feat: add S3-compatible storage provider (MinIO, Ceph, R2, etc.)

Adds a new 'S3-Compatible Storage' provider that works with any
S3-API-compatible object storage service, including MinIO, Ceph,
Cloudflare R2, Backblaze B2, and others.

Changes:
- New provider class: classes/providers/storage/s3-compatible-provider.php
  - Provider key: s3compatible
  - Reads user-configured endpoint URL from settings
  - Uses path-style URL access (required by most S3-compatible services)
  - Supports credentials via AS3CF_S3COMPAT_ACCESS_KEY_ID /
    AS3CF_S3COMPAT_SECRET_ACCESS_KEY wp-config.php constants
  - Disables AWS-specific features (Block Public Access, Object Ownership)
- New provider SVG icons (s3compatible.svg, -link.svg, -round.svg)
- Registered provider in main plugin class with endpoint setting support
- Updated StorageProviderSubPage to show endpoint URL input for S3-compatible
- Built pro settings bundle with rollup (Svelte 4.2.19)
- Added package.json and updated rollup.config.mjs for pro-only builds

vendor/Aws3/Aws/Endpoint/EndpointProvider.php

@@ -0,0 +1,89 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint;
+
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\Exception\UnresolvedEndpointException;
+/**
+ * Endpoint providers.
+ *
+ * An endpoint provider is a function that accepts a hash of endpoint options,
+ * including but not limited to "service" and "region" key value pairs. The
+ * endpoint provider function returns a hash of endpoint data, which MUST
+ * include an "endpoint" key value pair that represents the resolved endpoint
+ * or NULL if an endpoint cannot be determined.
+ *
+ * You can wrap your calls to an endpoint provider with the
+ * {@see EndpointProvider::resolve} function to ensure that an endpoint hash is
+ * created. If an endpoint hash is not created, then the resolve() function
+ * will throw an {@see Aws\Exception\UnresolvedEndpointException}.
+ *
+ *     use Aws\Endpoint\EndpointProvider;
+ *     $provider = EndpointProvider::defaultProvider();
+ *     // Returns an array or NULL.
+ *     $endpoint = $provider(['service' => 'ec2', 'region' => 'us-west-2']);
+ *     // Returns an endpoint array or throws.
+ *     $endpoint = EndpointProvider::resolve($provider, [
+ *         'service' => 'ec2',
+ *         'region'  => 'us-west-2'
+ *     ]);
+ *
+ * You can compose multiple providers into a single provider using
+ * {@see Aws\or_chain}. This function accepts providers as arguments and
+ * returns a new function that will invoke each provider until a non-null value
+ * is returned.
+ *
+ *     $a = function (array $args) {
+ *         if ($args['region'] === 'my-test-region') {
+ *             return ['endpoint' => 'http://localhost:123/api'];
+ *         }
+ *     };
+ *     $b = EndpointProvider::defaultProvider();
+ *     $c = \Aws\or_chain($a, $b);
+ *     $config = ['service' => 'ec2', 'region' => 'my-test-region'];
+ *     $res = $c($config);  // $a handles this.
+ *     $config['region'] = 'us-west-2';
+ *     $res = $c($config); // $b handles this.
+ */
+class EndpointProvider
+{
+    /**
+     * Resolves and endpoint provider and ensures a non-null return value.
+     *
+     * @param callable $provider Provider function to invoke.
+     * @param array    $args     Endpoint arguments to pass to the provider.
+     *
+     * @return array
+     * @throws UnresolvedEndpointException
+     */
+    public static function resolve(callable $provider, array $args = [])
+    {
+        $result = $provider($args);
+        if (\is_array($result)) {
+            return $result;
+        }
+        throw new UnresolvedEndpointException('Unable to resolve an endpoint using the provider arguments: ' . \json_encode($args) . '. Note: you can provide an "endpoint" ' . 'option to a client constructor to bypass invoking an endpoint ' . 'provider.');
+    }
+    /**
+     * Creates and returns the default SDK endpoint provider.
+     *
+     * @deprecated Use an instance of \Aws\Endpoint\Partition instead.
+     *
+     * @return callable
+     */
+    public static function defaultProvider()
+    {
+        return PartitionEndpointProvider::defaultProvider();
+    }
+    /**
+     * Creates and returns an endpoint provider that uses patterns from an
+     * array.
+     *
+     * @param array $patterns Endpoint patterns
+     *
+     * @return callable
+     */
+    public static function patterns(array $patterns)
+    {
+        return new PatternEndpointProvider($patterns);
+    }
+}

vendor/Aws3/Aws/Endpoint/Partition.php

@@ -0,0 +1,210 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint;
+
+use ArrayAccess;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\HasDataTrait;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\Sts\RegionalEndpoints\ConfigurationProvider;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\S3\RegionalEndpoint\ConfigurationProvider as S3ConfigurationProvider;
+use InvalidArgumentException as Iae;
+/**
+ * Default implementation of an AWS partition.
+ */
+final class Partition implements ArrayAccess, PartitionInterface
+{
+    use HasDataTrait;
+    private $stsLegacyGlobalRegions = ['ap-northeast-1', 'ap-south-1', 'ap-southeast-1', 'ap-southeast-2', 'aws-global', 'ca-central-1', 'eu-central-1', 'eu-north-1', 'eu-west-1', 'eu-west-2', 'eu-west-3', 'sa-east-1', 'us-east-1', 'us-east-2', 'us-west-1', 'us-west-2'];
+    /**
+     * The partition constructor accepts the following options:
+     *
+     * - `partition`: (string, required) The partition name as specified in an
+     *   ARN (e.g., `aws`)
+     * - `partitionName`: (string) The human readable name of the partition
+     *   (e.g., "AWS Standard")
+     * - `dnsSuffix`: (string, required) The DNS suffix of the partition. This
+     *   value is used to determine how endpoints in the partition are resolved.
+     * - `regionRegex`: (string) A PCRE regular expression that specifies the
+     *   pattern that region names in the endpoint adhere to.
+     * - `regions`: (array, required) A map of the regions in the partition.
+     *   Each key is the region as present in a hostname (e.g., `us-east-1`),
+     *   and each value is a structure containing region information.
+     * - `defaults`: (array) A map of default key value pairs to apply to each
+     *   endpoint of the partition. Any value in an `endpoint` definition will
+     *   supersede any values specified in `defaults`.
+     * - `services`: (array, required) A map of service endpoint prefix name
+     *   (the value found in a hostname) to information about the service.
+     *
+     * @param array $definition
+     *
+     * @throws Iae if any required options are missing
+     */
+    public function __construct(array $definition)
+    {
+        foreach (['partition', 'regions', 'services', 'dnsSuffix'] as $key) {
+            if (!isset($definition[$key])) {
+                throw new Iae("Partition missing required {$key} field");
+            }
+        }
+        $this->data = $definition;
+    }
+    public function getName()
+    {
+        return $this->data['partition'];
+    }
+    /**
+     * @internal
+     * @return mixed
+     */
+    public function getDnsSuffix()
+    {
+        return $this->data['dnsSuffix'];
+    }
+    public function isRegionMatch($region, $service)
+    {
+        if (isset($this->data['regions'][$region]) || isset($this->data['services'][$service]['endpoints'][$region])) {
+            return \true;
+        }
+        if (isset($this->data['regionRegex'])) {
+            return (bool) \preg_match("@{$this->data['regionRegex']}@", $region);
+        }
+        return \false;
+    }
+    public function getAvailableEndpoints($service, $allowNonRegionalEndpoints = \false)
+    {
+        if ($this->isServicePartitionGlobal($service)) {
+            return [$this->getPartitionEndpoint($service)];
+        }
+        if (isset($this->data['services'][$service]['endpoints'])) {
+            $serviceRegions = \array_keys($this->data['services'][$service]['endpoints']);
+            return $allowNonRegionalEndpoints ? $serviceRegions : \array_intersect($serviceRegions, \array_keys($this->data['regions']));
+        }
+        return [];
+    }
+    public function __invoke(array $args = [])
+    {
+        $service = isset($args['service']) ? $args['service'] : '';
+        $region = isset($args['region']) ? $args['region'] : '';
+        $scheme = isset($args['scheme']) ? $args['scheme'] : 'https';
+        $options = isset($args['options']) ? $args['options'] : [];
+        $data = $this->getEndpointData($service, $region, $options);
+        $variant = $this->getVariant($options, $data);
+        if (isset($variant['hostname'])) {
+            $template = $variant['hostname'];
+        } else {
+            $template = isset($data['hostname']) ? $data['hostname'] : '';
+        }
+        $dnsSuffix = isset($variant['dnsSuffix']) ? $variant['dnsSuffix'] : $this->data['dnsSuffix'];
+        return ['endpoint' => "{$scheme}://" . $this->formatEndpoint($template, $service, $region, $dnsSuffix), 'signatureVersion' => $this->getSignatureVersion($data), 'signingRegion' => isset($data['credentialScope']['region']) ? $data['credentialScope']['region'] : $region, 'signingName' => isset($data['credentialScope']['service']) ? $data['credentialScope']['service'] : $service];
+    }
+    private function getEndpointData($service, $region, $options)
+    {
+        $defaultRegion = $this->resolveRegion($service, $region, $options);
+        $data = isset($this->data['services'][$service]['endpoints'][$defaultRegion]) ? $this->data['services'][$service]['endpoints'][$defaultRegion] : [];
+        $data += isset($this->data['services'][$service]['defaults']) ? $this->data['services'][$service]['defaults'] : [];
+        $data += isset($this->data['defaults']) ? $this->data['defaults'] : [];
+        return $data;
+    }
+    private function getSignatureVersion(array $data)
+    {
+        static $supportedBySdk = ['s3v4', 'v4', 'anonymous'];
+        $possibilities = \array_intersect($supportedBySdk, isset($data['signatureVersions']) ? $data['signatureVersions'] : ['v4']);
+        return \array_shift($possibilities);
+    }
+    private function resolveRegion($service, $region, $options)
+    {
+        if (isset($this->data['services'][$service]['endpoints'][$region]) && $this->isFipsEndpointUsed($region)) {
+            return $region;
+        }
+        if ($this->isServicePartitionGlobal($service) || $this->isStsLegacyEndpointUsed($service, $region, $options) || $this->isS3LegacyEndpointUsed($service, $region, $options)) {
+            return $this->getPartitionEndpoint($service);
+        }
+        return $region;
+    }
+    private function isServicePartitionGlobal($service)
+    {
+        return isset($this->data['services'][$service]['isRegionalized']) && \false === $this->data['services'][$service]['isRegionalized'] && isset($this->data['services'][$service]['partitionEndpoint']);
+    }
+    /**
+     * STS legacy endpoints used for valid regions unless option is explicitly
+     * set to 'regional'
+     *
+     * @param string $service
+     * @param string $region
+     * @param array $options
+     * @return bool
+     */
+    private function isStsLegacyEndpointUsed($service, $region, $options)
+    {
+        return $service === 'sts' && \in_array($region, $this->stsLegacyGlobalRegions) && (empty($options['sts_regional_endpoints']) || ConfigurationProvider::unwrap($options['sts_regional_endpoints'])->getEndpointsType() !== 'regional');
+    }
+    /**
+     * S3 legacy us-east-1 endpoint used for valid regions unless option is explicitly
+     * set to 'regional'
+     *
+     * @param string $service
+     * @param string $region
+     * @param array $options
+     * @return bool
+     */
+    private function isS3LegacyEndpointUsed($service, $region, $options)
+    {
+        return $service === 's3' && $region === 'us-east-1' && (empty($options['s3_us_east_1_regional_endpoint']) || S3ConfigurationProvider::unwrap($options['s3_us_east_1_regional_endpoint'])->getEndpointsType() !== 'regional');
+    }
+    private function getPartitionEndpoint($service)
+    {
+        return $this->data['services'][$service]['partitionEndpoint'];
+    }
+    private function formatEndpoint($template, $service, $region, $dnsSuffix)
+    {
+        return \strtr($template, ['{service}' => $service, '{region}' => $region, '{dnsSuffix}' => $dnsSuffix]);
+    }
+    /**
+     * @param $region
+     * @return bool
+     */
+    private function isFipsEndpointUsed($region)
+    {
+        return \strpos($region, "fips") !== \false;
+    }
+    /**
+     * @param array $options
+     * @param array $data
+     * @return array
+     */
+    private function getVariant(array $options, array $data)
+    {
+        $variantTags = [];
+        if (isset($options['use_fips_endpoint'])) {
+            $useFips = $options['use_fips_endpoint'];
+            if (\is_bool($useFips)) {
+                $useFips && ($variantTags[] = 'fips');
+            } elseif ($useFips->isUseFipsEndpoint()) {
+                $variantTags[] = 'fips';
+            }
+        }
+        if (isset($options['use_dual_stack_endpoint'])) {
+            $useDualStack = $options['use_dual_stack_endpoint'];
+            if (\is_bool($useDualStack)) {
+                $useDualStack && ($variantTags[] = 'dualstack');
+            } elseif ($useDualStack->isUseDualStackEndpoint()) {
+                $variantTags[] = 'dualstack';
+            }
+        }
+        if (!empty($variantTags)) {
+            if (isset($data['variants'])) {
+                foreach ($data['variants'] as $variant) {
+                    if (\array_count_values($variant['tags']) == \array_count_values($variantTags)) {
+                        return $variant;
+                    }
+                }
+            }
+            if (isset($this->data['defaults']['variants'])) {
+                foreach ($this->data['defaults']['variants'] as $variant) {
+                    if (\array_count_values($variant['tags']) == \array_count_values($variantTags)) {
+                        return $variant;
+                    }
+                }
+            }
+        }
+    }
+}

vendor/Aws3/Aws/Endpoint/PartitionEndpointProvider.php

@@ -0,0 +1,113 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint;
+
+use DeliciousBrains\WP_Offload_Media\Aws3\JmesPath\Env;
+class PartitionEndpointProvider
+{
+    /** @var Partition[] */
+    private $partitions;
+    /** @var string */
+    private $defaultPartition;
+    /** @var array  */
+    private $options;
+    /**
+     * The 'options' parameter accepts the following arguments:
+     *
+     * - sts_regional_endpoints: For STS legacy regions, set to 'regional' to
+     *   use regional endpoints, 'legacy' to use the legacy global endpoint.
+     *   Defaults to 'legacy'.
+     * - s3_us_east_1_regional_endpoint: For S3 us-east-1 region, set to 'regional'
+     *   to use the regional endpoint, 'legacy' to use the legacy global endpoint.
+     *   Defaults to 'legacy'.
+     *
+     * @param array $partitions
+     * @param string $defaultPartition
+     * @param array $options
+     */
+    public function __construct(array $partitions, $defaultPartition = 'aws', $options = [])
+    {
+        $this->partitions = \array_map(function (array $definition) {
+            return new Partition($definition);
+        }, \array_values($partitions));
+        $this->defaultPartition = $defaultPartition;
+        $this->options = $options;
+    }
+    public function __invoke(array $args = [])
+    {
+        $partition = $this->getPartition(isset($args['region']) ? $args['region'] : '', isset($args['service']) ? $args['service'] : '');
+        $args['options'] = $this->options;
+        return $partition($args);
+    }
+    /**
+     * Returns the partition containing the provided region or the default
+     * partition if no match is found.
+     *
+     * @param string $region
+     * @param string $service
+     *
+     * @return Partition
+     */
+    public function getPartition($region, $service)
+    {
+        foreach ($this->partitions as $partition) {
+            if ($partition->isRegionMatch($region, $service)) {
+                return $partition;
+            }
+        }
+        return $this->getPartitionByName($this->defaultPartition);
+    }
+    /**
+     * Returns the partition with the provided name or null if no partition with
+     * the provided name can be found.
+     *
+     * @param string $name
+     *
+     * @return Partition|null
+     */
+    public function getPartitionByName($name)
+    {
+        foreach ($this->partitions as $partition) {
+            if ($name === $partition->getName()) {
+                return $partition;
+            }
+        }
+    }
+    /**
+     * Creates and returns the default SDK partition provider.
+     *
+     * @param array $options
+     * @return PartitionEndpointProvider
+     */
+    public static function defaultProvider($options = [])
+    {
+        $data = \DeliciousBrains\WP_Offload_Media\Aws3\Aws\load_compiled_json(__DIR__ . '/../data/endpoints.json');
+        $prefixData = \DeliciousBrains\WP_Offload_Media\Aws3\Aws\load_compiled_json(__DIR__ . '/../data/endpoints_prefix_history.json');
+        $mergedData = self::mergePrefixData($data, $prefixData);
+        return new self($mergedData['partitions'], 'aws', $options);
+    }
+    /**
+     * Copy endpoint data for other prefixes used by a given service
+     *
+     * @param $data
+     * @param $prefixData
+     * @return array
+     */
+    public static function mergePrefixData($data, $prefixData)
+    {
+        $prefixGroups = $prefixData['prefix-groups'];
+        foreach ($data["partitions"] as $index => $partition) {
+            foreach ($prefixGroups as $current => $old) {
+                $serviceData = Env::search("services.\"{$current}\"", $partition);
+                if (!empty($serviceData)) {
+                    foreach ($old as $prefix) {
+                        if (empty(Env::search("services.\"{$prefix}\"", $partition))) {
+                            $data["partitions"][$index]["services"][$prefix] = $serviceData;
+                        }
+                    }
+                }
+            }
+        }
+        return $data;
+    }
+}

vendor/Aws3/Aws/Endpoint/PartitionInterface.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint;
+
+/**
+ * Represents a section of the AWS cloud.
+ */
+interface PartitionInterface
+{
+    /**
+     * Returns the partition's short name, e.g., 'aws,' 'aws-cn,' or
+     * 'aws-us-gov.'
+     *
+     * @return string
+     */
+    public function getName();
+    /**
+     * Determine if this partition contains the provided region. Include the
+     * name of the service to inspect non-regional endpoints
+     *
+     * @param string $region
+     * @param string $service
+     *
+     * @return bool
+     */
+    public function isRegionMatch($region, $service);
+    /**
+     * Return the endpoints supported by a given service.
+     *
+     * @param string    $service                    Identifier of the service
+     *                                              whose endpoints should be
+     *                                              listed (e.g., 's3' or 'ses')
+     * @param bool      $allowNonRegionalEndpoints  Set to `true` to include
+     *                                              endpoints that are not AWS
+     *                                              regions (e.g., 'local' for
+     *                                              DynamoDB or
+     *                                              'fips-us-gov-west-1' for S3)
+     * 
+     * @return string[]
+     */
+    public function getAvailableEndpoints($service, $allowNonRegionalEndpoints = \false);
+    /**
+     * A partition must be invokable as an endpoint provider.
+     *
+     * @see EndpointProvider
+     * 
+     * @param array $args
+     * @return array
+     */
+    public function __invoke(array $args = []);
+}

vendor/Aws3/Aws/Endpoint/PatternEndpointProvider.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint;
+
+/**
+ * Provides endpoints based on an endpoint pattern configuration array.
+ */
+class PatternEndpointProvider
+{
+    /** @var array */
+    private $patterns;
+    /**
+     * @param array $patterns Hash of endpoint patterns mapping to endpoint
+     *                        configurations.
+     */
+    public function __construct(array $patterns)
+    {
+        $this->patterns = $patterns;
+    }
+    public function __invoke(array $args = [])
+    {
+        $service = isset($args['service']) ? $args['service'] : '';
+        $region = isset($args['region']) ? $args['region'] : '';
+        $keys = ["{$region}/{$service}", "{$region}/*", "*/{$service}", "*/*"];
+        foreach ($keys as $key) {
+            if (isset($this->patterns[$key])) {
+                return $this->expand($this->patterns[$key], isset($args['scheme']) ? $args['scheme'] : 'https', $service, $region);
+            }
+        }
+        return null;
+    }
+    private function expand(array $config, $scheme, $service, $region)
+    {
+        $config['endpoint'] = $scheme . '://' . \strtr($config['endpoint'], ['{service}' => $service, '{region}' => $region]);
+        return $config;
+    }
+}

vendor/Aws3/Aws/Endpoint/UseDualstackEndpoint/Configuration.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseDualstackEndpoint;
+
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseDualstackEndpoint\Exception\ConfigurationException;
+class Configuration implements ConfigurationInterface
+{
+    private $useDualstackEndpoint;
+    public function __construct($useDualstackEndpoint, $region)
+    {
+        $this->useDualstackEndpoint = Aws\boolean_value($useDualstackEndpoint);
+        if (\is_null($this->useDualstackEndpoint)) {
+            throw new ConfigurationException("'use_dual_stack_endpoint' config option" . " must be a boolean value.");
+        }
+        if ($this->useDualstackEndpoint == \true && (\strpos($region, "iso-") !== \false || \strpos($region, "-iso") !== \false)) {
+            throw new ConfigurationException("Dual-stack is not supported in ISO regions");
+        }
+    }
+    /**
+     * {@inheritdoc}
+     */
+    public function isUseDualstackEndpoint()
+    {
+        return $this->useDualstackEndpoint;
+    }
+    /**
+     * {@inheritdoc}
+     */
+    public function toArray()
+    {
+        return ['use_dual_stack_endpoint' => $this->isUseDualstackEndpoint()];
+    }
+}

vendor/Aws3/Aws/Endpoint/UseDualstackEndpoint/ConfigurationInterface.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseDualstackEndpoint;
+
+interface ConfigurationInterface
+{
+    /**
+     * Returns whether or not to use a DUALSTACK endpoint
+     *
+     * @return bool
+     */
+    public function isUseDualstackEndpoint();
+    /**
+     * Returns the configuration as an associative array
+     *
+     * @return array
+     */
+    public function toArray();
+}

vendor/Aws3/Aws/Endpoint/UseDualstackEndpoint/ConfigurationProvider.php

@@ -0,0 +1,145 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseDualstackEndpoint;
+
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\AbstractConfigurationProvider;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\CacheInterface;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\ConfigurationProviderInterface;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseDualstackEndpoint\Exception\ConfigurationException;
+use DeliciousBrains\WP_Offload_Media\Aws3\GuzzleHttp\Promise;
+/**
+ * A configuration provider is a function that returns a promise that is
+ * fulfilled with a {@see \Aws\Endpoint\UseDualstackEndpoint\onfigurationInterface}
+ * or rejected with an {@see \Aws\Endpoint\UseDualstackEndpoint\ConfigurationException}.
+ *
+ * <code>
+ * use Aws\Endpoint\UseDualstackEndpoint\ConfigurationProvider;
+ * $provider = ConfigurationProvider::defaultProvider();
+ * // Returns a ConfigurationInterface or throws.
+ * $config = $provider()->wait();
+ * </code>
+ *
+ * Configuration providers can be composed to create configuration using
+ * conditional logic that can create different configurations in different
+ * environments. You can compose multiple providers into a single provider using
+ * {@see Aws\Endpoint\UseDualstackEndpoint\ConfigurationProvider::chain}. This function
+ * accepts providers as variadic arguments and returns a new function that will
+ * invoke each provider until a successful configuration is returned.
+ *
+ * <code>
+ * // First try an INI file at this location.
+ * $a = ConfigurationProvider::ini(null, '/path/to/file.ini');
+ * // Then try an INI file at this location.
+ * $b = ConfigurationProvider::ini(null, '/path/to/other-file.ini');
+ * // Then try loading from environment variables.
+ * $c = ConfigurationProvider::env();
+ * // Combine the three providers together.
+ * $composed = ConfigurationProvider::chain($a, $b, $c);
+ * // Returns a promise that is fulfilled with a configuration or throws.
+ * $promise = $composed();
+ * // Wait on the configuration to resolve.
+ * $config = $promise->wait();
+ * </code>
+ */
+class ConfigurationProvider extends AbstractConfigurationProvider implements ConfigurationProviderInterface
+{
+    const ENV_USE_DUAL_STACK_ENDPOINT = 'AWS_USE_DUALSTACK_ENDPOINT';
+    const INI_USE_DUAL_STACK_ENDPOINT = 'use_dualstack_endpoint';
+    public static $cacheKey = 'aws_cached_use_dualstack_endpoint_config';
+    protected static $interfaceClass = ConfigurationInterface::class;
+    protected static $exceptionClass = ConfigurationException::class;
+    /**
+     * Create a default config provider that first checks for environment
+     * variables, then checks for a specified profile in the environment-defined
+     * config file location (env variable is 'AWS_CONFIG_FILE', file location
+     * defaults to ~/.aws/config), then checks for the "default" profile in the
+     * environment-defined config file location, and failing those uses a default
+     * fallback set of configuration options.
+     *
+     * This provider is automatically wrapped in a memoize function that caches
+     * previously provided config options.
+     *
+     * @param array $config
+     *
+     * @return callable
+     */
+    public static function defaultProvider(array $config = [])
+    {
+        $region = $config['region'];
+        $configProviders = [self::env($region)];
+        if (!isset($config['use_aws_shared_config_files']) || $config['use_aws_shared_config_files'] != \false) {
+            $configProviders[] = self::ini($region);
+        }
+        $configProviders[] = self::fallback($region);
+        $memo = self::memoize(\call_user_func_array([ConfigurationProvider::class, 'chain'], $configProviders));
+        if (isset($config['use_dual_stack_endpoint']) && $config['use_dual_stack_endpoint'] instanceof CacheInterface) {
+            return self::cache($memo, $config['use_dual_stack_endpoint'], self::$cacheKey);
+        }
+        return $memo;
+    }
+    /**
+     * Provider that creates config from environment variables.
+     *
+     * @return callable
+     */
+    public static function env($region)
+    {
+        return function () use($region) {
+            // Use config from environment variables, if available
+            $useDualstackEndpoint = \getenv(self::ENV_USE_DUAL_STACK_ENDPOINT);
+            if (!empty($useDualstackEndpoint)) {
+                return Promise\Create::promiseFor(new Configuration($useDualstackEndpoint, $region));
+            }
+            return self::reject('Could not find environment variable config' . ' in ' . self::ENV_USE_DUAL_STACK_ENDPOINT);
+        };
+    }
+    /**
+     * Config provider that creates config using a config file whose location
+     * is specified by an environment variable 'AWS_CONFIG_FILE', defaulting to
+     * ~/.aws/config if not specified
+     *
+     * @param string|null $profile  Profile to use. If not specified will use
+     *                              the "default" profile.
+     * @param string|null $filename If provided, uses a custom filename rather
+     *                              than looking in the default directory.
+     *
+     * @return callable
+     */
+    public static function ini($region, $profile = null, $filename = null)
+    {
+        $filename = $filename ?: self::getDefaultConfigFilename();
+        $profile = $profile ?: (\getenv(self::ENV_PROFILE) ?: 'default');
+        return function () use($region, $profile, $filename) {
+            if (!@\is_readable($filename)) {
+                return self::reject("Cannot read configuration from {$filename}");
+            }
+            // Use INI_SCANNER_NORMAL instead of INI_SCANNER_TYPED for PHP 5.5 compatibility
+            $data = \DeliciousBrains\WP_Offload_Media\Aws3\Aws\parse_ini_file($filename, \true, \INI_SCANNER_NORMAL);
+            if ($data === \false) {
+                return self::reject("Invalid config file: {$filename}");
+            }
+            if (!isset($data[$profile])) {
+                return self::reject("'{$profile}' not found in config file");
+            }
+            if (!isset($data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT])) {
+                return self::reject("Required use dualstack endpoint config values\n                    not present in INI profile '{$profile}' ({$filename})");
+            }
+            // INI_SCANNER_NORMAL parses false-y values as an empty string
+            if ($data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT] === "") {
+                $data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT] = \false;
+            }
+            return Promise\Create::promiseFor(new Configuration($data[$profile][self::INI_USE_DUAL_STACK_ENDPOINT], $region));
+        };
+    }
+    /**
+     * Fallback config options when other sources are not set.
+     *
+     * @return callable
+     */
+    public static function fallback($region)
+    {
+        return function () use($region) {
+            return Promise\Create::promiseFor(new Configuration(\false, $region));
+        };
+    }
+}

vendor/Aws3/Aws/Endpoint/UseDualstackEndpoint/Exception/ConfigurationException.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseDualstackEndpoint\Exception;
+
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\HasMonitoringEventsTrait;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\MonitoringEventsInterface;
+/**
+ * Represents an error interacting with configuration for useDualstackRegion
+ */
+class ConfigurationException extends \RuntimeException implements MonitoringEventsInterface
+{
+    use HasMonitoringEventsTrait;
+}

vendor/Aws3/Aws/Endpoint/UseFipsEndpoint/Configuration.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseFipsEndpoint;
+
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseFipsEndpoint\Exception\ConfigurationException;
+class Configuration implements ConfigurationInterface
+{
+    private $useFipsEndpoint;
+    public function __construct($useFipsEndpoint)
+    {
+        $this->useFipsEndpoint = Aws\boolean_value($useFipsEndpoint);
+        if (\is_null($this->useFipsEndpoint)) {
+            throw new ConfigurationException("'use_fips_endpoint' config option" . " must be a boolean value.");
+        }
+    }
+    /**
+     * {@inheritdoc}
+     */
+    public function isUseFipsEndpoint()
+    {
+        return $this->useFipsEndpoint;
+    }
+    /**
+     * {@inheritdoc}
+     */
+    public function toArray()
+    {
+        return ['use_fips_endpoint' => $this->isUseFipsEndpoint()];
+    }
+}

vendor/Aws3/Aws/Endpoint/UseFipsEndpoint/ConfigurationInterface.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseFipsEndpoint;
+
+interface ConfigurationInterface
+{
+    /**
+     * Returns whether or not to use a FIPS endpoint
+     *
+     * @return bool
+     */
+    public function isUseFipsEndpoint();
+    /**
+     * Returns the configuration as an associative array
+     *
+     * @return array
+     */
+    public function toArray();
+}

vendor/Aws3/Aws/Endpoint/UseFipsEndpoint/ConfigurationProvider.php

@@ -0,0 +1,150 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseFipsEndpoint;
+
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\AbstractConfigurationProvider;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\CacheInterface;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\ConfigurationProviderInterface;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseFipsEndpoint\Exception\ConfigurationException;
+use DeliciousBrains\WP_Offload_Media\Aws3\GuzzleHttp\Promise;
+/**
+ * A configuration provider is a function that returns a promise that is
+ * fulfilled with a {@see \Aws\Endpoint\UseFipsEndpoint\onfigurationInterface}
+ * or rejected with an {@see \Aws\Endpoint\UseFipsEndpoint\ConfigurationException}.
+ *
+ * <code>
+ * use Aws\Endpoint\UseFipsEndpoint\ConfigurationProvider;
+ * $provider = ConfigurationProvider::defaultProvider();
+ * // Returns a ConfigurationInterface or throws.
+ * $config = $provider()->wait();
+ * </code>
+ *
+ * Configuration providers can be composed to create configuration using
+ * conditional logic that can create different configurations in different
+ * environments. You can compose multiple providers into a single provider using
+ * {@see Aws\Endpoint\UseFipsEndpoint\ConfigurationProvider::chain}. This function
+ * accepts providers as variadic arguments and returns a new function that will
+ * invoke each provider until a successful configuration is returned.
+ *
+ * <code>
+ * // First try an INI file at this location.
+ * $a = ConfigurationProvider::ini(null, '/path/to/file.ini');
+ * // Then try an INI file at this location.
+ * $b = ConfigurationProvider::ini(null, '/path/to/other-file.ini');
+ * // Then try loading from environment variables.
+ * $c = ConfigurationProvider::env();
+ * // Combine the three providers together.
+ * $composed = ConfigurationProvider::chain($a, $b, $c);
+ * // Returns a promise that is fulfilled with a configuration or throws.
+ * $promise = $composed();
+ * // Wait on the configuration to resolve.
+ * $config = $promise->wait();
+ * </code>
+ */
+class ConfigurationProvider extends AbstractConfigurationProvider implements ConfigurationProviderInterface
+{
+    const ENV_USE_FIPS_ENDPOINT = 'AWS_USE_FIPS_ENDPOINT';
+    const INI_USE_FIPS_ENDPOINT = 'use_fips_endpoint';
+    public static $cacheKey = 'aws_cached_use_fips_endpoint_config';
+    protected static $interfaceClass = ConfigurationInterface::class;
+    protected static $exceptionClass = ConfigurationException::class;
+    /**
+     * Create a default config provider that first checks for environment
+     * variables, then checks for a specified profile in the environment-defined
+     * config file location (env variable is 'AWS_CONFIG_FILE', file location
+     * defaults to ~/.aws/config), then checks for the "default" profile in the
+     * environment-defined config file location, and failing those uses a default
+     * fallback set of configuration options.
+     *
+     * This provider is automatically wrapped in a memoize function that caches
+     * previously provided config options.
+     *
+     * @param array $config
+     *
+     * @return callable
+     */
+    public static function defaultProvider(array $config = [])
+    {
+        $configProviders = [self::env()];
+        if (!isset($config['use_aws_shared_config_files']) || $config['use_aws_shared_config_files'] != \false) {
+            $configProviders[] = self::ini();
+        }
+        $configProviders[] = self::fallback($config['region']);
+        $memo = self::memoize(\call_user_func_array([ConfigurationProvider::class, 'chain'], $configProviders));
+        if (isset($config['use_fips_endpoint']) && $config['use_fips_endpoint'] instanceof CacheInterface) {
+            return self::cache($memo, $config['use_fips_endpoint'], self::$cacheKey);
+        }
+        return $memo;
+    }
+    /**
+     * Provider that creates config from environment variables.
+     *
+     * @return callable
+     */
+    public static function env()
+    {
+        return function () {
+            // Use config from environment variables, if available
+            $useFipsEndpoint = \getenv(self::ENV_USE_FIPS_ENDPOINT);
+            if (!empty($useFipsEndpoint)) {
+                return Promise\Create::promiseFor(new Configuration($useFipsEndpoint));
+            }
+            return self::reject('Could not find environment variable config' . ' in ' . self::ENV_USE_FIPS_ENDPOINT);
+        };
+    }
+    /**
+     * Config provider that creates config using a config file whose location
+     * is specified by an environment variable 'AWS_CONFIG_FILE', defaulting to
+     * ~/.aws/config if not specified
+     *
+     * @param string|null $profile  Profile to use. If not specified will use
+     *                              the "default" profile.
+     * @param string|null $filename If provided, uses a custom filename rather
+     *                              than looking in the default directory.
+     *
+     * @return callable
+     */
+    public static function ini($profile = null, $filename = null)
+    {
+        $filename = $filename ?: self::getDefaultConfigFilename();
+        $profile = $profile ?: (\getenv(self::ENV_PROFILE) ?: 'default');
+        return function () use($profile, $filename) {
+            if (!@\is_readable($filename)) {
+                return self::reject("Cannot read configuration from {$filename}");
+            }
+            // Use INI_SCANNER_NORMAL instead of INI_SCANNER_TYPED for PHP 5.5 compatibility
+            $data = \DeliciousBrains\WP_Offload_Media\Aws3\Aws\parse_ini_file($filename, \true, \INI_SCANNER_NORMAL);
+            if ($data === \false) {
+                return self::reject("Invalid config file: {$filename}");
+            }
+            if (!isset($data[$profile])) {
+                return self::reject("'{$profile}' not found in config file");
+            }
+            if (!isset($data[$profile][self::INI_USE_FIPS_ENDPOINT])) {
+                return self::reject("Required use fips endpoint config values\n                    not present in INI profile '{$profile}' ({$filename})");
+            }
+            // INI_SCANNER_NORMAL parses false-y values as an empty string
+            if ($data[$profile][self::INI_USE_FIPS_ENDPOINT] === "") {
+                $data[$profile][self::INI_USE_FIPS_ENDPOINT] = \false;
+            }
+            return Promise\Create::promiseFor(new Configuration($data[$profile][self::INI_USE_FIPS_ENDPOINT]));
+        };
+    }
+    /**
+     * Fallback config options when other sources are not set.
+     *
+     * @return callable
+     */
+    public static function fallback($region)
+    {
+        return function () use($region) {
+            $isFipsPseudoRegion = \strpos($region, 'fips-') !== \false || \strpos($region, '-fips') !== \false;
+            if ($isFipsPseudoRegion) {
+                $configuration = new Configuration(\true);
+            } else {
+                $configuration = new Configuration(\false);
+            }
+            return Promise\Create::promiseFor($configuration);
+        };
+    }
+}

vendor/Aws3/Aws/Endpoint/UseFipsEndpoint/Exception/ConfigurationException.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Aws3\Aws\Endpoint\UseFipsEndpoint\Exception;
+
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\HasMonitoringEventsTrait;
+use DeliciousBrains\WP_Offload_Media\Aws3\Aws\MonitoringEventsInterface;
+/**
+ * Represents an error interacting with configuration for useFipsRegion
+ */
+class ConfigurationException extends \RuntimeException implements MonitoringEventsInterface
+{
+    use HasMonitoringEventsTrait;
+}