feat: travis-ci integration

scripts/travis/install.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+set -e
+
+AVAILABLE_DART_VERSION=$(curl "https://storage.googleapis.com/dart-archive/channels/$CHANNEL/release/latest/VERSION" | python -c \
+    'import sys, json; print(json.loads(sys.stdin.read())["version"])')
+
+echo Fetch Dart channel: $CHANNEL
+
+SVN_REVISION=latest
+# TODO(chirayu): Remove this once issue 20896 is fixed.
+# Dart 1.7.0-dev.1.0 and 1.7.0-dev.2.0 are both broken so use version
+# 1.7.0-dev.0.1 instead.
+if [[ "$AVAILABLE_DART_VERSION" == "1.7.0-dev.2.0" ]]; then
+  SVN_REVISION=39661  # Use version 1.7.0-dev.0.1
+fi
+
+URL_PREFIX=https://storage.googleapis.com/dart-archive/channels/$CHANNEL/release/$SVN_REVISION
+DART_SDK_URL=$URL_PREFIX/sdk/dartsdk-linux-x64-release.zip
+DARTIUM_URL=$URL_PREFIX/dartium/dartium-linux-x64-release.zip
+
+download_and_unzip() {
+  ZIPFILE=${1/*\//}
+  curl -O -L $1 && unzip -q $ZIPFILE && rm $ZIPFILE
+}
+
+# TODO: do these downloads in parallel
+download_and_unzip $DART_SDK_URL
+download_and_unzip $DARTIUM_URL
+
+echo Fetched new dart version $(<dart-sdk/version)
+
+if [[ -n $DARTIUM_URL ]]; then
+  mv dartium-* chromium
+fi