coercion for database list

[dbsrgits/DBIx-Class-DeploymentHandler.git] / lib / DBIx / Class / DeploymentHandler.pm

diff --git a/lib/DBIx/Class/DeploymentHandler.pm b/lib/DBIx/Class/DeploymentHandler.pm
index d4d2db5..e78d07f 100644 (file)
--- a/lib/DBIx/Class/DeploymentHandler.pm
+++ b/lib/DBIx/Class/DeploymentHandler.pm
@@ -6,6 +6,18 @@ require DBIx::Class::Schema;    # loaded for type constraint
 require DBIx::Class::Storage;   # loaded for type constraint
 require DBIx::Class::ResultSet; # loaded for type constraint
 use Carp::Clan '^DBIx::Class::DeploymentHandler';
+use SQL::Translator;
+
+BEGIN {
+  use Moose::Util::TypeConstraints;
+  subtype 'DBIx::Class::DeploymentHandler::Databases'
+    => as 'ArrayRef[Str]';
+
+  coerce 'DBIx::Class::DeploymentHandler::Databases'
+    => from 'Str'
+    => via { [$_] };
+  no Moose::Util::TypeConstraints;
+}
 
 has schema => (
   isa      => 'DBIx::Class::Schema',
@@ -62,6 +74,19 @@ has version_rs => (
   handles    => [qw( is_installed db_version )],
 );
 
+has databases => (
+  coerce  => 1,
+  isa     => 'DBIx::Class::DeploymentHandler::Databases',
+  is      => 'ro',
+  default => sub { [qw( MySQL SQLite PostgreSQL )] },
+);
+
+has sqltargs => (
+  isa => 'HashRef',
+  is  => 'ro',
+  default => sub { {} },
+);
+
 method _build_version_rs {
    $self->schema->set_us_up_the_bomb;
    $self->schema->resultset('__VERSION')
@@ -69,8 +94,6 @@ method _build_version_rs {
 
 method backup { $self->storage->backup($self->backup_directory) }
 
-method create_ddl_dir { $self->storage->create_ddl_dir( $self->schema, @_ ) }
-
 method install($new_version) {
   carp 'Install not possible as versions table already exists in database'
     if $self->is_installed;
@@ -166,6 +189,131 @@ method upgrade_single_step($db_version, $target_version) {
   });
 }
 
+method create_ddl_dir($version, $preversion) {
+  my $schema    = $self->schema;
+  my $databases = $self->databases;
+  my $dir       = $self->upgrade_directory;
+  my $sqltargs  = $self->sqltargs;
+  unless( -d $dir ) {
+    carp "Upgrade directory $dir does not exist, using ./\n";
+    $dir = "./";
+  }
+
+  my $schema_version = $schema->schema_version || '1.x';
+  $version ||= $schema_version;
+
+  $sqltargs = {
+    add_drop_table => 1,
+    ignore_constraint_names => 1,
+    ignore_index_names => 1,
+    %{$sqltargs || {}}
+  };
+
+  my $sqlt = SQL::Translator->new( $sqltargs );
+
+  $sqlt->parser('SQL::Translator::Parser::DBIx::Class');
+  my $sqlt_schema = $sqlt->translate({ data => $schema })
+    or $self->throw_exception ($sqlt->error);
+
+  foreach my $db (@$databases) {
+    $sqlt->reset;
+    $sqlt->{schema} = $sqlt_schema;
+    $sqlt->producer($db);
+
+    my $filename = $self->ddl_filename($db, $version, $dir);
+    if (-e $filename && ($version eq $schema_version )) {
+      # if we are dumping the current version, overwrite the DDL
+      carp "Overwriting existing DDL file - $filename";
+      unlink $filename;
+    }
+
+    my $output = $sqlt->translate;
+    if(!$output) {
+      carp("Failed to translate to $db, skipping. (" . $sqlt->error . ")");
+      next;
+    }
+    my $file;
+    unless( open $file, q(>), $filename ) {
+      $self->throw_exception("Can't open $filename for writing ($!)");
+      next;
+    }
+    print {$file} $output;
+    close $file;
+
+    next unless $preversion;
+
+    require SQL::Translator::Diff;
+
+    my $prefilename = $self->ddl_filename($db, $preversion, $dir);
+    unless(-e $prefilename) {
+      carp("No previous schema file found ($prefilename)");
+      next;
+    }
+
+    my $diff_file = $self->ddl_filename($db, $version, $dir, $preversion);
+    if(-e $diff_file) {
+      carp("Overwriting existing diff file - $diff_file");
+      unlink $diff_file;
+    }
+
+    my $source_schema;
+    {
+      my $t = SQL::Translator->new({
+         %{$sqltargs},
+         debug => 0,
+         trace => 0,
+      });
+
+      $t->parser( $db ) # could this really throw an exception?
+        or $self->throw_exception ($t->error);
+
+      my $out = $t->translate( $prefilename )
+        or $self->throw_exception ($t->error);
+
+      $source_schema = $t->schema;
+
+      $source_schema->name( $prefilename )
+        unless  $source_schema->name;
+    }
+
+    # The "new" style of producers have sane normalization and can support
+    # diffing a SQL file against a DBIC->SQLT schema. Old style ones don't
+    # And we have to diff parsed SQL against parsed SQL.
+    my $dest_schema = $sqlt_schema;
+
+    unless ( "SQL::Translator::Producer::$db"->can('preprocess_schema') ) {
+      my $t = SQL::Translator->new({
+         %{$sqltargs},
+         debug => 0,
+         trace => 0,
+      });
+
+      $t->parser( $db ) # could this really throw an exception?
+        or $self->throw_exception ($t->error);
+
+      my $out = $t->translate( $filename )
+        or $self->throw_exception ($t->error);
+
+      $dest_schema = $t->schema;
+
+      $dest_schema->name( $filename )
+        unless $dest_schema->name;
+    }
+
+    my $diff = SQL::Translator::Diff::schema_diff(
+       $source_schema, $db,
+       $dest_schema,   $db,
+       $sqltargs
+    );
+    unless(open $file, q(>), $diff_file) {
+      $self->throw_exception("Can't write to $diff_file ($!)");
+      next;
+    }
+    print {$file} $diff;
+    close $file;
+  }
+}
+
 method do_upgrade { $self->run_upgrade(qr/.*?/) }
 
 method run_upgrade($stm) {