Create Actions Walkthrough (#36)

* starting walkthrough docs

* versioning
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Bryan MacFarlane
2019-08-01 11:26:17 -04:00
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## Toolkit
The toolkit provides a set of packages to make creating actions easier and drive consistency.
## Packages
The toolkit provides four separate packages. Since actions are run by pulling actions from the github graph, dependencies including the packages are vendored into your action.
| Package | Description |
| ------- | ----------- |
| [@actions/core](packages/core) | Core functions for setting results, logging, secrets and environment variables |
| [@actions/core](packages/core) | Core functions for getting inputs, setting outputs, setting results, logging, secrets and environment variables |
| [@actions/exec](packages/exec) | Functions necessary for running tools on the command line |
| [@actions/io](packages/io) | Core functions for CLI filesystem scenarios |
| [@actions/tool-cache](packages/tool-cache) | Functions necessary for downloading and caching tools |
## Development
## Creating an Action with the Toolkit
This repository uses [Lerna](https://github.com/lerna/lerna#readme) to manage multiple packages. Read the documentation there to begin contributing.
Actions are units of work which can either run in a container or on the host machine.
Note that before a PR will be accepted, you must ensure:
- all tests are passing
- `npm run format` reports no issues
- `npm run lint` reports no issues
[Choosing an action type](docs/action-types.md): Outlines the differences and why you would want to create a host or a container based action.
### Useful Scripts
[JavaScript Action Walthrough](docs/node12-action.md): Create an action which runs on the host using the toolkit
- `npm run bootstrap` This runs `lerna bootstrap` which will install dependencies in this repository's packages and cross-link packages where necessary.
- `npm run build` This compiles TypeScript code in each package (this is especially important if one package relies on changes in another when you're running tests). This is just an alias for `lerna run tsc`.
- `npm run format` This checks that formatting has been applied with Prettier.
- `npm test` This runs all Jest tests in all packages in this repository.
- If you need to run tests for only one package, you can pass normal Jest CLI options:
```console
$ npm test -- packages/toolkit
```
- `npm run create-package [name]` This runs a script that automates a couple of parts of creating a new package.
[Docker Action Walkthrough](docs/container-action.md): Create an action that is delivered as a container and run with docker.
### Creating a Package
[Docker Action Walkthrough with Octokit](docs/container-action-toolkit.md): Create an action that is delivered as a container which uses the toolkit. This example uses the GitHub context to construct an Octokit client.
1. In a new branch, create a new Lerna package:
[Versioning](docs/action-versioning.md): Recommendations on versioning, releases and tagging your action.
```console
$ npm run create-package new-package
```
## Contributing
This will ask you some questions about the new package. Start with `0.0.0` as the first version (look generally at some of the other packages for how the package.json is structured).
2. Add `tsc` script to the new package's package.json file:
```json
"scripts": {
"tsc": "tsc"
}
```
3. Start developing 😄 and open a pull request.
We welcome contributions. See [how to contribute](docs/contribute.md).