import-dsc: Refuse to update a checked-out branch

[dgit.git] / dgit

diff --git a/dgit b/dgit
index 48143341e9f47177228a6f58a96b9af416542dec..809d0b9d06fc713de3d6eb70ea689007576a0aed 100755 (executable)
--- a/dgit
+++ b/dgit
@@ -78,7 +78,8 @@ our %forceopts = map { $_=>0 }
     qw(unrepresentable unsupported-source-format
        dsc-changes-mismatch changes-origs-exactly
        import-gitapply-absurd
-       import-gitapply-no-absurd);
+       import-gitapply-no-absurd
+       import-dsc-with-dgit-field);
 
 our %format_ok = map { $_=>1 } ("1.0","3.0 (native)","3.0 (quilt)");
 
@@ -5283,6 +5284,13 @@ sub cmd_import_dsc {
     $dstbranch = "refs/heads/$dstbranch" unless $dstbranch =~ m#^refs/#;
     $dstbranch = cmdoutput @git, qw(check-ref-format --normalize), $dstbranch;
 
+    my @symcmd = (@git, qw(symbolic-ref -q HEAD));
+    my $chead = cmdoutput_errok @symcmd;
+    defined $chead or $?==256 or failedcmd @symcmd;
+
+    fail "$dstbranch is checked out - will not update it"
+       if defined $chead and $chead eq $dstbranch;
+
     open D, "<", $dscfn or fail "open import .dsc ($dscfn): $!";
     $dscdata = do { local $/ = undef; <D>; };
     D->error and fail "read $dscfn: $!";