ci: Add basic CI

.github/workflows/test.yml

@@ -0,0 +1,57 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ matrix.experimental }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        emacs-version:
+          - 27.2
+          - 28.2
+          - 29.4
+          - 30.1
+        experimental: [false]
+        include:
+        - os: ubuntu-latest
+          emacs-version: snapshot
+          experimental: true
+        - os: macos-latest
+          emacs-version: snapshot
+          experimental: true
+        - os: windows-latest
+          emacs-version: snapshot
+          experimental: true
+        exclude:
+          - os: macos-latest
+            emacs-version: 27.2
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: jcs090218/setup-emacs@master
+      with:
+        version: ${{ matrix.emacs-version }}
+
+    - uses: emacs-eask/setup-eask@master
+      with:
+        version: 'snapshot'
+
+    - name: Run tests
+      run: |
+        eask package
+        eask install
+        eask compile

.gitignore

@@ -1,3 +1,6 @@
 *.elc
 /annotate-autoloads.el
 /annotate-pkg.el
+
+/.eask
+/dist

Eask

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+;; -*- mode: eask; lexical-binding: t -*-
+
+(package "annotate"
+         "2.4.1"
+         "annotate files without changing them")
+
+(website-url "https://github.com/bastibe/annotate.el")
+
+(package-file "annotate.el")
+
+(script "test" "echo \"Error: no test specified\" && exit 1")
+
+(source 'gnu)
+
+(depends-on "emacs" "27.1")
+
+(add-hook 'eask-before-compile-hook
+           (lambda ()
+             (setq byte-compile-error-on-warn t)))