qt5base-lts/mkspecs/features/resources_functions.prf

# http://www.w3.org/TR/xml/#syntax
defineReplace(xml_escape) {
    1 ~= s,&,&,
    1 ~= s,\',',
    1 ~= s,\",",
    1 ~= s,<,&lt;,
    1 ~= s,>,&gt;,
    return($$1)
}

defineTest(qtFlattenResources) {
    immediate = qmake_immediate$$QMAKE_RESOURCES_IMMEDIATE_NR
    defined(QMAKE_RESOURCES_IMMEDIATE_NR, var): \
        QMAKE_RESOURCES_IMMEDIATE_NR = $$num_add($$QMAKE_RESOURCES_IMMEDIATE_NR, 1)
    else: \
        QMAKE_RESOURCES_IMMEDIATE_NR = 1

    RESOURCES += $$immediate
    for(resource, RESOURCES) {
        # Regular case of user qrc file
        contains(resource, ".*\\.qrc$"): \
            next()

        # Fallback for stand-alone files/directories
        !defined($${resource}.files, var) {
            !equals(resource, $$immediate) {
                !exists($$absolute_path($$resource, $$_PRO_FILE_PWD_)): \
                    warning("Failure to find: $$resource")
                $${immediate}.files += $$resource
                OTHER_FILES *= $$resource
            }
            RESOURCES -= $$resource
            next()
        }

        resource_file = $$absolute_path($$RCC_DIR/qmake_$${resource}.qrc, $$OUT_PWD)

        isEmpty(BUILDS)|build_pass {
            # Collection of files, generate qrc file
            prefix = $$eval($${resource}.prefix)
            isEmpty(prefix): \
                prefix = "/"

            resource_file_content = \
                "<!DOCTYPE RCC><RCC version=\"1.0\">" \
                "<qresource prefix=\"$$xml_escape($$prefix)\">"

            abs_base = $$absolute_path($$eval($${resource}.base), $$_PRO_FILE_PWD_)

            for(file, $${resource}.files) {
                abs_path = $$absolute_path($$file, $$_PRO_FILE_PWD_)
                files = $$files($$abs_path/*, true)
                isEmpty(files): \
                    files = $$abs_path
                for (file, files) {
                    exists($$file/*): next()  # exclude directories
                    alias = $$relative_path($$file, $$abs_base)
                    resource_file_content += \
                        "<file alias=\"$$xml_escape($$alias)\">$$xml_escape($$file)</file>"
                    OTHER_FILES *= $$file
                }
            }

            resource_file_content += \
                "</qresource>" \
                "</RCC>"

            !write_file($$resource_file, resource_file_content): \
                error()
        }

        RESOURCES -= $$resource
        RESOURCES += $$resource_file
    }
    export(QMAKE_RESOURCES_IMMEDIATE_NR)
    export(RESOURCES)
    export(OTHER_FILES)
    export($${immediate}.files)
    return(true)
}