Merge pull request #318 from dart-lang/travis-runner2

Speed Travis CI up with some caching & faster fails

pkg/dev_compiler/.travis.yml

@@ -1,18 +1,19 @@
 language: dart
-sudo: false
 dart:
   - dev
+cache:
+  directories:
+    - $HOME/.npm
+    - $HOME/.nvm
+    - $HOME/.pub-cache/hosted
+    - $HOME/.chrome/canary
+    - node_modules
 before_install:
   - pub global activate dart_coveralls
-  - export CHROME_URL=https://storage.googleapis.com/chromium-browser-snapshots/Linux_x64
-  - export CHROME_REV=$(curl -s ${CHROME_URL}/LAST_CHANGE)
-  - curl ${CHROME_URL}/${CHROME_REV}/chrome-linux.zip --create-dirs -o out/chrome-linux.zip
-  - unzip out/chrome-linux.zip -d out
-  - export CHROME_CANARY_BIN=$PWD/out/chrome-linux/chrome
+  - export CHROME_CANARY_BIN=`./tool/get_chrome_canary.sh`
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
 before_script:
   - npm install
 script:
-  - ./tool/presubmit.sh
-  - ./tool/coverage.sh
+  - ./tool/presubmit.sh && ./tool/coverage.sh

pkg/dev_compiler/tool/get_chrome_canary.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+#
+# Ensures the latest Chrome Canary is available, downloading it
+# if necessary.
+#
+# Directory ~/.chrome/canary can safely be cached as the existing
+# version will be checked before reusing a previously downloaded
+# canary.
+#
+
+set -eu
+
+readonly CHROME_URL=https://storage.googleapis.com/chromium-browser-snapshots/Linux_x64
+readonly CHROME_REV=$(curl -s ${CHROME_URL}/LAST_CHANGE)
+
+readonly CHROME_CANARY_DIR=$HOME/.chrome/canary
+readonly CHROME_CANARY_BIN=$CHROME_CANARY_DIR/chrome-linux/chrome
+readonly CHROME_CANARY_REV_FILE=$CHROME_CANARY_DIR/VERSION
+
+function getCanary() {
+  local existing_version=""
+  if [[ -f $CHROME_CANARY_REV_FILE && -x $CHROME_CANARY_BIN ]]; then
+    existing_version=`cat $CHROME_CANARY_REV_FILE`
+    echo "Found cached Chrome Canary version: $existing_version"
+  fi
+
+  if [[ "$existing_version" != "$CHROME_REV" ]]; then
+    echo "Downloading Chrome Canary version: $CHROME_REV"
+    rm -fR $CHROME_CANARY_DIR
+    mkdir -p $CHROME_CANARY_DIR
+
+    local file=chrome-linux.zip
+    curl ${CHROME_URL}/${CHROME_REV}/$file -o $file
+    unzip $file -d $CHROME_CANARY_DIR
+    rm $file
+    echo $CHROME_REV > $CHROME_CANARY_REV_FILE
+  fi
+}
+
+getCanary >&2
+
+echo $CHROME_CANARY_BIN