From 1b7eeb80190501aaf226e90e8f58f994cfc3efe0 Mon Sep 17 00:00:00 2001
From: Laura Abbott <labbott@fedoraproject.org>
Date: Thu, 10 Nov 2016 10:16:25 -0800
Subject: Change method of configuration generation

The existing method of managing configuration files gets unweildy.
Changing individual lines in text files gets difficult without
manual organization. Switch to a method of configuration generation
that's inspired from the method used inside Red Hat. Each configuration
option gets its own file which are then combined to form the
configuration files. This makes confirming what's actually enabled much
easier.
---
 build_configs.sh | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100755 build_configs.sh

(limited to 'build_configs.sh')

diff --git a/build_configs.sh b/build_configs.sh
new file mode 100755
index 000000000..55fb89d01
--- /dev/null
+++ b/build_configs.sh
@@ -0,0 +1,91 @@
+#!/bin/bash
+#
+# This script merges together the hierarchy of CONFIG_* files under generic
+# and debug to form the necessary $PACKAGE_NAME<version>-<arch>-<variant>.config
+# files for building RHEL kernels, based on the contents of a control file
+
+PACKAGE_NAME=kernel # defines the package name used
+
+set errexit
+set nounset
+
+control_file="config_generation"
+
+function combine_config_layer()
+{
+	dir=$1
+	file="config-$(echo $dir | sed -e 's|/|-|g')"
+
+	if [ $(ls $dir/ | grep -c "^CONFIG_") -eq 0 ]; then
+		touch $file
+		return
+	fi
+
+	cat $dir/CONFIG_* > $file
+}
+
+function merge_configs()
+{
+	archvar=$1
+	arch=$(echo "$archvar" | cut -f1 -d"-")
+	configs=$2
+	name=$PACKAGE_NAME-$archvar.config
+	echo -n "Building $name ... "
+	touch config-merging config-merged
+	for config in $(echo $configs | sed -e 's/:/ /g')
+	do
+		perl merge.pl config-$config config-merging > config-merged
+		if [ ! $? -eq 0 ]; then
+			exit
+		fi
+		mv config-merged config-merging
+	done
+	if [ "x$arch" == "xaarch64" ]; then
+		echo "# arm64" > $name
+	elif [ "x$arch" == "xppc64" ]; then
+		echo "# powerpc" > $name
+	elif [ "x$arch" == "xppc64le" ]; then
+		echo "# powerpc" > $name
+	elif [ "x$arch" == "xppc64p7" ]; then
+		echo "# powerpc" > $name
+	elif [ "x$arch" == "xs390x" ]; then
+		echo "# s390" > $name
+	elif [ "x$arch" == "xarmv7hl" ]; then
+		echo "# arm" > $name
+	elif [ "x$arch" == "xi686" ]; then
+		echo "# i386" > $name
+	else
+		echo "# $arch" > $name
+	fi
+	sort config-merging >> $name
+	rm -f config-merged config-merging
+	echo "done"
+}
+
+glist=$(find baseconfig -type d)
+dlist=$(find debugconfig -type d)
+
+for d in $glist $dlist
+do
+	combine_config_layer $d
+done
+
+while read line
+do
+	if [ $(echo "$line" | grep -c "^#") -ne 0 ]; then
+		continue
+	elif [ $(echo "$line" | grep -c "^$") -ne 0 ]; then
+		continue
+	else
+		arch=$(echo "$line" | cut -f1 -d"=")
+		configs=$(echo "$line" | cut -f2 -d"=")
+
+		if [ -n "$SUBARCH" -a "$SUBARCH" != "$arch" ]; then
+			continue
+		fi
+
+		merge_configs $arch $configs
+	fi
+done < $control_file
+
+rm -f config-*
-- 
cgit