initial commit

.github/workflows/deploy.yml

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+name: deploy
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+jobs:
+  build:
+    name: pr
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions/setup-node@v1
+    - uses: actions/setup-python@v1
+    - run: pip install virtualenv
+    - run: make
+    - run: make push
+      env:
+        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

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+/dist
+/node_modules
+/venv

.pre-commit-config.yaml

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+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.1.0
+    hooks:
+    -   id: check-json
+    -   id: check-yaml
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+-   repo: https://github.com/pre-commit/mirrors-eslint
+    rev: v7.0.0
+    hooks:
+    -   id: eslint
+        args: [--fix]

LICENSE

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+Copyright (c) 2020 Anthony Sottile
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Makefile

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+.PHONY: all
+all: dist/index.js
+
+venv: Makefile
+	rm -rf venv
+	virtualenv venv -ppython3
+	venv/bin/pip install markdown-to-presentation
+
+node_modules: package.json
+	npm install --silent
+	test -d node_modules
+	touch node_modules
+
+dist/index.js: index.js node_modules
+	node_modules/.bin/webpack --config webpack.config.js
+	# terrible hack to prevent lookup of `navigator`
+	# if someone knows the correct way to use webpack, PRs welcome!
+	sed -i 's/\bnavigator\b/({})/g' $@
+
+.PHONY: push
+push: venv
+	venv/bin/markdown-to-presentation push \
+		--pages-branch release \
+		README.md LICENSE action.yml dist/index.js

README.md

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+[![Build Status](https://github.com/deadsnakes/action/workflows/deploy/badge.svg)](https://github.com/deadsnakes/action/actions)
+
+deadsnakes/action
+=================
+
+a GitHub action to install (pre-release) pythons from [deadsnakes]
+
+[deadsnakes]: https://github.com/deadsnakes
+
+### using this action
+
+To use this action, add it adjacent to `setup-python` and opt into it
+conditionally.  Here's an example which uses `python-version` as a matrix.
+
+```yaml
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8, 3.9-dev]
+    name: main
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        if: matrix.python-version != '3.9-dev'
+        with:
+          python-version: ${{ matrix.python-version }}
+      - uses: deadsnakes/[email protected]
+        if: matrix.python-version == '3.9-dev'
+        with:
+          python-version: ${{ matrix.python-version }}
+      - run: python --version --version && which python
+```

action.yml

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+name: deadsnakes
+description: install (pre-release) pythons from deadsnakes
+inputs:
+  python-version:
+    description: python version to use, such as '3.9'
+    required: true
+runs:
+  using: node12
+  main: dist/index.js

index.js

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+const os = require('os');
+const path = require('path');
+const core = require('@actions/core');
+const exec = require('@actions/exec');
+
+async function main() {
+    let ppa, version = core.getInput('python-version');
+    const versionF = parseFloat(version);
+
+    if (version.endsWith('-dev')) {
+        version = version.replace(/-dev$/, '');
+        ppa = 'ppa:deadsnakes/nightly';
+    } else {
+        ppa = 'ppa:deadsnakes/ppa';
+    }
+
+    const py = `python${version}`;
+
+    // TODO: this is specific to bionic, when github actions switches to
+    // focal this will need to be updated!
+    let packages = [`${py}-dev`, `${py}-venv`];
+    if (versionF >= 3.9) {
+        packages.push(`${py}-distutils`);
+    } else {
+        packages.push('python3-distutils');
+    }
+
+    await core.group(`set up deadsnakes and install ${py}`, async () => {
+        await exec.exec('sudo', ['add-apt-repository', ppa]);
+        await exec.exec(
+            'sudo',
+            [
+                'apt-get', 'install', '-y', '--no-install-recommends',
+                ...packages,
+            ],
+        );
+    });
+
+    await core.group(`set up ${py} environment`, async () => {
+        const envdir = path.join(os.homedir(), `venv-${version}`);
+        await exec.exec(py, ['-mvenv', envdir]);
+        core.addPath(path.join(envdir, 'bin'));
+        const packages = ['pip', 'setuptools', 'wheel'];
+        await exec.exec('pip', ['install', '--upgrade', ...packages]);
+    });
+}
+
+main().catch((e) => core.setFailed(e.message));