Don't log connection-uri on connection failure (#192)

An aggressive fix for #189
It simply replaces a non-empty string entirely, to avoid the difficulties
in parsing the uri and removing only the password.

src/migratus/utils.clj

@@ -87,11 +87,18 @@
   [^String s]
   (str/replace s "\\" "/"))
 
-(defn censor-password
-  "Show only first character of password if given db-spec has password"
+(defmulti censor-password class)
+
+(defmethod censor-password String [uri]
+  (if (empty? uri)
+    ""
+    "uri-censored"))
+
+(defmethod censor-password :default
   [{:keys [password] :as db-spec}]
   (if (empty? password)
     db-spec
+    ;; Show only first character of password if given db-spec has password
     (assoc db-spec
       :password (str (subs password 0 (min 1 (count password)))
                      "<censored>"))))

test/migratus/test/utils.clj

@@ -7,4 +7,6 @@
   (is (= "" (censor-password "")))
   (is (= {:password nil} (censor-password {:password nil})))
   (is (= {:password "1<censored>" :user "user"}
-         (censor-password {:password "1234" :user "user"}))))
+         (censor-password {:password "1234" :user "user"})))
+  (is (= "uri-censored"
+         (censor-password "jdbc:postgresql://fake.rds.amazonaws.com/capital_thing?user=capital_db&password=thisIsNot123ARealPass"))))