+# repository configuration
+our $config_file = '';
+our %config;
+
+# store multiple values for single key as anonymous array reference
+# single values stored directly in the hash, not as [ <value> ]
+sub hash_set_multi {
+ my ($hash, $key, $value) = @_;
+
+ if (!exists $hash->{$key}) {
+ $hash->{$key} = $value;
+ } elsif (!ref $hash->{$key}) {
+ $hash->{$key} = [ $hash->{$key}, $value ];
+ } else {
+ push @{$hash->{$key}}, $value;
+ }
+}
+
+# return hash of git project configuration
+# optionally limited to some section, e.g. 'gitweb'
+sub git_parse_project_config {
+ my $section_regexp = shift;
+ my %config;
+
+ local $/ = "\0";
+
+ open my $fh, "-|", git_cmd(), "config", '-z', '-l',
+ or return;
+
+ while (my $keyval = <$fh>) {
+ chomp $keyval;
+ my ($key, $value) = split(/\n/, $keyval, 2);
+
+ hash_set_multi(\%config, $key, $value)
+ if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
+ }
+ close $fh;
+
+ return %config;
+}
+
+# convert config value to boolean, 'true' or 'false'
+# no value, number > 0, 'true' and 'yes' values are true
+# rest of values are treated as false (never as error)
+sub config_to_bool {
+ my $val = shift;
+
+ # strip leading and trailing whitespace
+ $val =~ s/^\s+//;
+ $val =~ s/\s+$//;
+
+ return (!defined $val || # section.key
+ ($val =~ /^\d+$/ && $val) || # section.key = 1
+ ($val =~ /^(?:true|yes)$/i)); # section.key = true
+}
+
+# convert config value to simple decimal number
+# an optional value suffix of 'k', 'm', or 'g' will cause the value
+# to be multiplied by 1024, 1048576, or 1073741824
+sub config_to_int {
+ my $val = shift;
+
+ # strip leading and trailing whitespace
+ $val =~ s/^\s+//;
+ $val =~ s/\s+$//;
+
+ if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
+ $unit = lc($unit);
+ # unknown unit is treated as 1
+ return $num * ($unit eq 'g' ? 1073741824 :
+ $unit eq 'm' ? 1048576 :
+ $unit eq 'k' ? 1024 : 1);
+ }
+ return $val;
+}
+
+# convert config value to array reference, if needed
+sub config_to_multi {
+ my $val = shift;
+
+ return ref($val) ? $val : (defined($val) ? [ $val ] : []);
+}
+