Re: [PATCH] checkpatch: Remove obsolete period from "ambiguous SHA1" query

[Joe Perches <joe@perches.com>]

On Fri, 2019-08-30 at 11:01 -0700, Joe Perches wrote:
> On Fri, 2019-08-30 at 10:17 -0700, Sean Christopherson wrote:
> > On Fri, Aug 30, 2019 at 09:37:51AM -0700, Joe Perches wrote:
> > > On Fri, 2019-08-30 at 09:31 -0700, Sean Christopherson wrote:
> > > > Git dropped the period from its "ambiguous SHA1" error message in commit
> > > > 0c99171ad2 ("get_short_sha1: mark ambiguity error for translation"),
> > > > circa 2016.  Drop the period from checkpatch's associated query so as to
> > > > match both the old and new error messages.
> > > > 
> > > > Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
> > > > ---
> > > >  scripts/checkpatch.pl | 2 +-
> > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > 
> > > > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> > > > index 93a7edfe0f05..ef3642c53100 100755
> > > > --- a/scripts/checkpatch.pl
> > > > +++ b/scripts/checkpatch.pl
> > > > @@ -962,7 +962,7 @@ sub git_commit_info {
> > > >  
> > > >  	return ($id, $desc) if ($#lines < 0);
> > > >  
> > > > -	if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous\./) {
> > > > +	if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous/) {
> > > >  # Maybe one day convert this block of bash into something that returns
> > > >  # all matching commit ids, but it's very slow...
> > > >  #
> > > 
> > > Thanks.
> > > 
> > > Did git ever change to actually support human readable
> > > messages in multiple languages?
> > 
> > Yep, e.g.:
> > 
> >   error: Kurzer SHA-1 745f ist mehrdeutig.
> > 
> > > If so, this won't work for non-english output.
> > 
> > Yep again.  The next check for 'fatal: ambiguous argument' obviously fails
> > as well and checkpatch ends up using git's error message as the id and
> > description.
> > 
> >   ERROR: Please use git ... - ie: 'commit error: Kurze ("")'
> 
> Does git exit with unique failure codes?
> If so, maybe the waitid/siginfo_t error could be used instead.
> 

Maybe something like this works?
---
 scripts/checkpatch.pl | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index f4b6127ff469..dc001b7899ed 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -62,6 +62,7 @@ my $conststructsfile = "$D/const_structs.checkpatch";
 my $typedefsfile = "";
 my $color = "auto";
 my $allow_c99_comments = 1; # Can be overridden by --ignore C99_COMMENT_TOLERANCE
+my $git_command ='export LANG=en_US.utf-8; git';
 
 sub help {
 	my ($exitcode) = @_;
@@ -918,7 +919,7 @@ 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 +947,7 @@ 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 +971,7 @@ 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 +1021,7 @@ 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));