Initial Commit

database/perl/lib/Perl/PrereqScanner/NotQuiteLite/Parser/ClassLoad.pm

@@ -0,0 +1,146 @@
+package Perl::PrereqScanner::NotQuiteLite::Parser::ClassLoad;
+
+use strict;
+use warnings;
+use Perl::PrereqScanner::NotQuiteLite::Util;
+
+my %known_functions = map {$_ => 1} qw/
+  load_class try_load_class load_optional_class
+  load_first_existing_class
+/;
+
+sub register { return {
+  use => {
+    'Class::Load' => 'parse_class_load_args',
+  },
+}}
+
+sub register_fqfn { return {
+  map { "Class::Load::".$_ => "parse_".$_."_args" }
+  keys %known_functions
+}}
+
+sub parse_class_load_args {
+  my ($class, $c, $used_module, $raw_tokens) = @_;
+
+  my $tokens = convert_string_tokens($raw_tokens);
+  if (is_version($tokens->[0])) {
+    $c->add($used_module => shift @$tokens);
+  }
+
+  for my $token (@$tokens) {
+    next if ref $token;
+
+    if ($known_functions{$token}) {
+      $c->register_keyword_parser(
+        $token,
+        [$class, 'parse_'.$token.'_args', $used_module],
+      );
+    } elsif ($token eq ':all') {
+      for my $func (keys %known_functions) {
+        $c->register_keyword_parser(
+          $func,
+          [$class, 'parse_'.$func.'_args', $used_module],
+        );
+      }
+    }
+  }
+}
+
+sub parse_load_class_args {
+  my ($class, $c, $used_module, $raw_tokens) = @_;
+
+  my $tokens = convert_string_tokens($raw_tokens);
+  shift @$tokens; # function
+  my ($module, undef, $options) = @$tokens;
+  my $version = 0;
+  if (ref $options and $options->[1] eq '{}') {
+    my $tokens_in_hashref = convert_string_tokens($options->[0]);
+    while(my ($key, undef, $value, undef) = splice @$tokens_in_hashref, 0, 4) {
+      if (ref $key and $key->[0] eq '-version' and is_version($value)) {
+        $version = $value;
+      }
+    }
+  }
+  $c->add_conditional($module => $version);
+}
+
+sub parse_try_load_class_args {
+  my ($class, $c, $used_module, $raw_tokens) = @_;
+
+  my $tokens = convert_string_tokens($raw_tokens);
+  shift @$tokens; # function
+  my ($module, undef, $options) = @$tokens;
+  my $version = 0;
+  if (ref $options and $options->[1] eq '{}') {
+    my $tokens_in_hashref = convert_string_tokens($options->[0]);
+    while(my ($key, undef, $value, undef) = splice @$tokens_in_hashref, 0, 4) {
+      if (ref $key and $key->[0] eq '-version' and is_version($value)) {
+        $version = $value;
+      }
+    }
+  }
+  $c->add_suggestion($module => $version);
+}
+
+sub parse_load_optional_class_args {
+  my ($class, $c, $used_module, $raw_tokens) = @_;
+
+  $class->parse_try_load_class_args($c, $used_module, $raw_tokens);
+}
+
+sub parse_load_first_existing_class_args {
+  my ($class, $c, $used_module, $raw_tokens) = @_;
+
+  my $tokens = convert_string_tokens($raw_tokens);
+  shift @$tokens; # function
+  my ($module, $version);
+  for my $token (@$tokens) {
+    if (is_module_name($token)) {
+      if ($module) {
+        $c->add_suggestion($module => $version);
+      }
+      $module = $token;
+      $version = 0;
+      next;
+    }
+    if (ref $token and ($token->[1] || '') eq '{}') {
+      my $tokens_in_hashref = convert_string_tokens($token->[0]);
+      while(my ($key, undef, $value, undef) = splice @$tokens_in_hashref, 0, 4) {
+        if (ref $key and $key->[0] eq '-version' and is_version($value)) {
+          $version = $value;
+        }
+      }
+    }
+  }
+  if ($module) {
+    $c->add_suggestion($module => $version);
+  }
+}
+
+1;
+
+__END__
+
+=encoding utf-8
+
+=head1 NAME
+
+Perl::PrereqScanner::NotQuiteLite::Parser::ClassLoad
+
+=head1 DESCRIPTION
+
+This parser is to deal with module loading by C<Class::Load>.
+
+=head1 AUTHOR
+
+Kenichi Ishigaki, E<lt>ishigaki@cpan.orgE<gt>
+
+=head1 COPYRIGHT AND LICENSE
+
+This software is copyright (c) 2017 by Kenichi Ishigaki.
+
+This is free software; you can redistribute it and/or modify it under
+the same terms as the Perl 5 programming language system itself.
+
+=cut