Add VMR unified build pipelines (#18409)

Contributes to dotnet/source-build#3823

- Removes and consolidates vmr-cross-build.yml/ci-cross-build.yml POC into vmr-build.yml/ci.yml
- Add stage for building vertical/unified build legs into vmr-build.yml
- Adds Windows build and handling for Windows/Unix differences

Author: akoeplinger

Diff for: src/SourceBuild/content/build.sh

@@ -185,6 +185,12 @@ while [[ $# > 0 ]]; do
   shift
 done
 
+if [[ "$ci" == true ]]; then
+  if [[ "$exclude_ci_binary_log" == false ]]; then
+    binary_log=true
+  fi
+fi
+
 . "$scriptroot/eng/common/tools.sh"
 
 function Build {

Diff for: src/SourceBuild/content/eng/build.ps1

@@ -48,21 +48,17 @@ if ($help) {
   exit 0
 }
 
-$arguments=""
-if ($cleanWhileBuilding) {
-  $arguments += " /p:CleanWhileBuilding=true"
-}
-
 function Build {
   InitializeToolset
 
   $bl = if ($binaryLog) { '/bl:' + (Join-Path $LogDir 'Build.binlog') } else { '' }
+  $cwb = if ($cleanWhileBuilding) { '/p:CleanWhileBuilding=true' } else { '' }
   $buildProj = Join-Path $RepoRoot 'build.proj'
 
   MSBuild $buildProj `
     $bl `
     /p:Configuration=$configuration `
-    $arguments `
+    $cwb `
     @properties
 }
 
@@ -75,6 +71,11 @@ try {
     exit 0
   }
 
+  if ($ci) {
+    if (-not $excludeCIBinarylog) {
+      $binaryLog = $true
+    }
+  }
 
   Build
 }

Diff for: src/SourceBuild/content/eng/pipelines/ci-crossbuild.yml

@@ -1,4 +1,8 @@
-# This is the dotnet/dotnet-lite pipeline that is triggered by pushes to main and PRs targetting main and release/*.
+# This yml is used by these pipelines and triggers:
+#
+# - dotnet-source-build-lite (internal)
+#   - PR: release/* and main, lite build
+#   - CI: main only, every batched commit, lite build
 
 trigger:
   batch: true
@@ -13,10 +17,11 @@ pr:
     - release/*
 
 stages:
-- ${{ if and(ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest')) }}:
+- ${{ if ne(variables['Build.Reason'], 'PullRequest') }}:
   - template: templates/stages/vmr-scan.yml
 
 - template: /src/installer/eng/pipelines/templates/stages/vmr-build.yml
   parameters:
     isBuiltFromVmr: true
-    isLiteBuild: true
+    isSourceOnlyBuild: true
+    scope: lite

Diff for: src/SourceBuild/content/eng/pipelines/ci-lite.yml

@@ -1,26 +1,57 @@
-# This is the dotnet/dotnet pipeline that is triggered every weekday at midnight PST (08:00 UTC) for "main" and when changes are pushed to release/* and internal/release/* branches.
+# This yml is used by these pipelines and triggers: 
+# NOTE: the triggers are defined in the Azure DevOps UI as they are too complex
+#
+# - dotnet-source-build (public)
+#   - PR: ultralite build
+#   - CI: release/* only, every batched commit, full build
+#   - Schedule: main only, full build
+#
+# - dotnet-unified-build (public)
+#   - PR: lite build
+#   - CI: release/* only, every batched commit, full build
+#   - Schedule: main only, full build
+#
+# - dotnet-source-build (internal)
+#   - PR: ultralite build
+#   - CI: release/* and internal/release/* only, every batched commit, full build
+#   - CI: main only, every batched commit, lite build
+#   - Schedule: main only, full build
+#
+# - dotnet-unified-build (internal)
+#   - PR: lite build
+#   - CI: release/*, internal/release/* and main, every batched commit, full build
 
-schedules:
-- cron: '0 8 * * Mon-Fri'
-  displayName: Weekday midnight build
-  branches:
-    include:
-    - main
-  batch: true
+variables:
+# enable source-only build for pipelines that contain the -source-build string
+- name: isSourceOnlyBuild
+  value: ${{ contains(variables['Build.DefinitionName'], '-source-build') }}
 
-trigger:
-  batch: true
-  branches:
-   include:
-   - release/*
-   - internal/release/*
+- name: isInternalBuild
+  value: ${{ eq(variables['System.TeamProject'], 'internal') }}
 
-pr: none
+- name: isMainBranch
+  value: ${{ eq(variables['Build.SourceBranch'], 'refs/heads/main') }}
+
+- name: isScheduleTrigger
+  value: ${{ eq(variables['Build.Reason'], 'Schedule') }}
+
+- name: isPRTrigger
+  value: ${{ eq(variables['Build.Reason'], 'PullRequest') }}
 
 stages:
 - template: templates/stages/vmr-scan.yml
 
 - template: /src/installer/eng/pipelines/templates/stages/vmr-build.yml
   parameters:
     isBuiltFromVmr: true
-    isLiteBuild: false
+    isSourceOnlyBuild: ${{ variables.isSourceOnlyBuild }}
+    ${{ if eq(variables.isScheduleTrigger, 'true') }}:
+      scope: full
+    ${{ elseif and(eq(variables.isPRTrigger, 'true'), eq(variables.isSourceOnlyBuild, 'true')) }}:
+      scope: ultralite
+    ${{ elseif and(eq(variables.isPRTrigger, 'true'), not(eq(variables.isSourceOnlyBuild, 'true'))) }}:
+      scope: lite
+    ${{ elseif and(not(eq(variables.isPRTrigger, 'true')), eq(variables.isSourceOnlyBuild, 'true'), eq(variables.isInternalBuild, 'true'), eq(variables.isMainBranch, 'true')) }}:
+      scope: lite
+    ${{ else }}:
+      scope: full