hooks/post-receive-email: force log messages in UTF-8

Git commands write commit messages in UTF-8 by default, but that
default can be overridden by the [i18n] commitEncoding and
logOutputEncoding settings.  With such a setting, the emails written
by the post-receive-email hook use a mixture of encodings:

1. Log messages use the configured log output encoding, which is
meant to be whatever encoding works best with local terminals
(and does not have much to do with what encoding should be used
for email)

2. Filenames are left as is: on Linux, usually UTF-8, and in the Mingw
port (which uses Unicode filesystem APIs), always UTF-8

3. The "This is an automated email" preface uses a project description
from .git/description, which is typically in UTF-8 to support
gitweb.

So (1) is configurable, and (2) and (3) are unconfigurable and
typically UTF-8.  Override the log output encoding to always use UTF-8
when writing the email to get the best chance of a comprehensible
single-encoding email.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/contrib/hooks/post-receive-email b/contrib/hooks/post-receive-email
index 72084511e7a720448f16f94dad26ce3e7b0c9196..ba93a0d845fe83d371fcfd001b515b8d3536fb54 100755 (executable)
--- a/contrib/hooks/post-receive-email
+++ b/contrib/hooks/post-receive-email
@@ -471,7 +471,7 @@ generate_delete_branch_email()
        echo "       was  $oldrev"
        echo ""
        echo $LOGBEGIN
-       git diff-tree -s --always --pretty=oneline $oldrev
+       git diff-tree -s --always --encoding=UTF-8 --pretty=oneline $oldrev
        echo $LOGEND
 }
 
@@ -571,7 +571,7 @@ generate_delete_atag_email()
        echo "       was  $oldrev"
        echo ""
        echo $LOGBEGIN
-       git diff-tree -s --always --pretty=oneline $oldrev
+       git diff-tree -s --always --encoding=UTF-8 --pretty=oneline $oldrev
        echo $LOGEND
 }
 
@@ -617,7 +617,7 @@ generate_general_email()
        echo ""
        if [ "$newrev_type" = "commit" ]; then
                echo $LOGBEGIN
-               git diff-tree -s --always --pretty=medium $newrev
+               git diff-tree -s --always --encoding=UTF-8 --pretty=medium $newrev
                echo $LOGEND
        else
                # What can we do here?  The tag marks an object that is not
@@ -636,7 +636,7 @@ generate_delete_general_email()
        echo "       was  $oldrev"
        echo ""
        echo $LOGBEGIN
-       git diff-tree -s --always --pretty=oneline $oldrev
+       git diff-tree -s --always --encoding=UTF-8 --pretty=oneline $oldrev
        echo $LOGEND
 }