Merge pull request #69 from actions/master

Update releases/v1 with changes from master

.github/workflows/lint-yaml.yml

@@ -0,0 +1,12 @@
+name: Lint YAML
+on: [pull_request]
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Lint action.yml
+      uses: ibiqlik/action-yamllint@master
+      with:
+        file_or_dir: action.yml
+        config_file: yaml-lint-config.yml

.github/workflows/workflow.yml

@@ -1,5 +1,5 @@
 name: Main workflow
-on: [push]
+on: [push, pull_request]
 jobs:
   run:
     name: Run
@@ -14,7 +14,7 @@ jobs:
     - name: Set Node.js 10.x
       uses: actions/setup-node@master
       with:
-        version: 10.x
+        node-version: 10.x
 
     - name: npm install
       run: npm install

.gitignore

@@ -1,7 +1,10 @@
-# Explicitly not ignoring node_modules so that they are included in package downloaded by runner
-!node_modules/
+# Ignore node_modules, ncc is used to compile nodejs modules into a single file in the releases branch
+node_modules/
 __tests__/runner/*
 
+# Ignore js files that are transpiled from ts files in src/
+lib/
+
 # Rest of the file pulled from https://github.com/github/gitignore/blob/master/Node.gitignore
 # Logs
 logs

README.md

@@ -16,25 +16,25 @@ See [action.yml](action.yml)
 Basic:
 ```yaml
 steps:
-- uses: actions/checkout@master
+- uses: actions/checkout@v2
 - uses: actions/setup-python@v1
   with:
-    python-version: '3.x' # Version range or exact version of a Python version to use, using semvers version range syntax.
-    architecture: 'x64' # (x64 or x86)
+    python-version: '3.x' # Version range or exact version of a Python version to use, using SemVer's version range syntax
+    architecture: 'x64' # optional x64 or x86. Defaults to x64 if not specified
 - run: python my_script.py
 ```
 
 Matrix Testing:
 ```yaml
 jobs:
   build:
-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         python-version: [ '2.x', '3.x', 'pypy2', 'pypy3' ]
     name: Python ${{ matrix.python-version }} sample
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v2
       - name: Setup python
         uses: actions/setup-python@v1
         with:
@@ -43,6 +43,73 @@ jobs:
       - run: python my_script.py
 ```
 
+Exclude a specific Python version:
+```yaml
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: [2.7, 3.6, 3.7, 3.8, pypy2, pypy3]
+        exclude:
+          - os: macos-latest
+            python-version: 3.8
+          - os: windows-latest
+            python-version: 3.6
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Display Python version
+        run: python -c "import sys; print(sys.version)"
+```
+
+# Getting started with Python + Actions
+
+Check out our detailed guide on using [Python with GitHub Actions](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/using-python-with-github-actions).
+
+# Hosted Tool Cache
+
+GitHub hosted runners have a tools cache that comes with Python + PyPy already installed. This tools cache helps speed up runs and tool setup by not requiring any new downloads. There is an environment variable called `RUNNER_TOOL_CACHE` on each runner that describes the location of this tools cache and there is where you will find Python and PyPy installed. `setup-python` works by taking a specific version of Python or PyPy in this tools cache and adding it to PATH.
+
+|| Location |
+|------|-------|
+|**Tool Cache Directory** |`RUNNER_TOOL_CACHE`|
+|**Python Tool Cache**|`RUNNER_TOOL_CACHE/Python/*`|
+|**PyPy Tool Cache**|`RUNNER_TOOL_CACHE/PyPy/*`|
+
+GitHub virtual environments are setup in [actions/virtual-environments](https://github.com/actions/virtual-environments). During the setup, the available versions of Python and PyPy are automatically downloaded, setup and documented.
+- [Tools cache setup for Ubuntu](https://github.com/actions/virtual-environments/blob/master/images/linux/scripts/installers/hosted-tool-cache.sh)
+- [Tools cache setup for Windows](https://github.com/actions/virtual-environments/blob/master/images/win/scripts/Installers/Download-ToolCache.ps1)
+
+# Using `setup-python` with a self hosted runner
+
+If you would like to use `setup-python` on a self-hosted runner, you will need to download all versions of Python & PyPy that you would like and setup a similar tools cache locally for your runner.
+
+- Create an global environment variable called `AGENT_TOOLSDIRECTORY` that will point to the root directory of where you want the tools installed. The env variable is preferrably global as it must be set in the shell that will install the tools cache, along with the shell that the runner will be using.
+    - This env variable is used internally by the runner to set the `RUNNER_TOOL_CACHE` env variable
+    - Example for Administrator Powershell: `[System.Environment]::SetEnvironmentVariable("AGENT_TOOLSDIRECTORY", "C:\hostedtoolcache\windows", [System.EnvironmentVariableTarget]::Machine)` (restart the shell afterwards)
+-  Download the appropriate NPM packages from the [GitHub Actions NPM registry](https://github.com/orgs/actions/packages)
+    - Make sure to have `npm` installed, and then [configure npm for use with GitHub packages](https://help.github.com/en/packages/using-github-packages-with-your-projects-ecosystem/configuring-npm-for-use-with-github-packages#authenticating-to-github-package-registry)
+    - Create an empty npm project for easier installation (`npm init`) in the tools cache directory. You can delete `package.json`, `package.lock.json` and `node_modules` after all tools get installed
+    - Before downloading a specific package, create an empty folder for the version of Python/PyPY that is being installed. If downloading Python 3.6.8 for example, create `C:\hostedtoolcache\windows\Python\3.6.8`
+    - Once configured, download a specific package by calling `npm install`. Note (if downloading a PyPy package on Windows, you will need 7zip installed along with `7z.exe` added to your PATH)
+- Each NPM package has multiple versions that determine the version of Python or PyPy that should be installed. 
+    - `npm install @actions/[email protected]` for example installs Python 3.7.6 while `npm install @actions/[email protected]` installs Python 3.6.8
+    - You can browse and find all available versions of a package by searching the GitHub Actions NPM registry
+![image](https://user-images.githubusercontent.com/16109154/76194005-87aeb400-61e5-11ea-9b21-ef9111247f84.png)
+
+# Using Python without `setup-python`
+
+`setup-python` helps keep your dependencies explicit and ensures consistent behavior between different runners. If you use `python` in a shell on a GitHub hosted runner without `setup-python` it will default to whatever is in PATH. The default version of Python in PATH vary between runners and can change unexpectedly so we recommend you always use `setup-python`.
+
+# Available versions of Python
+
+For detailed information regarding the available versions of Python that are installed see [Software installed on GitHub-hosted runners](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/software-installed-on-github-hosted-runners)
+
 # License
 
 The scripts and documentation in this project are released under the [MIT License](LICENSE)

action.yml

@@ -1,13 +1,20 @@
+---
 name: 'Setup Python'
-description: 'Set up a specific version of Python and add the command-line tools to the PATH'
+description: 'Set up a specific version of Python and add the command-line tools to the PATH.'
 author: 'GitHub'
 inputs:
   python-version:
-    description: 'Version range or exact version of a Python version to use, using semvers version range syntax.'
+    description: "Version range or exact version of a Python version to use, using SemVer's version range syntax."
     default: '3.x'
   architecture:
     description: 'The target architecture (x86, x64) of the Python interpreter.'
     default: 'x64'
+outputs:
+  python-version:
+    description: "The installed python version. Useful when given a version range as input."
 runs:
   using: 'node12'
-  main: 'lib/setup-python.js'
+  main: 'dist/index.js'
+branding:
+  icon: 'code'
+  color: 'yellow'