Re: [PATCH] git-send-email: RFC2822 compliant Message-ID

> How about doing this instead?
> 
>  * Move call to make_message_id() to where it matters, namely,
>    before the $message_id is needed to be placed in the
>    generated e-mail header; this has an important side effect of
>    making it clear that $from is already available.
> 
>  * Throw in Sys::Hostname::hostname() just for fun, although I
>    suspect that the code would never trigger due to the modified
>    call sequence that makes sure $from is always available.
> 
> ---
> 
> diff --git a/git-send-email.perl b/git-send-email.perl
> index 7c0c90b..9f75551 100755
> --- a/git-send-email.perl
> +++ b/git-send-email.perl
> @@ -412,13 +412,21 @@ sub extract_valid_address {
>  # 1 second since the last time we were called.
>  
>  # We'll setup a template for the message id, using the "from" address:
> -my $message_id_from = extract_valid_address($from);
> -my $message_id_template = "<%s-git-send-email-$message_id_from>";
>  
>  sub make_message_id
>  {
>  	my $date = time;
>  	my $pseudo_rand = int (rand(4200));
> +	my $du_part;
> +	for ($from, $committer, $author) {
> +		$du_part = extract_valid_address($_);
> +		last if ($du_part ne '');
> +	}
> +	if ($du_part eq '') {
> +		use Sys::Hostname qw();
> +		$du_part = 'user@' . Sys::Hostname::hostname();
> +	}
> +	my $message_id_template = "<%s-git-send-email-$du_part>";
>  	$message_id = sprintf $message_id_template, "$date$pseudo_rand";
>  	#print "new message id = $message_id\n"; # Was useful for debugging
>  }
> @@ -467,6 +475,8 @@ sub send_message
>  		$ccline = "\nCc: $cc";
>  	}
>  	$from = sanitize_address_rfc822($from);
> +	make_message_id();
> +
>  	my $header = "From: $from
>  To: $to${ccline}
>  Subject: $subject
> @@ -533,7 +543,6 @@ X-Mailer: git-send-email $gitversion
>  
>  $reply_to = $initial_reply_to;
>  $references = $initial_reply_to || '';
> -make_message_id();
>  $subject = $initial_subject;
>  
>  foreach my $t (@files) {
> @@ -627,7 +636,6 @@ foreach my $t (@files) {
>  			$references = "$message_id";
>  		}
>  	}
> -	make_message_id();
>  }
>  
>  if ($compose) {
>