Azure: Export brew-test-bot.xml from Docker

Dockerfile.test.yml

@@ -1,7 +1,15 @@
 sut:
   build: .
-  command: "sudo -i -u linuxbrew /home/linuxbrew/.linuxbrew/bin/brew test-bot"
+  command:
+    - sh
+    - -xc
+    - |
+      sudo -E -u linuxbrew /home/linuxbrew/.linuxbrew/bin/brew test-bot
+      status=$$?
+      cp brew-test-bot.xml /tmp/test-bot/
+      exit $$status
   environment:
+    - HOME=/home/linuxbrew
     - BUILD_REASON
     - BUILD_REPOSITORY_URI
     - BUILD_SOURCEVERSION

azure-pipelines.yml

@@ -36,7 +36,10 @@ jobs:
   pool:
     vmImage: ubuntu-16.04
   steps:
-    - bash: docker-compose -f Dockerfile.test.yml run --rm -e HOMEBREW_GITHUB_API_TOKEN sut
+    - bash: docker-compose -f Dockerfile.test.yml build sut
+      displayName: Build Docker image
+
+    - bash: docker-compose -f Dockerfile.test.yml run --rm -v $(Build.ArtifactStagingDirectory):/tmp/test-bot sut
       displayName: Run brew test-bot
       env:
         HOMEBREW_GITHUB_API_TOKEN: $(github.publicApiToken)
@@ -46,4 +49,4 @@ jobs:
       condition: succeededOrFailed()
       inputs:
         testRunner: JUnit
-        testResultsFiles: brew-test-bot.xml
+        testResultsFiles: $(Build.ArtifactStagingDirectory)/brew-test-bot.xml