Build modified streamline images

The official image from streamline does not currently work for the arm64
platform. As a temporary measure, the source code and docker build scripts
have been lifted from the official images and are used to build locally.

Some additional modifications are made to reduce overall image size, these
are documented in docker/README.md

docker/streamline-src/vendor/symfony/var-dumper/Caster/PgSqlCaster.php

@@ -0,0 +1,165 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\VarDumper\Caster;
+
+use Symfony\Component\VarDumper\Cloner\Stub;
+
+/**
+ * Casts pqsql resources to array representation.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final
+ */
+class PgSqlCaster
+{
+    private const PARAM_CODES = [
+        'server_encoding',
+        'client_encoding',
+        'is_superuser',
+        'session_authorization',
+        'DateStyle',
+        'TimeZone',
+        'IntervalStyle',
+        'integer_datetimes',
+        'application_name',
+        'standard_conforming_strings',
+    ];
+
+    private const TRANSACTION_STATUS = [
+        \PGSQL_TRANSACTION_IDLE => 'PGSQL_TRANSACTION_IDLE',
+        \PGSQL_TRANSACTION_ACTIVE => 'PGSQL_TRANSACTION_ACTIVE',
+        \PGSQL_TRANSACTION_INTRANS => 'PGSQL_TRANSACTION_INTRANS',
+        \PGSQL_TRANSACTION_INERROR => 'PGSQL_TRANSACTION_INERROR',
+        \PGSQL_TRANSACTION_UNKNOWN => 'PGSQL_TRANSACTION_UNKNOWN',
+    ];
+
+    private const RESULT_STATUS = [
+        \PGSQL_EMPTY_QUERY => 'PGSQL_EMPTY_QUERY',
+        \PGSQL_COMMAND_OK => 'PGSQL_COMMAND_OK',
+        \PGSQL_TUPLES_OK => 'PGSQL_TUPLES_OK',
+        \PGSQL_COPY_OUT => 'PGSQL_COPY_OUT',
+        \PGSQL_COPY_IN => 'PGSQL_COPY_IN',
+        \PGSQL_BAD_RESPONSE => 'PGSQL_BAD_RESPONSE',
+        \PGSQL_NONFATAL_ERROR => 'PGSQL_NONFATAL_ERROR',
+        \PGSQL_FATAL_ERROR => 'PGSQL_FATAL_ERROR',
+    ];
+
+    private const DIAG_CODES = [
+        'severity' => \PGSQL_DIAG_SEVERITY,
+        'sqlstate' => \PGSQL_DIAG_SQLSTATE,
+        'message' => \PGSQL_DIAG_MESSAGE_PRIMARY,
+        'detail' => \PGSQL_DIAG_MESSAGE_DETAIL,
+        'hint' => \PGSQL_DIAG_MESSAGE_HINT,
+        'statement position' => \PGSQL_DIAG_STATEMENT_POSITION,
+        'internal position' => \PGSQL_DIAG_INTERNAL_POSITION,
+        'internal query' => \PGSQL_DIAG_INTERNAL_QUERY,
+        'context' => \PGSQL_DIAG_CONTEXT,
+        'file' => \PGSQL_DIAG_SOURCE_FILE,
+        'line' => \PGSQL_DIAG_SOURCE_LINE,
+        'function' => \PGSQL_DIAG_SOURCE_FUNCTION,
+    ];
+
+    /**
+     * @return array
+     */
+    public static function castLargeObject($lo, array $a, Stub $stub, bool $isNested)
+    {
+        $a['seek position'] = pg_lo_tell($lo);
+
+        return $a;
+    }
+
+    /**
+     * @return array
+     */
+    public static function castLink($link, array $a, Stub $stub, bool $isNested)
+    {
+        $a['status'] = pg_connection_status($link);
+        $a['status'] = new ConstStub(\PGSQL_CONNECTION_OK === $a['status'] ? 'PGSQL_CONNECTION_OK' : 'PGSQL_CONNECTION_BAD', $a['status']);
+        $a['busy'] = pg_connection_busy($link);
+
+        $a['transaction'] = pg_transaction_status($link);
+        if (isset(self::TRANSACTION_STATUS[$a['transaction']])) {
+            $a['transaction'] = new ConstStub(self::TRANSACTION_STATUS[$a['transaction']], $a['transaction']);
+        }
+
+        $a['pid'] = pg_get_pid($link);
+        $a['last error'] = pg_last_error($link);
+        $a['last notice'] = pg_last_notice($link);
+        $a['host'] = pg_host($link);
+        $a['port'] = pg_port($link);
+        $a['dbname'] = pg_dbname($link);
+        $a['options'] = pg_options($link);
+        $a['version'] = pg_version($link);
+
+        foreach (self::PARAM_CODES as $v) {
+            if (false !== $s = pg_parameter_status($link, $v)) {
+                $a['param'][$v] = $s;
+            }
+        }
+
+        $a['param']['client_encoding'] = pg_client_encoding($link);
+        $a['param'] = new EnumStub($a['param']);
+
+        return $a;
+    }
+
+    /**
+     * @return array
+     */
+    public static function castResult($result, array $a, Stub $stub, bool $isNested)
+    {
+        $a['num rows'] = pg_num_rows($result);
+        $a['status'] = pg_result_status($result);
+        if (isset(self::RESULT_STATUS[$a['status']])) {
+            $a['status'] = new ConstStub(self::RESULT_STATUS[$a['status']], $a['status']);
+        }
+        $a['command-completion tag'] = pg_result_status($result, \PGSQL_STATUS_STRING);
+
+        if (-1 === $a['num rows']) {
+            foreach (self::DIAG_CODES as $k => $v) {
+                $a['error'][$k] = pg_result_error_field($result, $v);
+            }
+        }
+
+        $a['affected rows'] = pg_affected_rows($result);
+        $a['last OID'] = pg_last_oid($result);
+
+        $fields = pg_num_fields($result);
+
+        for ($i = 0; $i < $fields; ++$i) {
+            $field = [
+                'name' => pg_field_name($result, $i),
+                'table' => sprintf('%s (OID: %s)', pg_field_table($result, $i), pg_field_table($result, $i, true)),
+                'type' => sprintf('%s (OID: %s)', pg_field_type($result, $i), pg_field_type_oid($result, $i)),
+                'nullable' => (bool) pg_field_is_null($result, $i),
+                'storage' => pg_field_size($result, $i).' bytes',
+                'display' => pg_field_prtlen($result, $i).' chars',
+            ];
+            if (' (OID: )' === $field['table']) {
+                $field['table'] = null;
+            }
+            if ('-1 bytes' === $field['storage']) {
+                $field['storage'] = 'variable size';
+            } elseif ('1 bytes' === $field['storage']) {
+                $field['storage'] = '1 byte';
+            }
+            if ('1 chars' === $field['display']) {
+                $field['display'] = '1 char';
+            }
+            $a['fields'][] = new EnumStub($field);
+        }
+
+        return $a;
+    }
+}