misc: add lhci dogfood script to travis (#9677)

.travis.yml

@@ -39,6 +39,7 @@ script:
   - yarn test-viewer
   - yarn test-lantern
   - yarn i18n:checks
+  - yarn dogfood-lhci
 before_cache:
   # nyc, jest and other projects store files in here. They mess up the travis build cache.
   - rm -rf ./node_modules/.cache/

lighthouse-core/scripts/dogfood-lhci.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+
+set -euox pipefail
+
+# This script requires LHCI_CANARY_SERVER_URL and LHCI_CANARY_SERVER_TOKEN variables to be set.
+
+if [[ -z "$LHCI_CANARY_SERVER_TOKEN" ]]; then
+  echo "No server token available, skipping.";
+  exit 0;
+fi
+
+if [[ "$TRAVIS_NODE_VERSION" != "10" ]]; then
+  echo "Not running dogfood script on node versions other than 10";
+  exit 0;
+fi
+
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+LH_ROOT_DIR="$SCRIPT_DIR/../.."
+
+# Testing lhci takes time and the server ain't massive, we'll only run the tests if we touched files that affect the report.
+CHANGED_FILES=""
+if [[ "$CI" ]]; then
+  CHANGED_FILES=$(git --no-pager diff --name-only "$TRAVIS_COMMIT_RANGE")
+else
+  CHANGED_FILES=$(git --no-pager diff --name-only master)
+fi
+
+printf "Determined the following files have been touched:\n\n$CHANGED_FILES\n\n"
+
+if ! echo "$CHANGED_FILES" | grep -E 'report|lhci' > /dev/null; then
+  echo "No report files affected, skipping lhci checks."
+  exit 0
+fi
+
+# Generate an HTML report and copy into static-server directory for serving.
+yarn now-build
+cp ./dist/now/english/index.html ./lighthouse-cli/test/fixtures/lhci.report.html
+
+# Install LHCI
+npm install -g @lhci/cli@next
+# Start up a test server.
+yarn static-server &
+# Wait for the server to start before hitting it with data.
+sleep 10
+# Collect our LHCI results.
+lhci collect --url=http://localhost:10200/lhci.report.html
+# Upload the results to our canary server.
+lhci upload --serverBaseUrl="$LHCI_CANARY_SERVER_URL" --token="$LHCI_CANARY_SERVER_TOKEN"
+
+# Kill the static server from earlier.
+kill $!

package.json

@@ -49,6 +49,7 @@
     "deploy-viewer": "yarn build-viewer --deploy",
     "now-build": "node lighthouse-core/scripts/build-report-for-autodeployment.js",
     "bundlesize": "bundlesize",
+    "dogfood-lhci": "./lighthouse-core/scripts/dogfood-lhci.sh",
     "timing-trace": "node lighthouse-core/scripts/generate-timing-trace.js",
     "changelog": "conventional-changelog --config ./build/changelog-generator/index.js --infile changelog.md --same-file",
     "type-check": "tsc -p . && tsc -p lighthouse-viewer/",