From: Rafael Kitover <rkitover@cpan.org>
Date: Wed, 14 Apr 2010 15:04:00 +0000 (+0000)
Subject: support $ENV{DBI_DSN} and $ENV{DBI_DRIVER} (patch from Possum)
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=c1807ed502a52187c5f7654346ddf5135616576f;p=dbsrgits%2FDBIx-Class-Historic.git

support $ENV{DBI_DSN} and $ENV{DBI_DRIVER} (patch from Possum)
---

diff --git a/Changes b/Changes
index d71bbe2..470c644 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,6 @@
 Revision history for DBIx::Class
 
+        - support connecting using $ENV{DBI_DSN} and $ENV{DBI_DRIVER}
         - current_source_alias method on ResultSet objects to
           determine the alias to use in programatically assembled
           search()es (originally added in 0.08100 but unmentioned)
diff --git a/lib/DBIx/Class.pm b/lib/DBIx/Class.pm
index 5c5a647..1a50606 100644
--- a/lib/DBIx/Class.pm
+++ b/lib/DBIx/Class.pm
@@ -384,6 +384,8 @@ wreis: Wallace Reis <wreis@cpan.org>
 
 zamolxes: Bogdan Lucaciu <bogdan@wiz.ro>
 
+Possum: Daniel LeWarne <possum@cpan.org>
+
 =head1 COPYRIGHT
 
 Copyright (c) 2005 - 2010 the DBIx::Class L</AUTHOR> and L</CONTRIBUTORS>
diff --git a/lib/DBIx/Class/Storage/DBI.pm b/lib/DBIx/Class/Storage/DBI.pm
index f24a9e1..e048b62 100644
--- a/lib/DBIx/Class/Storage/DBI.pm
+++ b/lib/DBIx/Class/Storage/DBI.pm
@@ -998,8 +998,9 @@ sub _determine_driver {
           # try to use dsn to not require being connected, the driver may still
           # force a connection in _rebless to determine version
           # (dsn may not be supplied at all if all we do is make a mock-schema)
-          my $dsn = $self->_dbi_connect_info->[0] || '';
+          my $dsn = $self->_dbi_connect_info->[0] || $ENV{DBI_DSN} || '';
           ($driver) = $dsn =~ /dbi:([^:]+):/i;
+          $driver ||= $ENV{DBI_DRIVER};
         }
       }
 
diff --git a/t/storage/dbi_env.t b/t/storage/dbi_env.t
new file mode 100644
index 0000000..f5275c3
--- /dev/null
+++ b/t/storage/dbi_env.t
@@ -0,0 +1,90 @@
+#!/usr/bin/perl
+use strict;
+use warnings;
+use lib qw(t/lib);
+use DBICTest;
+use Test::More;
+use Test::Exception;
+
+BEGIN { delete @ENV{qw(DBI_DSN DBI_DRIVER)} }
+
+my $schema;
+
+DBICTest->init_schema(sqlite_use_file => 1);
+
+my $dbname = DBICTest->_sqlite_dbname(sqlite_use_file => 1);
+
+sub count_sheep {
+    my $schema = shift;
+    scalar $schema->resultset('Artist')->search( { name => "Exploding Sheep" } )
+        ->all;
+}
+
+$schema = DBICTest::Schema->connect("dbi::$dbname");
+throws_ok { count_sheep($schema) } qr{I can't work out what driver to use},
+    'Driver in DSN empty';
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI';
+
+$schema = DBICTest::Schema->connect("dbi:Test_NonExistant_DBD:$dbname");
+throws_ok { count_sheep($schema) }
+    qr{Can't locate DBD/Test_NonExistant_DBD\.pm in \@INC},
+    "Driver class doesn't exist";
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI';
+
+$ENV{DBI_DSN} = "dbi::$dbname";
+$schema = DBICTest::Schema->connect;
+throws_ok { count_sheep($schema) } qr{I can't work out what driver to use},
+    "Driver class not defined in DBI_DSN either.";
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI';
+
+$ENV{DBI_DSN} = "dbi:Test_NonExistant_DBD2:$dbname";
+$schema = DBICTest::Schema->connect;
+throws_ok { count_sheep($schema) }
+    qr{Can't locate DBD/Test_NonExistant_DBD2\.pm in \@INC},
+    "Driver class defined in DBI_DSN doesn't exist";
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI';
+
+$ENV{DBI_DSN} = "dbi::$dbname";
+$ENV{DBI_DRIVER} = 'Test_NonExistant_DBD3';
+$schema = DBICTest::Schema->connect;
+throws_ok { count_sheep($schema) }
+    qr{Can't locate DBD/Test_NonExistant_DBD3\.pm in \@INC},
+    "Driver class defined in DBI_DRIVER doesn't exist";
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI';
+
+$ENV{DBI_DSN} = "dbi:Test_NonExistant_DBD4:$dbname";
+$schema = DBICTest::Schema->connect;
+throws_ok { count_sheep($schema) }
+qr{Can't locate DBD/Test_NonExistant_DBD4\.pm in \@INC},
+    "Driver class defined in DBI_DSN doesn't exist";
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI';
+
+delete @ENV{qw(DBI_DSN DBI_DRIVER)};
+
+$schema = DBICTest::Schema->connect("dbi:SQLite:$dbname");
+lives_ok { count_sheep($schema) } 'SQLite passed to connect_info';
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI::SQLite';
+
+$ENV{DBI_DRIVER} = 'SQLite';
+$schema = DBICTest::Schema->connect("dbi::$dbname");
+lives_ok { count_sheep($schema) } 'SQLite in DBI_DRIVER';
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI::SQLite';
+
+undef $ENV{DBI_DRIVER};
+$ENV{DBI_DSN} = "dbi:SQLite:$dbname";
+$schema = DBICTest::Schema->connect;
+lives_ok { count_sheep($schema) } 'SQLite in DBI_DSN';
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI::SQLite';
+
+$ENV{DBI_DRIVER} = 'SQLite';
+$schema = DBICTest::Schema->connect;
+lives_ok { count_sheep($schema) } 'SQLite in DBI_DSN (and DBI_DRIVER)';
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI::SQLite';
+
+$ENV{DBI_DSN} = "dbi::$dbname";
+$ENV{DBI_DRIVER} = 'SQLite';
+$schema = DBICTest::Schema->connect;
+lives_ok { count_sheep($schema) } 'SQLite in DBI_DRIVER (not DBI_DSN)';
+isa_ok $schema->storage, 'DBIx::Class::Storage::DBI::SQLite';
+
+done_testing;