Add pipeline to test against git latest, 2.34.1, 2.25.1

.github/workflows/pr.yml

@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  # Triggers the workflow on push or pull request events but only for the "main" branch
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Run tests git-latest
+      run: | 
+        alias git="docker run -ti --rm -v $(pwd):/git -v $HOME/.ssh:/root/.ssh alpine/git:latest"
+        git --version
+        verbose=true debug=true bash _tests.sh
+    - name: Run tests git-2.34.1
+      run: | 
+        alias git="docker run -ti --rm -v $(pwd):/git -v $HOME/.ssh:/root/.ssh alpine/git:2.34.1"
+        git --version
+        verbose=true debug=true bash _tests.sh
+    - name: Run tests git-2.25.1
+      run: | 
+        alias git="docker run -ti --rm -v $(pwd):/git -v $HOME/.ssh:/root/.ssh alpine/git:2.25.1"
+        git --version
+        verbose=true debug=true bash _tests.sh