From 125e2aeb263d8db6efec22935bf1648715c690db Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 15 Jun 2019 11:49:17 +0100
Subject: dgit: Support split view in non-splitting quilt modes

Provide --split-view|brain=auto|always|never and the corresponding
access cfg option .split-view.

This is not documented or tested yet.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 dgit | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/dgit b/dgit
index f79e3cf..51bd648 100755
--- a/dgit
+++ b/dgit
@@ -80,6 +80,8 @@ our $rmchanges;
 our $overwrite_version; # undef: not specified; '': check changelog
 our $quilt_mode;
 our $quilt_modes_re = 'linear|smash|auto|nofix|nocheck|gbp|dpm|unapplied';
+our $splitview_mode;
+our $splitview_modes_re = qr{auto|always|never};
 our $dodep14tag;
 our %internal_object_save;
 our $we_are_responder;
@@ -969,8 +971,21 @@ sub notpushing () {
 
 sub determine_whether_split_brain () {
     my ($format,) = get_source_format();
+
+    {
+	local $access_forpush;
+	default_from_access_cfg(\$splitview_mode, 'split-view', 'auto',
+				$splitview_modes_re);
+	$do_split_brain = 1 if $splitview_mode eq 'always';
+    }
+
     printdebug "format $format, quilt mode $quilt_mode\n";
+
     if (madformat_wantfixup($format) && quiltmode_splitting()) {
+	$splitview_mode ne 'never' or
+	    fail f_ "dgit: quilt mode \`%s' (for format \`%s')".
+	            " implies split view, but split-view set to \`%s'",
+		    $quilt_mode, $format, $splitview_mode;
 	$do_split_brain = 1;
     }
     $do_split_brain //= 0;
@@ -7324,6 +7339,12 @@ sub parseopts () {
 	    } elsif (m/^--overwrite$/s) {
 		push @ropts, $_;
 		$overwrite_version = '';
+	    } elsif (m/^--split-(?:view|brain)$/s) {
+		push @ropts, $_;
+		$splitview_mode = 'always';
+	    } elsif (m/^--split-(?:view|brain)=($splitview_modes_re)$/s) {
+		push @ropts, $_;
+		$splitview_mode = $1;
 	    } elsif (m/^--overwrite=(.+)$/s) {
 		push @ropts, $_;
 		$overwrite_version = $1;
-- 
cgit v1.2.3