Add --dry-run option to git-send-email

Add a --dry-run option to git-send-email due to having made too many
mistakes with it in the past week.  I like having a safety catch on my
machine gun.

Signed-off-by: Matthew @ilcox <matthew@wil.cx>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-send-email.perl b/git-send-email.perl
index 3f50abaeb6901772b22e6ca2c1e87b4bd92f3b92..04c89422523a9272bd1ba9c3020cb12db0018cfa 100755 (executable)
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -87,7 +87,8 @@ sub format_2822_time {
        $initial_reply_to,$initial_subject,@files,$from,$compose,$time);
 
 # Behavior modification variables
-my ($chain_reply_to, $quiet, $suppress_from, $no_signed_off_cc) = (1, 0, 0, 0);
+my ($chain_reply_to, $quiet, $suppress_from, $no_signed_off_cc,
+       $dry_run) = (1, 0, 0, 0, 0);
 my $smtp_server;
 
 # Example reply to:
@@ -116,6 +117,7 @@ sub format_2822_time {
                    "quiet" => \$quiet,
                    "suppress-from" => \$suppress_from,
                    "no-signed-off-cc|no-signed-off-by-cc" => \$no_signed_off_cc,
+                   "dry-run" => \$dry_run,
         );
 
 # Verify the user input
@@ -423,7 +425,9 @@ sub send_message
                $header .= "References: $references\n";
        }
 
-       if ($smtp_server =~ m#^/#) {
+       if ($dry_run) {
+               # We don't want to send the email.
+       } elsif ($smtp_server =~ m#^/#) {
                my $pid = open my $sm, '|-';
                defined $pid or die $!;
                if (!$pid) {