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/Dumper/ContextProvider/CliContextProvider.php

@@ -0,0 +1,32 @@
+<?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\Dumper\ContextProvider;
+
+/**
+ * Tries to provide context on CLI.
+ *
+ * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
+ */
+final class CliContextProvider implements ContextProviderInterface
+{
+    public function getContext(): ?array
+    {
+        if ('cli' !== \PHP_SAPI) {
+            return null;
+        }
+
+        return [
+            'command_line' => $commandLine = implode(' ', $_SERVER['argv'] ?? []),
+            'identifier' => hash('crc32b', $commandLine.$_SERVER['REQUEST_TIME_FLOAT']),
+        ];
+    }
+}

docker/streamline-src/vendor/symfony/var-dumper/Dumper/ContextProvider/ContextProviderInterface.php

@@ -0,0 +1,22 @@
+<?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\Dumper\ContextProvider;
+
+/**
+ * Interface to provide contextual data about dump data clones sent to a server.
+ *
+ * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
+ */
+interface ContextProviderInterface
+{
+    public function getContext(): ?array;
+}

docker/streamline-src/vendor/symfony/var-dumper/Dumper/ContextProvider/RequestContextProvider.php

@@ -0,0 +1,51 @@
+<?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\Dumper\ContextProvider;
+
+use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\VarDumper\Caster\ReflectionCaster;
+use Symfony\Component\VarDumper\Cloner\VarCloner;
+
+/**
+ * Tries to provide context from a request.
+ *
+ * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
+ */
+final class RequestContextProvider implements ContextProviderInterface
+{
+    private RequestStack $requestStack;
+    private VarCloner $cloner;
+
+    public function __construct(RequestStack $requestStack)
+    {
+        $this->requestStack = $requestStack;
+        $this->cloner = new VarCloner();
+        $this->cloner->setMaxItems(0);
+        $this->cloner->addCasters(ReflectionCaster::UNSET_CLOSURE_FILE_INFO);
+    }
+
+    public function getContext(): ?array
+    {
+        if (null === $request = $this->requestStack->getCurrentRequest()) {
+            return null;
+        }
+
+        $controller = $request->attributes->get('_controller');
+
+        return [
+            'uri' => $request->getUri(),
+            'method' => $request->getMethod(),
+            'controller' => $controller ? $this->cloner->cloneVar($controller) : $controller,
+            'identifier' => spl_object_hash($request),
+        ];
+    }
+}

docker/streamline-src/vendor/symfony/var-dumper/Dumper/ContextProvider/SourceContextProvider.php

@@ -0,0 +1,127 @@
+<?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\Dumper\ContextProvider;
+
+use Symfony\Component\ErrorHandler\ErrorRenderer\FileLinkFormatter;
+use Symfony\Component\HttpKernel\Debug\FileLinkFormatter as LegacyFileLinkFormatter;
+use Symfony\Component\VarDumper\Cloner\VarCloner;
+use Symfony\Component\VarDumper\Dumper\HtmlDumper;
+use Symfony\Component\VarDumper\VarDumper;
+use Twig\Template;
+
+/**
+ * Tries to provide context from sources (class name, file, line, code excerpt, ...).
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
+ */
+final class SourceContextProvider implements ContextProviderInterface
+{
+    private int $limit;
+    private ?string $charset;
+    private ?string $projectDir;
+    private FileLinkFormatter|LegacyFileLinkFormatter|null $fileLinkFormatter;
+
+    public function __construct(?string $charset = null, ?string $projectDir = null, FileLinkFormatter|LegacyFileLinkFormatter|null $fileLinkFormatter = null, int $limit = 9)
+    {
+        $this->charset = $charset;
+        $this->projectDir = $projectDir;
+        $this->fileLinkFormatter = $fileLinkFormatter;
+        $this->limit = $limit;
+    }
+
+    public function getContext(): ?array
+    {
+        $trace = debug_backtrace(\DEBUG_BACKTRACE_PROVIDE_OBJECT | \DEBUG_BACKTRACE_IGNORE_ARGS, $this->limit);
+
+        $file = $trace[1]['file'];
+        $line = $trace[1]['line'];
+        $name = '-' === $file || 'Standard input code' === $file ? 'Standard input code' : false;
+        $fileExcerpt = false;
+
+        for ($i = 2; $i < $this->limit; ++$i) {
+            if (isset($trace[$i]['class'], $trace[$i]['function'])
+                && 'dump' === $trace[$i]['function']
+                && VarDumper::class === $trace[$i]['class']
+            ) {
+                $file = $trace[$i]['file'] ?? $file;
+                $line = $trace[$i]['line'] ?? $line;
+
+                while (++$i < $this->limit) {
+                    if (isset($trace[$i]['function'], $trace[$i]['file']) && empty($trace[$i]['class']) && !str_starts_with($trace[$i]['function'], 'call_user_func')) {
+                        $file = $trace[$i]['file'];
+                        $line = $trace[$i]['line'];
+
+                        break;
+                    } elseif (isset($trace[$i]['object']) && $trace[$i]['object'] instanceof Template) {
+                        $template = $trace[$i]['object'];
+                        $name = $template->getTemplateName();
+                        $src = method_exists($template, 'getSourceContext') ? $template->getSourceContext()->getCode() : (method_exists($template, 'getSource') ? $template->getSource() : false);
+                        $info = $template->getDebugInfo();
+                        if (isset($info[$trace[$i - 1]['line']])) {
+                            $line = $info[$trace[$i - 1]['line']];
+                            $file = method_exists($template, 'getSourceContext') ? $template->getSourceContext()->getPath() : null;
+
+                            if ($src) {
+                                $src = explode("\n", $src);
+                                $fileExcerpt = [];
+
+                                for ($i = max($line - 3, 1), $max = min($line + 3, \count($src)); $i <= $max; ++$i) {
+                                    $fileExcerpt[] = '<li'.($i === $line ? ' class="selected"' : '').'><code>'.$this->htmlEncode($src[$i - 1]).'</code></li>';
+                                }
+
+                                $fileExcerpt = '<ol start="'.max($line - 3, 1).'">'.implode("\n", $fileExcerpt).'</ol>';
+                            }
+                        }
+                        break;
+                    }
+                }
+                break;
+            }
+        }
+
+        if (false === $name) {
+            $name = str_replace('\\', '/', $file);
+            $name = substr($name, strrpos($name, '/') + 1);
+        }
+
+        $context = ['name' => $name, 'file' => $file, 'line' => $line];
+        $context['file_excerpt'] = $fileExcerpt;
+
+        if (null !== $this->projectDir) {
+            $context['project_dir'] = $this->projectDir;
+            if (str_starts_with($file, $this->projectDir)) {
+                $context['file_relative'] = ltrim(substr($file, \strlen($this->projectDir)), \DIRECTORY_SEPARATOR);
+            }
+        }
+
+        if ($this->fileLinkFormatter && $fileLink = $this->fileLinkFormatter->format($context['file'], $context['line'])) {
+            $context['file_link'] = $fileLink;
+        }
+
+        return $context;
+    }
+
+    private function htmlEncode(string $s): string
+    {
+        $html = '';
+
+        $dumper = new HtmlDumper(function ($line) use (&$html) { $html .= $line; }, $this->charset);
+        $dumper->setDumpHeader('');
+        $dumper->setDumpBoundaries('', '');
+
+        $cloner = new VarCloner();
+        $dumper->dump($cloner->cloneVar($s));
+
+        return substr(strip_tags($html), 1, -1);
+    }
+}