Quelle  merge_config.sh   Sprache: Shell

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
#  merge_config.sh - Takes a list of config fragment values, and merges
#  them one by one. Provides warnings on overridden values, and specified
#  values that did not make it to the resulting .config file (due to missed
#  dependencies or config symbol removal).
#
#  Portions reused from kconf_check and generate_cfg:
#  http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/kconf_check
#  http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/generate_cfg
#
#  Copyright (c) 2009-2010 Wind River Systems, Inc.
#  Copyright 2011 Linaro

set -e

clean_up() {
 rm -f $TMP_FILE
 rm -f $MERGE_FILE
}

usage() {
 echo "Usage: $0 [OPTIONS] [CONFIG [...]]"
 echo " -h display this help text"
 echo " -m only merge the fragments, do not execute the make command"
 echo " -n use allnoconfig instead of alldefconfig"
 echo " -r list redundant entries when merging fragments"
 echo " -y make builtin have precedence over modules"
 echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead."
 echo " -s strict mode. Fail if the fragment redefines any value."
 echo " -Q disable warning messages for overridden options."
 echo
 echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable."
}

RUNMAKE=true
ALLTARGET=alldefconfig
WARNREDUN=false
BUILTIN=false
OUTPUT=.
STRICT=false
CONFIG_PREFIX=${CONFIG_-CONFIG_}
WARNOVERRIDE=echo

while true; do
 case $1 in
 "-n")
  ALLTARGET=allnoconfig
  shift
  continue
  ;;
 "-m")
  RUNMAKE=false
  shift
  continue
  ;;
 "-h")
  usage
  exit
  ;;
 "-r")
  WARNREDUN=true
  shift
  continue
  ;;
 "-y")
  BUILTIN=true
  shift
  continue
  ;;
 "-O")
  if [ -d $2 ];then
   OUTPUT=$(echo $2 | sed 's/\/*$//')
  else
   echo "output directory $2 does not exist" 1>&2
   exit 1
  fi
  shift 2
  continue
  ;;
 "-s")
  STRICT=true
  shift
  continue
  ;;
 "-Q")
  WARNOVERRIDE=true
  shift
  continue
  ;;
 *)
  break
  ;;
 esac
done

if [ "$#" -lt 1 ] ; then
 usage
 exit
fi

if [ -z "$KCONFIG_CONFIG" ]; then
 if [ "$OUTPUT" != . ]; then
  KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config")
 else
  KCONFIG_CONFIG=.config
 fi
fi

INITFILE=$1
shift;

if [ ! -r "$INITFILE" ]; then
 echo "The base file '$INITFILE' does not exist. Creating one..." >&2
 touch "$INITFILE"
fi

MERGE_LIST=$*
SED_CONFIG_EXP1="s/^\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)=.*/\1/p"
SED_CONFIG_EXP2="s/^# \(${CONFIG_PREFIX}[a-zA-Z0-9_]*\) is not set$/\1/p"

TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
MERGE_FILE=$(mktemp ./.merge_tmp.config.XXXXXXXXXX)

echo "Using $INITFILE as base"

trap clean_up EXIT

cat $INITFILE > $TMP_FILE

# Merge files, printing warnings on overridden values
for ORIG_MERGE_FILE in $MERGE_LIST ; do
 echo "Merging $ORIG_MERGE_FILE"
 if [ ! -r "$ORIG_MERGE_FILE" ]; then
  echo "The merge file '$ORIG_MERGE_FILE' does not exist. Exit." >&2
  exit 1
 fi
 cat $ORIG_MERGE_FILE > $MERGE_FILE
 CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE)

 for CFG in $CFG_LIST ; do
  grep -q -w $CFG $TMP_FILE || continue
  PREV_VAL=$(grep -w $CFG $TMP_FILE)
  NEW_VAL=$(grep -w $CFG $MERGE_FILE)
  BUILTIN_FLAG=false
  if [ "$BUILTIN" = "true" ] && [ "${NEW_VAL#CONFIG_*=}" = "m" ] && [ "${PREV_VAL#CONFIG_*=}" = "y" ]; then
   ${WARNOVERRIDE} Previous  value: $PREV_VAL
   ${WARNOVERRIDE} New value:       $NEW_VAL
   ${WARNOVERRIDE} -y passed, will not demote y to m
   ${WARNOVERRIDE}
   BUILTIN_FLAG=true
  elif [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
   ${WARNOVERRIDE} Value of $CFG is redefined by fragment $ORIG_MERGE_FILE:
   ${WARNOVERRIDE} Previous  value: $PREV_VAL
   ${WARNOVERRIDE} New value:       $NEW_VAL
   ${WARNOVERRIDE}
   if [ "$STRICT" = "true" ]; then
    STRICT_MODE_VIOLATED=true
   fi
  elif [ "$WARNREDUN" = "true" ]; then
   ${WARNOVERRIDE} Value of $CFG is redundant by fragment $ORIG_MERGE_FILE:
  fi
  if [ "$BUILTIN_FLAG" = "false" ]; then
   sed -i "/$CFG[ =]/d" $TMP_FILE
  else
   sed -i "/$CFG[ =]/d" $MERGE_FILE
  fi
 done
 # In case the previous file lacks a new line at the end
 echo >> $TMP_FILE
 cat $MERGE_FILE >> $TMP_FILE
done

if [ "$STRICT_MODE_VIOLATED" = "true" ]; then
 echo "The fragment redefined a value and strict mode had been passed."
 exit 1
fi

if [ "$RUNMAKE" = "false" ]; then
 cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
 echo "#"
 echo "# merged configuration written to $KCONFIG_CONFIG (needs make)"
 echo "#"
 exit
fi

# If we have an output dir, setup the O= argument, otherwise leave
# it blank, since O=. will create an unnecessary ./source softlink
OUTPUT_ARG=""
if [ "$OUTPUT" != "." ] ; then
 OUTPUT_ARG="O=$OUTPUT"
fi


# Use the merged file as the starting point for:
# alldefconfig: Fills in any missing symbols with Kconfig default
# allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET


# Check all specified config values took (might have missed-dependency issues)
for CFG in $(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $TMP_FILE); do

 REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
 ACTUAL_VAL=$(grep -w -e "$CFG" "$KCONFIG_CONFIG" || true)
 if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
  echo "Value requested for $CFG not in final .config"
  echo "Requested value: $REQUESTED_VAL"
  echo "Actual value: $ACTUAL_VAL"
  echo ""
 fi
done