nsdeps: make generated patches independent of locale

scripts/nsdeps automatically generates a patch to add MODULE_IMPORT_NS
tags, and what is nicer, it sorts the lines alphabetically with the
'sort' command. However, the output from the 'sort' command depends on
locale.

For example, I got this:

$ { echo usbstorage; echo usb_storage; } | LANG=en_US.UTF-8 sort
usbstorage
usb_storage
$ { echo usbstorage; echo usb_storage; } | LANG=C sort
usb_storage
usbstorage

So, this means people might potentially send different patches.

This kind of issue was reported in the past, for example,
commit f55f2328bb28 ("kbuild: make sorting initramfs contents
independent of locale").

Adding 'LANG=C' is a conventional way of fixing when a deterministic
result is desirable.

I added 'LANG=C' very close to the 'sort' command since changing
locale affects the language of error messages etc. We should respect
users' choice as much as possible.

Reviewed-by: Matthias Maennich <maennich@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>

diff --git a/scripts/nsdeps b/scripts/nsdeps
index 964b7fb8c546d392a6e4d432a49166ddd4e7b951..3754dac13b312f16a655e73af68d4912c8da7c9b 100644 (file)
--- a/scripts/nsdeps
+++ b/scripts/nsdeps
@@ -41,7 +41,7 @@ generate_deps() {
                for source_file in $mod_source_files; do
                        sed '/MODULE_IMPORT_NS/Q' $source_file > ${source_file}.tmp
                        offset=$(wc -l ${source_file}.tmp | awk '{print $1;}')
-                       cat $source_file | grep MODULE_IMPORT_NS | sort -u >> ${source_file}.tmp
+                       cat $source_file | grep MODULE_IMPORT_NS | LANG=C sort -u >> ${source_file}.tmp
                        tail -n +$((offset +1)) ${source_file} | grep -v MODULE_IMPORT_NS >> ${source_file}.tmp
                        if ! diff -q ${source_file} ${source_file}.tmp; then
                                mv ${source_file}.tmp ${source_file}