kconfig: merge_config: avoid false positive matches from comment lines
authorMasahiro Yamada <yamada.masahiro@socionext.com>
Mon, 5 Nov 2018 08:19:36 +0000 (17:19 +0900)
committerMasahiro Yamada <yamada.masahiro@socionext.com>
Sun, 11 Nov 2018 14:04:51 +0000 (23:04 +0900)
The current SED_CONFIG_EXP could match to comment lines in config
fragment files, especially when CONFIG_PREFIX_ is empty. For example,
Buildroot uses empty prefixing; starting symbols with BR2_ is just
convention.

Make the sed expression more robust against false positives from
comment lines. The new sed expression matches to only valid patterns.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Petr Vorel <petr.vorel@gmail.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
scripts/kconfig/merge_config.sh

index da66e77..0ef9064 100755 (executable)
@@ -102,7 +102,8 @@ if [ ! -r "$INITFILE" ]; then
 fi
 
 MERGE_LIST=$*
-SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(${CONFIG_PREFIX}[a-zA-Z0-9_]*\)[= ].*/\2/p"
+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)
 
@@ -116,7 +117,7 @@ for MERGE_FILE in $MERGE_LIST ; do
                echo "The merge file '$MERGE_FILE' does not exist.  Exit." >&2
                exit 1
        fi
-       CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE)
+       CFG_LIST=$(sed -n -e "$SED_CONFIG_EXP1" -e "$SED_CONFIG_EXP2" $MERGE_FILE)
 
        for CFG in $CFG_LIST ; do
                grep -q -w $CFG $TMP_FILE || continue
@@ -159,7 +160,7 @@ make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
 
 
 # Check all specified config values took (might have missed-dependency issues)
-for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do
+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")