Switch from Circle CI to GitHub Actions

The testing docker image has been split up. Instead of having one image
with all supported versions of zsh installed, we now have a separate
image for each supported zsh version.

We use GitHub Action matrices to run jobs in parallel for all of the
supported versions.

We no longer need to publish images to Docker Hub. The images are just
built by CI (or developers) as needed from the Dockerfile in the repo.

.circleci/config.yml

@@ -1,15 +0,0 @@
-version: 2
-jobs:
-  build:
-    parallelism: 4
-    shell: /bin/bash --login
-    docker:
-    - image: ericfreese/zsh-autosuggestions-test:latest
-    steps:
-    - checkout
-    - run:
-        name: Running tests
-        command: |
-          for v in $(grep "^[^#]" ZSH_VERSIONS | awk "(NR + $CIRCLE_NODE_INDEX) % $CIRCLE_NODE_TOTAL == 0"); do
-            TEST_ZSH_BIN=zsh-$v make test || exit 1
-          done

.github/workflows/integration.yml

@@ -0,0 +1,51 @@
+on: [push, pull_request]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+env:
+  IMAGE_CACHE_PATH: /tmp/.image-cache
+  IMAGE_CACHE_NAME: zsh-autosuggestions-test
+jobs:
+  determine-versions:
+    runs-on: ubuntu-22.04
+    outputs:
+      versions: ${{ steps.set-versions.outputs.versions }}
+    steps:
+    - uses: actions/checkout@v3
+    - id: set-versions
+      run: |
+        echo "versions=$(
+          grep "^[^#]" ZSH_VERSIONS \
+          | sed -E 's/(^|$)/"/g' \
+          | paste -sd ',' - \
+          | sed -e 's/^/[/' -e 's/$/]/'
+        )" >> $GITHUB_OUTPUT
+  test:
+    needs: determine-versions
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        version: ${{ fromJson(needs.determine-versions.outputs.versions) }}
+    steps:
+    - uses: actions/checkout@v3
+    - name: Docker image cache
+      id: image-cache
+      uses: actions/cache@v3
+      with:
+        path: ${{ env.IMAGE_CACHE_PATH }}
+        key: image-cache-${{ matrix.version }}-${{ hashFiles('Dockerfile', 'install_test_zsh.sh', 'Gemfile.lock') }}
+    - name: Load cached docker image if available
+      if: ${{ steps.image-cache.outputs.cache-hit }}
+      run: gunzip < $IMAGE_CACHE_PATH/$IMAGE_CACHE_NAME.tar.gz | docker load
+    - name: Build the docker image if necessary
+      if: ${{ !steps.image-cache.outputs.cache-hit }}
+      run: |
+        docker build --build-arg TEST_ZSH_VERSION=${{ matrix.version }} -t $IMAGE_CACHE_NAME .
+        mkdir -p $IMAGE_CACHE_PATH
+        docker save $IMAGE_CACHE_NAME | gzip > $IMAGE_CACHE_PATH/$IMAGE_CACHE_NAME.tar.gz
+    - name: Run the tests
+      run: |
+        docker run --rm \
+          -v $PWD:/zsh-autosuggestions \
+          $IMAGE_CACHE_NAME \
+          make test

Dockerfile

@@ -1,5 +1,8 @@
 FROM ruby:2.5.3-alpine
 
+ARG TEST_ZSH_VERSION
+RUN : "${TEST_ZSH_VERSION:?}"
+
 RUN apk add --no-cache autoconf
 RUN apk add --no-cache libtool
 RUN apk add --no-cache libcap-dev
@@ -11,10 +14,8 @@ RUN apk add --no-cache tmux
 
 WORKDIR /zsh-autosuggestions
 
-ADD ZSH_VERSIONS /zsh-autosuggestions/ZSH_VERSIONS
-ADD install_test_zsh.sh /zsh-autosuggestions/install_test_zsh.sh
+ADD install_test_zsh.sh ./
 RUN ./install_test_zsh.sh
 
-ADD Gemfile /zsh-autosuggestions/Gemfile
-ADD Gemfile.lock /zsh-autosuggestions/Gemfile.lock
+ADD Gemfile Gemfile.lock ./
 RUN bundle install

README.md

@@ -170,18 +170,16 @@ Tests are written in ruby using the [`rspec`](http://rspec.info/) framework. The
 
 Test files live in `spec/`. To run the tests, run `make test`. To run a specific test, run `TESTS=spec/some_spec.rb make test`. You can also specify a `zsh` binary to use by setting the `TEST_ZSH_BIN` environment variable (ex: `TEST_ZSH_BIN=/bin/zsh make test`).
 
-A docker image for testing is available [on docker hub](https://hub.docker.com/r/ericfreese/zsh-autosuggestions-test). It comes with ruby, the bundler dependencies, and all supported versions of zsh installed.
-
-Pull the docker image with:
+It's possible to run the tests for any supported version of zsh in a Docker image by building an image from the provided Dockerfile. To build the docker image for a specific version of zsh (where `<version>` below is substituted with the contents of a line from the [`ZSH_VERSIONS`](ZSH_VERSIONS) file), run:
 
 ```sh
-docker pull ericfreese/zsh-autosuggestions-test
+docker build --build-arg TEST_ZSH_VERSION=<version> -t zsh-autosuggestions-test .
 ```
 
-To run the tests for a specific version of zsh (where `<version>` below is substituted with the contents of a line from the [`ZSH_VERSIONS`](ZSH_VERSIONS) file):
+After building the image, run the tests via:
 
 ```sh
-docker run -it -e TEST_ZSH_BIN=zsh-<version> -v $PWD:/zsh-autosuggestions zsh-autosuggestions-test make test
+docker run -it -v $PWD:/zsh-autosuggestions zsh-autosuggestions-test make test
 ```
 
 

ZSH_VERSIONS

@@ -1,9 +1,5 @@
 # Zsh releases to run tests against
 # See https://github.com/zsh-users/zsh/releases
-#
-# When modifying this file, rebuild and push docker image:
-#   $ docker build -t ericfreese/zsh-autosuggestions-test .
-#   $ docker push ericfreese/zsh-autosuggestions-test
 4.3.11
 5.0.2
 5.0.8

install_test_zsh.sh

@@ -2,25 +2,22 @@
 
 set -ex
 
-for v in $(grep "^[^#]" ZSH_VERSIONS); do
-  mkdir zsh-$v
-  cd zsh-$v
+mkdir zsh-build
+cd zsh-build
 
-  curl -L https://api.github.com/repos/zsh-users/zsh/tarball/zsh-$v | tar xz --strip=1
+curl -L https://api.github.com/repos/zsh-users/zsh/tarball/zsh-$TEST_ZSH_VERSION | tar xz --strip=1
 
-  ./Util/preconfig
-  ./configure --enable-pcre \
-              --enable-cap \
-              --enable-multibyte \
-              --with-term-lib='ncursesw tinfo' \
-              --with-tcsetpgrp \
-              --program-suffix="-$v"
+./Util/preconfig
+./configure --enable-pcre \
+            --enable-cap \
+            --enable-multibyte \
+            --with-term-lib='ncursesw tinfo' \
+            --with-tcsetpgrp
 
-  make install.bin
-  make install.modules
-  make install.fns
+make install.bin
+make install.modules
+make install.fns
 
-  cd ..
+cd ..
 
-  rm -rf zsh-$v
-done
+rm -rf zsh-build