kconfig: convert Kconfig helper script into a shell script

Commit 51148790 added scripts/multiconfig.py written in Python 2
to adjust Kconfig for U-Boot.

It has been hard for Python 3 users because Python 2 and Python 3
are not compatible with each other.

We are not happy about adding a new host tool dependency
(in this case, Python version dependency) for the core build process.
After some discussion, we decided to use only basic tools.

The script may get a bit more unreadable by shell scripting,
but we believe it is worthwhile.

In addition, this commit revives "<board>_config" target that is
equivalent to "<board>_defconfig" for backwards compatibility.
It is annoying to adjust various projects which use U-Boot.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Suggested-by: Igor Grinberg <grinberg@compulab.co.il>
Tested-by: Igor Grinberg <grinberg@compulab.co.il>
Acked-by: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@ti.com>
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
Cc: Stephen Warren <swarren@nvidia.com>

1 files changed, 260 insertions, 0 deletions

diff --git a/scripts/multiconfig.sh b/scripts/multiconfig.sh
new file mode 100644
index 0000000..56cf0c2
--- /dev/null
+++ b/scripts/multiconfig.sh
@@ -0,0 +1,260 @@
+#!/bin/sh
+#
+# A wrapper script to adjust Kconfig for U-Boot
+#
+# Instead of touching various parts under the scripts/kconfig/ directory,
+# pushing necessary adjustments into this single script would be better
+# for code maintainance.  All the make targets related to the configuration
+# (make %config) should be invoked via this script.
+# See doc/README.kconfig for further information of Kconfig.
+#
+# Copyright (C) 2014, Masahiro Yamada <yamada.m@jp.panasonic.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+set -e
+
+# Set "DEBUG" enavironment variable to show debug messages
+debug () {
+	if [ $DEBUG ]; then
+		echo "$@"
+	fi
+}
+
+# Useful shorthands
+build () {
+	debug $progname: $MAKE -f $srctree/scripts/Makefile.build obj="$@"
+	$MAKE -f $srctree/scripts/Makefile.build obj="$@"
+}
+
+autoconf () {
+	debug $progname: $MAKE -f $srctree/scripts/Makefile.autoconf obj="$@"
+	$MAKE -f $srctree/scripts/Makefile.autoconf obj="$@"
+}
+
+# Make a configuration target
+# Usage:
+#   run_make_config <target> <objdir>
+# <target>: Make target such as "config", "menuconfig", "defconfig", etc.
+# <objdir>: Target directory where the make command is run.
+#           Typically "", "spl", "tpl" for Normal, SPL, TPL, respectively.
+run_make_config () {
+	target=$1
+	objdir=$2
+
+	# Linux expects defconfig files in arch/$(SRCARCH)/configs/ directory,
+	# but U-Boot has them in configs/ directory.
+	# Give SRCARCH=.. to fake scripts/kconfig/Makefile.
+	options="SRCARCH=.. KCONFIG_OBJDIR=$objdir"
+	if [ "$objdir" ]; then
+		options="$options KCONFIG_CONFIG=$objdir/$KCONFIG_CONFIG"
+		mkdir -p $objdir
+	fi
+
+	build scripts/kconfig $options $target
+}
+
+# Parse .config file to detect if CONFIG_SPL, CONFIG_TPL is enabled
+# and returns:
+#   ""        if neither CONFIG_SPL nor CONFIG_TPL is defined
+#   "spl"     if CONFIG_SPL is defined but CONFIG_TPL is not
+#   "spl tpl" if both CONFIG_SPL and CONFIG_TPL are defined
+get_enabled_subimages() {
+	if [ ! -r "$KCONFIG_CONFIG" ]; then
+		# This should never happen
+		echo "$progname: $KCONFIG_CONFIG not found" >&2
+		exit 1
+	fi
+
+	# CONFIG_SPL=y -> spl
+	# CONFIG_TPL=y -> tpl
+	sed -n -e 's/^CONFIG_\(SPL\|TPL\)=y$/\1/p' $KCONFIG_CONFIG | \
+							tr '[A-Z]' '[a-z]'
+}
+
+do_silentoldconfig () {
+	run_make_config silentoldconfig
+	subimages=$(get_enabled_subimages)
+
+	for obj in $subimages
+	do
+		mkdir -p $obj/include/config $obj/include/generated
+		run_make_config silentoldconfig $obj
+	done
+
+	# If the following part fails, include/config/auto.conf should be
+	# deleted so "make silentoldconfig" will be re-run on the next build.
+	autoconf include include/autoconf.mk include/autoconf.mk.dep || {
+		rm -f include/config/auto.conf
+		exit 1
+	}
+
+	# include/config.h has been updated after "make silentoldconfig".
+	# We need to touch include/config/auto.conf so it gets newer
+	# than include/config.h.
+	# Otherwise, 'make silentoldconfig' would be invoked twice.
+	touch include/config/auto.conf
+
+	for obj in $subimages
+	do
+		autoconf $obj/include $obj/include/autoconf.mk || {
+			rm -f include/config/auto.conf
+			exit 1
+		}
+	done
+}
+
+cleanup_after_defconfig () {
+	rm -f configs/.tmp_defconfig
+	# ignore 'Directory not empty' error
+	# without using non-POSIX option '--ignore-fail-on-non-empty'
+	rmdir arch configs 2>/dev/null || true
+}
+
+# Usage:
+#  do_board_defconfig <board>_defconfig
+do_board_defconfig () {
+	defconfig_path=$srctree/configs/$1
+	tmp_defconfig_path=configs/.tmp_defconfig
+
+	mkdir -p arch configs
+	# defconfig for Normal:
+	#  pick lines without prefixes and lines starting '+' prefix
+	#  and rip the prefixes off.
+	sed -n -e '/^[+A-Z]*:/!p' -e 's/^+[A-Z]*://p' $defconfig_path \
+						> configs/.tmp_defconfig
+
+	run_make_config .tmp_defconfig || {
+		cleanup_after_defconfig
+		exit 1
+	}
+
+	for img in $(get_enabled_subimages)
+	do
+		symbol=$(echo $img | cut -c 1 | tr '[a-z]' '[A-Z]')
+		# defconfig for SPL, TPL:
+		#   pick lines with 'S', 'T' prefix and rip the prefixes off
+		sed -n -e 's/^[+A-Z]*'$symbol'[A-Z]*://p' $defconfig_path \
+						> configs/.tmp_defconfig
+		run_make_config .tmp_defconfig $img || {
+			cleanup_after_defconfig
+			exit 1
+		}
+	done
+
+	cleanup_after_defconfig
+}
+
+do_defconfig () {
+	if [ "$KBUILD_DEFCONFIG" ]; then
+		do_board_defconfig $KBUILD_DEFCONFIG
+		echo "*** Default configuration is based on '$KBUILD_DEFCONFIG'"
+	else
+		run_make_config defconfig
+	fi
+}
+
+do_savedefconfig () {
+	if [ -r "$KCONFIG_CONFIG" ]; then
+		subimages=$(get_enabled_subimages)
+	else
+		subimages=
+	fi
+
+	run_make_config savedefconfig
+
+	output_lines=
+
+	# -r option is necessay because some string-type configs may include
+	# backslashes as an escape character
+	while read -r line
+	do
+		output_lines="$output_lines $line"
+	done < defconfig
+
+	for img in $subimages
+	do
+		run_make_config savedefconfig $img
+
+		symbol=$(echo $img | cut -c 1 | tr '[a-z]' '[A-Z]')
+		unmatched=
+
+		while read -r line
+		do
+			tmp=
+			match=
+
+			# coalesce common lines together
+			for i in $output_lines
+			do
+				case "$i" in
+				"[+A-Z]*:$line")
+					tmp="$tmp $unmatched"
+					i=$(echo "$i" | \
+					    sed -e "s/^\([^:]\)*/\1$symbol/")
+					tmp="$tmp $i"
+					match=1
+					;;
+				"$line")
+					tmp="$tmp $unmatched"
+					tmp="$tmp +$symbol:$i"
+					match=1
+					;;
+				*)
+					tmp="$tmp $i"
+					;;
+				esac
+			done
+
+			if [ "$match" ]; then
+				output_lines="$tmp"
+				unmatched=
+			else
+				unmatched="$unmatched $symbol:$line"
+			fi
+		done < defconfig
+	done
+
+	rm -f defconfig
+	for line in $output_lines
+	do
+		echo $line >> defconfig
+	done
+}
+
+# Usage:
+#   do_others <objdir>/<target>
+# The field "<objdir>/" is typically empy, "spl/", "tpl/" for Normal, SPL, TPL,
+# respectively.
+# The field "<target>" is a configuration target such as "config",
+# "menuconfig", etc.
+do_others () {
+	target=${1##*/}
+
+	if [ "$target" = "$1" ]; then
+		objdir=
+	else
+		objdir=${1%/*}
+	fi
+
+	run_make_config $target $objdir
+}
+
+progname=$(basename $0)
+target=$1
+
+case $target in
+*_defconfig)
+	do_board_defconfig $target;;
+*_config)
+	do_board_defconfig ${target%_config}_defconfig;;
+silentoldconfig)
+	do_silentoldconfig;;
+defconfig)
+	do_defconfig;;
+savedefconfig)
+	do_savedefconfig;;
+*)
+	do_others $target;;
+esac