Re: [PATCH] Optional limit for number of lines generated by script

> We have become used to the features of svnmailer when used with Subversion,
> and one of those useful features is that it can limit the maximum length
> (in lines) of a commit email message. This is terribly useful since once the
> goes beyond a reasonable number of lines, nobody is going to read the remainder,
> and if they really want the entire contents of the commits, they can use
> git itself to get them using the revision IDs present in the message already.
> 
> Change the post-receive-email script to respond to an 'emailmaxlines' config key
> which, if specified, will limit the number of lines generated (including
> headers); any lines beyond the limit are suppressed, and a final line is added
> indicating the number that were suppressed.
> ---
>  contrib/hooks/post-receive-email |   33 ++++++++++++++++++++++++++++++++-
>  1 files changed, 32 insertions(+), 1 deletions(-)
> 
> diff --git a/contrib/hooks/post-receive-email b/contrib/hooks/post-receive-email
> index 30ae63d..d3b5fab 100755
> --- a/contrib/hooks/post-receive-email
> +++ b/contrib/hooks/post-receive-email
> @@ -55,6 +55,11 @@
>  #     "t=%s; printf 'http://.../?id=%%s' \$t; echo;echo; git show -C \$t; echo"
>  #   Be careful if "..." contains things that will be expanded by shell "eval"
>  #   or printf.
> +# hooks.emailmaxlines
> +#   The maximum number of lines that should be included in the generated
> +#   email (including its headers). If not specified, there is no limit.
> +#   Lines beyond the limit are suppressed and counted, and a final
> +#   line is added indicating the number of suppressed lines.
>  #
>  # Notes
>  # -----
> @@ -642,6 +647,27 @@ show_new_revisions()
>  }
>  
>  
> +limit_lines()
> +{
> +    lines=0
> +    skipped=0
> +    while IFS="" read line
> +    do
> +	lines=$((lines + 1))
> +	if [ $lines -gt $1 ]
> +	then
> +	    skipped=$((skipped + 1))
> +	else
> +	    echo "$line"
> +	fi
> +    done
> +    if [ $skipped -ne 0 ]
> +    then
> +	echo "... $skipped lines suppressed ..."
> +    fi
> +}
> +
> +
>  send_mail()
>  {
>  	if [ -n "$envelopesender" ]; then
> @@ -679,6 +705,7 @@ announcerecipients=$(git config hooks.announcelist)
>  envelopesender=$(git config hooks.envelopesender)
>  emailprefix=$(git config hooks.emailprefix || echo '[SCM] ')
>  custom_showrev=$(git config hooks.showrev)
> +maxlines=$(git config hooks.emailmaxlines)
>  
>  # --- Main loop
>  # Allow dual mode: run from the command line just like the update hook, or
> @@ -691,6 +718,10 @@ if [ -n "$1" -a -n "$2" -a -n "$3" ]; then
>  else
>  	while read oldrev newrev refname
>  	do
> -		generate_email $oldrev $newrev $refname | send_mail
> +		if [ -z "$maxlines" ]; then
> +			generate_email $oldrev $newrev $refname | send_mail
> +		else
> +			generate_email $oldrev $newrev $refname | limit_lines $maxlines | send_mail
> +		fi
>  	done
>  fi