fixup! Add a build definition for Azure DevOps

Let's split the Windows phase into multiple, logical tasks so that we
can quickly determine whether the build failed, or the test suite, or
whether there was a problem with initializing the SDK.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

azure-pipelines.yml

@@ -175,6 +175,12 @@ phases:
          net use s: \\gitfileshare.file.core.windows.net\test-cache "$GITFILESHAREPWD" /user:AZURE\gitfileshare /persistent:no; c
          cmd /c mklink /d "$(Build.SourcesDirectory)\test-cache" S:\; c
        }
+    displayName: 'mount test-cache'
+    env:
+      GITFILESHAREPWD: $(gitfileshare.pwd)
+  - powershell: |
+       # Helper to check the error level of the latest command (exit with error when appropriate)
+       function c() { if (!$?) { exit(1) } }
 
        # Add build agent's MinGit to PATH
        $env:PATH = $env:AGENT_HOMEDIRECTORY +"\externals\\git\cmd;" +$env:PATH
@@ -206,6 +212,10 @@ phases:
        $sdk_path = "$(Build.SourcesDirectory)\git-sdk-64"
        init "$sdk_path" "https://dev.azure.com/git-for-windows/git-sdk-64/_git/git-sdk-64" 0
        init usr\src\build-extra https://github.com/git-for-windows/build-extra 1
+    displayName: 'initialize the Git for Windows SDK'
+  - powershell: |
+       # Helper to check the error level of the latest command (exit with error when appropriate)
+       function c() { if (!$?) { exit(1) } }
 
        cd "$(Build.SourcesDirectory)"; c
 
@@ -222,11 +232,12 @@ phases:
          save_good_tree
        "@
        c
-
+    displayName: 'build & test'
+  - powershell: |
        if ("$GITFILESHAREPWD" -ne "" -and "$GITFILESHAREPWD" -ne "`$`(gitfileshare.pwd)") {
          cmd /c rmdir "$(Build.SourcesDirectory)\test-cache"
        }
-    displayName: 'build & test'
+    displayName: 'unmount test-cache'
     env:
       GITFILESHAREPWD: $(gitfileshare.pwd)
   - task: PublishTestResults@2