Introduce git_for_each_tag_referring

[dgit.git] / Debian / Dgit.pm

diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm
index 2be936b87c6a6d3dd23e4acc7664ef2e7dfd2bca..e2f8edd05848c76f74e13c65d6561e39df1d1e48 100644 (file)
--- a/Debian/Dgit.pm
+++ b/Debian/Dgit.pm
@@ -11,17 +11,68 @@ BEGIN {
 
     $VERSION     = 1.00;
     @ISA         = qw(Exporter);
-    @EXPORT      = qw(debiantag);
-    %EXPORT_TAGS = ( );     # eg: TAG => [ qw!name1 name2! ],
+    @EXPORT      = qw(debiantag server_branch server_ref
+                      stat_exists git_for_each_ref
+                      $package_re $branchprefix);
+    %EXPORT_TAGS = ( policyflags => qw() );
     @EXPORT_OK   = qw();
 }
 
 our @EXPORT_OK;
 
+our $package_re = '[0-9a-z][-+.0-9a-z]*';
+our $branchprefix = 'dgit';
+
+
+# policy hook exit status bits
+# any unexpected bits mean failure, and then known set bits are ignored
+
+sub NOFFCHECK () { return 2; }
+# suppress dgit-repos-server's ff check ("push" only)
+
+sub FRESHREPO () { return 4; }
+# blow away repo right away (ie, as if before push or fetch)
+# ("check-package" and "push" only)
+
+
 sub debiantag ($) { 
     my ($v) = @_;
     $v =~ y/~:/_%/;
     return "debian/$v";
 }
 
+sub server_branch ($) { return "$branchprefix/$_[0]"; }
+sub server_ref ($) { return "refs/".server_branch($_[0]); }
+
+sub stat_exists ($) {
+    my ($f) = @_;
+    return 1 if stat $f;
+    return 0 if $!==&ENOENT;
+    die "stat $f: $!";
+}
+
+sub git_for_each_ref ($$) {
+    my ($pattern,$func) = @_;
+    # calls $func->($objid,$objtype,$fullrefname,$reftail);
+    # $reftail is RHS of ref after refs/\w+/
+    # breaks if $pattern matches any ref `refs/blah' where blah has no `/'
+    my $fh = new IO::File, "-|", qw(git for-each-ref), $pattern or die $!;
+    while (<$fh>) {
+       m#^(\w+)\s+(\w+)\s+(refs/\w+/(\S+))\s# or die "$_ ?";
+       $func->($1,$2,$3,$4);
+    }
+    $!=0; $?=0; close $fh or die "$pattern $? $!";
+}
+
+sub git_for_each_tag_referring ($$) {
+    my ($objreferring, $func) = @_;
+    # calls $func->($objid,$fullrefname,$tagname);
+    git_for_each_ref('refs/tags', sub {
+       my ($objid,$objtype,$fullrefname,$tagname) = @_;
+       next unless $objtype eq 'tag';
+       next if defined $objreferring and $objid ne $objreferring;
+       $func->($objid,$fullrefname,$tagname);
+    });
+}
+
 1;