feat: add package validator to CI

.travis.yml

@@ -9,6 +9,7 @@ script:
  - npm run lint
  - npm run validate
  - npm run test
+ - .travis/validate-package.sh
 after_success:
  - npm run coveralls
 cache: npm

.travis/validate-package.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+# Script to validate our packed package
+
+npm pack
+tar -xzf solid-community-server-*.tgz
+pushd package
+
+# Check if our server can start at a given port
+node bin/server.js -p 8888 &
+pid=$!
+i=0
+EXITCODE=0
+until curl -s localhost:8888; do
+  sleep 1
+
+  # Try for at most 10 seconds, assume failure otherwise
+  let i++
+  if [ $i -gt 10 ]; then
+    echo "Server start timeout"
+    echo "  Server may have failed to start, or is running at an unexpected port."
+    kill -9 $pid
+    EXITCODE=1
+    break;
+  fi
+done > /dev/null
+kill -9 $pid
+
+popd
+rm -r package
+rm solid-community-server-*.tgz
+exit $EXITCODE