perl/Git/SVN/GlobSpec.pm

   1 package Git::SVN::GlobSpec;
   2 use strict;
   3 use warnings;
   4
   5 sub new {
   6         my ($class, $glob, $pattern_ok) = @_;
   7         my $re = $glob;
   8         $re =~ s!/+$!!g; # no need for trailing slashes
   9         my (@left, @right, @patterns);
  10         my $state = "left";
  11         my $die_msg = "Only one set of wildcards " .
  12                                 "(e.g. '*' or '*/*/*') is supported: $glob\n";
  13         for my $part (split(m|/|, $glob)) {
  14                 if ($pattern_ok && $part =~ /[{}]/ &&
  15                          $part !~ /^\{[^{}]+\}/) {
  16                         die "Invalid pattern in '$glob': $part\n";
  17                 }
  18                 my $nstars = $part =~ tr/*//;
  19                 if ($nstars > 1) {
  20                         die "Only one '*' is allowed in a pattern: '$part'\n";
  21                 }
  22                 if ($part =~ /(.*)\*(.*)/) {
  23                         die $die_msg if $state eq "right";
  24                         my ($l, $r) = ($1, $2);
  25                         $state = "pattern";
  26                         my $pat = quotemeta($l) . '[^/]*' . quotemeta($r);
  27                         push(@patterns, $pat);
  28                 } elsif ($pattern_ok && $part =~ /^\{(.*)\}$/) {
  29                         die $die_msg if $state eq "right";
  30                         $state = "pattern";
  31                         my $p = quotemeta($1);
  32                         $p =~ s/\\,/|/g;
  33                         push(@patterns, "(?:$p)");
  34                 } else {
  35                         if ($state eq "left") {
  36                                 push(@left, $part);
  37                         } else {
  38                                 push(@right, $part);
  39                                 $state = "right";
  40                         }
  41                 }
  42         }
  43         my $depth = @patterns;
  44         if ($depth == 0) {
  45                 die "One '*' is needed in glob: '$glob'\n";
  46         }
  47         my $left = join('/', @left);
  48         my $right = join('/', @right);
  49         $re = join('/', @patterns);
  50         $re = join('\/',
  51                    grep(length, quotemeta($left),
  52                                 "($re)(?=/|\$)",
  53                                 quotemeta($right)));
  54         my $left_re = qr/^\/\Q$left\E(\/|$)/;
  55         bless { left => $left, right => $right, left_regex => $left_re,
  56                 regex => qr/$re/, glob => $glob, depth => $depth }, $class;
  57 }
  58
  59 sub full_path {
  60         my ($self, $path) = @_;
  61         return (length $self->{left} ? "$self->{left}/" : '') .
  62                $path . (length $self->{right} ? "/$self->{right}" : '');
  63 }
  64
  65 1;