plugins: Add test-headlamp-plugin-published.sh script

For testing published versions of headlamp-plugin

plugins/headlamp-plugin/test-headlamp-plugin-published.sh

+#!/bin/sh
+# Tests published @kinvolk/headlamp-plugin package.
+#
+# ./test-headlamp-plugin-published.sh 0.4.1-rc1
+#
+# Assumes being run within the plugins/headlamp-plugin folder
+
+set -e
+set -o xtrace
+
+plugin_version=$1
+if [ ! -z $1 ]; then
+    echo "Testing plugin_version:$plugin_version"
+else
+    echo ""
+    echo "plugin_version as first argument required. Example: 0.4.1-rc1"
+    echo ""
+    exit 1
+fi
+
+# To make sure there's no package.json affecting things go to
+cd /tmp
+TMPDIR=$(mktemp -d)
+echo $TMPDIR
+mkdir -p $TMPDIR
+cd $TMPDIR
+# clean up tmp folder on exit
+trap "exit 1"           HUP INT PIPE QUIT TERM
+trap 'echo Cleaning up tmp folder:"$TMPDIR" && rm -rf "$TMPDIR"' EXIT
+
+npm install @kinvolk/headlamp-plugin@$plugin_version
+
+npx @kinvolk/headlamp-plugin create headlamp-myfancy
+cd headlamp-myfancy
+
+# test headlamp-plugin build
+npm run build
+stat dist/main.js
+
+# test headlamp-plugin build folder
+cd ..
+rm -rf headlamp-myfancy
+npx @kinvolk/headlamp-plugin create headlamp-myfancy
+npx @kinvolk/headlamp-plugin build headlamp-myfancy
+stat headlamp-myfancy/dist/main.js
+
+# test extraction works
+npx @kinvolk/headlamp-plugin extract ./ .plugins
+stat .plugins/headlamp-myfancy/main.js
+
+# test format command and that default code is formatted correctly
+rm -rf headlamp-myfancy
+npx @kinvolk/headlamp-plugin create headlamp-myfancy
+cd headlamp-myfancy
+npm run format
+
+# test lint command and default code is lint free
+npm run lint 
+npm run lint-fix