Allow configuring a different parent directory for .aws

src/AbstractConfigurationProvider.php

@@ -85,6 +85,14 @@ public static function chain()
      */
     protected static function getHomeDir()
     {
+        // Allow the ".aws" folder containing configuration and credentials to
+        // exist in another location. In some setups, this allows both the web
+        // server user (e.g. actions taken via a website UI) and the application
+        // user (e.g. actions taken via CLI) to properly work.
+        if ($homeDir = getenv('AWS_HOME')) {
+            return $homeDir;
+        }
+
         // On Linux/Unix-like systems, use the HOME environment variable
         if ($homeDir = getenv('HOME')) {
             return $homeDir;

src/Configuration/ConfigurationResolver.php

@@ -154,6 +154,14 @@ public static function ini(
      */
     private static function getHomeDir()
     {
+        // Allow the ".aws" folder containing configuration and credentials to
+        // exist in another location. In some setups, this allows both the web
+        // server user (e.g. actions taken via a website UI) and the application
+        // user (e.g. actions taken via CLI) to properly work.
+        if ($homeDir = getenv('AWS_HOME')) {
+            return $homeDir;
+        }
+
         // On Linux/Unix-like systems, use the HOME environment variable
         if ($homeDir = getenv('HOME')) {
             return $homeDir;

src/Credentials/CredentialProvider.php

@@ -736,6 +736,14 @@ private static function loadRoleProfile(
      */
     private static function getHomeDir()
     {
+        // Allow the ".aws" folder containing configuration and credentials to
+        // exist in another location. In some setups, this allows both the web
+        // server user (e.g. actions taken via a website UI) and the application
+        // user (e.g. actions taken via CLI) to properly work.
+        if ($homeDir = getenv('AWS_HOME')) {
+            return $homeDir;
+        }
+
         // On Linux/Unix-like systems, use the HOME environment variable
         if ($homeDir = getenv('HOME')) {
             return $homeDir;

src/Token/ParsesIniTrait.php

@@ -30,6 +30,14 @@ private static function loadProfiles($filename)
      */
     private static function getHomeDir()
     {
+        // Allow the ".aws" folder containing configuration and credentials to
+        // exist in another location. In some setups, this allows both the web
+        // server user (e.g. actions taken via a website UI) and the application
+        // user (e.g. actions taken via CLI) to properly work.
+        if ($homeDir = getenv('AWS_HOME')) {
+            return $homeDir;
+        }
+
         // On Linux/Unix-like systems, use the HOME environment variable
         if ($homeDir = getenv('HOME')) {
             return $homeDir;