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john stultz4b5f7212012-01-10 15:41:08 -08001#!/bin/sh
2# merge_config.sh - Takes a list of config fragment values, and merges
3# them one by one. Provides warnings on overridden values, and specified
4# values that did not make it to the resulting .config file (due to missed
5# dependencies or config symbol removal).
6#
7# Portions reused from kconf_check and generate_cfg:
8# http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/kconf_check
9# http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/generate_cfg
10#
11# Copyright (c) 2009-2010 Wind River Systems, Inc.
12# Copyright 2011 Linaro
13#
14# This program is free software; you can redistribute it and/or modify
15# it under the terms of the GNU General Public License version 2 as
16# published by the Free Software Foundation.
17#
18# This program is distributed in the hope that it will be useful,
19# but WITHOUT ANY WARRANTY; without even the implied warranty of
20# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
21# See the GNU General Public License for more details.
22
23clean_up() {
Darren Hartc0c0cda2012-01-10 15:41:12 -080024 rm -f $TMP_FILE
25 exit
john stultz4b5f7212012-01-10 15:41:08 -080026}
Darren Hart041b78c2012-01-10 15:41:10 -080027trap clean_up HUP INT TERM
john stultz4b5f7212012-01-10 15:41:08 -080028
29usage() {
30 echo "Usage: $0 [OPTIONS] [CONFIG [...]]"
31 echo " -h display this help text"
32 echo " -m only merge the fragments, do not execute the make command"
33 echo " -n use allnoconfig instead of alldefconfig"
John Stultz9875c422012-03-23 12:52:08 -070034 echo " -r list redundant entries when merging fragments"
Zhangfei Gao409f1172012-12-03 15:36:10 +080035 echo " -O dir to put generated output files"
john stultz4b5f7212012-01-10 15:41:08 -080036}
37
38MAKE=true
39ALLTARGET=alldefconfig
John Stultz9875c422012-03-23 12:52:08 -070040WARNREDUN=false
Zhangfei Gao409f1172012-12-03 15:36:10 +080041OUTPUT=.
john stultz4b5f7212012-01-10 15:41:08 -080042
43while true; do
44 case $1 in
45 "-n")
46 ALLTARGET=allnoconfig
47 shift
48 continue
49 ;;
50 "-m")
51 MAKE=false
52 shift
53 continue
54 ;;
55 "-h")
56 usage
57 exit
58 ;;
John Stultz9875c422012-03-23 12:52:08 -070059 "-r")
60 WARNREDUN=true
61 shift
62 continue
63 ;;
Zhangfei Gao409f1172012-12-03 15:36:10 +080064 "-O")
65 if [ -d $2 ];then
66 OUTPUT=$(echo $2 | sed 's/\/*$//')
67 else
68 echo "output directory $2 does not exist" 1>&2
69 exit 1
70 fi
71 shift 2
72 continue
73 ;;
john stultz4b5f7212012-01-10 15:41:08 -080074 *)
75 break
76 ;;
77 esac
78done
79
Josh Boyer09280612012-02-01 12:01:58 -050080INITFILE=$1
81shift;
john stultz4b5f7212012-01-10 15:41:08 -080082
83MERGE_LIST=$*
84SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p"
85TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
86
Josh Boyer09280612012-02-01 12:01:58 -050087echo "Using $INITFILE as base"
88cat $INITFILE > $TMP_FILE
89
john stultz4b5f7212012-01-10 15:41:08 -080090# Merge files, printing warnings on overrided values
91for MERGE_FILE in $MERGE_LIST ; do
92 echo "Merging $MERGE_FILE"
93 CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE)
94
95 for CFG in $CFG_LIST ; do
96 grep -q -w $CFG $TMP_FILE
97 if [ $? -eq 0 ] ; then
98 PREV_VAL=$(grep -w $CFG $TMP_FILE)
99 NEW_VAL=$(grep -w $CFG $MERGE_FILE)
100 if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
101 echo Value of $CFG is redefined by fragment $MERGE_FILE:
102 echo Previous value: $PREV_VAL
103 echo New value: $NEW_VAL
104 echo
John Stultz9875c422012-03-23 12:52:08 -0700105 elif [ "$WARNREDUN" = "true" ]; then
106 echo Value of $CFG is redundant by fragment $MERGE_FILE:
john stultz4b5f7212012-01-10 15:41:08 -0800107 fi
108 sed -i "/$CFG[ =]/d" $TMP_FILE
109 fi
110 done
111 cat $MERGE_FILE >> $TMP_FILE
112done
113
114if [ "$MAKE" = "false" ]; then
Zhangfei Gao409f1172012-12-03 15:36:10 +0800115 cp $TMP_FILE $OUTPUT/.config
john stultz4b5f7212012-01-10 15:41:08 -0800116 echo "#"
Zhangfei Gao409f1172012-12-03 15:36:10 +0800117 echo "# merged configuration written to $OUTPUT/.config (needs make)"
john stultz4b5f7212012-01-10 15:41:08 -0800118 echo "#"
119 clean_up
120 exit
121fi
122
John Stultza45c7df2013-04-04 12:02:59 -0700123# If we have an output dir, setup the O= argument, otherwise leave
124# it blank, since O=. will create an unnecessary ./source softlink
125OUTPUT_ARG=""
126if [ "$OUTPUT" != "." ] ; then
127 OUTPUT_ARG="O=$OUTPUT"
128fi
129
130
john stultz4b5f7212012-01-10 15:41:08 -0800131# Use the merged file as the starting point for:
132# alldefconfig: Fills in any missing symbols with Kconfig default
133# allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
John Stultza45c7df2013-04-04 12:02:59 -0700134make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
john stultz4b5f7212012-01-10 15:41:08 -0800135
136
137# Check all specified config values took (might have missed-dependency issues)
138for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do
139
John Stultz320d41b2012-01-10 15:41:15 -0800140 REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
Zhangfei Gao409f1172012-12-03 15:36:10 +0800141 ACTUAL_VAL=$(grep -w -e "$CFG" $OUTPUT/.config)
john stultz4b5f7212012-01-10 15:41:08 -0800142 if [ "x$REQUESTED_VAL" != "x$ACTUAL_VAL" ] ; then
143 echo "Value requested for $CFG not in final .config"
144 echo "Requested value: $REQUESTED_VAL"
145 echo "Actual value: $ACTUAL_VAL"
146 echo ""
147 fi
148done
149
150clean_up