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a5b46cd1a0
External scripts like yocto kernel scc may provide same input config fragment multiple times. This may be a bug since processing same fragments multiple times can be time consuming. Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org> Link: https://patch.msgid.link/20260122105751.2186609-3-mikko.rapeli@linaro.org Signed-off-by: Nathan Chancellor <nathan@kernel.org>
387 lines
8.8 KiB
Bash
Executable file
387 lines
8.8 KiB
Bash
Executable file
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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#
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# merge_config.sh - Takes a list of config fragment values, and merges
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# them one by one. Provides warnings on overridden values, and specified
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# values that did not make it to the resulting .config file (due to missed
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# dependencies or config symbol removal).
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#
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# Portions reused from kconf_check and generate_cfg:
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# http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/kconf_check
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# http://git.yoctoproject.org/cgit/cgit.cgi/yocto-kernel-tools/tree/tools/generate_cfg
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#
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# Copyright (c) 2009-2010 Wind River Systems, Inc.
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# Copyright 2011 Linaro
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set -e
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clean_up() {
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rm -f "$TMP_FILE"
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rm -f "$TMP_FILE.new"
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}
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usage() {
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echo "Usage: $0 [OPTIONS] [CONFIG [...]]"
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echo " -h display this help text"
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echo " -m only merge the fragments, do not execute the make command"
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echo " -n use allnoconfig instead of alldefconfig"
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echo " -r list redundant entries when merging fragments"
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echo " -y make builtin have precedence over modules"
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echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead."
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echo " -s strict mode. Fail if the fragment redefines any value."
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echo " -Q disable warning messages for overridden options."
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echo
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echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable."
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}
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RUNMAKE=true
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ALLTARGET=alldefconfig
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WARNREDUN=false
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BUILTIN=false
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OUTPUT=.
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STRICT=false
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CONFIG_PREFIX=${CONFIG_-CONFIG_}
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WARNOVERRIDE=echo
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if [ -z "$AWK" ]; then
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AWK=awk
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fi
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while true; do
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case $1 in
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"-n")
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ALLTARGET=allnoconfig
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shift
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continue
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;;
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"-m")
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RUNMAKE=false
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shift
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continue
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;;
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"-h")
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usage
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exit
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;;
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"-r")
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WARNREDUN=true
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shift
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continue
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;;
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"-y")
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BUILTIN=true
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shift
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continue
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;;
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"-O")
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if [ -d $2 ];then
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OUTPUT=$(echo $2 | sed 's/\/*$//')
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else
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echo "output directory $2 does not exist" 1>&2
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exit 1
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fi
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shift 2
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continue
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;;
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"-s")
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STRICT=true
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shift
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continue
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;;
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"-Q")
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WARNOVERRIDE=true
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shift
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continue
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;;
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*)
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break
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;;
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esac
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done
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if [ "$#" -lt 1 ] ; then
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usage
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exit
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fi
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if [ -z "$KCONFIG_CONFIG" ]; then
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if [ "$OUTPUT" != . ]; then
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KCONFIG_CONFIG=$(readlink -m -- "$OUTPUT/.config")
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else
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KCONFIG_CONFIG=.config
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fi
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fi
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INITFILE=$1
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shift;
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if [ ! -r "$INITFILE" ]; then
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echo "The base file '$INITFILE' does not exist. Creating one..." >&2
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touch "$INITFILE"
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fi
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MERGE_LIST=$*
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TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
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echo "Using $INITFILE as base"
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trap clean_up EXIT
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cat $INITFILE > $TMP_FILE
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PROCESSED_FILES=""
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# Merge files, printing warnings on overridden values
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for ORIG_MERGE_FILE in $MERGE_LIST ; do
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echo "Merging $ORIG_MERGE_FILE"
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if [ ! -r "$ORIG_MERGE_FILE" ]; then
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echo "The merge file '$ORIG_MERGE_FILE' does not exist. Exit." >&2
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exit 1
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fi
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# Check for duplicate input files
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case " $PROCESSED_FILES " in
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*" $ORIG_MERGE_FILE "*)
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${WARNOVERRIDE} "WARNING: Input file provided multiple times: $ORIG_MERGE_FILE"
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;;
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esac
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# Use awk for single-pass processing instead of per-symbol grep/sed
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if ! "$AWK" -v prefix="$CONFIG_PREFIX" \
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-v warnoverride="$WARNOVERRIDE" \
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-v strict="$STRICT" \
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-v builtin="$BUILTIN" \
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-v warnredun="$WARNREDUN" '
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BEGIN {
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strict_violated = 0
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cfg_regex = "^" prefix "[a-zA-Z0-9_]+"
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notset_regex = "^# " prefix "[a-zA-Z0-9_]+ is not set$"
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}
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# Extract config name from a line, returns "" if not a config line
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function get_cfg(line) {
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if (match(line, cfg_regex)) {
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return substr(line, RSTART, RLENGTH)
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} else if (match(line, notset_regex)) {
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# Extract CONFIG_FOO from "# CONFIG_FOO is not set"
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sub(/^# /, "", line)
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sub(/ is not set$/, "", line)
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return line
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}
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return ""
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}
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function warn_builtin(cfg, prev, new) {
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if (warnoverride == "true") return
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print cfg ": -y passed, will not demote y to m"
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print "Previous value: " prev
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print "New value: " new
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print ""
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}
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function warn_redefined(cfg, prev, new) {
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if (warnoverride == "true") return
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print "Value of " cfg " is redefined by fragment " mergefile ":"
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print "Previous value: " prev
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print "New value: " new
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print ""
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}
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function warn_redundant(cfg) {
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if (warnredun != "true" || warnoverride == "true") return
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print "Value of " cfg " is redundant by fragment " mergefile ":"
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}
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# First pass: read merge file, store all lines and index
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FILENAME == ARGV[1] {
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mergefile = FILENAME
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merge_lines[FNR] = $0
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merge_total = FNR
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cfg = get_cfg($0)
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if (cfg != "") {
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merge_cfg[cfg] = $0
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merge_cfg_line[cfg] = FNR
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}
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next
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}
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# Second pass: process base file (TMP_FILE)
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FILENAME == ARGV[2] {
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cfg = get_cfg($0)
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# Not a config or not in merge file - keep it
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if (cfg == "" || !(cfg in merge_cfg)) {
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print $0 >> ARGV[3]
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next
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}
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prev_val = $0
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new_val = merge_cfg[cfg]
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# BUILTIN: do not demote y to m
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if (builtin == "true" && new_val ~ /=m$/ && prev_val ~ /=y$/) {
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warn_builtin(cfg, prev_val, new_val)
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print $0 >> ARGV[3]
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skip_merge[merge_cfg_line[cfg]] = 1
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next
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}
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# Values equal - redundant
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if (prev_val == new_val) {
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warn_redundant(cfg)
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next
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}
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# "=n" is the same as "is not set"
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if (prev_val ~ /=n$/ && new_val ~ / is not set$/) {
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print $0 >> ARGV[3]
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next
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}
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# Values differ - redefined
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warn_redefined(cfg, prev_val, new_val)
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if (strict == "true") {
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strict_violated = 1
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}
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}
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# output file, skip all lines
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FILENAME == ARGV[3] {
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nextfile
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}
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END {
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# Newline in case base file lacks trailing newline
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print "" >> ARGV[3]
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# Append merge file, skipping lines marked for builtin preservation
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for (i = 1; i <= merge_total; i++) {
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if (!(i in skip_merge)) {
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print merge_lines[i] >> ARGV[3]
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}
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}
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if (strict_violated) {
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exit 1
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}
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}' \
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"$ORIG_MERGE_FILE" "$TMP_FILE" "$TMP_FILE.new"; then
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# awk exited non-zero, strict mode was violated
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STRICT_MODE_VIOLATED=true
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fi
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mv "$TMP_FILE.new" "$TMP_FILE"
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PROCESSED_FILES="$PROCESSED_FILES $ORIG_MERGE_FILE"
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done
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if [ "$STRICT_MODE_VIOLATED" = "true" ]; then
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echo "The fragment redefined a value and strict mode had been passed."
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exit 1
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fi
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if [ "$RUNMAKE" = "false" ]; then
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cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
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echo "#"
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echo "# merged configuration written to $KCONFIG_CONFIG (needs make)"
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echo "#"
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exit
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fi
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# If we have an output dir, setup the O= argument, otherwise leave
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# it blank, since O=. will create an unnecessary ./source softlink
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OUTPUT_ARG=""
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if [ "$OUTPUT" != "." ] ; then
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OUTPUT_ARG="O=$OUTPUT"
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fi
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# Use the merged file as the starting point for:
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# alldefconfig: Fills in any missing symbols with Kconfig default
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# allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
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make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
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# Check all specified config values took effect (might have missed-dependency issues)
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if ! "$AWK" -v prefix="$CONFIG_PREFIX" \
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-v warnoverride="$WARNOVERRIDE" \
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-v strict="$STRICT" \
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-v warnredun="$WARNREDUN" '
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BEGIN {
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strict_violated = 0
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cfg_regex = "^" prefix "[a-zA-Z0-9_]+"
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notset_regex = "^# " prefix "[a-zA-Z0-9_]+ is not set$"
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}
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# Extract config name from a line, returns "" if not a config line
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function get_cfg(line) {
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if (match(line, cfg_regex)) {
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return substr(line, RSTART, RLENGTH)
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} else if (match(line, notset_regex)) {
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# Extract CONFIG_FOO from "# CONFIG_FOO is not set"
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sub(/^# /, "", line)
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sub(/ is not set$/, "", line)
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return line
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}
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return ""
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}
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function warn_mismatch(cfg, merged, final) {
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if (warnredun == "true") return
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if (final == "" && !(merged ~ / is not set$/ || merged ~ /=n$/)) {
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print "WARNING: Value requested for " cfg " not in final .config"
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print "Requested value: " merged
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print "Actual value: " final
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} else if (final == "" && merged ~ / is not set$/) {
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# not set, pass
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} else if (merged == "" && final != "") {
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print "WARNING: " cfg " not in merged config but added in final .config:"
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print "Requested value: " merged
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print "Actual value: " final
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} else {
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print "WARNING: " cfg " differs:"
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print "Requested value: " merged
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print "Actual value: " final
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}
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}
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# First pass: read effective config file, store all lines
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FILENAME == ARGV[1] {
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cfg = get_cfg($0)
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if (cfg != "") {
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config_cfg[cfg] = $0
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}
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next
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}
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# Second pass: process merged config and compare against effective config
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{
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cfg = get_cfg($0)
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if (cfg == "") next
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# strip trailing comment
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sub(/[[:space:]]+#.*/, "", $0)
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merged_val = $0
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final_val = config_cfg[cfg]
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if (merged_val == final_val) next
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if (merged_val ~ /=n$/ && final_val ~ / is not set$/) next
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if (merged_val ~ /=n$/ && final_val == "") next
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warn_mismatch(cfg, merged_val, final_val)
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if (strict == "true") {
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strict_violated = 1
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}
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}
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END {
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if (strict_violated) {
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exit 1
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}
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}' \
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"$KCONFIG_CONFIG" "$TMP_FILE"; then
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# awk exited non-zero, strict mode was violated
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STRICT_MODE_VIOLATED=true
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fi
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if [ "$STRICT" == "true" ] && [ "$STRICT_MODE_VIOLATED" == "true" ]; then
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echo "Requested and effective config differ"
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exit 1
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fi
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