Add a check for the existence of input files and exit (with failure)
if they are missing.
Without this additional check, missing files produce error messages
but still result in an output file being generated and a successful
exit code.
Signed-off-by: Sam Bobroff <[email protected]>
---
The current behaviour (of continuing to run with missing files) seems
like a bug to me, and I've prepared the patch with what seems to be
the safest fix: adding a test to explicitly check for file existence.
Additionally, it seems like it might be a good idea (either with or
without this patch) to add "set -e" to the script because this patch
only handles missing files, not other errors (which will currently be
ignored and return a successful exit code). Should I add this to the
patch?
This can be tested using the top level pseries_le_defconfig target and
removing arch/powerpc/configs/le.config:
$ rm arch/powerpc/configs/le.config
$ make pseries_le_defconfig
Unpatched behaviour:
Using ../arch/powerpc/configs/pseries_defconfig as base
Merging ../arch/powerpc/configs/le.config
sed: can't read ../arch/powerpc/configs/le.config: No such file or directory
cat: ../arch/powerpc/configs/le.config: No such file or directory
#
# merged configuration written to ./.config (needs make)
#
GEN ./Makefile
scripts/kconfig/conf --olddefconfig Kconfig
#
# configuration written to .config
#
Patched behaviour:
Using ../arch/powerpc/configs/pseries_defconfig as base
Merging ../arch/powerpc/configs/le.config
The merge file '../arch/powerpc/configs/le.config' does not exist. Exit.
arch/powerpc/Makefile:289: recipe for target 'pseries_le_defconfig' failed
scripts/kconfig/merge_config.sh | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/scripts/kconfig/merge_config.sh b/scripts/kconfig/merge_config.sh
index ec8e203..0d883b3 100755
--- a/scripts/kconfig/merge_config.sh
+++ b/scripts/kconfig/merge_config.sh
@@ -100,6 +100,10 @@ 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 "$SED_CONFIG_EXP" $MERGE_FILE)
for CFG in $CFG_LIST ; do
--
2.1.4
On 2015-07-20 07:12, Sam Bobroff wrote:
> Add a check for the existence of input files and exit (with failure)
> if they are missing.
>
> Without this additional check, missing files produce error messages
> but still result in an output file being generated and a successful
> exit code.
>
> Signed-off-by: Sam Bobroff <[email protected]>
Thanks, applied to kbuild.git#kconfig.
> Additionally, it seems like it might be a good idea (either with or
> without this patch) to add "set -e" to the script because this patch
> only handles missing files, not other errors (which will currently be
> ignored and return a successful exit code). Should I add this to the
> patch?
I'd prefer proper error handling over set -e. set -e usually bites you
when you expect it the least, e.g. inside the loop at the end of the script:
REQUESTED_VAL=$(grep -w -e "$CFG" $TMP_FILE)
ACTUAL_VAL=$(grep -w -e "$CFG" $OUTPUT/.config)
The second grep call can return 1, but in this case we want to report
the difference.
Michal