[PATCH] checkpatch: Make git output use LANGUAGE=en_US.utf8

[Joe Perches]

git output parsing depends on the language being en_US english.

Make the backtick execution of all `git <foo>` commands set the
LANGUAGE of the process to en_US.utf8 before executing the actual
command using `export LANGUAGE=en_US.utf8; git <foo>`.

Because the command is executed in a child process, the parent
LANGUAGE is unchanged.

Reported-by: Sean Christopherson <sean.j.christopher...@intel.com>
Signed-off-by: Joe Perches <j...@perches.com>
---
 scripts/checkpatch.pl | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index f4b6127ff469..113c017cc8e7 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -62,6 +62,8 @@ my $conststructsfile = "$D/const_structs.checkpatch";
 my $typedefsfile = "";
 my $color = "auto";
 my $allow_c99_comments = 1; # Can be overridden by --ignore 
C99_COMMENT_TOLERANCE
+# git output parsing needs US English output, so first set backtick child 
process LANGUAGE
+my $git_command ='export LANGUAGE=en_US.UTF-8; git';
 
 sub help {
        my ($exitcode) = @_;
@@ -918,7 +920,7 @@ sub seed_camelcase_includes {
        $camelcase_seeded = 1;
 
        if (-e ".git") {
-               my $git_last_include_commit = `git log --no-merges 
--pretty=format:"%h%n" -1 -- include`;
+               my $git_last_include_commit = `${git_command} log --no-merges 
--pretty=format:"%h%n" -1 -- include`;
                chomp $git_last_include_commit;
                $camelcase_cache = 
".checkpatch-camelcase.git.$git_last_include_commit";
        } else {
@@ -946,7 +948,7 @@ sub seed_camelcase_includes {
        }
 
        if (-e ".git") {
-               $files = `git ls-files "include/*.h"`;
+               $files = `${git_command} ls-files "include/*.h"`;
                @include_files = split('\n', $files);
        }
 
@@ -970,7 +972,7 @@ sub git_commit_info {
 
        return ($id, $desc) if ((which("git") eq "") || !(-e ".git"));
 
-       my $output = `git log --no-color --format='%H %s' -1 $commit 2>&1`;
+       my $output = `${git_command} log --no-color --format='%H %s' -1 $commit 
2>&1`;
        $output =~ s/^\s*//gm;
        my @lines = split("\n", $output);
 
@@ -1020,7 +1022,7 @@ if ($git) {
                } else {
                        $git_range = "-1 $commit_expr";
                }
-               my $lines = `git log --no-color --no-merges --pretty=format:'%H 
%s' $git_range`;
+               my $lines = `${git_command} log --no-color --no-merges 
--pretty=format:'%H %s' $git_range`;
                foreach my $line (split(/\n/, $lines)) {
                        $line =~ /^([0-9a-fA-F]{40,40}) (.*)$/;
                        next if (!defined($1) || !defined($2));