First commit

Author: acelaya

CHANGELOG.md

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+# CHANGELOG
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org).
+
+## [1.0.0] - 2021-08-29
+### Added
+* First release
+
+### Changed
+* *Nothing*
+
+### Deprecated
+* *Nothing*
+
+### Removed
+* *Nothing*
+
+### Fixed
+* *Nothing*

README.md

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-# deploy-preview-action
-A github action to deploy preview environments for static apps using GitHub Pages
+# Deploy Preview Action
+
+A GitHub action to deploy preview environments for static apps using GitHub Pages.
+
+## How it works
+
+This action expects you to checkout and build your static assets. After that, it will run next steps:
+
+* Generate a unique slug from the branch name plus current date. For example, if your branch is `Update-landing-page`, it will generate a slug like `2021-05-08-update-landing-page`.
+* Publish the contents from the folder of your choice into a branch where you should have configured GitHub Pages to be served.
+* Use the slug generated in first step to create a sub-folder with your contents. That way, if your repository is `my-org/my-repo`, you will be able to access the preview env in https://my-org.github.io/my-repo/2021-05-08-update-landing-page
+* If you run this action during `pull_request` or `pull_request_target` events: publish a comment after the preview env is ready, with the URL from previous step.
+
+## Usage
+
+```yaml
+name: Build and Deploy
+
+on:
+  pull_request: null
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Install and Build
+        run: |
+          npm install
+          npm run build
+
+      - name: Deploy
+        uses: shlinkio/deploy-preview-action@v1
+        with:
+          branch: gh-pages # The branch from where the GitHub Pages are served (defaults to preview-env)
+          folder: build # The folder where the artifacts to publish are (defaults to the project root)
+```
+
+## Configuration
+
+| Param    | Description                                                                              | Required |
+|----------|------------------------------------------------------------------------------------------|----------|
+| `branch` | The name of the branch where GitHub Pages are getting served. Defaults to `preview-env`. | No       |
+| `folder` | The folder including the static contents to deploy. Defaults to the project root.        | No       |
+
+## Considerations
+
+* Every deployment generates a sub-folder. This action does not take care of deleting them.
+* Some static pages or statically generated pages expect to be served from the root of the domain. This action deploys on a sub-folder, so you may need extra steps to ensure your app works once deployed.

action.yml

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+name: Deploy preview
+description: Deploy preview environments for static apps using GitHub Pages
+
+inputs:
+  branch:
+    description: The branch from where the GitHub Pages are served (defaults to preview-env)
+    required: true
+    default: 'preview-env'
+  folder:
+    description: The folder where the artifacts to publish are (defaults to the project root)
+    required: true
+    default: '.'
+
+runs:
+  using: composite
+  steps:
+    - name: Generate slug
+      id: generate_slug
+      run: echo "##[set-output name=slug;]$(echo ${GITHUB_HEAD_REF#refs/heads/} | sed -r 's/[~\^]+//g' | sed -r 's/[^a-zA-Z0-9]+/-/g' | sed -r 's/^-+\|-+$//g' | tr A-Z a-z)"
+      shell: bash
+    - name: Determine base URL
+      id: determine_base_url
+      run: echo "##[set-output name=base_url;]$(echo $GITHUB_REPOSITORY | sed 's/\//.github.io\//')"
+      shell: bash
+    - name: Deploy
+      uses: JamesIves/github-pages-deploy-action@4.1.1
+      with:
+        branch: ${{ inputs.branch }}
+        folder: ${{ inputs.folder }}
+        target-folder: ${{ steps.generate_slug.outputs.slug }}
+    - name: Publish env
+      uses: marocchino/sticky-pull-request-comment@v2
+      with:
+        header: Preview environment
+        message: |
+          ## Preview environment
+          https://${{ steps.determine_base_url.outputs.base_url }}/${{ steps.generate_slug.outputs.slug }}/