Add "run at HEAD" leg to cron job

Our nightly cron job will now run our examples tests twice. First,
the normal run will happen. Next, we'll run again but use the latest
CLI and the latest versions of all our NPM packages.

.travis.yml

@@ -1,9 +1,9 @@
 if: branch = master
 language: go
-go: 1.9
+go: 1.11
 sudo: true # give us 7.5GB and >2 bursted cores.
 git:
- depth: false
+  depth: false
 before_install:
  - git clone https://github.com/pulumi/scripts ${GOPATH}/src/github.com/pulumi/scripts
  - source ${GOPATH}/src/github.com/pulumi/scripts/ci/prepare-environment.sh
@@ -18,8 +18,12 @@ install:
  - helm repo add bitnami https://charts.bitnami.com/bitnami
 before_script:
  - ${PULUMI_SCRIPTS}/ci/ensure-dependencies
-script:
- - go test ./misc/test/... --timeout 1h -v -count=1 -short
+jobs:
+ include:
+ - script: make travis_${TRAVIS_EVENT_TYPE}
+ - stage: latest
+ if: type = cron
+ script: ${GOPATH}/src/github.com/pulumi/scripts/ci/run-at-head
 after_failure:
  - ${PULUMI_SCRIPTS}/ci/upload-failed-tests
 notifications:

Makefile

@@ -1,2 +1,18 @@
+.PHONY: ensure only_build only_test all
+
+all: only_build only_test
+
 ensure:
  cd misc/test && dep ensure -v
+
+only_build:
+
+only_test:
+ go test ./misc/test/... --timeout 1h -v -count=1 -short
+
+# The travis_* targets are entrypoints for CI.
+.PHONY: travis_cron travis_push travis_pull_request travis_api
+travis_cron: all
+travis_push: all
+travis_pull_request: all
+travis_api: all

misc/test/Gopkg.toml

@@ -1,3 +1,4 @@
 [[constraint]]
  name = "github.com/pulumi/pulumi"
  branch = "master"
+

misc/test/examples_test.go

@@ -31,10 +31,15 @@ func TestExamples(t *testing.T) {
  if !assert.NoError(t, err, "expected a valid working directory: %v", err) {
  return
  }
+ overrides, err := integration.DecodeMapString(os.Getenv("PULUMI_TEST_NODE_OVERRIDES"))
+ if !assert.NoError(t, err, "expected valid override map: %v", err) {
+ return
+ }
 
  base := integration.ProgramTestOptions{
  Tracing: "https://tracing.pulumi-engineering.com/collector/api/v1/spans",
  ExpectRefreshChanges: true,
+ Overrides: overrides,
  }
 
  examples := []integration.ProgramTestOptions{