Re: [PATCH] post-receive-email: ensure sent messages are not empty

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On 08/02/2010 05:00 PM, Junio C Hamano wrote:
> "Kevin P. Fleming" <kpfleming@xxxxxxxxxx> writes:
> 
>> @@ -687,10 +699,12 @@ if [ -n "$1" -a -n "$2" -a -n "$3" ]; then
>>  	# Output to the terminal in command line mode - if someone wanted to
>>  	# resend an email; they could redirect the output to sendmail
>>  	# themselves
>> -	PAGER= generate_email $2 $3 $1
>> +	prep_for_email $2 $3 $1
>> +	PAGER= generate_email
>>  else
>>  	while read oldrev newrev refname
>>  	do
>> -		generate_email $oldrev $newrev $refname | send_mail
>> +		prep_for_email $oldrev $newrev $refname
>> +		generate_email | send_mail
>>  	done
> 
> As "prep" exits, when this is run as a hook to read many updated refs, any
> inappropriate update to one ref will cause messages for later refs from
> getting sent out.  Earlier such an update may have sent an empty message
> but at least didn't break messages for other refs, if I am reading the
> code correctly.  Is that what you really want?
> 
> Perhaps you would want to do something like this instead, after adjusting
> the exit code from the new "prep" shell function?
> 
> 	while ...
>         do
>         	prep_for_email || continue
>                 generate_email | send_mail
> 	done
> 

You are right; instead of prep_for_email using 'exit 0' to stop the
process as was done before, it should just return an exit code to skip
the current ref being processed. This was also a bug previously, since
generate_email used 'exit 0' to stop the processing of a particular ref,
which would actually stop processing of any further refs as well.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming@xxxxxxxxxx
Check us out at www.digium.com & www.asterisk.org
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