CMake: Add a way to turn off plugin deployment

[ChangeLog][CMake] Add the NO_PLUGINS argument to
qt_deploy_runtime_dependencies. This turns off plugin deployment
altogether.

For Linux, support for NO_PLUGINS is added in a subsequent patch.

Change-Id: Ie822a287f677fdc524ba5b884115e290ea288e67
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>

src/corelib/Qt6CoreDeploySupport.cmake

@@ -183,6 +183,7 @@ endfunction()
 
 function(_qt_internal_generic_deployqt)
     set(no_value_options
+        NO_PLUGINS
         NO_TRANSLATIONS
         VERBOSE
     )
@@ -209,6 +210,12 @@ function(_qt_internal_generic_deployqt)
         message(FATAL_ERROR "Unparsed arguments: ${arg_UNPARSED_ARGUMENTS}")
     endif()
 
+    if(arg_NO_PLUGINS)
+        set(plugins "")
+    else()
+        set(plugins ${__QT_DEPLOY_PLUGINS})
+    endif()
+
     if(arg_VERBOSE OR __QT_DEPLOY_VERBOSE)
         set(verbose TRUE)
     endif()
@@ -225,7 +232,9 @@ function(_qt_internal_generic_deployqt)
     endforeach()
 
     # We need to get the runtime dependencies of plugins too.
-    list(APPEND arg_MODULES ${__QT_DEPLOY_PLUGINS})
+    if(NOT plugins STREQUAL "")
+        list(APPEND arg_MODULES ${plugins})
+    endif()
 
     # Forward the arguments that are exactly the same for file(GET_RUNTIME_DEPENDENCIES).
     set(file_GRD_args "")
@@ -280,7 +289,7 @@ function(_qt_internal_generic_deployqt)
     endif()
 
     # Deploy the Qt plugins.
-    foreach(file_path IN LISTS __QT_DEPLOY_PLUGINS)
+    foreach(file_path IN LISTS plugins)
         file(RELATIVE_PATH destination
             "${__QT_DEPLOY_QT_INSTALL_PREFIX}/${__QT_DEPLOY_QT_INSTALL_PLUGINS}"
             "${file_path}"
@@ -326,6 +335,7 @@ function(qt6_deploy_runtime_dependencies)
         VERBOSE
         NO_OVERWRITE
         NO_APP_STORE_COMPLIANCE   # TODO: Might want a better name
+        NO_PLUGINS
         NO_TRANSLATIONS
         NO_COMPILER_RUNTIME
     )
@@ -450,6 +460,9 @@ function(qt6_deploy_runtime_dependencies)
         if(arg_NO_COMPILER_RUNTIME)
             list(APPEND tool_options --no-compiler-runtime)
         endif()
+        if(arg_NO_PLUGINS)
+            list(APPEND tool_options --no-plugins)
+        endif()
 
         # Specify path to target Qt's qtpaths .exe or .bat file, so windeployqt deploys the correct
         # libraries when cross-compiling from x86_64 to arm64 windows.
@@ -465,6 +478,9 @@ function(qt6_deploy_runtime_dependencies)
         list(APPEND tool_options ${arg_DEPLOY_TOOL_OPTIONS})
     elseif(__QT_DEPLOY_SYSTEM_NAME STREQUAL Darwin)
         set(extra_binaries_option "-executable=")
+        if(arg_NO_PLUGINS)
+            list(APPEND tool_options -no-plugins)
+        endif()
         if(NOT arg_NO_APP_STORE_COMPLIANCE)
             list(APPEND tool_options -appstore-compliant)
         endif()
@@ -507,6 +523,9 @@ function(qt6_deploy_runtime_dependencies)
             endif()
         endforeach()
 
+        if(arg_NO_PLUGINS)
+            list(APPEND tool_options NO_PLUGINS)
+        endif()
         if(arg_NO_TRANSLATIONS)
             list(APPEND tool_options NO_TRANSLATIONS)
         endif()

src/corelib/doc/src/cmake/qt_deploy_runtime_dependencies.qdoc

@@ -38,6 +38,7 @@ qt_deploy_runtime_dependencies(
     [VERBOSE]
     [NO_OVERWRITE]
     [NO_APP_STORE_COMPLIANCE]
+    [NO_PLUGINS]                                  # since Qt 6.10
     [NO_TRANSLATIONS]
     [NO_COMPILER_RUNTIME]
     [DEPLOY_TOOL_OPTIONS]
@@ -184,6 +185,12 @@ The default value of \c{POST_EXCLUDE_REGEXES} is constructed from the value of
     {qt6_deploy_qt_conf}{qt_deploy_qt_conf()},
     {qt6_deploy_qml_imports}{qt_deploy_qml_imports()}
 
+\section1 Controlling deployment of Qt plugins
+
+Qt plugins are automatically deployed into \l QT_DEPLOY_PLUGINS_DIR.
+
+You can turn off plugin deployment with the \c NO_PLUGINS argument.
+
 \section1 Example
 
 The following example shows how to deploy an application \c{MyApp}.