pgsql: investigate 'driver not found' error

README.md

@@ -25,3 +25,24 @@ Koel cannot connect to the database. Let's set it up.
 
 could not find driver
 ```
+
+[pgsql functions](https://secure.php.net/manual/en/ref.pgsql.php) succeed:
+```sh
+/tmp # php -a
+Interactive shell
+
+php > $c = pg_connect("host=koel-db port=5432 dbname=koel user=koel password=secret");
+php > var_dump(pg_fetch_all(pg_query('SELECT datname FROM pg_database WHERE datistemplate = false;')));
+array(2) {
+  [0]=>
+  array(1) {
+    ["datname"]=>
+    string(8) "postgres"
+  }
+  [1]=>
+  array(1) {
+    ["datname"]=>
+    string(4) "koel"
+  }
+}
+```

driver-not-found-traceback.txt

@@ -0,0 +1,52 @@
+PDOException: could not find driver in /koel/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:46
+Stack trace:
+#0 /koel/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(46): PDO->__construct('pgsql:host=kole...', 'wer', '', Array)
+#1 /koel/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(65): Doctrine\DBAL\Driver\PDOConnection->__construct('pgsql:host=kole...', 'wer', '', Array)
+#2 /koel/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(44): Illuminate\Database\Connectors\Connector->createPdoConnection('pgsql:host=kole...', 'wer', '', Array)
+#3 /koel/vendor/laravel/framework/src/Illuminate/Database/Connectors/PostgresConnector.php(33): Illuminate\Database\Connectors\Connector->createConnection('pgsql:host=kole...', Array, Array)
+#4 /koel/vendor/laravel/framework/src/Illuminate/Database/Connectors/ConnectionFactory.php(182): Illuminate\Database\Connectors\PostgresConnector->connect(Array)
+#5 [internal function]: Illuminate\Database\Connectors\ConnectionFactory->Illuminate\Database\Connectors\{closure}()
+#6 /koel/vendor/laravel/framework/src/Illuminate/Database/Connection.php(915): call_user_func(Object(Closure))
+#7 /koel/app/Console/Commands/InitCommand.php(215): Illuminate\Database\Connection->getPdo()
+#8 /koel/app/Console/Commands/InitCommand.php(54): App\Console\Commands\InitCommand->maybeSetUpDatabase()
+#9 [internal function]: App\Console\Commands\InitCommand->handle()
+#10 /koel/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(29): call_user_func_array(Array, Array)
+#11 /koel/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(87): Illuminate\Container\BoundMethod::Illuminate\Container\{closure}()
+#12 /koel/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(31): Illuminate\Container\BoundMethod::callBoundMethod(Object(App\Application), Array, Object(Closure))
+#13 /koel/vendor/laravel/framework/src/Illuminate/Container/Container.php(564): Illuminate\Container\BoundMethod::call(Object(App\Application), Array, Array, NULL)
+#14 /koel/vendor/laravel/framework/src/Illuminate/Console/Command.php(179): Illuminate\Container\Container->call(Array)
+#15 /koel/vendor/symfony/console/Command/Command.php(251): Illuminate\Console\Command->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Illuminate\Console\OutputStyle))
+#16 /koel/vendor/laravel/framework/src/Illuminate/Console/Command.php(166): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Illuminate\Console\OutputStyle))
+#17 /koel/vendor/symfony/console/Application.php(886): Illuminate\Console\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#18 /koel/vendor/symfony/console/Application.php(262): Symfony\Component\Console\Application->doRunCommand(Object(App\Console\Commands\InitCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#19 /koel/vendor/symfony/console/Application.php(145): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#20 /koel/vendor/laravel/framework/src/Illuminate/Console/Application.php(89): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#21 /koel/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php(122): Illuminate\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#22 /koel/artisan(35): Illuminate\Foundation\Console\Kernel->handle(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#23 {main}
+
+Next Doctrine\DBAL\Driver\PDOException: could not find driver in /koel/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:50
+Stack trace:
+#0 /koel/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(65): Doctrine\DBAL\Driver\PDOConnection->__construct('pgsql:host=kole...', 'wer', '', Array)
+#1 /koel/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(44): Illuminate\Database\Connectors\Connector->createPdoConnection('pgsql:host=kole...', 'wer', '', Array)
+#2 /koel/vendor/laravel/framework/src/Illuminate/Database/Connectors/PostgresConnector.php(33): Illuminate\Database\Connectors\Connector->createConnection('pgsql:host=kole...', Array, Array)
+#3 /koel/vendor/laravel/framework/src/Illuminate/Database/Connectors/ConnectionFactory.php(182): Illuminate\Database\Connectors\PostgresConnector->connect(Array)
+#4 [internal function]: Illuminate\Database\Connectors\ConnectionFactory->Illuminate\Database\Connectors\{closure}()
+#5 /koel/vendor/laravel/framework/src/Illuminate/Database/Connection.php(915): call_user_func(Object(Closure))
+#6 /koel/app/Console/Commands/InitCommand.php(215): Illuminate\Database\Connection->getPdo()
+#7 /koel/app/Console/Commands/InitCommand.php(54): App\Console\Commands\InitCommand->maybeSetUpDatabase()
+#8 [internal function]: App\Console\Commands\InitCommand->handle()
+#9 /koel/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(29): call_user_func_array(Array, Array)
+#10 /koel/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(87): Illuminate\Container\BoundMethod::Illuminate\Container\{closure}()
+#11 /koel/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(31): Illuminate\Container\BoundMethod::callBoundMethod(Object(App\Application), Array, Object(Closure))
+#12 /koel/vendor/laravel/framework/src/Illuminate/Container/Container.php(564): Illuminate\Container\BoundMethod::call(Object(App\Application), Array, Array, NULL)
+#13 /koel/vendor/laravel/framework/src/Illuminate/Console/Command.php(179): Illuminate\Container\Container->call(Array)
+#14 /koel/vendor/symfony/console/Command/Command.php(251): Illuminate\Console\Command->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Illuminate\Console\OutputStyle))
+#15 /koel/vendor/laravel/framework/src/Illuminate/Console/Command.php(166): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Illuminate\Console\OutputStyle))
+#16 /koel/vendor/symfony/console/Application.php(886): Illuminate\Console\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#17 /koel/vendor/symfony/console/Application.php(262): Symfony\Component\Console\Application->doRunCommand(Object(App\Console\Commands\InitCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#18 /koel/vendor/symfony/console/Application.php(145): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#19 /koel/vendor/laravel/framework/src/Illuminate/Console/Application.php(89): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#20 /koel/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php(122): Illuminate\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#21 /koel/artisan(35): Illuminate\Foundation\Console\Kernel->handle(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
+#22 {main