Add test install workflow

.github/workflows/install_puppet.yaml

@@ -0,0 +1,31 @@
+---
+name: Install Puppet
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  install-puppet:
+    name: ${{ matrix.collection }} / ${{ matrix.os.name }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        collection: [ puppet6, puppet7, puppet6-nightly, puppet7-nightly]
+        os: [
+          # { image: "CentOS 6", image: "litmusimage/centos:6" },
+          # { image: "CentOS 7", image: "litmusimage/centos:7" },
+          { image: "CentOS 8", image: "litmusimage/centos:8" },
+          # { image: "Debian 9", image: "litmusimage/debian:9" },
+          { image: "Debian 10", image: "litmusimage/debian:10" },
+          # { image: "Debian 11", image: "litmusimage/debian:11" },
+          # { image: "Ubuntu 16.04", image: "litmusimage/ubuntu:16.04" },
+          { image: "Ubuntu 18.04", image: "litmusimage/ubuntu:18.04" },
+          # { image: "Ubuntu 20.04", image: "litmusimage/ubuntu:20.04" },
+        ]
+    image:
+      image: ${{ matrix.os.image }}
+    steps:
+      - name: Install puppet-agent from ${{ matrix.collection }} collection
+        run: bash -x test_install.sh -c ${{ matrix.collection }}

test_install.sh

@@ -0,0 +1,67 @@
+#!/usr/bin/env bash
+
+INSTALL_OPTIONS=( "$@" )
+PUPPET_BIN=/opt/puppetlabs/bin/puppet
+
+beginswith() { case $2 in "$1"*) true;; *) false;; esac; }
+
+# Check whether a command exists - returns 0 if it does, 1 if it does not
+exists() {
+  if command -v "$1" >/dev/null 2>&1
+  then
+    return 0
+  else
+    return 1
+  fi
+}
+
+while [[ "$#" -gt 0 ]]; do
+  case $1 in
+      -v|--version) EXPECTED_VERSION="$2"; shift ;;
+      -c|--collection) EXPECTED_COLLECTION="$2"; shift;
+        case $EXPECTED_COLLECTION in
+          puppet|puppet-nightly) EXPECTED_VERSION="7." ;;
+          puppet6|puppet6-nightly) EXPECTED_VERSION="6." ;;
+          puppet7|puppet7-nightly) EXPECTED_VERSION="7." ;;
+        esac
+        ;;
+      --cleanup) EXPECT_CLEANUP=true; shift ;;
+      *) echo "Unknown parameter passed: $1"; usage; exit 1 ;;
+  esac
+  shift
+done
+
+curl -sSL https://raw.githubusercontent.com/puppetlabs/install-puppet/main/install.sh | bash -s -- "${INSTALL_OPTIONS[@]}"
+
+if [ -n "$EXPECTED_VERSION" ]; then
+  if ! exists $PUPPET_BIN; then
+    echo "ERROR: puppet executable not found under $(dirname $PUPPET_BIN)"
+    exit 1
+  fi
+
+  echo "INFO: running $PUPPET_BIN --version"
+
+  ACTUAL_VERSION=$($PUPPET_BIN --version)
+
+  if ! beginswith "$EXPECTED_VERSION" "$ACTUAL_VERSION"; then
+    echo "ERROR: expected version to begin with $EXPECTED_VERSION but got $ACTUAL_VERSION"
+    exit 1
+  fi
+fi
+
+if [[ $EXPECT_CLEANUP == true ]]; then
+  if exists rpm; then
+    if rpm -q "${EXPECTED_COLLECTION}-release"; then
+      echo "ERROR: cleanup requested but $EXPECTED_COLLECTION-release repo was not removed"
+      exit 1
+    fi
+  elif exists dpkg; then
+    if dpkg -l "${EXPECTED_COLLECTION}-release"; then
+      echo "ERROR: cleanup requested but $EXPECTED_COLLECTION-release repo was not removed/purged"
+      exit 1
+    fi
+  else
+    echo "INFO: no rpm/dpkg found; don't know how to cleanup repos"
+    exit 1
+  fi
+fi