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-rw-r--r--perl/Git/SVN/GlobSpec.pm65
1 files changed, 65 insertions, 0 deletions
diff --git a/perl/Git/SVN/GlobSpec.pm b/perl/Git/SVN/GlobSpec.pm
new file mode 100644
index 0000000..f2c1e1f
--- /dev/null
+++ b/perl/Git/SVN/GlobSpec.pm
@@ -0,0 +1,65 @@
+package Git::SVN::GlobSpec;
+use strict;
+use warnings $ENV{GIT_PERL_FATAL_WARNINGS} ? qw(FATAL all) : ();
+
+sub new {
+ my ($class, $glob, $pattern_ok) = @_;
+ my $re = $glob;
+ $re =~ s!/+$!!g; # no need for trailing slashes
+ my (@left, @right, @patterns);
+ my $state = "left";
+ my $die_msg = "Only one set of wildcards " .
+ "(e.g. '*' or '*/*/*') is supported: $glob\n";
+ for my $part (split(m|/|, $glob)) {
+ if ($pattern_ok && $part =~ /[{}]/ &&
+ $part !~ /^\{[^{}]+\}/) {
+ die "Invalid pattern in '$glob': $part\n";
+ }
+ my $nstars = $part =~ tr/*//;
+ if ($nstars > 1) {
+ die "Only one '*' is allowed in a pattern: '$part'\n";
+ }
+ if ($part =~ /(.*)\*(.*)/) {
+ die $die_msg if $state eq "right";
+ my ($l, $r) = ($1, $2);
+ $state = "pattern";
+ my $pat = quotemeta($l) . '[^/]*' . quotemeta($r);
+ push(@patterns, $pat);
+ } elsif ($pattern_ok && $part =~ /^\{(.*)\}$/) {
+ die $die_msg if $state eq "right";
+ $state = "pattern";
+ my $p = quotemeta($1);
+ $p =~ s/\\,/|/g;
+ push(@patterns, "(?:$p)");
+ } else {
+ if ($state eq "left") {
+ push(@left, $part);
+ } else {
+ push(@right, $part);
+ $state = "right";
+ }
+ }
+ }
+ my $depth = @patterns;
+ if ($depth == 0) {
+ die "One '*' is needed in glob: '$glob'\n";
+ }
+ my $left = join('/', @left);
+ my $right = join('/', @right);
+ $re = join('/', @patterns);
+ $re = join('\/',
+ grep(length, quotemeta($left),
+ "($re)(?=/|\$)",
+ quotemeta($right)));
+ my $left_re = qr/^\/\Q$left\E(\/|$)/;
+ bless { left => $left, right => $right, left_regex => $left_re,
+ regex => qr/$re/, glob => $glob, depth => $depth }, $class;
+}
+
+sub full_path {
+ my ($self, $path) = @_;
+ return (length $self->{left} ? "$self->{left}/" : '') .
+ $path . (length $self->{right} ? "/$self->{right}" : '');
+}
+
+1;