Drop file_exists check for _FILE variables (#2234)

* Drop file_exists check for _FILE variables

A PHP warning is generated if the file does not exist.
Otherwise there is no indicator why the variable is not used.

Signed-off-by: J0WI <J0WI@users.noreply.github.com>

* fixup: typo in smtp.config.php

Signed-off-by: Josh <josh.t.richards@gmail.com>

---------

Signed-off-by: J0WI <J0WI@users.noreply.github.com>
Signed-off-by: Josh <josh.t.richards@gmail.com>
Co-authored-by: Josh <josh.t.richards@gmail.com>

Author: J0WI

.config/redis.config.php

@@ -5,7 +5,7 @@
     'memcache.locking' => '\OC\Memcache\Redis',
     'redis' => array(
       'host' => getenv('REDIS_HOST'),
-      'password' => getenv('REDIS_HOST_PASSWORD_FILE') && file_exists(getenv('REDIS_HOST_PASSWORD_FILE')) ? trim(file_get_contents(getenv('REDIS_HOST_PASSWORD_FILE'))) : (string) getenv('REDIS_HOST_PASSWORD'),
+      'password' => getenv('REDIS_HOST_PASSWORD_FILE') ? trim(file_get_contents(getenv('REDIS_HOST_PASSWORD_FILE'))) : (string) getenv('REDIS_HOST_PASSWORD'),
     ),
   );
 

.config/s3.config.php

@@ -24,23 +24,23 @@
     )
   );
 
-  if (getenv('OBJECTSTORE_S3_KEY_FILE') && file_exists(getenv('OBJECTSTORE_S3_KEY_FILE'))) {
+  if (getenv('OBJECTSTORE_S3_KEY_FILE')) {
     $CONFIG['objectstore']['arguments']['key'] = trim(file_get_contents(getenv('OBJECTSTORE_S3_KEY_FILE')));
   } elseif (getenv('OBJECTSTORE_S3_KEY')) {
     $CONFIG['objectstore']['arguments']['key'] = getenv('OBJECTSTORE_S3_KEY');
   } else {
     $CONFIG['objectstore']['arguments']['key'] = '';
   }
 
-  if (getenv('OBJECTSTORE_S3_SECRET_FILE') && file_exists(getenv('OBJECTSTORE_S3_SECRET_FILE'))) {
+  if (getenv('OBJECTSTORE_S3_SECRET_FILE')) {
     $CONFIG['objectstore']['arguments']['secret'] = trim(file_get_contents(getenv('OBJECTSTORE_S3_SECRET_FILE')));
   } elseif (getenv('OBJECTSTORE_S3_SECRET')) {
     $CONFIG['objectstore']['arguments']['secret'] = getenv('OBJECTSTORE_S3_SECRET');
   } else {
     $CONFIG['objectstore']['arguments']['secret'] = '';
   }
 
-  if (getenv('OBJECTSTORE_S3_SSE_C_KEY_FILE') && file_exists(getenv('OBJECTSTORE_S3_SSE_C_KEY_FILE'))) {
+  if (getenv('OBJECTSTORE_S3_SSE_C_KEY_FILE')) {
     $CONFIG['objectstore']['arguments']['sse_c_key'] = trim(file_get_contents(getenv('OBJECTSTORE_S3_SSE_C_KEY_FILE')));
   } elseif (getenv('OBJECTSTORE_S3_SSE_C_KEY')) {
     $CONFIG['objectstore']['arguments']['sse_c_key'] = getenv('OBJECTSTORE_S3_SSE_C_KEY');

.config/smtp.config.php

@@ -5,14 +5,14 @@
     'mail_smtphost' => getenv('SMTP_HOST'),
     'mail_smtpport' => getenv('SMTP_PORT') ?: (getenv('SMTP_SECURE') ? 465 : 25),
     'mail_smtpsecure' => getenv('SMTP_SECURE') ?: '',
-    'mail_smtpauth' => getenv('SMTP_NAME') && (getenv('SMTP_PASSWORD') || (getenv('SMTP_PASSWORD_FILE') && file_exists(getenv('SMTP_PASSWORD_FILE')))),
+    'mail_smtpauth' => getenv('SMTP_NAME') && (getenv('SMTP_PASSWORD') || getenv('SMTP_PASSWORD_FILE')),
     'mail_smtpauthtype' => getenv('SMTP_AUTHTYPE') ?: 'LOGIN',
     'mail_smtpname' => getenv('SMTP_NAME') ?: '',
     'mail_from_address' => getenv('MAIL_FROM_ADDRESS'),
     'mail_domain' => getenv('MAIL_DOMAIN'),
   );
 
-  if (getenv('SMTP_PASSWORD_FILE') && file_exists(getenv('SMTP_PASSWORD_FILE'))) {
+  if (getenv('SMTP_PASSWORD_FILE')) {
       $CONFIG['mail_smtppassword'] = trim(file_get_contents(getenv('SMTP_PASSWORD_FILE')));
   } elseif (getenv('SMTP_PASSWORD')) {
       $CONFIG['mail_smtppassword'] = getenv('SMTP_PASSWORD');