git-debrebase: Break out resolve_upstream_version (nfc)

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

1 files changed, 27 insertions, 16 deletions

diff --git a/git-debrebase b/git-debrebase
index 4944529..5d3c742 100755
--- a/git-debrebase
+++ b/git-debrebase
@@ -1162,25 +1162,12 @@ sub do_stitch ($;$) {
     stitch($dangling_head, $ffq_prev, $gdrlast, $ffq_prev_commitish, $prose);
 }
 
-sub cmd_new_upstream () {
-    # automatically and unconditionally launders before rebasing
-    # if rebase --abort is used, laundering has still been done
-
-    my %pieces;
+sub resolve_upstream_version ($$) {
+    my ($new_upstream, $version) = @_;
 
-    badusage "need NEW-VERSION [UPS-COMMITTISH]" unless @ARGV >= 1;
-
-    # parse args - low commitment
-    my $spec_version = shift @ARGV;
-    my $new_version = (new Dpkg::Version $spec_version, check => 1);
-    fail "bad version number \`$spec_version'" unless defined $new_version;
-    if ($new_version->is_native()) {
-	$new_version = (new Dpkg::Version "$spec_version-1", check => 1);
-    }
-    my $new_upstream_version = "$new_version";
+    my $new_upstream_version = "$version";
     $new_upstream_version =~ s/-.*?$//;;
 
-    my $new_upstream = shift @ARGV;
     if (!defined $new_upstream) {
 	my @tried;
 	# todo: at some point maybe use git-deborig to do this
@@ -1198,6 +1185,30 @@ sub cmd_new_upstream () {
     }
     $new_upstream = git_rev_parse $new_upstream;
 
+    return ($new_upstream, $new_upstream_version);
+}
+
+sub cmd_new_upstream () {
+    # automatically and unconditionally launders before rebasing
+    # if rebase --abort is used, laundering has still been done
+
+    my %pieces;
+
+    badusage "need NEW-VERSION [UPS-COMMITTISH]" unless @ARGV >= 1;
+
+    # parse args - low commitment
+    my $spec_version = shift @ARGV;
+    my $new_version = (new Dpkg::Version $spec_version, check => 1);
+    fail "bad version number \`$spec_version'" unless defined $new_version;
+    if ($new_version->is_native()) {
+	$new_version = (new Dpkg::Version "$spec_version-1", check => 1);
+    }
+
+    my $new_upstream = shift @ARGV;
+    my $new_upstream_version;
+    ($new_upstream, $new_upstream_version) =
+	resolve_upstream_version $new_upstream, $new_version;
+
     record_ffq_auto();
 
     my $piece = sub {