Re: Issues with envelopesender and empty log messages using contrib/hooks/post-receive-email

[Junio C Hamano <gitster@pobox.com>]

Matthew Gwynne <mathew.gwynne@gmail.com> writes:

> I've recently encountered 2 problems with use of the example
> post-receive-mail script in contrib/hooks/post-receive-email.

The script's author Andy Parkins Cc'ed.

> Firstly I found that having set hooks.envelopesender, the script ended
> up sending mail with the envelope sender set to the email address
> given literally surrounded by single quotes which caused the mail
> server to complain about invalid address syntax.
> ...
> diff --git a/contrib/hooks/post-receive-email b/contrib/hooks/post-receive-email
> index c589a39..a733d0c 100644
> --- a/contrib/hooks/post-receive-email
> +++ b/contrib/hooks/post-receive-email
> @@ -608,7 +608,7 @@ if [ -n "$1" -a -n "$2" -a -n "$3" ]; then
>  	PAGER= generate_email $2 $3 $1
>  else
>  	if [ -n "$envelopesender" ]; then
> -		envelopesender="-f '$envelopesender'"
> +		envelopesender="-f \"$envelopesender\""
>  	fi
>  
>  	while read oldrev newrev refname

I do not think this is a correct fix either.

Suppose you have envelope sender "A B <c@d.xz>" and have
original or your version to massage that string.

A few lines below the part you quoted does this:

	/usr/sbin/sendmail -t $envelopesender

which would expand and split at $IFS into

	/usr/sbin/sendmail -t -f 'A    B      <c@d.xz>'
        $0                 $1 $2 $3    $4     $5 

which is wrong, but then your fixed version would read as:

	/usr/sbin/sendmail -t -f '"A   B      <c@d.xz>"'
        $0                 $1 $2 $3    $4     $5 

which looks just as wrong.

Perhaps you would need something like this (untested) patch.

---

 contrib/hooks/post-receive-email |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/contrib/hooks/post-receive-email b/contrib/hooks/post-receive-email
index c589a39..f1efd5f 100644
--- a/contrib/hooks/post-receive-email
+++ b/contrib/hooks/post-receive-email
@@ -607,13 +607,10 @@ if [ -n "$1" -a -n "$2" -a -n "$3" ]; then
 	# resend an email; they could redirect the output to sendmail themselves
 	PAGER= generate_email $2 $3 $1
 else
-	if [ -n "$envelopesender" ]; then
-		envelopesender="-f '$envelopesender'"
-	fi
-
 	while read oldrev newrev refname
 	do
 		generate_email $oldrev $newrev $refname |
-		/usr/sbin/sendmail -t $envelopesender
+		/usr/sbin/sendmail -t ${envelopesender:+"-f"} \
+			${envelopesender:+"$envelopesender"}
 	done
 fi