Move ci to gha (#37)

* add bazelisk

* remove unused legacy docs gen stuff

* add gha workflow

* cleanup any remaining travis stuff

.bazelversion

@@ -0,0 +1 @@
+bazelbuild/3.3.0

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+name: CI
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+jobs:
+  build-and-test:
+    runs-on: ${{ matrix.os }}
+    env:
+      USE_BAZEL_VERSION: ${{ matrix.bazel_version }}
+    strategy:
+      matrix:
+        os: [ubuntu-18.04, macos-10.15]
+        bazel_version: [bazelbuild/3.2.0, bazelbuild/3.3.0]
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+      - run: npm install -g @bazel/bazelisk
+      - run: cat .bazelrc.ci >> .bazelrc
+      - run: ./scripts/skylint.sh
+      - run: ./test/run_all_tests.sh ci
+      - run: ./scripts/gen-docs.sh && git diff --exit-code docs/
+      - run: bazel shutdown

README.md

@@ -1,8 +1,8 @@
 # Twirl Template Rules for Bazel
 
-| Travis | Doc
+| Status | Doc
 | --- | --- |
-| [![Build Status](https://api.travis-ci.com/lucidsoftware/rules_twirl.svg?branch=master)](https://travis-ci.com/lucidsoftware/rules_twirl/branches) | [Stardoc](docs/stardoc/twirl.md) |
+| [![Build Status](https://github.com/lucidsoftware/rules_twirl/workflows/CI/badge.svg)](https://github.com/lucidsoftware/rules_twirl/actions) | [Stardoc](docs/stardoc/twirl.md) |
 
 ## Overview
 `rules_twirl` compiles [Twirl](https://github.com/playframework/twirl) templates to [Scala](http://www.scala-lang.org/), so they can be used with [`bazelbuild/rules_scala`](https://github.com/bazelbuild/rules_scala) and [`higherkindness/rules_scala`](https://github.com/higherkindness/rules_scala).

tools/bazel

@@ -0,0 +1,3 @@
+#!/bin/bash -e
+exec bazelisk "$@"
+