Dgit.pm: gdr_ffq_prev_branchinfo: move from git-debrebase

[dgit.git] / Debian / Dgit.pm

diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm
index 3202180587105a7f039278379978b0acd33e0741..960f505aa1579036d27f3d7374b18d74490f6e37 100644 (file)
--- a/Debian/Dgit.pm
+++ b/Debian/Dgit.pm
@@ -64,6 +64,7 @@ BEGIN {
                       shellquote printcmd messagequote
                       $negate_harmful_gitattrs
                      changedir git_slurp_config_src
+                     gdr_ffq_prev_branchinfo
                      playtree_setup);
     # implicitly uses $main::us
     %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO NOCOMMITCHECK)],
@@ -514,6 +515,22 @@ sub git_slurp_config_src ($) {
     return $r;
 }
 
+sub gdr_ffq_prev_branchinfo ($) {
+    my ($symref) = @_;
+    # => ('status', "message", [$symref, $ffq_prev, $gdrlast])
+    # 'status' may be
+    #    branch         message is undef
+    #    weird-symref   } no $symref,
+    #    notbranch      }  no $ffq_prev
+    return ('detached', 'detached HEAD') unless defined $symref;
+    return ('weird-symref', 'HEAD symref is not to refs/')
+       unless $symref =~ m{^refs/};
+    my $ffq_prev = "refs/$ffq_refprefix/$'";
+    my $gdrlast = "refs/$gdrlast_refprefix/$'";
+    printdebug "ffq_prev_branchinfo branch current $symref\n";
+    return ('branch', undef, $symref, $ffq_prev, $gdrlast);
+}
+
 # ========== playground handling ==========
 
 # terminology: