aboutsummaryrefslogtreecommitdiff
path: root/support/kconfig/merge_config.sh
blob: 14917806a391a386240b41f585baa68ca3bd99bc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
#!/bin/sh
#  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
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License version 2 as
#  published by the Free Software Foundation.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#  See the GNU General Public License for more details.

clean_up() {
	rm -f $TMP_FILE
	exit
}
trap clean_up HUP INT TERM

usage() {
	echo "Usage: $0 [OPTIONS] [CONFIG [...]]"
	echo "  -h    display this help text"
	echo "  -m    only merge the fragments, do not execute the make command"
	echo "  -n    use allnoconfig instead of alldefconfig"
	echo "  -r    list redundant entries when merging fragments"
	echo "  -O    dir to put generated output files.  Consider setting \$KCONFIG_CONFIG instead."
	echo "  -e    colon-separated list of br2-external trees to use (optional)"
	echo
	echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_
	environment variable."
}

RUNMAKE=true
ALLTARGET=alldefconfig
WARNREDUN=false
OUTPUT=.
CONFIG_PREFIX=${CONFIG_-CONFIG_}

while true; do
	case $1 in
	"-n")
		ALLTARGET=allnoconfig
		shift
		continue
		;;
	"-m")
		RUNMAKE=false
		shift
		continue
		;;
	"-h")
		usage
		exit
		;;
	"-r")
		WARNREDUN=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
		;;
	"-e")
		EXTERNAL_ARG="BR2_EXTERNAL=$2"
		shift 2
		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.  Exit." >&2
	exit 1
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 -t .tmp.config.XXXXXXXXXX)

echo "Using $INITFILE as base"
cat $INITFILE > $TMP_FILE

# Merge files, printing warnings on overridden values
for MERGE_FILE in $MERGE_LIST ; do
	echo "Merging $MERGE_FILE"
	if [ ! -r "$MERGE_FILE" ]; then
		echo "The merge file '$MERGE_FILE' does not exist.  Exit." >&2
		exit 1
	fi
	CFG_LIST=$(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 $MERGE_FILE)
		if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
			echo Value of $CFG is redefined by fragment $MERGE_FILE:
			echo Previous  value: $PREV_VAL
			echo New value:       $NEW_VAL
			echo
		elif [ "$WARNREDUN" = "true" ]; then
			echo Value of $CFG is redundant by fragment $MERGE_FILE:
		fi
		sed -i "/$CFG[ =]/d" $TMP_FILE
	done
	cat $MERGE_FILE >> $TMP_FILE
done

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

clean_up