[PATCH 8/7] viewvcs: use :utf8 for opening patch, too

[Eric Wong]

We'll also force --encoding=UTF-8 for "git show" even
if that's the default in git, since the rest of our code
already assumes UTF-8.
---
 lib/PublicInbox/ViewVCS.pm | 8 +++++---
 t/solver_git.t             | 7 ++++++-
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/lib/PublicInbox/ViewVCS.pm b/lib/PublicInbox/ViewVCS.pm
index 96883f6c..19d34092 100644
--- a/lib/PublicInbox/ViewVCS.pm
+++ b/lib/PublicInbox/ViewVCS.pm
@@ -144,7 +144,7 @@ committer $co$patchid
 <b>$s</b>\n
 EOM
        $ctx->zmore($bdy);
-       open $fh, '<', "$tmp/p" or die "open $tmp/p: $!";
+       open $fh, '<:utf8', "$tmp/p" or die "open $tmp/p: $!";
        if (-s $fh > $MAX_SIZE) {
                $ctx->zmore("---\n patch is too large to show\n");
        } else { # prepare flush_diff:
@@ -171,8 +171,10 @@ sub show_commit ($$$$) {
        # a patch embedded inside the commit message body doesn't get fed
        # to patch-id:
        my $cmd = [ '/bin/sh', '-c',
-               "git show '$SHOW_FMT' -z --no-notes --no-patch $oid >h && ".
-               "git show --pretty=format:%n -M --stat -p $oid >p && ".
+               "git show --encoding=UTF-8 '$SHOW_FMT'".
+               " -z --no-notes --no-patch $oid >h && ".
+               'git show --encoding=UTF-8 --pretty=format:%n -M'.
+               " --stat -p $oid >p && ".
                "git patch-id --stable <p" ];
        my $xenv = { GIT_DIR => $git->{git_dir} };
        my $tmp = File::Temp->newdir("show-$oid-XXXX", TMPDIR => 1);
diff --git a/t/solver_git.t b/t/solver_git.t
index 1baa012b..5c7bfa28 100644
--- a/t/solver_git.t
+++ b/t/solver_git.t
@@ -1,5 +1,5 @@
 #!perl -w
-# Copyright (C) 2019-2021 all contributors <meta@public-inbox.org>
+# Copyright (C)  all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 use strict;
 use v5.10.1;
@@ -294,6 +294,11 @@ EOF
                        is($res->content, "\0" x $size,
                                "$label content matches");
                }
+               my $utf8 = 'e022d3377fd2c50fd9931bf96394728958a90bf3';
+               $res = $cb->(GET("/$name/$utf8/s/"));
+               is($res->code, 200, 'shows commit w/ utf8.eml');
+               like($res->content, qr/El&#233;anor/,
+                               'UTF-8 commit shown properly');
        };
        test_psgi(sub { $www->call(@_) }, $client);
        SKIP: {