🐛 Fix entrypoint when AUTH_REGISTRIES is empty

Author: tiangolo

entrypoint.sh

@@ -34,32 +34,35 @@ export ALLDOMAINS=${ALLDOMAINS:1} # remove the first comma and export
 # Now handle the auth part.
 echo -n "" > /etc/nginx/docker.auth.map
 
-# Ref: https://stackoverflow.com/a/47633817/219530
-AUTH_REGISTRIES_DELIMITER=${AUTH_REGISTRIES_DELIMITER:-" "}
-s=$AUTH_REGISTRIES$AUTH_REGISTRIES_DELIMITER
-auth_array=();
-while [[ $s ]]; do
-    auth_array+=( "${s%%"$AUTH_REGISTRIES_DELIMITER"*}" );
-    s=${s#*"$AUTH_REGISTRIES_DELIMITER"};
-done
-
-AUTH_REGISTRY_DELIMITER=${AUTH_REGISTRY_DELIMITER:-":"}
-
-for ONEREGISTRY in "${auth_array[@]}"; do
-    s=$ONEREGISTRY$AUTH_REGISTRY_DELIMITER
-    registry_array=();
+# Only configure auth registries if the env var contains values
+if [ "$AUTH_REGISTRIES" ]; then
+    # Ref: https://stackoverflow.com/a/47633817/219530
+    AUTH_REGISTRIES_DELIMITER=${AUTH_REGISTRIES_DELIMITER:-" "}
+    s=$AUTH_REGISTRIES$AUTH_REGISTRIES_DELIMITER
+    auth_array=();
     while [[ $s ]]; do
-        registry_array+=( "${s%%"$AUTH_REGISTRY_DELIMITER"*}" );
-        s=${s#*"$AUTH_REGISTRY_DELIMITER"};
+        auth_array+=( "${s%%"$AUTH_REGISTRIES_DELIMITER"*}" );
+        s=${s#*"$AUTH_REGISTRIES_DELIMITER"};
     done
-    AUTH_HOST="${registry_array[0]}"
-    AUTH_USER="${registry_array[1]}"
-    AUTH_PASS="${registry_array[2]}"
-    # make base64 not wrap lines: https://superuser.com/a/1225334
-    AUTH_BASE64=$(echo -n "${AUTH_USER}:${AUTH_PASS}" | base64 | tr -d \\n )
-    echo "Adding Auth for registry '${AUTH_HOST}' with user '${AUTH_USER}'."
-    echo "\"${AUTH_HOST}\" \"${AUTH_BASE64}\";" >> /etc/nginx/docker.auth.map
-done
+
+    AUTH_REGISTRY_DELIMITER=${AUTH_REGISTRY_DELIMITER:-":"}
+
+    for ONEREGISTRY in "${auth_array[@]}"; do
+        s=$ONEREGISTRY$AUTH_REGISTRY_DELIMITER
+        registry_array=();
+        while [[ $s ]]; do
+            registry_array+=( "${s%%"$AUTH_REGISTRY_DELIMITER"*}" );
+            s=${s#*"$AUTH_REGISTRY_DELIMITER"};
+        done
+        AUTH_HOST="${registry_array[0]}"
+        AUTH_USER="${registry_array[1]}"
+        AUTH_PASS="${registry_array[2]}"
+        # make base64 not wrap lines: https://superuser.com/a/1225334
+        AUTH_BASE64=$(echo -n "${AUTH_USER}:${AUTH_PASS}" | base64 | tr -d \\n )
+        echo "Adding Auth for registry '${AUTH_HOST}' with user '${AUTH_USER}'."
+        echo "\"${AUTH_HOST}\" \"${AUTH_BASE64}\";" >> /etc/nginx/docker.auth.map
+    done
+fi
 
 echo "" > /etc/nginx/docker.verify.ssl.conf
 if [[ "a${VERIFY_SSL}" == "atrue" ]]; then