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CONTRIBUTING.md

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Contributing

Setup

Periskop requires go, make and npm installed in your system. Once they are installed, you can install the remaining dependencies by running:

make setup-web

Make sure tests pass:

make test-api

Development

Periskop can be run in development in two different ways, either by running the API and web components separately, or together. The difference is that by running them separately the webpack dev server will be used, with support for live reloading.

Running the API:

make run-api

Running the web component:

make run-web

Periskop needs something to scrape in order to show errors in the UI. In development, a mock target returning static responses can be used for this purpose (periskop is configured to point to it by default). To run the mock server:

make run-mock-target

Now you can point your browser to http://localhost:3000

Using docker-compose

We also provide a way to run periskop using docker container and orchestrated via composition.

In the Makefile there's a section for DOCKER COMPOSE:

  • make up: Boots up the 3 containers (api, web, mock-target). Note: I may take some time until all the containers boot up and errors scraped and shown in the UI.
  • make down: Will call docker-compose down which will stop all running containers orchestrated with our docker-compose configuration
  • make logs: Shows the logs of the 3 containers

If you would like to follow the logs of any container you can do so as follows:

# Front end container - nodejs
docker-compose logs --follow web

# Back end container - golang
docker-compose logs --follow api

# The mock target. Doesn't do much other that show 1 line of code where it is serving the errors - golang
docker-compose logs --follow mock-target

All the commands that boot up containers override 2 environment variables:

  • API_HOST: This is the host of the api.
  • API_PORT: The port where the api will be listening to. It defaults to 8080.

Note: For development, we recommend running each of the components separately instead of using docker compose. This will enable hot reload for web changes and allow to compile components independently.

Testing

Running the API tests:

make test-api

Running the API linter:

make lint-api

Contribution Policy

  1. Fork the project and implement your changes in a separate branch. Make sure tests and linters pass.
  2. Open a PR from your branch to periskop. Make sure the description is concise and clear.
  3. Wait for an approval from 2 core developers. Make sure the build is green.
  4. After that, one of the core developers will merge your changes into the main branch.
  5. Thank you so much for contributing!