88 lines
2.2 KiB
Bash
Executable File
88 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# miniconfig - utility to minimize your coreboot config files
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#
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# Copyright 2015 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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CONFIG=$1
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NEWCONFIG=$2
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CONF=build/util/kconfig/conf
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KCONFIG=src/Kconfig
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DOTCONFIG=.config
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PREVCONFIG=.config.prev
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TMPCONFIG=.config.mini
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recreate_config()
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{
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$CONF --olddefconfig $KCONFIG &> /dev/null
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}
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if [ "$CONFIG" == "" ]; then
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printf "usage: util/miniconfig/miniconfig [path to config file] <path to new config file>\n"
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exit 0
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fi
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if [ ! -r "$CONFIG" ]; then
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printf "Can't read $CONFIG.\n"
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exit 1
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fi
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if [ "$CONFIG" == .config ]; then
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printf "Can't use .config, it's overwritten. Make a backup.\n"
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exit 1
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fi
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if [ ! -x "$CONF" ]; then
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printf "conf utility at $CONF not available.\n"
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exit 1
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fi
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# Start out by creating a default config file for a mainboard
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VENDOR=$( grep ^CONFIG_VENDOR "$CONFIG" )
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BOARD=$( grep ^CONFIG_BOARD "$CONFIG" | grep -v ROMSIZE | grep -v SPECIFIC_OPTIONS )
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printf "$VENDOR\n$BOARD\n" > "$TMPCONFIG"
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cp "$TMPCONFIG" "$DOTCONFIG"
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recreate_config
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LINES=$( cat "$CONFIG" | wc -l )
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CUR=1
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# Now go through each line of the existing, large config file, add it to our
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# new minimal config file, and see if it makes a difference when running "make
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# olddefconfig". If it does, keep the line, otherwise discard it.
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cat "$CONFIG" | while read L; do
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printf "\rProcessing $CONFIG - $CUR / $LINES (%d%%)" $(( $CUR * 100 / $LINES))
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mv "$DOTCONFIG" "$PREVCONFIG"
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cp "$TMPCONFIG" "$DOTCONFIG"
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echo "$L" >> "$DOTCONFIG"
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recreate_config
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if ! diff -q "$DOTCONFIG" "$PREVCONFIG" > /dev/null; then
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echo "$L" >> "$TMPCONFIG"
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fi
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CUR=$(( $CUR + 1 ))
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done
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echo
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if [ "$NEWCONFIG" != "" ]; then
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printf "Writing new, minimized config to $NEWCONFIG\n"
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mv "$TMPCONFIG" "$NEWCONFIG"
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else
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printf "Overwriting $CONFIG with new, minimized config.\n"
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mv "$TMPCONFIG" "$CONFIG"
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fi
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