1 files changed, 15 insertions, 0 deletions
diff --git a/dgit b/dgit
index 6f240ab..56b2ee9 100755
--- a/dgit
+++ b/dgit
@@ -102,6 +102,7 @@ our %forceopts = map { $_=>0 }
     qw(unrepresentable unsupported-source-format
        dsc-changes-mismatch changes-origs-exactly
        uploading-binaries uploading-source-only
+       reusing-version
        import-gitapply-absurd
        import-gitapply-no-absurd
        import-dsc-with-dgit-field);
@@ -4601,6 +4602,20 @@ END
 
     confess unless !!$made_split_brain == do_split_brain();
 
+    my $tagname = debiantag_new $cversion, access_nomdistro();
+    if (!(forceing[qw(reusing-version)]) && git_get_ref "refs/tags/$tagname") {
+	supplementary_message '';
+	print STDERR f_ <<END, $cversion;
+
+Version %s has already been tagged (pushed?)
+If this was a failed (or incomplete or rejected) upload by you, just
+add a new changelog stanza for a new version number and try again.
+END
+	fail f_ <<END, $tagname;
+Tag %s already exists.
+END
+    }
+
     changedir $playground;
     progress f_ "checking that %s corresponds to HEAD", $dscfn;
     runcmd qw(dpkg-source -x --),