package SQL::Translator::Utils;
-# ----------------------------------------------------------------------
-# $Id: Utils.pm,v 1.8 2003-06-27 16:30:35 kycl4rk Exp $
-# ----------------------------------------------------------------------
-# Copyright (C) 2003 darren chamberlain <darren@cpan.org>
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; version 2.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-# 02111-1307 USA
-# -------------------------------------------------------------------
-
use strict;
-use base qw(Exporter);
-use vars qw($VERSION $DEFAULT_COMMENT @EXPORT_OK);
+use warnings;
+use Digest::SHA qw( sha1_hex );
+use File::Spec;
+use Class::Unload;
-use Exporter;
+our $VERSION = '1.59';
+our $DEFAULT_COMMENT = '-- ';
-$VERSION = sprintf "%d.%02d", q$Revision: 1.8 $ =~ /(\d+)\.(\d+)/;
-$DEFAULT_COMMENT = '-- ';
-@EXPORT_OK = qw(
- debug normalize_name header_comment parse_list_arg $DEFAULT_COMMENT
+use base qw(Exporter);
+our @EXPORT_OK = qw(
+ debug normalize_name header_comment parse_list_arg truncate_id_uniquely
+ $DEFAULT_COMMENT parse_mysql_version parse_dbms_version
+ ddl_parser_instance
);
+use constant COLLISION_TAG_LENGTH => 8;
-# ----------------------------------------------------------------------
-# debug(@msg)
-#
-# Will send debugging messages to STDERR, if the caller's $DEBUG global
-# is set.
-#
-# This debug() function has a neat feature: Occurances of the strings
-# PKG, LINE, and SUB in each message will be replaced with elements
-# from caller():
-#
-# debug("PKG: Bad things happened on line LINE!");
-#
-# Will be warned as:
-#
-# [SQL::Translator: Bad things happened on line 643]
-#
-# If called from Translator.pm, on line 643.
-# ----------------------------------------------------------------------
sub debug {
my ($pkg, $file, $line, $sub) = caller(0);
{
}
}
-# ----------------------------------------------------------------------
sub normalize_name {
- my $name = shift;
+ my $name = shift or return '';
# The name can only begin with a-zA-Z_; if there's anything
# else, prefix with _
return $name;
}
-# ----------------------------------------------------------------------
sub header_comment {
my $producer = shift || caller;
my $comment_char = shift;
return $header_comment;
}
-# ----------------------------------------------------------------------
sub parse_list_arg {
my $list = UNIVERSAL::isa( $_[0], 'ARRAY' ) ? shift : [ @_ ];
- return [ map { s/^\s+|\s+$//g; $_ }
- map { split /,/ }
- grep { defined && length } @$list
- ];
+ #
+ # This protects stringification of references.
+ #
+ if ( @$list && ref $list->[0] ) {
+ return $list;
+ }
+ #
+ # This processes string-like arguments.
+ #
+ else {
+ return [
+ map { s/^\s+|\s+$//g; $_ }
+ map { split /,/ }
+ grep { defined && length } @$list
+ ];
+ }
}
-1;
+sub truncate_id_uniquely {
+ my ( $desired_name, $max_symbol_length ) = @_;
+
+ return $desired_name
+ unless defined $desired_name && length $desired_name > $max_symbol_length;
+
+ my $truncated_name = substr $desired_name, 0,
+ $max_symbol_length - COLLISION_TAG_LENGTH - 1;
+
+ # Hex isn't the most space-efficient, but it skirts around allowed
+ # charset issues
+ my $digest = sha1_hex($desired_name);
+ my $collision_tag = substr $digest, 0, COLLISION_TAG_LENGTH;
+
+ return $truncated_name
+ . '_'
+ . $collision_tag;
+}
+
+
+sub parse_mysql_version {
+ my ($v, $target) = @_;
+
+ return undef unless $v;
+
+ $target ||= 'perl';
+
+ my @vers;
+
+ # X.Y.Z style
+ if ( $v =~ / ^ (\d+) \. (\d{1,3}) (?: \. (\d{1,3}) )? $ /x ) {
+ push @vers, $1, $2, $3;
+ }
+
+ # XYYZZ (mysql) style
+ elsif ( $v =~ / ^ (\d) (\d{2}) (\d{2}) $ /x ) {
+ push @vers, $1, $2, $3;
+ }
+
+ # XX.YYYZZZ (perl) style or simply X
+ elsif ( $v =~ / ^ (\d+) (?: \. (\d{3}) (\d{3}) )? $ /x ) {
+ push @vers, $1, $2, $3;
+ }
+ else {
+ #how do I croak sanely here?
+ die "Unparseable MySQL version '$v'";
+ }
+
+ if ($target eq 'perl') {
+ return sprintf ('%d.%03d%03d', map { $_ || 0 } (@vers) );
+ }
+ elsif ($target eq 'mysql') {
+ return sprintf ('%d%02d%02d', map { $_ || 0 } (@vers) );
+ }
+ else {
+ #how do I croak sanely here?
+ die "Unknown version target '$target'";
+ }
+}
+
+sub parse_dbms_version {
+ my ($v, $target) = @_;
+
+ return undef unless $v;
+
+ my @vers;
+
+ # X.Y.Z style
+ if ( $v =~ / ^ (\d+) \. (\d{1,3}) (?: \. (\d{1,3}) )? $ /x ) {
+ push @vers, $1, $2, $3;
+ }
+
+ # XX.YYYZZZ (perl) style or simply X
+ elsif ( $v =~ / ^ (\d+) (?: \. (\d{3}) (\d{3}) )? $ /x ) {
+ push @vers, $1, $2, $3;
+ }
+ else {
+ #how do I croak sanely here?
+ die "Unparseable database server version '$v'";
+ }
+
+ if ($target eq 'perl') {
+ return sprintf ('%d.%03d%03d', map { $_ || 0 } (@vers) );
+ }
+ elsif ($target eq 'native') {
+ return join '.' => grep defined, @vers;
+ }
+ else {
+ #how do I croak sanely here?
+ die "Unknown version target '$target'";
+ }
+}
+
+my ($parsers_libdir, $checkout_dir);
+sub ddl_parser_instance {
+ my $type = shift;
+
+ # it may differ from our caller, even though currently this is not the case
+ eval "require SQL::Translator::Parser::$type"
+ or die "Unable to load grammar-spec container SQL::Translator::Parser::$type:\n$@";
+
+ unless ($parsers_libdir) {
+
+ # are we in a checkout?
+ if ($checkout_dir = _find_co_root()) {
+ $parsers_libdir = File::Spec->catdir($checkout_dir, 'share', 'PrecompiledParsers');
+ }
+ else {
+ require File::ShareDir;
+ $parsers_libdir = File::Spec->catdir(
+ File::ShareDir::dist_dir('SQL-Translator'),
+ 'PrecompiledParsers'
+ );
+ }
+
+ unshift @INC, $parsers_libdir;
+ }
+
+ my $precompiled_mod = "Parse::RecDescent::DDL::SQLT::$type";
+
+ # FIXME FIXME FIXME
+ # Parse::RecDescent has horrible architecture where each precompiled parser
+ # instance shares global state with all its siblings
+ # What we do here is gross, but scarily efficient - the parser compilation
+ # is much much slower than an unload/reload cycle
+ Class::Unload->unload($precompiled_mod);
+
+ # There is also a sub-namespace that P::RD uses, but simply unsetting
+ # $^W to stop redefine warnings seems to be enough
+ #Class::Unload->unload("Parse::RecDescent::$precompiled_mod");
+
+ eval "local \$^W; require $precompiled_mod" or do {
+ if ($checkout_dir) {
+ die "Unable to find precompiled grammar for $type - run Makefile.PL to generate it\n";
+ }
+ else {
+ die "Unable to load precompiled grammar for $type... this is not supposed to happen if you are not in a checkout, please file a bugreport:\n$@"
+ }
+ };
+
+ my $grammar_spec_fn = $INC{"SQL/Translator/Parser/$type.pm"};
+ my $precompiled_fn = $INC{"Parse/RecDescent/DDL/SQLT/$type.pm"};
+
+ if (
+ (stat($grammar_spec_fn))[9]
+ >
+ (stat($precompiled_fn))[9]
+ ) {
+ die (
+ "Grammar spec '$grammar_spec_fn' is newer than precompiled parser '$precompiled_fn'"
+ . ($checkout_dir
+ ? " - run Makefile.PL to regenerate stale versions\n"
+ : "... this is not supposed to happen if you are not in a checkout, please file a bugreport\n"
+ )
+ );
+ }
+
+ return $precompiled_mod->new;
+}
+
+# Try to determine the root of a checkout/untar if possible
+# or return undef
+sub _find_co_root {
+
+ my @mod_parts = split /::/, (__PACKAGE__ . '.pm');
+ my $rel_path = join ('/', @mod_parts); # %INC stores paths with / regardless of OS
+
+ return undef unless ($INC{$rel_path});
+
+ # a bit convoluted, but what we do here essentially is:
+ # - get the file name of this particular module
+ # - do 'cd ..' as many times as necessary to get to lib/SQL/Translator/../../..
-# ----------------------------------------------------------------------
+ my $root = (File::Spec::Unix->splitpath($INC{$rel_path}))[1];
+ for (1 .. @mod_parts) {
+ $root = File::Spec->catdir($root, File::Spec->updir);
+ }
+
+ return ( -f File::Spec->catfile($root, 'Makefile.PL') )
+ ? $root
+ : undef
+ ;
+}
+
+1;
=pod
parse_list_arg( [ 'id', 'name' ] );
parse_list_arg( qw[ id name ] );
+=head2 truncate_id_uniquely
+
+Takes a string ($desired_name) and int ($max_symbol_length). Truncates
+$desired_name to $max_symbol_length by including part of the hash of
+the full name at the end of the truncated name, giving a high
+probability that the symbol will be unique. For example,
+
+ truncate_id_uniquely( 'a' x 100, 64 )
+ truncate_id_uniquely( 'a' x 99 . 'b', 64 );
+ truncate_id_uniquely( 'a' x 99, 64 )
+
+Will give three different results; specifically:
+
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa_7f900025
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa_6191e39a
+ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa_8cd96af2
+
=head2 $DEFAULT_COMMENT
This is the default comment string, '-- ' by default. Useful for
C<header_comment>.
+=head2 parse_mysql_version
+
+Used by both L<Parser::MySQL|SQL::Translator::Parser::MySQL> and
+L<Producer::MySQL|SQL::Translator::Producer::MySQL> in order to provide a
+consistent format for both C<< parser_args->{mysql_parser_version} >> and
+C<< producer_args->{mysql_version} >> respectively. Takes any of the following
+version specifications:
+
+ 5.0.3
+ 4.1
+ 3.23.2
+ 5
+ 5.001005 (perl style)
+ 30201 (mysql style)
+
+=head2 parse_dbms_version
+
+Takes a version string (X.Y.Z) or perl style (XX.YYYZZZ) and a target ('perl'
+or 'native') transforms the string to the given target style.
+to
+
=head1 AUTHORS
Darren Chamberlain E<lt>darren@cpan.orgE<gt>,
Ken Y. Clark E<lt>kclark@cpan.orgE<gt>.
=cut
-
-=cut