From 1b3b62d1b9fd7cc06bf2c5a1fb8044a1bcc8219f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aur=C3=A9lien=20Brooke?= <aurelien@bahiasoft.fr>
Date: Tue, 25 Feb 2025 21:29:39 +0100
Subject: [PATCH] CMake: add a DISCARD_FILE_CONTENTS option to qt_add_resources

[ChangeLog][CMake] Added a DISCARD_FILE_CONTENTS option to
qt_add_resources().

Change-Id: I75e28b1b885b66da826c72fedcb34ae0d911e6d0
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
---
 src/corelib/Qt6CoreMacros.cmake                 | 9 ++++++---
 src/corelib/doc/src/cmake/qt_add_resources.qdoc | 5 +++++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/corelib/Qt6CoreMacros.cmake b/src/corelib/Qt6CoreMacros.cmake
index 4eb90fb10fc..4fe689ab956 100644
--- a/src/corelib/Qt6CoreMacros.cmake
+++ b/src/corelib/Qt6CoreMacros.cmake
@@ -2260,8 +2260,11 @@ endfunction()
 # targets pass a value to the OUTPUT_TARGETS parameter.
 #
 function(_qt_internal_process_resource target resourceName)
-    cmake_parse_arguments(rcc "BIG_RESOURCES"
-        "PREFIX;LANG;BASE;OUTPUT_TARGETS;DESTINATION" "FILES;OPTIONS" ${ARGN})
+    set(options BIG_RESOURCES DISCARD_FILE_CONTENTS)
+    set(oneValueArgs PREFIX LANG BASE OUTPUT_TARGETS DESTINATION)
+    set(multiValueArgs FILES OPTIONS)
+
+    cmake_parse_arguments(rcc "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
 
     if("${rcc_OPTIONS}" MATCHES "-binary")
         set(isBinary TRUE)
@@ -2377,7 +2380,7 @@ function(_qt_internal_process_resource target resourceName)
         )
 
         string(APPEND qrcContents "    <file alias=\"${escaped_file_resource_path}\"")
-        if(is_empty)
+        if(is_empty OR rcc_DISCARD_FILE_CONTENTS)
             string(APPEND qrcContents " empty=\"true\"")
         endif()
         string(APPEND qrcContents ">${escaped_file}</file>\n")
diff --git a/src/corelib/doc/src/cmake/qt_add_resources.qdoc b/src/corelib/doc/src/cmake/qt_add_resources.qdoc
index 2e713b1b8e2..570272c6097 100644
--- a/src/corelib/doc/src/cmake/qt_add_resources.qdoc
+++ b/src/corelib/doc/src/cmake/qt_add_resources.qdoc
@@ -29,6 +29,7 @@ qt_add_resources(<TARGET> <RESOURCE_NAME>
                   [LANG <LANGUAGE>]
                   [BASE <PATH>]
                   [BIG_RESOURCES]
+                  [DISCARD_FILE_CONTENTS]
                   [OUTPUT_TARGETS <VARIABLE_NAME>]
                   [FILES ...] [OPTIONS ...])
 \endcode
@@ -85,6 +86,10 @@ be generated. Should you wish to perform additional processing on these targets,
 pass a variable name to the \c OUTPUT_TARGETS parameter. The \c qt_add_resources
 function stores the names of the special targets in the specified variable.
 
+If \c DISCARD_FILE_CONTENTS is specified, the resource files will be added to
+the resource system without embedding their actual contents. Instead, these
+files will be stored as empty placeholders within the generated resource.
+
 \section1 Arguments of both variants
 
 You can set additional \c{OPTIONS} that should be added to the \c{rcc} calls.