build: add github actions CI

Adds some CI to the repository via Github actions

Author: rschmukler

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+name: CI
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  build-clj:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+      - name: Setup Java
+        uses: actions/[email protected]
+        with:
+          java-version: 15
+      - name: Setup Clojure
+        uses: DeLaGuardo/[email protected]
+        with:
+          tools-deps: latest
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        env:
+          cache-name: cache-clj
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('deps.edn') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+      - name: Run Tests
+        run: clojure -M:test

Readme.md

@@ -1,4 +1,5 @@
 # Systemic
+[![Build Status](https://img.shields.io/github/workflow/status/teknql/systemic/CI.svg)](https://github.com/teknql/systemic/actions)
 [![Clojars Project](https://img.shields.io/clojars/v/teknql/systemic.svg)](https://clojars.org/teknql/systemic)
 [![cljdoc badge](https://cljdoc.org/badge/teknql/systemic)](https://cljdoc.org/d/teknql/systemic/CURRENT)
 
@@ -170,7 +171,7 @@ the development experience.
                  :system-stop  "Error during stop"))
       (= 'example/*socket* system) ;; => true
       (println "Original exception"
-               cause) ;; 
+               cause) ;;
       )))
 
 ```