Rename $debug variable to $debuglevel (nfc)

[dgit.git] / Debian / Dgit.pm

diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm
index 4d9b81aa83af274469dbb2f302f090a82a9e46b8..e09d12f6411978f75eeb2c81d5d7d70508e0baef 100644 (file)
--- a/Debian/Dgit.pm
+++ b/Debian/Dgit.pm
@@ -1,10 +1,13 @@
-#
+# -*- perl -*-
 
 package Debian::Dgit;
 
 use strict;
 use warnings;
 
+use POSIX;
+use IO::Handle;
+
 BEGIN {
     use Exporter   ();
     our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
@@ -13,27 +16,26 @@ BEGIN {
     @ISA         = qw(Exporter);
     @EXPORT      = qw(debiantag server_branch server_ref
                       stat_exists git_for_each_ref
-                      $package_re $branchprefix);
-    %EXPORT_TAGS = ( policyflags => qw() );
-    @EXPORT_OK   = qw();
+                      $package_re $component_re $branchprefix
+                      initdebug enabledebug printdebug debugcmd
+                      $debugprefix $debuglevel
+                      shellquote printcmd);
+    %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO)] );
+    @EXPORT_OK   = @{ $EXPORT_TAGS{policyflags} };
 }
 
 our @EXPORT_OK;
 
 our $package_re = '[0-9a-z][-+.0-9a-z]*';
+our $component_re = '[0-9a-zA-Z][-+.0-9a-zA-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)
-
+# see dgit-repos-server head comment for documentation
+# 1 is reserved in case something fails with `exit 1'
+sub NOFFCHECK () { return 0x2; }
+sub FRESHREPO () { return 0x4; }
+# 0x80 is reserved
 
 sub debiantag ($) { 
     my ($v) = @_;
@@ -56,7 +58,7 @@ sub git_for_each_ref ($$) {
     # calls $func->($objid,$objtype,$fullrefname,$reftail);
     # $reftail is RHS of ref after refs/\w+/
     # breaks if $pattern matches any ref `refs/blah' where blah has no `/'
-    my $fh = new IO::File, "-|", qw(git for-each-ref), $pattern or die $!;
+    my $fh = new IO::File "-|", qw(git for-each-ref), $pattern or die $!;
     while (<$fh>) {
        m#^(\w+)\s+(\w+)\s+(refs/\w+/(\S+))\s# or die "$_ ?";
        $func->($1,$2,$3,$4);
@@ -64,4 +66,61 @@ sub git_for_each_ref ($$) {
     $!=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);
+    });
+}
+
+our $debugprefix;
+our $debuglevel = 0;
+
+sub initdebug ($) { 
+    ($debugprefix) = @_;
+    open ::DEBUG, ">/dev/null" or die $!;
+}
+
+sub enabledebug () {
+    open ::DEBUG, ">&STDERR" or die $!;
+    ::DEBUG->autoflush(1);
+    $debuglevel ||= 1;
+}
+    
+sub printdebug {
+    print ::DEBUG $debugprefix, @_ or die $! if $debuglevel>0;
+}
+
+sub shellquote {
+    my @out;
+    local $_;
+    foreach my $a (@_) {
+       $_ = $a;
+       if (m{[^-=_./0-9a-z]}i) {
+           s{['\\]}{'\\$&'}g;
+           push @out, "'$_'";
+       } else {
+           push @out, $_;
+       }
+    }
+    return join ' ', @out;
+}
+
+sub printcmd {
+    my $fh = shift @_;
+    my $intro = shift @_;
+    print $fh $intro," " or die $!;
+    print $fh shellquote @_ or die $!;
+    print $fh "\n" or die $!;
+}
+
+sub debugcmd {
+    my $extraprefix = shift @_;
+    printcmd(\*::DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0;
+}
+
 1;