git-send-email: make options easier to configure.

This change makes git-send-email's behavior easier to modify by adding config
equivalents for two more of git-send-email's flags.

The mapping of flag to config setting is:
  --[no-]supress-from => sendemail.suppressfrom
  --[no-]signed-off-cc => sendemail.signedoffcc

It renames the --threaded option to --thread/--no-thread; the
config variable is also called sendemail.thread.

Signed-off-by: Adam Roben <aroben@apple.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-send-email.txt

@@ -59,9 +59,11 @@ The --cc option must be repeated for each user you want on the cc list.
 	Only necessary if --compose is also set.  If --compose
 	is not set, this will be prompted for.
 
---no-signed-off-by-cc::
-	Do not add emails found in Signed-off-by: or Cc: lines to the
-	cc list.
+--signed-off-by-cc, --no-signed-off-by-cc::
+        If this is set, add emails found in Signed-off-by: or Cc: lines to the
+        cc list.
+        Default is the value of 'sendemail.signedoffbycc' configuration value;
+        if that is unspecified, default to --signed-off-by-cc.
 
 --quiet::
 	Make git-send-email less verbose.  One line per email should be
@@ -82,16 +84,18 @@ The --cc option must be repeated for each user you want on the cc list.
 	Only necessary if --compose is also set.  If --compose
 	is not set, this will be prompted for.
 
---suppress-from::
-	Do not add the From: address to the cc: list, if it shows up in a From:
-	line.
+--suppress-from, --no-suppress-from::
+        If this is set, do not add the From: address to the cc: list, if it
+        shows up in a From: line.
+        Default is the value of 'sendemail.suppressfrom' configuration value;
+        if that is unspecified, default to --no-supress-from.
 
---threaded, --no-threaded::
+--thread, --no-thread::
 	If this is set, the In-Reply-To header will be set on each email sent.
-	If disabled with "--no-threaded", no emails will have the In-Reply-To
+	If disabled with "--no-thread", no emails will have the In-Reply-To
 	header set.
-	Default is the value of the 'sendemail.threaded' configuration value;
-	if that is unspecified, default to --threaded.
+	Default is the value of the 'sendemail.thread' configuration value;
+	if that is unspecified, default to --thread.
 
 --dry-run::
 	Do everything except actually send the emails.

git-send-email.perl

@@ -64,17 +64,16 @@ sub usage {
                   email sent, rather than to the first email sent.
                   Defaults to on.
 
-   --no-signed-off-cc Suppress the automatic addition of email addresses
-                 that appear in Signed-off-by: or Cc: lines to the cc:
-                 list.  Note: Using this option is not recommended.
+   --signed-off-cc Automatically add email addresses that appear in
+                 Signed-off-by: or Cc: lines to the cc: list. Defaults to on.
 
    --smtp-server  If set, specifies the outgoing SMTP server to use.
                   Defaults to localhost.
 
    --suppress-from Suppress sending emails to yourself if your address
-                  appears in a From: line.
+                  appears in a From: line. Defaults to off.
 
-    --threaded    Specify that the "In-Reply-To:" header should be set on all
+   --thread       Specify that the "In-Reply-To:" header should be set on all
                   emails. Defaults to on.
 
    --quiet	  Make git-send-email less verbose.  One line per email
@@ -140,9 +139,6 @@ sub format_2822_time {
 my (@to,@cc,@initial_cc,@bcclist,@xh,
 	$initial_reply_to,$initial_subject,@files,$from,$compose,$time);
 
-# Behavior modification variables
-my ($threaded, $chain_reply_to, $quiet, $suppress_from, $no_signed_off_cc,
-	$dry_run) = (1, 1, 0, 0, 0, 0);
 my $smtp_server;
 my $envelope_sender;
 
@@ -157,16 +153,22 @@ sub format_2822_time {
 	$term = new FakeTerm "$@: going non-interactive";
 }
 
+# Behavior modification variables
+my ($quiet, $dry_run) = (0, 0);
+
+# Variables with corresponding config settings
+my ($thread, $chain_reply_to, $suppress_from, $signed_off_cc);
+
 my %config_settings = (
-    "threaded" => \$threaded,
-    "chainreplyto" => \$chain_reply_to,
+    "thread" => [\$thread, 1],
+    "chainreplyto" => [\$chain_reply_to, 1],
+    "suppressfrom" => [\$suppress_from, 0],
+    "signedoffcc" => [\$signed_off_cc, 1],
 );
 
 foreach my $setting (keys %config_settings) {
-    my $default = $repo->config_bool("sendemail.$setting");
-    if (defined $default) {
-        $config_settings{$setting} = $default ? 1 : 0;
-    }
+    my $config = $repo->config_bool("sendemail.$setting");
+    ${$config_settings{$setting}->[0]} = (defined $config) ? $config : $config_settings{$setting}->[1];
 }
 
 @bcclist = $repo->config('sendemail.bcc');
@@ -187,11 +189,11 @@ sub format_2822_time {
 		    "smtp-server=s" => \$smtp_server,
 		    "compose" => \$compose,
 		    "quiet" => \$quiet,
-		    "suppress-from" => \$suppress_from,
-		    "no-signed-off-cc|no-signed-off-by-cc" => \$no_signed_off_cc,
+		    "suppress-from!" => \$suppress_from,
+		    "signed-off-cc|signed-off-by-cc!" => \$signed_off_cc,
 		    "dry-run" => \$dry_run,
 		    "envelope-sender=s" => \$envelope_sender,
-		    "threaded!" => \$threaded,
+		    "thread!" => \$thread,
 	 );
 
 unless ($rc) {
@@ -298,7 +300,7 @@ sub expand_aliases {
 	$prompting++;
 }
 
-if ($threaded && !defined $initial_reply_to && $prompting) {
+if ($thread && !defined $initial_reply_to && $prompting) {
 	do {
 		$_= $term->readline("Message-ID to be used as In-Reply-To for the first email? ",
 			$initial_reply_to);
@@ -495,7 +497,7 @@ sub send_message
 Message-Id: $message_id
 X-Mailer: git-send-email $gitversion
 ";
-	if ($threaded && $reply_to) {
+	if ($thread && $reply_to) {
 
 		$header .= "In-Reply-To: $reply_to\n";
 		$header .= "References: $references\n";
@@ -620,7 +622,7 @@ sub send_message
 			}
 		} else {
 			$message .=  $_;
-			if (/^(Signed-off-by|Cc): (.*)$/i && !$no_signed_off_cc) {
+			if (/^(Signed-off-by|Cc): (.*)$/i && $signed_off_cc) {
 				my $c = $2;
 				chomp $c;
 				push @cc, $c;