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JavaScript walk through update (#107)
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* update walkthrough

* review feedback
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bryanmacfarlane authored Sep 4, 2019
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4 changes: 2 additions & 2 deletions README.md
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Expand Up @@ -27,9 +27,9 @@ The toolkit provides five separate packages. See the docs for each action.

Actions are units of work which can either run in a container or on the host machine.

[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.
[Choosing an action type](docs/action-types.md): Outlines the differences and why you would want to create a JavaScript or a container based action.

[JavaScript Action Walkthrough](docs/javascript-action.md): A full walkthrough creating an action using the toolkit along with TypeScript and Jest for unit testing. It also covers a branching strategy for versioning and safely testing and releasing an action.
[JavaScript Action Walkthrough using a Template](docs/javascript-action.md): A full walkthrough creating an action using the toolkit along with TypeScript for compile time support and Jest for unit testing. It also covers a branching strategy for versioning and safely testing and releasing an action.

[Docker Action Walkthrough](docs/container-action.md): Create an action that is delivered as a container and run with docker.

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6 changes: 6 additions & 0 deletions docs/action-versioning.md
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Expand Up @@ -41,3 +41,9 @@ git push origin v1
5. **Compatibility Breaks**: introduce a new major version branch (releases/v2) and tag (v2) if changes will break existing workflows. For example, changing inputs.

See [Git-Basics-Tagging](https://git-scm.com/book/en/v2/Git-Basics-Tagging)

# Sample Workflow

This illustrates one possible versioning workflow which the walk through covered.

![versioning](assets/action-releases.png)
1 change: 1 addition & 0 deletions docs/assets/action-releases.drawio
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62 changes: 32 additions & 30 deletions docs/javascript-action.md
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Expand Up @@ -6,57 +6,55 @@ The [javascript-template](https://github.com/actions/javascript-template) repo c

Navigate to https://github.com/actions/javascript-template

Click on `Use this template` to create the repo for your action.
Click on `Use this template` to create the repo for your action. Provide a name such as `myaction` (used in rest of walk through).

![template](assets/node12-template.png)

Complete creating your repo and clone the repo.
# Clone and Update

> NOTE: The location of the repo will be how users will reference your action in their workflow file with the using keyword.
e.g. To use https://github.com/actions/setup-node, user's will author:

```yaml
steps:
uses: actions/setup-node@master
```bash
$ git clone <repolocation>
$ cd myaction
```

Update the `author` element in the package.json file.

# Dev Workflow

The workflow below describes one possible workflow with a branching strategy. Others exist.

> Key Point: the branch that users reference in their workflow files should reference an action that has **only** the production dependencies.
> Key Point: the branch that users reference in their workflow files should reference an action from a distribution branch that **only** has the production dependencies.
The workflow below describes a strategy where you code in master (with node_modules ignored) with a v1 branch users reference and contains the product references. Actions are self contained referenced on the github graph of repos.
The workflow below describes a strategy where you code in master (with node_modules ignored) with a distribution releases/v1 branch users reference via a tag. Actions are self contained referenced from the github graph of repos, downloaded by the runner and run intact at runtime.

## Install Dependencies

After creating a repo from the template and cloning it, you will be in master. The command below will install the toolkit, other dependencies and dev dependencies
After creating a repo from the template and cloning it, you will be in master. The command below will install the toolkit, other dependencies and dev dependencies. node_modules are ignored in the coding master branch.

```bash
$ npm install
```

## Define Metadata

Your action has a name and a description. Update the author.

Create inputs that your unit of work will need. These will be what workflow authors set with the `with:` keyword.
Your action has a name and a description. Update all fields .

```yaml
name: 'My new action'
description: 'A test action'
author: 'GitHub'
name: 'Hello'
description: 'Outputs Hello to a named input'
author: 'me'
inputs:
myInput:
description: 'Input to use'
default: 'world'
name:
description: 'the name to say hello to'
default: 'World'
runs:
using: 'node12'
main: 'lib/main.js'

```

The `name` input will be referenced by workflow authors using the `with:` keyword.

Note that the action will be run with node 12 (carried by the runner) and the entry point is specified with `main:`

## Change Code and Add Tests
Expand All @@ -68,8 +66,8 @@ import * as core from '@actions/core';

async function run() {
try {
const myInput = core.getInput('myInput');
core.debug(`Hello ${myInput}!`);
const nameInput = core.getInput('name');
console.log(`Hello ${nameInput}!`);
} catch (error) {
core.setFailed(error.message);
}
Expand All @@ -78,14 +76,14 @@ async function run() {
run();
```

Modify tests in `__tests__/main.test.ts`. The template uses [jest](https://github.com/facebook/jest).
Note that tests are in `__tests__/main.test.ts`. The template uses [jest](https://github.com/facebook/jest) to get you started with unit testing.

## Build and Test

```bash
$ npm run build

> node12[email protected] build /Users/user/Projects/testnode12
> javascript[email protected] build /Users/user/Projects/myaction
> tsc

$ npm test
Expand All @@ -107,12 +105,12 @@ $ git add <whatever only files you added>
$ git commit -m "Message"
```

## Publish a v1-release Action
## Publish a releases/v1 Action

After changing some files, create a v1-release branch which we will release
After changing some files, create a releases/v1 branch which we will release

```bash
$ git checkout -b v1-release
$ git checkout -b releases/v1
```

> NOTE: We will provide tooling and an action to automate this soon.
Expand All @@ -139,7 +137,9 @@ Once the action has a self contained version in the v1-release branch, you can t

```yaml
steps:
uses: {org}/{reponame}@v1-release
uses: myorg/myaction@releases/v1
with:
name: World!
```
## Release Current Changes as v1
Expand All @@ -154,7 +154,9 @@ Users can now reference your action in their workflows with
```yaml
steps:
uses: {org}/{reponame}@v1
uses: myorg/myaction@v1
with:
name: World!
```
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