ - Test mocks and fixtures
  • action.yaml - GitHub Actions action definition

Questions?

If you have questions or need help, please:

  • Check the README.md for usage information
  • Open an issue on GitHub
  • Contact the maintainers
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