Change development policy to continuous packaging

.github/CONTRIBUTING.md

@@ -1,31 +1,67 @@
-## Development
+## Development workflow
+
+### 1. Install tools
+
+#### Node.js
+
+[**npm**](https://www.npmjs.com/) is used for dependency management.
+
+Follow the installation instructions here:<br />
+https://nodejs.dev/download
+
+### 2. Install dependencies
 
 To work on the codebase you have to install all the dependencies:
 
-```sh
-# npm install
 ```
+npm install
+```
+
+### 3. Coding
+
+Now you're ready to work some [TypeScript](https://www.typescriptlang.org/) magic!
+
+Make sure to write or update tests for your work when appropriate.
+
+### 4. Format code
+
+Format the code to follow the standard style for the project:
+
+```
+npm run format
+```
+
+### 5. Run tests
 
 To run tests set the environment variable `GITHUB_TOKEN` with a valid Personal Access Token and then:
 
-```sh
-# npm run test
+```
+npm run test
 ```
 
 See the [official Github documentation][pat-docs] to learn more about Personal Access Tokens.
 
-## Release
-
-1. `npm install` to add all the dependencies, included development.
-1. `npm run build` to build the Action under the `./lib` folder.
-1. `npm run test` to see everything works as expected.
-1. `npm run pack` to package for distribution
-1. `git add src dist` to check in the code that matters.
-1. If the release will increment the major version, update the action refs in the examples in README.md
-   (e.g., `uses: arduino/arduino-lint-action@v1` -> `uses: arduino/arduino-lint-action@v2`).
-1. open a PR and request a review.
-1. After PR is merged, create a release, following the `vX.X.X` tag name convention.
-1. After the release, rebase the release branch for that major version (e.g., `v1` branch for the v1.x.x tags) on the
-   tag. If no branch exists for the release's major version, create one.
+### 6. Build
+
+It is necessary to compile the code before it can be used by GitHub Actions. Remember to run these commands before committing any code changes:
+
+```
+npm run build
+npm run pack
+```
+
+### 7. Commit
+
+Everything is now ready to make your contribution to the project, so commit it to the repository and submit a pull request.
+
+Thanks!
+
+## Release workflow
+
+Instructions for releasing a new version of the action:
+
+1. If the release will increment the major version, update the action refs in the examples in `README.md` (e.g., `uses: arduino/arduino-lint-action@v1` -> `uses: arduino/arduino-lint-action@v2`).
+1. Create a [GitHub release](https://docs.github.com/en/github/administering-a-repository/managing-releases-in-a-repository#creating-a-release), following the `vX.Y.Z` tag name convention. Make sure to follow [the SemVer specification](https://semver.org/).
+1. Rebase the release branch for that major version (e.g., `v1` branch for the `v1.x.x` tags) on the tag. If no branch exists for the release's major version, create one.
 
 [pat-docs]: https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/creating-a-personal-access-token

.github/workflows/check-packaging-ncc-typescript-npm.yml

@@ -0,0 +1,53 @@
+name: Check Packaging
+
+env:
+  # See: https://github.com/actions/setup-node/#readme
+  NODE_VERSION: 10.x
+
+on:
+  push:
+    paths:
+      - ".github/workflows/check-packaging-ncc-typescript-npm.yml"
+      - "lerna.json"
+      - "package.json"
+      - "package-lock.json"
+      - "Taskfile.ya?ml"
+      - "tsconfig.json"
+      - "**.[jt]sx?"
+  pull_request:
+    paths:
+      - ".github/workflows/check-packaging-ncc-typescript-npm.yml"
+      - "lerna.json"
+      - "package.json"
+      - "package-lock.json"
+      - "Taskfile.ya?ml"
+      - "tsconfig.json"
+      - "**.[jt]sx?"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  check-packaging:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build project
+        run: |
+          npm run-script build
+          npm run-script pack
+
+      - name: Check packaging
+        # Ignoring CR because ncc's output has a mixture of line endings, while the repository should only contain
+        # Unix-style EOL.
+        run: git diff --ignore-cr-at-eol --color --exit-code dist

.github/workflows/integration.yml

@@ -21,12 +21,6 @@ jobs:
       - name: Checkout local repository
         uses: actions/checkout@v2
 
-      - name: Build action
-        run: |
-          npm install
-          npm run build
-          npm run pack
-
       # Run the action using default values as much as possible.
       - name: Run action
         uses: ./ # Use the action from the local path.

README.md

@@ -2,6 +2,7 @@
 
 [![Tests Status](https://github.com/arduino/arduino-lint-action/workflows/Test%20Action/badge.svg)](https://github.com/arduino/arduino-lint-action/actions?workflow=Test+Action)
 [![Integration Tests Status](https://github.com/arduino/arduino-lint-action/workflows/Integration%20Tests/badge.svg)](https://github.com/arduino/arduino-lint-action/actions?workflow=Integration+Tests)
+[![Check Packaging status](https://github.com/arduino/arduino-lint-action/actions/workflows/check-packaging-ncc-typescript-npm.yml/badge.svg)](https://github.com/arduino/arduino-lint-action/actions/workflows/check-packaging-ncc-typescript-npm.yml)
 [![Spellcheck Status](https://github.com/arduino/arduino-lint-action/workflows/Spell%20Check/badge.svg)](https://github.com/arduino/arduino-lint-action/actions?workflow=Spell+Check)
 
 [GitHub Actions](https://docs.github.com/en/free-pro-team@latest/actions) action that uses