CMake: Add documentation building CI instructions

Replicate the instructions that Coin does for qmake configurations.
Build all of qttools and its dependencies and then build the top-level
docs.

Task-number: QTBUG-87012
Change-Id: Iac70172cf13d8943e60c26a1f2ee3ddf5bae6667
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

coin/module_config.yaml

@@ -21,6 +21,27 @@ instructions:
       userMessageOnFailure: >
         Failed to call cmake.
 
+    - type: Group
+      instructions:
+        - type: ExecuteCommand
+          command: "{{.Env.ENV_PREFIX}} cmake --build . --target qttools/all --parallel -v"
+          maxTimeInSeconds: 12000
+          maxTimeBetweenOutput: 1200
+          userMessageOnFailure: >
+            Failed to build sources.
+        - type: ExecuteCommand
+          command: "{{.Env.ENV_PREFIX}} cmake --build . --target generate_docs -v"
+          maxTimeInSeconds: 12000
+          maxTimeBetweenOutput: 1200
+          userMessageOnFailure: >
+            Failed to generate docs.
+        - type: MakeDirectory
+          directory: "{{.BuildDir}}/qtbase/doc/global"
+      enable_if:
+        condition: property
+        property: features
+        contains_value: "Documentation"
+
   Test:
     - type: EnvironmentVariable
       variableName: Dummy

coin/platform_configs/cmake_platforms.yaml

@@ -16,7 +16,7 @@ Configurations:
 -
     Template: 'qtci-linux-Ubuntu-20.04-x86_64-50'
     Compiler: 'GCC'
-    Features: ['Sccache', 'InsignificantTests']
+    Features: ['Sccache', 'InsignificantTests', 'Documentation']
     Configure arguments: '-DBUILD_EXAMPLES=ON -DFEATURE_developer_build=ON -DWARNINGS_ARE_ERRORS=OFF -DQT_LIBINFIX=TestInfix -DQT_NAMESPACE=TestNamespace -DCMAKE_C_COMPILER_LAUNCHER=sccache -DCMAKE_CXX_COMPILER_LAUNCHER=sccache'
     Environment variables: ['NON_QTBASE_CONFIGURE_ARGS=-DCMAKE_C_COMPILER_LAUNCHER=sccache -DCMAKE_CXX_COMPILER_LAUNCHER=sccache',
         'TEST_CONFIGURE_ARGS=-DCMAKE_C_COMPILER_LAUNCHER=sccache -DCMAKE_CXX_COMPILER_LAUNCHER=sccache']