From: Michael Palimaka <kensington@gentoo.org>
Date: Wed, 30 Nov 2016 19:33:34 +0000 (+1100)
Subject: qt5-build.eclass: introduce qt_use_disable_config
X-Git-Url: http://git.tremily.us/gitweb.cgi?a=commitdiff_plain;h=2e301e46e78fd6e051b02aae7ea45459eabee5a0;p=gentoo.git

qt5-build.eclass: introduce qt_use_disable_config

Similar to qt_use_disable_mod, this function helps avoid automagic dependencies.
---

diff --git a/eclass/qt5-build.eclass b/eclass/qt5-build.eclass
index fee5775d9084..a627ce882a49 100644
--- a/eclass/qt5-build.eclass
+++ b/eclass/qt5-build.eclass
@@ -370,6 +370,29 @@ qt_use_compile_test() {
 	fi
 }
 
+# @FUNCTION: qt_use_disable_config
+# @USAGE: <flag> <config> <files...>
+# @DESCRIPTION:
+# <flag> is the name of a flag in IUSE.
+# <config> is the (lowercase) name of a Qt5 config entry.
+# <files...> is a list of one or more qmake project files.
+#
+# This function patches <files> to treat <config> as disabled
+# when <flag> is disabled, otherwise it does nothing.
+# This can be useful to avoid an automagic dependency when the config entry
+# is enabled on the system but the corresponding USE flag is disabled.
+qt_use_disable_config() {
+	[[ $# -ge 3 ]] || die "${FUNCNAME}() requires at least three arguments"
+
+	local flag=$1
+	local config=$2
+	shift 2
+
+	if ! use "${flag}"; then
+		echo "$@" | xargs sed -i -e "s/qtConfig(${config})/false/g" || die
+	fi
+}
+
 # @FUNCTION: qt_use_disable_mod
 # @USAGE: <flag> <module> <files...>
 # @DESCRIPTION: