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#!/bin/sh
set -e
B="$(dirname $0)"
BASE=arch.config
OVERLAY=overlay.config
if [ "$1" = "virt" ]; then
BASE=
OVERLAY=virt.config
fi
#################################################################################
# First just deploy base configuration (provided or just kernel default)
if [ -n "$BASE" ]; then
cp "$B/$BASE" .config
else
make defconfig
fi
# We are done if no overlay is specified
[ -n "$OVERLAY" ] || exit 0
# And now apply changes from overlay.config
while read L; do
echo "$L" | grep -qE "^[[:space:]]*$" && continue # ignore empty lines
echo "$L" | grep -qE "#.*" && continue # Ignore comments
# Remove lines with changed settings
OPTION="$(echo "$L" | grep -oE '^CONFIG_.*=')"
sed -i "#^$OPTION#d" .config
# Put config
echo "$L" >> .config
done < "$B/$OVERLAY"
# As next step run olddefconfig (note: stderr contains some output about overrided
# options so I am ignoring it)
make olddefconfig 2>/dev/null
# Now let's check that configuration
EC=0
while read L; do
echo "$L" | grep -qE "^[[:space:]]*$" && continue # ignore empty lines
echo "$L" | grep -qE "#.*" && continue # Ignore comments
OPTION="$(echo "$L" | grep -oE '^CONFIG_.*=')"
VALUE="$(echo "$L" | grep -oE '=.*$')"
if [ "$VALUE" = "=n" ]; then
if grep -qE "^$OPTION=y" .config; then
EC=1
echo -e "\e[1;31mY:\e[0m$L"
fi
else
if ! grep -qE "^$L$" .config; then
EC=1
echo -e "\e[1;31mN:\e[0m$L"
fi
fi
done < "$B/$OVERLAY"
exit $EC
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