chore: build packages before installing deps for examples

Author: achingbrain

.travis.yml

@@ -229,12 +229,13 @@ jobs:
     - stage: test
       name: examples
       script:
-        - npx json -I -f ./lerna.json -e "this.packages.push('examples/*')"
-        - npx json -I -f ./lerna.json -e "this.command.bootstrap.nohoist = ['ipfs-css', 'tachyons']"
-        - npm run reset
-        - npm install
-        - npm run build -- --scope={ipfs-core,ipfs,ipfs-http-client,ipfs-message-port-*}
-        - npm run test -- --scope=example* --concurrency=1
+        # Travis lets scripts continue even if previous steps fail: https://github.com/travis-ci/travis-ci/issues/1066
+        - npm run build -- --scope={ipfs-core,ipfs,ipfs-http-client,ipfs-message-port-*} &&
+          rm -rf node_modules packages/*/node_modules &&
+          npx json -I -f ./lerna.json -e "this.packages.push('examples/*')" &&
+          npx json -I -f ./lerna.json -e "this.command.bootstrap.nohoist = ['ipfs-css', 'tachyons']" &&
+          npm install &&
+          npm run test -- --scope=example* --concurrency=1
 
     - stage: release-rc
       # only run on changes to master