From b80295a21c26b21fab5158e930448c0e63db70e7 Mon Sep 17 00:00:00 2001
From: Andrey Antukh <niwi@niwi.nz>
Date: Sun, 31 Jan 2021 19:25:26 +0100
Subject: [PATCH] :sparkles: Fix all linter issues on backend code.

---
 .clj-kondo/config.edn                      |  5 +--
 backend/src/app/cli/migrate_media.clj      |  7 ++--
 backend/src/app/db.clj                     | 12 +++----
 backend/src/app/error_reporter.clj         | 17 +++++-----
 backend/src/app/http.clj                   |  6 +---
 backend/src/app/http/assets.clj            | 11 +++---
 backend/src/app/http/auth/github.clj       | 15 ++++-----
 backend/src/app/http/auth/gitlab.clj       | 15 ++++-----
 backend/src/app/http/auth/google.clj       |  3 +-
 backend/src/app/http/errors.clj            |  1 -
 backend/src/app/http/middleware.clj        | 13 +++-----
 backend/src/app/http/session.clj           |  6 ++--
 backend/src/app/main.clj                   |  2 +-
 backend/src/app/media.clj                  |  3 --
 backend/src/app/metrics.clj                | 15 ++++-----
 backend/src/app/migrations.clj             |  5 ++-
 backend/src/app/notifications.clj          |  2 +-
 backend/src/app/redis.clj                  |  1 -
 backend/src/app/rlimits.clj                |  1 -
 backend/src/app/rpc.clj                    |  2 +-
 backend/src/app/rpc/mutations/comments.clj |  2 +-
 backend/src/app/rpc/mutations/demo.clj     |  2 +-
 backend/src/app/rpc/mutations/media.clj    |  3 +-
 backend/src/app/rpc/mutations/teams.clj    | 10 +-----
 backend/src/app/rpc/permissions.clj        |  3 +-
 backend/src/app/rpc/queries/files.clj      |  2 +-
 backend/src/app/rpc/queries/projects.clj   |  1 -
 backend/src/app/sprops.clj                 |  5 ---
 backend/src/app/srepl.clj                  |  6 ++--
 backend/src/app/storage.clj                | 14 ++++----
 backend/src/app/storage/db.clj             | 16 +++------
 backend/src/app/storage/fs.clj             | 10 +++---
 backend/src/app/storage/impl.clj           |  5 ++-
 backend/src/app/storage/s3.clj             | 11 ++----
 backend/src/app/svgparse.clj               | 13 +++-----
 backend/src/app/tasks/delete_object.clj    |  4 +--
 backend/src/app/tasks/file_media_gc.clj    | 28 +++++-----------
 backend/src/app/tasks/file_xlog_gc.clj     |  6 ++--
 backend/src/app/tasks/sendmail.clj         |  3 +-
 backend/src/app/tasks/tasks_gc.clj         |  1 -
 backend/src/app/tasks/telemetry.clj        | 24 ++++++-------
 backend/src/app/telemetry.clj              |  2 +-
 backend/src/app/tokens.clj                 |  4 +--
 backend/src/app/util/async.clj             | 39 ++--------------------
 backend/src/app/util/graal.clj             |  1 -
 backend/src/app/util/migrations.clj        | 11 +++---
 backend/src/app/util/transit.clj           |  9 +++--
 backend/src/app/worker.clj                 | 13 +++-----
 48 files changed, 134 insertions(+), 256 deletions(-)

diff --git a/.clj-kondo/config.edn b/.clj-kondo/config.edn
index 5201014d5..94fce53eb 100644
--- a/.clj-kondo/config.edn
+++ b/.clj-kondo/config.edn
@@ -21,9 +21,6 @@
    }
 
   :unresolved-symbol
-  {:exclude ['(app.services.mutations/defmutation)
-             '(app.services.queries/defquery)
-             '(app.util.dispatcher/defservice)
-             '(mount.core/defstate)
+  {:exclude ['(app.util.services/defmethod)
              ]}}}
 
diff --git a/backend/src/app/cli/migrate_media.clj b/backend/src/app/cli/migrate_media.clj
index 6b13f6ff3..4afaf79b2 100644
--- a/backend/src/app/cli/migrate_media.clj
+++ b/backend/src/app/cli/migrate_media.clj
@@ -9,17 +9,14 @@
 
 (ns app.cli.migrate-media
   (:require
-   [app.common.pages :as cp]
-   [app.common.uuid :as uuid]
    [app.common.media :as cm]
    [app.config :as cfg]
    [app.db :as db]
-   [datoteka.core :as fs]
    [app.main :as main]
-   [app.util.blob :as blob]
    [app.storage :as sto]
-   [cuerdas.core :as str]
    [clojure.tools.logging :as log]
+   [cuerdas.core :as str]
+   [datoteka.core :as fs]
    [integrant.core :as ig]))
 
 (declare migrate-profiles)
diff --git a/backend/src/app/db.clj b/backend/src/app/db.clj
index 9fdee5799..f8b5b540b 100644
--- a/backend/src/app/db.clj
+++ b/backend/src/app/db.clj
@@ -12,7 +12,6 @@
    [app.common.exceptions :as ex]
    [app.common.geom.point :as gpt]
    [app.common.spec :as us]
-   [app.config :as cfg]
    [app.db.sql :as sql]
    [app.util.json :as json]
    [app.util.migrations :as mg]
@@ -20,7 +19,6 @@
    [app.util.transit :as t]
    [clojure.java.io :as io]
    [clojure.spec.alpha :as s]
-   [clojure.string :as str]
    [integrant.core :as ig]
    [next.jdbc :as jdbc]
    [next.jdbc.date-time :as jdbc-dt])
@@ -186,17 +184,17 @@
               (sql/insert table params opts)
               (assoc opts :return-keys true))))
 
-(defn- select-values [map ks]
-  (reduce #(conj %1 (map %2)) [] ks))
+;; (defn- select-values [map ks]
+;;   (reduce #(conj %1 (map %2)) [] ks))
 
 (defn insert-multi!
   [ds table param-list]
   (doseq [params param-list]
-      (insert! ds table params))
+    (insert! ds table params))
   ;; FIXME: Won't work
   #_(let [keys (->> param-list first keys (into []))
-        params (->> param-list (mapv #(->> keys (select-values %) (into []))) )]
-    (jdbc-sql/insert-multi! ds table keys params default-options)))
+          params (->> param-list (mapv #(->> keys (select-values %) (into []))) )]
+      (jdbc-sql/insert-multi! ds table keys params default-options)))
 
 (defn update!
   ([ds table params where] (update! ds table params where nil))
diff --git a/backend/src/app/error_reporter.clj b/backend/src/app/error_reporter.clj
index 2d9ec0cbc..ce53f4d67 100644
--- a/backend/src/app/error_reporter.clj
+++ b/backend/src/app/error_reporter.clj
@@ -15,15 +15,14 @@
    [app.common.uuid :as uuid]
    [app.config :as cfg]
    [app.db :as db]
-   [app.tasks :as tasks]
-   [app.worker :as wrk]
-   [app.util.json :as json]
    [app.util.http :as http]
+   [app.util.json :as json]
    [app.util.template :as tmpl]
+   [app.worker :as wrk]
    [clojure.core.async :as a]
+   [clojure.java.io :as io]
    [clojure.spec.alpha :as s]
    [clojure.tools.logging :as log]
-   [clojure.java.io :as io]
    [cuerdas.core :as str]
    [integrant.core :as ig]
    [promesa.exec :as px])
@@ -47,7 +46,7 @@
           :opt-un [::uri]))
 
 (defmethod ig/init-key ::reporter
-  [_ {:keys [executor uri] :as cfg}]
+  [_ {:keys [executor] :as cfg}]
   (log/info "Intializing error reporter.")
   (let [close-ch (a/chan 1)]
     (a/go-loop []
@@ -91,10 +90,10 @@
   [cfg {:keys [message host version id] :as cdata}]
   (try
     (let [uri    (:uri cfg)
-          prefix (str/<< "Unhandled exception (@channel):\n"
-                         "- detail: ~(:public-uri cfg/config)/dbg/error-by-id/~{id}\n"
-                         "- host: `~{host}`\n"
-                         "- version: `~{version}`\n")
+          prefix (str "Unhandled exception (@channel):\n"
+                      "- detail: " (:public-uri cfg/config) "/dbg/error-by-id/" id "\n"
+                      "- host: `" host "`\n"
+                      "- version: `" version "`\n")
           text   (str prefix "```\n" message "\n```")
           rsp    (http/send! {:uri uri
                               :method :post
diff --git a/backend/src/app/http.clj b/backend/src/app/http.clj
index 6bf0605c9..87448fefc 100644
--- a/backend/src/app/http.clj
+++ b/backend/src/app/http.clj
@@ -10,11 +10,8 @@
 (ns app.http
   (:require
    [app.common.data :as d]
-   [app.common.exceptions :as ex]
    [app.common.spec :as us]
-   [app.common.uuid :as uuid]
    [app.config :as cfg]
-   [app.http.assets :as assets]
    [app.http.auth :as auth]
    [app.http.errors :as errors]
    [app.http.middleware :as middleware]
@@ -26,7 +23,6 @@
    [ring.adapter.jetty9 :as jetty])
   (:import
    org.eclipse.jetty.server.Server
-   org.eclipse.jetty.server.Handler
    org.eclipse.jetty.server.handler.ErrorHandler
    org.eclipse.jetty.server.handler.StatisticsHandler))
 
@@ -117,7 +113,7 @@
                :body "internal server error"})))))))
 
 (defn- create-router
-  [{:keys [session rpc google-auth gitlab-auth github-auth metrics ldap-auth storage svgparse assets] :as cfg}]
+  [{:keys [session rpc google-auth gitlab-auth github-auth metrics ldap-auth svgparse assets] :as cfg}]
   (rr/router
    [["/metrics" {:get (:handler metrics)}]
 
diff --git a/backend/src/app/http/assets.clj b/backend/src/app/http/assets.clj
index 2408059cd..d5eb45994 100644
--- a/backend/src/app/http/assets.clj
+++ b/backend/src/app/http/assets.clj
@@ -13,13 +13,12 @@
    [app.common.exceptions :as ex]
    [app.common.spec :as us]
    [app.db :as db]
+   [app.metrics :as mtx]
    [app.storage :as sto]
    [app.util.time :as dt]
-   [app.metrics :as mtx]
-   [cuerdas.core :as str]
    [clojure.spec.alpha :as s]
-   [lambdaisland.uri :as u]
-   [integrant.core :as ig]))
+   [integrant.core :as ig]
+   [lambdaisland.uri :as u]))
 
 (def ^:private cache-max-age
   (dt/duration {:hours 24}))
@@ -73,14 +72,14 @@
          :body ""}))))
 
 (defn- generic-handler
-  [{:keys [storage] :as cfg} request id]
+  [{:keys [storage] :as cfg} _request id]
   (let [obj (sto/get-object storage id)]
     (if obj
       (serve-object cfg obj)
       {:status 404 :body ""})))
 
 (defn objects-handler
-  [{:keys [storage] :as cfg} request]
+  [cfg request]
   (let [id (get-in request [:path-params :id])]
     (generic-handler cfg request (coerce-id id))))
 
diff --git a/backend/src/app/http/auth/github.clj b/backend/src/app/http/auth/github.clj
index 5cfd87350..83d38136c 100644
--- a/backend/src/app/http/auth/github.clj
+++ b/backend/src/app/http/auth/github.clj
@@ -12,7 +12,6 @@
    [app.common.exceptions :as ex]
    [app.common.spec :as us]
    [app.config :as cfg]
-   [app.db :as db]
    [app.http.session :as session]
    [app.util.http :as http]
    [app.util.time :as dt]
@@ -46,7 +45,7 @@
     (str (assoc public :path "/api/oauth/github/callback"))))
 
 (defn- get-access-token
-  [cfg code state]
+  [cfg state code]
   (let [params {:client_id (:client-id cfg)
                 :client_secret (:client-secret cfg)
                 :code code
@@ -93,13 +92,13 @@
         nil))))
 
 (defn auth
-  [{:keys [tokens] :as cfg} request]
+  [{:keys [tokens] :as cfg} _request]
   (let [state  (tokens :generate
                        {:iss :github-oauth
                         :exp (dt/in-future "15m")})
 
         params {:client_id (:client-id cfg/config)
-                :redirect_uri (build-redirect-url)
+                :redirect_uri (build-redirect-url cfg)
                 :state state
                 :scope scope}
         query (u/map->query-string params)
@@ -112,9 +111,9 @@
   [{:keys [tokens rpc session] :as cfg} request]
   (let [state (get-in request [:params :state])
         _     (tokens :verify {:token state :iss :github-oauth})
-        info  (some-> (get-in request [:params :code])
-                      (get-access-token state)
-                      (get-user-info))]
+        info  (some->> (get-in request [:params :code])
+                       (get-access-token cfg state)
+                       (get-user-info))]
 
     (when-not info
       (ex/raise :type :authentication
@@ -158,7 +157,7 @@
                    ::client-secret]))
 
 (defn- default-handler
-  [req]
+  [_]
   (ex/raise :type :not-found))
 
 (defmethod ig/init-key :app.http.auth/github
diff --git a/backend/src/app/http/auth/gitlab.clj b/backend/src/app/http/auth/gitlab.clj
index 57223158a..6aeb64e71 100644
--- a/backend/src/app/http/auth/gitlab.clj
+++ b/backend/src/app/http/auth/gitlab.clj
@@ -9,10 +9,9 @@
 
 (ns app.http.auth.gitlab
   (:require
+   [app.common.data :as d]
    [app.common.exceptions :as ex]
    [app.common.spec :as us]
-   [app.common.data :as d]
-   [app.config :as cfg]
    [app.http.session :as session]
    [app.util.http :as http]
    [app.util.time :as dt]
@@ -75,8 +74,8 @@
 
 
 (defn- get-user-info
-  [token]
-  (let [req {:uri (build-user-info-url)
+  [cfg token]
+  (let [req {:uri (build-user-info-url cfg)
              :headers {"Authorization" (str "Bearer " token)}
              :method :get}
         res (http/send! req)]
@@ -102,12 +101,12 @@
                                   :exp (dt/in-future "15m")})
 
         params {:client_id (:client-id cfg)
-                :redirect_uri (build-redirect-url)
+                :redirect_uri (build-redirect-url cfg)
                 :response_type "code"
                 :state token
                 :scope scope}
         query  (uri/map->query-string params)
-        uri    (-> (build-oauth-uri)
+        uri    (-> (build-oauth-uri cfg)
                    (assoc :query query))]
     {:status 200
      :body {:redirect-uri (str uri)}}))
@@ -118,7 +117,7 @@
         _     (tokens :verify {:token token :iss :gitlab-oauth})
         info  (some->> (get-in request [:params :code])
                        (get-access-token cfg)
-                       (get-user-info))]
+                       (get-user-info cfg))]
 
     (when-not info
       (ex/raise :type :authentication
@@ -167,7 +166,7 @@
            (d/without-nils cfg)))
 
 (defn- default-handler
-  [req]
+  [_]
   (ex/raise :type :not-found))
 
 (defmethod ig/init-key :app.http.auth/gitlab
diff --git a/backend/src/app/http/auth/google.clj b/backend/src/app/http/auth/google.clj
index df80ac737..aaa4c1a2b 100644
--- a/backend/src/app/http/auth/google.clj
+++ b/backend/src/app/http/auth/google.clj
@@ -11,7 +11,6 @@
   (:require
    [app.common.exceptions :as ex]
    [app.common.spec :as us]
-   [app.config :as cfg]
    [app.http.session :as session]
    [app.util.http :as http]
    [app.util.time :as dt]
@@ -142,7 +141,7 @@
                    ::client-secret]))
 
 (defn- default-handler
-  [req]
+  [_]
   (ex/raise :type :not-found))
 
 (defmethod ig/init-key :app.http.auth/google
diff --git a/backend/src/app/http/errors.clj b/backend/src/app/http/errors.clj
index 6ef883d11..17591da14 100644
--- a/backend/src/app/http/errors.clj
+++ b/backend/src/app/http/errors.clj
@@ -10,7 +10,6 @@
 (ns app.http.errors
   "A errors handling for the http server."
   (:require
-   [app.common.exceptions :as ex]
    [app.common.uuid :as uuid]
    [app.config :as cfg]
    [clojure.pprint :refer [pprint]]
diff --git a/backend/src/app/http/middleware.clj b/backend/src/app/http/middleware.clj
index 695ea94f7..d12b64546 100644
--- a/backend/src/app/http/middleware.clj
+++ b/backend/src/app/http/middleware.clj
@@ -9,16 +9,14 @@
 
 (ns app.http.middleware
   (:require
-   [app.common.exceptions :as ex]
    [app.metrics :as mtx]
-   [app.util.transit :as t]
    [app.util.json :as json]
+   [app.util.transit :as t]
    [clojure.java.io :as io]
    [ring.middleware.cookies :refer [wrap-cookies]]
    [ring.middleware.keyword-params :refer [wrap-keyword-params]]
    [ring.middleware.multipart-params :refer [wrap-multipart-params]]
-   [ring.middleware.params :refer [wrap-params]]
-   [ring.middleware.resource :refer [wrap-resource]]))
+   [ring.middleware.params :refer [wrap-params]]))
 
 (defn wrap-server-timing
   [handler]
@@ -46,15 +44,14 @@
                 :json (parse-json body)
                 :transit (parse-transit body))
               (catch Exception e
-                (let [type :json-verbose
-                      data {:type :parse
+                (let [data {:type :parse
                             :hint "unable to parse request body"
                             :message (ex-message e)}]
                   {:status 400
                    :headers {"content-type" "application/transit+json"}
-                   :body (t/encode-str data {:type type})}))))]
+                   :body (t/encode-str data {:type :json-verbose})}))))]
 
-    (fn [{:keys [headers body request-method] :as request}]
+    (fn [{:keys [headers body] :as request}]
       (let [ctype (get headers "content-type")]
         (handler
          (case ctype
diff --git a/backend/src/app/http/session.clj b/backend/src/app/http/session.clj
index 84feb10c0..98f3208ae 100644
--- a/backend/src/app/http/session.clj
+++ b/backend/src/app/http/session.clj
@@ -9,12 +9,12 @@
 
 (ns app.http.session
   (:require
-   [clojure.spec.alpha :as s]
-   [integrant.core :as ig]
    [app.db :as db]
    [app.http.errors :refer [update-thread-context!]]
    [buddy.core.codecs :as bc]
-   [buddy.core.nonce :as bn]))
+   [buddy.core.nonce :as bn]
+   [clojure.spec.alpha :as s]
+   [integrant.core :as ig]))
 
 (defn next-session-id
   ([] (next-session-id 96))
diff --git a/backend/src/app/main.clj b/backend/src/app/main.clj
index 238366f22..1b86832c5 100644
--- a/backend/src/app/main.clj
+++ b/backend/src/app/main.clj
@@ -9,8 +9,8 @@
 
 (ns app.main
   (:require
-   [app.config :as cfg]
    [app.common.data :as d]
+   [app.config :as cfg]
    [app.util.time :as dt]
    [clojure.pprint :as pprint]
    [clojure.tools.logging :as log]
diff --git a/backend/src/app/media.clj b/backend/src/app/media.clj
index a74fd61ca..b775c4852 100644
--- a/backend/src/app/media.clj
+++ b/backend/src/app/media.clj
@@ -14,11 +14,8 @@
    [app.common.exceptions :as ex]
    [app.common.media :as cm]
    [app.common.spec :as us]
-   [app.config :as cfg]
    [app.rlimits :as rlm]
    [app.svgparse :as svg]
-   [app.util.http :as http]
-   [clojure.java.io :as io]
    [clojure.spec.alpha :as s]
    [cuerdas.core :as str]
    [datoteka.core :as fs])
diff --git a/backend/src/app/metrics.clj b/backend/src/app/metrics.clj
index ccc6045a9..9c20d6db6 100644
--- a/backend/src/app/metrics.clj
+++ b/backend/src/app/metrics.clj
@@ -12,9 +12,8 @@
    [app.common.exceptions :as ex]
    [app.util.time :as dt]
    [app.worker]
-   [clojure.tools.logging :as log]
    [clojure.spec.alpha :as s]
-   [cuerdas.core :as str]
+   [clojure.tools.logging :as log]
    [integrant.core :as ig]
    [next.jdbc :as jdbc])
   (:import
@@ -67,7 +66,7 @@
                 {::original origf})))}))
 
 (defn- handler
-  [registry request]
+  [registry _request]
   (let [samples  (.metricFamilySamples ^CollectorRegistry registry)
         writer   (StringWriter.)]
     (TextFormat/write004 writer samples)
@@ -75,7 +74,7 @@
      :body (.toString writer)}))
 
 (defmethod ig/init-key ::metrics
-  [_ opts]
+  [_ _cfg]
   (log/infof "Initializing prometheus registry and instrumentation.")
   (let [registry (create-registry)]
     (instrument-workers! registry)
@@ -180,7 +179,7 @@
             (observe val))))))
 
 (defn create
-  [{:keys [type name] :as props}]
+  [{:keys [type] :as props}]
   (case type
     :counter (make-counter props)
     :gauge   (make-gauge props)
@@ -209,13 +208,13 @@
      (with-meta
        (fn
          ([a]
-          (mobj :inc)
+          (mobj :inc labels)
           (origf a))
          ([a b]
-          (mobj :inc)
+          (mobj :inc labels)
           (origf a b))
          ([a b & more]
-          (mobj :inc)
+          (mobj :inc labels)
           (apply origf a b more)))
        (assoc mdata ::original origf)))))
 
diff --git a/backend/src/app/migrations.clj b/backend/src/app/migrations.clj
index a11c12e05..74e191701 100644
--- a/backend/src/app/migrations.clj
+++ b/backend/src/app/migrations.clj
@@ -9,10 +9,9 @@
 
 (ns app.migrations
   (:require
-   [integrant.core :as ig]
-   [app.db :as db]
+   [app.migrations.migration-0023 :as mg0023]
    [app.util.migrations :as mg]
-   [app.migrations.migration-0023 :as mg0023]))
+   [integrant.core :as ig]))
 
 (def migrations
   [{:name "0001-add-extensions"
diff --git a/backend/src/app/notifications.clj b/backend/src/app/notifications.clj
index 1e63c2fc8..e8543d9d7 100644
--- a/backend/src/app/notifications.clj
+++ b/backend/src/app/notifications.clj
@@ -123,7 +123,7 @@
     (when (jetty/connected? conn)
       (jetty/send! conn data)
       true)
-    (catch java.lang.NullPointerException e
+    (catch java.lang.NullPointerException _e
       false)))
 
 (defn websocket
diff --git a/backend/src/app/redis.clj b/backend/src/app/redis.clj
index 4d050f073..c70268f65 100644
--- a/backend/src/app/redis.clj
+++ b/backend/src/app/redis.clj
@@ -8,7 +8,6 @@
   (:refer-clojure :exclude [run!])
   (:require
    [app.common.spec :as us]
-   [app.config :as cfg]
    [app.util.redis :as redis]
    [clojure.spec.alpha :as s]
    [integrant.core :as ig])
diff --git a/backend/src/app/rlimits.clj b/backend/src/app/rlimits.clj
index 9692fe6ec..703fae507 100644
--- a/backend/src/app/rlimits.clj
+++ b/backend/src/app/rlimits.clj
@@ -10,7 +10,6 @@
 (ns app.rlimits
   "Resource usage limits (in other words: semaphores)."
   (:require
-   [app.common.exceptions :as ex]
    [app.common.spec :as us]
    [clojure.spec.alpha :as s]
    [integrant.core :as ig])
diff --git a/backend/src/app/rpc.clj b/backend/src/app/rpc.clj
index 725c01a77..b99987a0b 100644
--- a/backend/src/app/rpc.clj
+++ b/backend/src/app/rpc.clj
@@ -22,7 +22,7 @@
    [integrant.core :as ig]))
 
 (defn- default-handler
-  [req]
+  [_]
   (ex/raise :type :not-found))
 
 (defn- rpc-query-handler
diff --git a/backend/src/app/rpc/mutations/comments.clj b/backend/src/app/rpc/mutations/comments.clj
index cfd3876f6..6df145155 100644
--- a/backend/src/app/rpc/mutations/comments.clj
+++ b/backend/src/app/rpc/mutations/comments.clj
@@ -15,8 +15,8 @@
    [app.rpc.queries.comments :as comments]
    [app.rpc.queries.files :as files]
    [app.util.blob :as blob]
-   [app.util.time :as dt]
    [app.util.services :as sv]
+   [app.util.time :as dt]
    [clojure.spec.alpha :as s]))
 
 ;; --- Mutation: Create Comment Thread
diff --git a/backend/src/app/rpc/mutations/demo.clj b/backend/src/app/rpc/mutations/demo.clj
index b7a5759f5..0461ef13f 100644
--- a/backend/src/app/rpc/mutations/demo.clj
+++ b/backend/src/app/rpc/mutations/demo.clj
@@ -10,8 +10,8 @@
 (ns app.rpc.mutations.demo
   "A demo specific mutations."
   (:require
-   [app.common.uuid :as uuid]
    [app.common.exceptions :as ex]
+   [app.common.uuid :as uuid]
    [app.config :as cfg]
    [app.db :as db]
    [app.db.profile-initial-data :refer [create-profile-initial-data]]
diff --git a/backend/src/app/rpc/mutations/media.clj b/backend/src/app/rpc/mutations/media.clj
index a5bf2659b..b6b115d7c 100644
--- a/backend/src/app/rpc/mutations/media.clj
+++ b/backend/src/app/rpc/mutations/media.clj
@@ -20,7 +20,6 @@
    [app.util.http :as http]
    [app.util.services :as sv]
    [app.util.time :as dt]
-   [clojure.java.io :as io]
    [clojure.spec.alpha :as s]
    [datoteka.core :as fs]))
 
@@ -84,7 +83,7 @@
 
 
 (defn create-file-media-object
-  [{:keys [conn storage svgc] :as cfg} {:keys [id file-id is-local name content] :as params}]
+  [{:keys [conn storage svgc] :as cfg} {:keys [file-id is-local name content] :as params}]
   (media/validate-media-type (:content-type content))
   (let [storage      (assoc storage :conn conn)
         source-path  (fs/path (:tempfile content))
diff --git a/backend/src/app/rpc/mutations/teams.clj b/backend/src/app/rpc/mutations/teams.clj
index 259eaa4be..4245f1935 100644
--- a/backend/src/app/rpc/mutations/teams.clj
+++ b/backend/src/app/rpc/mutations/teams.clj
@@ -11,7 +11,6 @@
   (:require
    [app.common.data :as d]
    [app.common.exceptions :as ex]
-   [app.common.media :as cm]
    [app.common.spec :as us]
    [app.common.uuid :as uuid]
    [app.db :as db]
@@ -21,13 +20,9 @@
    [app.rpc.queries.profile :as profile]
    [app.rpc.queries.teams :as teams]
    [app.storage :as sto]
-   [app.tasks :as tasks]
    [app.util.services :as sv]
    [app.util.time :as dt]
-   [buddy.core.codecs :as bc]
-   [buddy.core.nonce :as bn]
    [clojure.spec.alpha :as s]
-   [cuerdas.core :as str]
    [datoteka.core :as fs]))
 
 ;; --- Helpers & Specs
@@ -266,10 +261,7 @@
 
 (defn upload-photo
   [{:keys [storage] :as cfg} {:keys [file]}]
-  (let [prefix (-> (bn/random-bytes 8)
-                   (bc/bytes->b64u)
-                   (bc/bytes->str))
-        thumb  (media/run cfg
+  (let [thumb  (media/run cfg
                  {:cmd :profile-thumbnail
                   :format :jpeg
                   :quality 85
diff --git a/backend/src/app/rpc/permissions.clj b/backend/src/app/rpc/permissions.clj
index 7bf9efd04..9b4bae5b0 100644
--- a/backend/src/app/rpc/permissions.clj
+++ b/backend/src/app/rpc/permissions.clj
@@ -10,9 +10,8 @@
 (ns app.rpc.permissions
   "A permission checking helper factories."
   (:require
-   [app.common.spec :as us]
    [app.common.exceptions :as ex]
-   [clojure.spec.alpha :as s]))
+   [app.common.spec :as us]))
 
 (defn make-edition-check-fn
   "A simple factory for edition permission check functions."
diff --git a/backend/src/app/rpc/queries/files.clj b/backend/src/app/rpc/queries/files.clj
index 721520450..025e9d66e 100644
--- a/backend/src/app/rpc/queries/files.clj
+++ b/backend/src/app/rpc/queries/files.clj
@@ -15,8 +15,8 @@
    [app.db :as db]
    [app.rpc.permissions :as perms]
    [app.rpc.queries.projects :as projects]
-   [app.util.services :as sv]
    [app.util.blob :as blob]
+   [app.util.services :as sv]
    [clojure.spec.alpha :as s]))
 
 (declare decode-row)
diff --git a/backend/src/app/rpc/queries/projects.clj b/backend/src/app/rpc/queries/projects.clj
index c6f56dcc7..54eda7896 100644
--- a/backend/src/app/rpc/queries/projects.clj
+++ b/backend/src/app/rpc/queries/projects.clj
@@ -9,7 +9,6 @@
 
 (ns app.rpc.queries.projects
   (:require
-   [app.common.exceptions :as ex]
    [app.common.spec :as us]
    [app.db :as db]
    [app.rpc.permissions :as perms]
diff --git a/backend/src/app/sprops.clj b/backend/src/app/sprops.clj
index 252e42ef8..a46b7258e 100644
--- a/backend/src/app/sprops.clj
+++ b/backend/src/app/sprops.clj
@@ -10,16 +10,11 @@
 (ns app.sprops
   "Server props module."
   (:require
-   [app.common.exceptions :as ex]
-   [app.common.spec :as us]
    [app.common.uuid :as uuid]
-   [app.config :as cfg]
    [app.db :as db]
-   [app.util.time :as dt]
    [buddy.core.codecs :as bc]
    [buddy.core.nonce :as bn]
    [clojure.spec.alpha :as s]
-   [clojure.tools.logging :as log]
    [integrant.core :as ig]))
 
 (declare initialize)
diff --git a/backend/src/app/srepl.clj b/backend/src/app/srepl.clj
index 259e0b8f0..5fa1314d3 100644
--- a/backend/src/app/srepl.clj
+++ b/backend/src/app/srepl.clj
@@ -10,12 +10,12 @@
 (ns app.srepl
   "Server Repl."
   (:require
-   [integrant.core :as ig]
-   [app.srepl.main]
    [app.common.spec :as us]
+   [app.srepl.main]
    [clojure.core.server :as ccs]
+   [clojure.main :as cm]
    [clojure.spec.alpha :as s]
-   [clojure.main :as cm]))
+   [integrant.core :as ig]))
 
 (defn- repl-init
   []
diff --git a/backend/src/app/storage.clj b/backend/src/app/storage.clj
index c18356830..7e5371d50 100644
--- a/backend/src/app/storage.clj
+++ b/backend/src/app/storage.clj
@@ -14,7 +14,6 @@
    [app.common.exceptions :as ex]
    [app.common.spec :as us]
    [app.common.uuid :as uuid]
-   [app.config :as cfg]
    [app.db :as db]
    [app.storage.db :as sdb]
    [app.storage.fs :as sfs]
@@ -27,7 +26,6 @@
    [cuerdas.core :as str]
    [datoteka.core :as fs]
    [integrant.core :as ig]
-   [lambdaisland.uri :as u]
    [promesa.exec :as px])
   (:import
    java.io.InputStream))
@@ -198,7 +196,7 @@
 (defn clone-object
   "Creates a clone of the provided object using backend basded efficient
   method. Always clones objects to the configured default."
-  [{:keys [pool conn executor] :as storage} object]
+  [{:keys [pool conn] :as storage} object]
   (us/assert ::storage storage)
   (let [storage (assoc storage :conn (or conn pool))
         object* (create-database-object storage object)]
@@ -242,7 +240,7 @@
 (defn get-object-path
   "Get the Path to the object. Only works with `:fs` type of
   storages."
-  [{:keys [backend conn path] :as storage} object]
+  [storage object]
   (let [backend (resolve-backend storage (:backend object))]
     (when (not= :fs (:type backend))
       (ex/raise :type :internal
@@ -304,7 +302,7 @@
                   backend (assoc backend :conn conn)]
               (impl/del-objects-in-bulk backend ids)))]
 
-    (fn [task]
+    (fn [_]
       (db/with-atomic [conn pool]
         (loop [n 0]
           (if-let [[groups total] (retrieve-deleted-objects conn)]
@@ -373,7 +371,7 @@
             (db/exec-one! conn ["update storage_object set touched_at=null where id = ANY(?)"
                                 (db/create-array conn "uuid" (into-array java.util.UUID ids))]))]
 
-    (fn [task]
+    (fn [_]
       (db/with-atomic [conn pool]
         (loop [cntf 0
                cntd 0]
@@ -424,7 +422,7 @@
   [_ {:keys [pool storage] :as cfg}]
   (letfn [(group-results [rows]
             (let [conj (fnil conj [])]
-              (reduce (fn [acc {:keys [id backend exist] :as row}]
+              (reduce (fn [acc {:keys [id exist] :as row}]
                         (cond-> (update acc :all conj id)
                           (false? exist)
                           (update :to-delete conj (dissoc row :exist))))
@@ -451,7 +449,7 @@
             (let [ids (db/create-array conn "uuid" (into-array java.util.UUID ids))]
               (db/exec-one! conn ["delete from storage_pending where id = ANY(?)" ids])))]
 
-    (fn [task]
+    (fn [_]
       (db/with-atomic [conn pool]
         (loop [n 0 d 0]
           (if-let [{:keys [all to-delete]} (retrieve-pending conn)]
diff --git a/backend/src/app/storage/db.clj b/backend/src/app/storage/db.clj
index e083128f3..9dee0b59c 100644
--- a/backend/src/app/storage/db.clj
+++ b/backend/src/app/storage/db.clj
@@ -9,21 +9,13 @@
 
 (ns app.storage.db
   (:require
-   [app.common.exceptions :as ex]
    [app.common.spec :as us]
    [app.db :as db]
    [app.storage.impl :as impl]
-   [clojure.java.io :as io]
    [clojure.spec.alpha :as s]
-   [datoteka.core :as fs]
-   [lambdaisland.uri :as u]
    [integrant.core :as ig])
   (:import
-   org.postgresql.largeobject.LargeObject
-   java.io.ByteArrayInputStream
-   java.io.ByteArrayOutputStream
-   java.io.InputStream
-   java.io.OutputStream))
+   java.io.ByteArrayInputStream))
 
 ;; --- BACKEND INIT
 
@@ -58,11 +50,11 @@
     (ByteArrayInputStream. (:data result))))
 
 (defmethod impl/get-object-url :db
-  [backend {:keys [id] :as object}]
+  [_ _]
   (throw (UnsupportedOperationException. "not supported")))
 
 (defmethod impl/del-objects-in-bulk :db
-  [backend ids]
-  ;; NOOP: because delting the row already deletes the file data from
+  [_ _]
+  ;; NOOP: because deleting the row already deletes the file data from
   ;; the database.
   nil)
diff --git a/backend/src/app/storage/fs.clj b/backend/src/app/storage/fs.clj
index 998b0e8e8..9a0e52b4c 100644
--- a/backend/src/app/storage/fs.clj
+++ b/backend/src/app/storage/fs.clj
@@ -9,17 +9,15 @@
 
 (ns app.storage.fs
   (:require
-   [app.common.data :as d]
    [app.common.exceptions :as ex]
    [app.common.spec :as us]
-   [app.db :as db]
    [app.storage.impl :as impl]
    [clojure.java.io :as io]
    [clojure.spec.alpha :as s]
-   [datoteka.core :as fs]
    [cuerdas.core :as str]
-   [lambdaisland.uri :as u]
-   [integrant.core :as ig])
+   [datoteka.core :as fs]
+   [integrant.core :as ig]
+   [lambdaisland.uri :as u])
   (:import
    java.io.InputStream
    java.io.OutputStream
@@ -34,7 +32,7 @@
   (s/keys :opt-un [::directory]))
 
 (defmethod ig/init-key ::backend
-  [key cfg]
+  [_ cfg]
   ;; Return a valid backend data structure only if all optional
   ;; parameters are provided.
   (when (string? (:directory cfg))
diff --git a/backend/src/app/storage/impl.clj b/backend/src/app/storage/impl.clj
index b7ace9b93..450ae718c 100644
--- a/backend/src/app/storage/impl.clj
+++ b/backend/src/app/storage/impl.clj
@@ -13,14 +13,13 @@
    [app.common.exceptions :as ex]
    [app.common.spec :as us]
    [app.common.uuid :as uuid]
-   [clojure.java.io :as io]
-   [buddy.core.codecs :as bc])
+   [buddy.core.codecs :as bc]
+   [clojure.java.io :as io])
   (:import
    java.nio.ByteBuffer
    java.util.UUID
    java.io.ByteArrayInputStream
    java.io.InputStream
-   java.nio.file.Path
    java.nio.file.Files))
 
 ;; --- API Definition
diff --git a/backend/src/app/storage/s3.clj b/backend/src/app/storage/s3.clj
index f8027a079..7f0499138 100644
--- a/backend/src/app/storage/s3.clj
+++ b/backend/src/app/storage/s3.clj
@@ -13,23 +13,18 @@
    [app.common.data :as d]
    [app.common.exceptions :as ex]
    [app.common.spec :as us]
-   [app.db :as db]
    [app.storage.impl :as impl]
    [app.util.time :as dt]
    [clojure.java.io :as io]
    [clojure.spec.alpha :as s]
-   [lambdaisland.uri :as u]
-   [integrant.core :as ig])
+   [integrant.core :as ig]
+   [lambdaisland.uri :as u])
   (:import
-   java.io.InputStream
-   java.io.OutputStream
-   java.nio.file.Path
    java.time.Duration
    java.util.Collection
    software.amazon.awssdk.core.sync.RequestBody
    software.amazon.awssdk.regions.Region
    software.amazon.awssdk.services.s3.S3Client
-   software.amazon.awssdk.services.s3.S3ClientBuilder
    software.amazon.awssdk.services.s3.model.Delete
    software.amazon.awssdk.services.s3.model.CopyObjectRequest
    software.amazon.awssdk.services.s3.model.DeleteObjectsRequest
@@ -113,7 +108,7 @@
     :eu-central-1 Region/EU_CENTRAL_1))
 
 (defn- build-s3-client
-  [{:keys [region bucket]}]
+  [{:keys [region]}]
   (.. (S3Client/builder)
       (region (lookup-region region))
       (build)))
diff --git a/backend/src/app/svgparse.clj b/backend/src/app/svgparse.clj
index 1a2f9d8be..10bdfa7be 100644
--- a/backend/src/app/svgparse.clj
+++ b/backend/src/app/svgparse.clj
@@ -10,18 +10,14 @@
 (ns app.svgparse
   (:require
    [app.common.exceptions :as ex]
-   [app.common.spec :as us]
-   [cuerdas.core :as str]
    [app.metrics :as mtx]
-   [clojure.java.io :as io]
-   [clojure.java.shell :as shell]
-   [clojure.spec.alpha :as s]
-   [clojure.xml :as xml]
    [app.util.graal :as graal]
    [app.util.pool :as pool]
+   [clojure.java.io :as io]
+   [clojure.spec.alpha :as s]
+   [clojure.xml :as xml]
    [integrant.core :as ig])
   (:import
-   java.io.InputStream
    java.util.function.Consumer
    org.apache.commons.io.IOUtils))
 
@@ -36,7 +32,7 @@
   (s/keys :req-un [::mtx/metrics]))
 
 (defmethod ig/init-key ::svgc
-  [_ {:keys [metrics] :as cfg}]
+  [_ _]
   (let [ctx-pool (prepare-context-pool)]
     (with-meta
       (fn [data]
@@ -69,7 +65,6 @@
 (defn- do-svg-clean
   [ctx data]
   (let [res      (promise)
-        bindings (graal/get-bindings ctx "js")
         optimize (-> (graal/get-bindings ctx "js")
                      (graal/get-member "svgc")
                      (graal/get-member "optimize"))
diff --git a/backend/src/app/tasks/delete_object.clj b/backend/src/app/tasks/delete_object.clj
index 1dea1cc81..4d31ff4f9 100644
--- a/backend/src/app/tasks/delete_object.clj
+++ b/backend/src/app/tasks/delete_object.clj
@@ -11,11 +11,11 @@
   "Generic task for permanent deletion of objects."
   (:require
    [app.common.spec :as us]
-   [integrant.core :as ig]
    [app.db :as db]
    [app.metrics :as mtx]
    [clojure.spec.alpha :as s]
-   [clojure.tools.logging :as log]))
+   [clojure.tools.logging :as log]
+   [integrant.core :as ig]))
 
 (declare handler)
 (declare handle-deletion)
diff --git a/backend/src/app/tasks/file_media_gc.clj b/backend/src/app/tasks/file_media_gc.clj
index fb9c9e942..2e77a6e54 100644
--- a/backend/src/app/tasks/file_media_gc.clj
+++ b/backend/src/app/tasks/file_media_gc.clj
@@ -13,11 +13,8 @@
   after some period of inactivity (the default threshold is 72h)."
   (:require
    [app.common.pages.migrations :as pmg]
-   [app.common.spec :as us]
    [app.db :as db]
    [app.metrics :as mtx]
-   [app.storage :as sto]
-   [app.tasks :as tasks]
    [app.util.blob :as blob]
    [app.util.time :as dt]
    [clojure.spec.alpha :as s]
@@ -25,8 +22,8 @@
    [integrant.core :as ig]))
 
 (declare handler)
-(declare retrieve-candidates)
 (declare process-file)
+(declare retrieve-candidates)
 
 (s/def ::storage some?)
 
@@ -52,11 +49,6 @@
             (run! (partial process-file cfg) files)
             (recur)))))))
 
-(defn- decode-row
-  [{:keys [data] :as row}]
-  (cond-> row
-    (bytes? data) (assoc :data (blob/decode data))))
-
 (def ^:private
   sql:retrieve-candidates-chunk
   "select f.id,
@@ -94,14 +86,14 @@
       (into (keys (:media data)))))
 
 (defn- process-file
-  [{:keys [conn storage] :as cfg} {:keys [id data age] :as file}]
-  (let [data    (-> (blob/decode data)
-                    (assoc :id id)
-                    (pmg/migrate-data))
+  [{:keys [conn] :as cfg} {:keys [id data age] :as file}]
+  (let [data   (-> (blob/decode data)
+                   (assoc :id id)
+                   (pmg/migrate-data))
 
-        used    (collect-used-media data)
-        unused  (->> (db/query conn :file-media-object {:file-id id})
-                     (remove #(contains? used (:id %))))]
+        used   (collect-used-media data)
+        unused (->> (db/query conn :file-media-object {:file-id id})
+                    (remove #(contains? used (:id %))))]
 
     (log/infof "processing file: id='%s' age='%s' to-delete=%s" id age (count unused))
 
@@ -114,9 +106,7 @@
       (log/debugf "deleting media object: id='%s' media-id='%s' thumb-id='%s'"
                   (:id mobj) (:media-id mobj) (:thumbnail-id mobj))
       ;; NOTE: deleting the file-media-object in the database
-      ;; automatically marks to be deleted the associated storage
-      ;; objects with the specialized trigger attached
-      ;; to :file-media-object table.
+      ;; automatically marks as toched the referenced storage objects.
       (db/delete! conn :file-media-object {:id (:id mobj)}))
 
     nil))
diff --git a/backend/src/app/tasks/file_xlog_gc.clj b/backend/src/app/tasks/file_xlog_gc.clj
index d18b9d6e3..4b90200c3 100644
--- a/backend/src/app/tasks/file_xlog_gc.clj
+++ b/backend/src/app/tasks/file_xlog_gc.clj
@@ -11,17 +11,17 @@
   "A maintenance task that performs a garbage collection of the file
   change (transaction) log."
   (:require
-   [app.common.spec :as us]
-   [integrant.core :as ig]
    [app.db :as db]
    [app.metrics :as mtx]
    [app.util.time :as dt]
    [clojure.spec.alpha :as s]
-   [clojure.tools.logging :as log]))
+   [clojure.tools.logging :as log]
+   [integrant.core :as ig]))
 
 (declare handler)
 
 (s/def ::max-age ::dt/duration)
+
 (defmethod ig/pre-init-spec ::handler [_]
   (s/keys :req-un [::db/pool ::mtx/metrics ::max-age]))
 
diff --git a/backend/src/app/tasks/sendmail.clj b/backend/src/app/tasks/sendmail.clj
index dc3a95cc0..78315a2b7 100644
--- a/backend/src/app/tasks/sendmail.clj
+++ b/backend/src/app/tasks/sendmail.clj
@@ -9,12 +9,11 @@
 
 (ns app.tasks.sendmail
   (:require
-   [app.common.spec :as us]
    [app.config :as cfg]
    [app.metrics :as mtx]
    [app.util.emails :as emails]
-   [clojure.tools.logging :as log]
    [clojure.spec.alpha :as s]
+   [clojure.tools.logging :as log]
    [integrant.core :as ig]))
 
 (declare handler)
diff --git a/backend/src/app/tasks/tasks_gc.clj b/backend/src/app/tasks/tasks_gc.clj
index 5abd93e34..975bfea8c 100644
--- a/backend/src/app/tasks/tasks_gc.clj
+++ b/backend/src/app/tasks/tasks_gc.clj
@@ -11,7 +11,6 @@
   "A maintenance task that performs a cleanup of already executed tasks
   from the database table."
   (:require
-   [app.common.spec :as us]
    [app.db :as db]
    [app.metrics :as mtx]
    [app.util.time :as dt]
diff --git a/backend/src/app/tasks/telemetry.clj b/backend/src/app/tasks/telemetry.clj
index e29cdacdb..bd5f5a3b4 100644
--- a/backend/src/app/tasks/telemetry.clj
+++ b/backend/src/app/tasks/telemetry.clj
@@ -12,15 +12,13 @@
   information about the current instance and send it to the telemetry
   server."
   (:require
-   [app.config :as cfg]
    [app.common.exceptions :as ex]
    [app.common.spec :as us]
-   [app.common.uuid :as uuid]
+   [app.config :as cfg]
    [app.db :as db]
    [app.util.http :as http]
    [app.util.json :as json]
    [clojure.spec.alpha :as s]
-   [clojure.tools.logging :as log]
    [integrant.core :as ig]))
 
 (declare handler)
@@ -60,16 +58,16 @@
   [{:keys [sprops] :as cfg}]
   (let [instance-id (:instance-id sprops)
         data        (retrieve-stats cfg)
-        data        (assoc data :instance-id instance-id)]
-    (let [response (http/send! {:method :post
-                                :uri (:uri cfg)
-                                :headers {"content-type" "application/json"}
-                                :body (json/encode-str data)})]
-      (when (not= 200 (:status response))
-        (ex/raise :type :internal
-                  :code :invalid-response-from-google
-                  :context {:status (:status response)
-                            :body (:body response)})))))
+        data        (assoc data :instance-id instance-id)
+        response    (http/send! {:method :post
+                                 :uri (:uri cfg)
+                                 :headers {"content-type" "application/json"}
+                                 :body (json/encode-str data)})]
+    (when (not= 200 (:status response))
+      (ex/raise :type :internal
+                :code :invalid-response-from-google
+                :context {:status (:status response)
+                          :body (:body response)}))))
 
 (defn retrieve-num-teams
   [conn]
diff --git a/backend/src/app/telemetry.clj b/backend/src/app/telemetry.clj
index 4bce0f038..b97c79360 100644
--- a/backend/src/app/telemetry.clj
+++ b/backend/src/app/telemetry.clj
@@ -11,7 +11,7 @@
   (:require
    [app.common.spec :as us]
    [app.db :as db]
-   [app.http.middleware :refer [wrap-parse-request-body wrap-errors]]
+   [app.http.middleware :refer [wrap-parse-request-body]]
    [clojure.spec.alpha :as s]
    [clojure.tools.logging :as log]
    [integrant.core :as ig]
diff --git a/backend/src/app/tokens.clj b/backend/src/app/tokens.clj
index e83a4a36c..a71c49dae 100644
--- a/backend/src/app/tokens.clj
+++ b/backend/src/app/tokens.clj
@@ -12,14 +12,12 @@
   (:require
    [app.common.exceptions :as ex]
    [app.common.spec :as us]
-   [integrant.core :as ig]
-   [app.config :as cfg]
    [app.util.time :as dt]
    [app.util.transit :as t]
    [buddy.core.kdf :as bk]
    [buddy.sign.jwe :as jwe]
    [clojure.spec.alpha :as s]
-   [clojure.tools.logging :as log]))
+   [integrant.core :as ig]))
 
 (defn- derive-tokens-secret
   [key]
diff --git a/backend/src/app/util/async.clj b/backend/src/app/util/async.clj
index 8c2ac6c72..aa0952e26 100644
--- a/backend/src/app/util/async.clj
+++ b/backend/src/app/util/async.clj
@@ -6,49 +6,16 @@
 
 (ns app.util.async
   (:require
-   [clojure.spec.alpha :as s]
    [clojure.core.async :as a]
-   [cuerdas.core :as str])
+   [clojure.spec.alpha :as s])
   (:import
-   java.util.concurrent.Executor
-   java.util.concurrent.ThreadFactory
-   java.util.concurrent.ForkJoinPool
-   java.util.concurrent.ForkJoinPool$ForkJoinWorkerThreadFactory
-   java.util.concurrent.ExecutorService
-   java.util.concurrent.atomic.AtomicLong))
+   java.util.concurrent.Executor))
 
 (s/def ::executor #(instance? Executor %))
 
 (defonce processors
   (delay (.availableProcessors (Runtime/getRuntime))))
 
-;; (defn forkjoin-thread-factory
-;;   [f]
-;;   (reify ForkJoinPool$ForkJoinWorkerThreadFactory
-;;     (newThread [this pool]
-;;       (let [wth (.newThread ForkJoinPool/defaultForkJoinWorkerThreadFactory pool)]
-;;         (f wth)))))
-
-;; (defn forkjoin-named-thread-factory
-;;   [name]
-;;   (reify ForkJoinPool$ForkJoinWorkerThreadFactory
-;;     (newThread [this pool]
-;;       (let [wth (.newThread ForkJoinPool/defaultForkJoinWorkerThreadFactory pool)]
-;;         (.setName wth (str name ":" (.getPoolIndex wth)))
-;;         wth))))
-
-;; (defn forkjoin-pool
-;;   [{:keys [factory async? parallelism]
-;;     :or {async? true}
-;;     :as opts}]
-;;   (let [parallelism (or parallelism @processors)
-;;         factory (cond
-;;                   (fn? factory) (forkjoin-thread-factory factory)
-;;                   (instance? ForkJoinPool$ForkJoinWorkerThreadFactory factory) factory
-;;                   (nil? factory) ForkJoinPool/defaultForkJoinWorkerThreadFactory
-;;                   :else (throw (ex-info "Unexpected thread factory" {:factory factory})))]
-;;     (ForkJoinPool. (or parallelism @processors) factory nil async?)))
-
 (defmacro go-try
   [& body]
   `(a/go
@@ -84,7 +51,7 @@
                     (finally
                       (a/close! c)))))
       c
-      (catch java.util.concurrent.RejectedExecutionException e
+      (catch java.util.concurrent.RejectedExecutionException _e
         (a/close! c)
         c))))
 
diff --git a/backend/src/app/util/graal.clj b/backend/src/app/util/graal.clj
index 00d5f5697..daa0a51a1 100644
--- a/backend/src/app/util/graal.clj
+++ b/backend/src/app/util/graal.clj
@@ -10,7 +10,6 @@
 (ns app.util.graal
   "Graal Polyglot integration layer."
   (:import
-   java.util.function.Consumer
    org.graalvm.polyglot.Context
    org.graalvm.polyglot.Source
    org.graalvm.polyglot.Value))
diff --git a/backend/src/app/util/migrations.clj b/backend/src/app/util/migrations.clj
index 9829082bc..9255657ab 100644
--- a/backend/src/app/util/migrations.clj
+++ b/backend/src/app/util/migrations.clj
@@ -39,13 +39,10 @@
 
 (defn- impl-migrate-single
   [pool modname {:keys [name] :as migration}]
-  (letfn [(execute []
-            (register! pool modname name)
-            ((:fn migration) pool))]
-    (when-not (registered? pool modname (:name migration))
-      (log/info (str/format "applying migration %s/%s" modname name))
-      (register! pool modname name)
-      ((:fn migration) pool))))
+  (when-not (registered? pool modname (:name migration))
+    (log/info (str/format "applying migration %s/%s" modname name))
+    (register! pool modname name)
+    ((:fn migration) pool)))
 
 (defn- impl-migrate
   [conn migrations _opts]
diff --git a/backend/src/app/util/transit.clj b/backend/src/app/util/transit.clj
index 4a0b535d5..6c4b20bc2 100644
--- a/backend/src/app/util/transit.clj
+++ b/backend/src/app/util/transit.clj
@@ -128,9 +128,12 @@
        (decode)))
 
 (defn encode-str
-  [message]
-  (->> (encode message)
-       (bytes->str)))
+  ([message]
+   (->> (encode message)
+        (bytes->str)))
+  ([message opts]
+   (->> (encode message opts)
+        (bytes->str))))
 
 (defn encode-verbose-str
   [message]
diff --git a/backend/src/app/worker.clj b/backend/src/app/worker.clj
index a452e9e00..9e87a1ae9 100644
--- a/backend/src/app/worker.clj
+++ b/backend/src/app/worker.clj
@@ -12,7 +12,6 @@
   (:require
    [app.common.spec :as us]
    [app.common.uuid :as uuid]
-   [app.config :as cfg]
    [app.db :as db]
    [app.util.async :as aa]
    [app.util.time :as dt]
@@ -20,17 +19,13 @@
    [clojure.pprint :refer [pprint]]
    [clojure.spec.alpha :as s]
    [clojure.tools.logging :as log]
-   [cuerdas.core :as str]
    [integrant.core :as ig]
    [promesa.exec :as px])
   (:import
    org.eclipse.jetty.util.thread.QueuedThreadPool
    java.util.concurrent.ExecutorService
    java.util.concurrent.Executors
-   java.util.concurrent.Executor
-   java.time.Duration
-   java.time.Instant
-   java.util.Date))
+   java.util.concurrent.Executor))
 
 (s/def ::executor #(instance? Executor %))
 
@@ -236,7 +231,7 @@
           {:status :retry :task item :error error})))))
 
 (defn- run-task
-  [{:keys [tasks conn]} item]
+  [{:keys [tasks]} item]
   (try
     (log/debugf "Started task '%s/%s/%s'." (:name item) (:id item) (:retry-num item))
     (handle-task tasks item)
@@ -255,7 +250,7 @@
       for update skip locked")
 
 (defn- event-loop-fn*
-  [{:keys [tasks pool executor batch-size] :as cfg}]
+  [{:keys [pool executor batch-size] :as cfg}]
   (db/with-atomic [conn pool]
     (let [queue (:queue cfg)
           items (->> (db/exec! conn [sql:select-next-tasks queue batch-size])
@@ -304,7 +299,7 @@
   (s/keys :req-un [::executor ::db/pool ::schedule]))
 
 (defmethod ig/init-key ::scheduler
-  [_ {:keys [executor schedule] :as cfg}]
+  [_ {:keys [schedule] :as cfg}]
   (let [scheduler (Executors/newScheduledThreadPool (int 1))
         schedule  (filter some? schedule)
         cfg       (assoc cfg