Some small bugfixes and updated readme (brefphp#7)

* Small bugfixes and cleanup

* Updated readme with new extensions

* cs

* Typo

Makefile

@@ -4,6 +4,7 @@ php_versions = 72 73 74
 
 docker-images:
 	PWD=pwd
+	set -e; \
 	for dir in layers/*; do \
 		for php_version in $(php_versions); do \
 			echo "###############################################"; \
@@ -21,6 +22,7 @@ layers: docker-images
 	PWD=pwd
 	rm -rf export/layer-*.zip || true
 	mkdir export/tmp
+	set -e; \
 	for dir in layers/*; do \
 		for php_version in $(php_versions); do \
 			echo "###############################################"; \

Readme.md

@@ -39,8 +39,13 @@ extension=/opt/bref-extra/amqp.so
 | ---- | ----------------------------| -------------- |
 | AMQP | `${bref:extra.amqp-php-74}` | `extension=/opt/bref-extra/amqp.so` |
 | Blackfire | `${bref:extra.blackfire-php-74}` | `extension=/opt/bref-extra/blackfire.so` |
+| GMP | `${bref:extra.gmp-php-74}` | `extension=/opt/bref-extra/gmp.so` |
+| Memcache | `${bref:extra.memcached-php-74}` | `extension=/opt/bref-extra/memcache.so` |
+| Memcached | `${bref:extra.memcached-php-74}` | `extension=/opt/bref-extra/memcached.so` |
 | Xdebug | `${bref:extra.xdebug-php-74}` | `zend_extension=/opt/bref-extra/xdebug.so` |
 
+Note that the "Memcached" layer provides both extension for [Memcache](https://pecl.php.net/package/memcache) and [Memcached](https://pecl.php.net/package/memcached). 
+
 ## Deploy new versions
 
 ```

src/Aws/LayerProvider.php

@@ -3,6 +3,7 @@
 namespace Bref\Extra\Aws;
 
 use Aws\Lambda\LambdaClient;
+use function GuzzleHttp\Promise\unwrap;
 
 /**
  * Fetches layers and details from AWS
@@ -25,7 +26,6 @@ public function __construct(array $layerNames, string $awsId)
         $this->layerNames = $layerNames;
     }
 
-
     public function listLayers(string $selectedRegion): array
     {
         $lambda = new LambdaClient([
@@ -49,8 +49,10 @@ public function listLayers(string $selectedRegion): array
         $layers = [];
         foreach ($results as $layerName => $result) {
             $versions = $result['LayerVersions'];
-            $latestVersion = end($versions);
-            $layers[$layerName] = $latestVersion['Version'];
+            if (! empty($versions)) {
+                $latestVersion = end($versions);
+                $layers[$layerName] = $latestVersion['Version'];
+            }
         }
 
         return $layers;