From 074fa790ba6282772cd8b2d40926032228d17c81 Mon Sep 17 00:00:00 2001
From: Maksim Pechnikov <parallel588@gmail.com>
Date: Sun, 9 Dec 2018 12:12:48 +0300
Subject: [PATCH] fix compile warnings

---
 lib/mix/tasks/pleroma/common.ex               |  2 +-
 lib/mix/tasks/pleroma/instance.ex             |  1 -
 lib/mix/tasks/pleroma/relay.ex                |  4 +-
 lib/mix/tasks/pleroma/uploads.ex              |  8 +-
 lib/mix/tasks/pleroma/user.ex                 | 44 +++++-----
 lib/pleroma/application.ex                    |  1 -
 lib/pleroma/emoji.ex                          |  2 +-
 lib/pleroma/filter.ex                         | 12 +--
 lib/pleroma/html.ex                           |  6 +-
 lib/pleroma/http/connection.ex                |  2 +-
 lib/pleroma/list.ex                           |  4 +-
 lib/pleroma/mime.ex                           |  4 +-
 lib/pleroma/notification.ex                   |  8 +-
 lib/pleroma/plugs/authentication_plug.ex      |  9 +-
 lib/pleroma/plugs/basic_auth_decoder_plug.ex  |  2 +-
 lib/pleroma/plugs/federating_plug.ex          |  2 +-
 lib/pleroma/plugs/http_security_plug.ex       | 10 +--
 .../plugs/session_authentication_plug.ex      |  1 -
 lib/pleroma/plugs/uploaded_media.ex           |  4 -
 lib/pleroma/plugs/user_fetcher_plug.ex        |  2 +-
 lib/pleroma/reverse_proxy.ex                  | 39 ++++-----
 lib/pleroma/upload.ex                         | 25 +++---
 lib/pleroma/upload/filter/dedupe.ex           |  2 +-
 lib/pleroma/upload/filter/mogrify.ex          |  2 +-
 lib/pleroma/uploaders/local.ex                |  2 -
 lib/pleroma/uploaders/mdii.ex                 |  4 +-
 lib/pleroma/uploaders/swift/swift.ex          |  1 -
 lib/pleroma/user.ex                           | 17 ++--
 lib/pleroma/user_invite_token.ex              |  3 +-
 lib/pleroma/web/activity_pub/activity_pub.ex  |  2 +-
 .../activity_pub/activity_pub_controller.ex   |  2 +-
 .../activity_pub/mrf/ensure_re_prepended.ex   |  4 +-
 .../web/activity_pub/transmogrifier.ex        | 82 +++++++++----------
 lib/pleroma/web/activity_pub/utils.ex         |  2 +-
 .../web/admin_api/admin_api_controller.ex     | 52 ++++++------
 lib/pleroma/web/common_api/utils.ex           |  4 +-
 lib/pleroma/web/federator/federator.ex        |  3 +-
 lib/pleroma/web/federator/retry_queue.ex      | 11 +--
 .../mastodon_api/mastodon_api_controller.ex   | 15 ++--
 .../web/mastodon_api/mastodon_socket.ex       |  8 +-
 .../web/mastodon_api/views/mastodon_view.ex   |  1 -
 .../views/push_subscription_view.ex           |  1 -
 lib/pleroma/web/media_proxy/controller.ex     |  2 +-
 lib/pleroma/web/oauth/oauth_controller.ex     |  2 +-
 lib/pleroma/web/ostatus/ostatus.ex            |  2 +-
 lib/pleroma/web/ostatus/ostatus_controller.ex |  4 +-
 lib/pleroma/web/router.ex                     |  2 -
 lib/pleroma/web/streamer.ex                   |  2 -
 .../controllers/util_controller.ex            |  3 +-
 .../representers/activity_representer.ex      |  6 +-
 lib/pleroma/web/twitter_api/twitter_api.ex    | 13 +--
 .../web/twitter_api/twitter_api_controller.ex |  8 +-
 lib/pleroma/web/xml/xml.ex                    |  8 +-
 53 files changed, 203 insertions(+), 259 deletions(-)

diff --git a/lib/mix/tasks/pleroma/common.ex b/lib/mix/tasks/pleroma/common.ex
index 06893af05..36432c291 100644
--- a/lib/mix/tasks/pleroma/common.ex
+++ b/lib/mix/tasks/pleroma/common.ex
@@ -1,5 +1,5 @@
 defmodule Mix.Tasks.Pleroma.Common do
-  @shortdoc "Common functions to be reused in mix tasks"
+  @doc "Common functions to be reused in mix tasks"
   def start_pleroma do
     Mix.Task.run("app.start")
   end
diff --git a/lib/mix/tasks/pleroma/instance.ex b/lib/mix/tasks/pleroma/instance.ex
index c66322707..3be856115 100644
--- a/lib/mix/tasks/pleroma/instance.ex
+++ b/lib/mix/tasks/pleroma/instance.ex
@@ -1,6 +1,5 @@
 defmodule Mix.Tasks.Pleroma.Instance do
   use Mix.Task
-  alias Pleroma.{Repo, User}
   alias Mix.Tasks.Pleroma.Common
 
   @shortdoc "Manages Pleroma instance"
diff --git a/lib/mix/tasks/pleroma/relay.ex b/lib/mix/tasks/pleroma/relay.ex
index f4b7ff6a0..03586d6c3 100644
--- a/lib/mix/tasks/pleroma/relay.ex
+++ b/lib/mix/tasks/pleroma/relay.ex
@@ -22,7 +22,7 @@ defmodule Mix.Tasks.Pleroma.Relay do
   def run(["follow", target]) do
     Common.start_pleroma()
 
-    with {:ok, activity} <- Relay.follow(target) do
+    with {:ok, _activity} <- Relay.follow(target) do
       # put this task to sleep to allow the genserver to push out the messages
       :timer.sleep(500)
     else
@@ -33,7 +33,7 @@ def run(["follow", target]) do
   def run(["unfollow", target]) do
     Common.start_pleroma()
 
-    with {:ok, activity} <- Relay.unfollow(target) do
+    with {:ok, _activity} <- Relay.unfollow(target) do
       # put this task to sleep to allow the genserver to push out the messages
       :timer.sleep(500)
     else
diff --git a/lib/mix/tasks/pleroma/uploads.ex b/lib/mix/tasks/pleroma/uploads.ex
index 0742ab378..45bfd254c 100644
--- a/lib/mix/tasks/pleroma/uploads.ex
+++ b/lib/mix/tasks/pleroma/uploads.ex
@@ -1,18 +1,16 @@
 defmodule Mix.Tasks.Pleroma.Uploads do
   use Mix.Task
-  import Mix.Ecto
-  alias Pleroma.{Upload, Uploaders.Local, Uploaders.S3}
+  alias Pleroma.{Upload, Uploaders.Local}
   alias Mix.Tasks.Pleroma.Common
   require Logger
 
   @log_every 50
   @shortdoc "Migrate uploads from local to remote storage"
-  @longdoc """
+  @doc """
    Manages uploads
    ## Migrate uploads from local to remote storage
 
   """
-
   def run(["migrate_local", target_uploader | args]) do
     delete? = Enum.member?(args, "--delete")
     Common.start_pleroma()
@@ -59,7 +57,7 @@ def run(["migrate_local", target_uploader | args]) do
 
           File.exists?(root_path) ->
             file = Path.basename(id)
-            [hash, ext] = String.split(id, ".")
+            [hash, _ext] = String.split(id, ".")
             {%Pleroma.Upload{id: hash, name: file, path: file, tempfile: root_path}, root_path}
 
           true ->
diff --git a/lib/mix/tasks/pleroma/user.ex b/lib/mix/tasks/pleroma/user.ex
index 590553443..2675b021d 100644
--- a/lib/mix/tasks/pleroma/user.ex
+++ b/lib/mix/tasks/pleroma/user.ex
@@ -20,7 +20,7 @@ defmodule Mix.Tasks.Pleroma.User do
   - `--admin`/`--no-admin` - whether the user is an admin
 
   ## Generate an invite link.
-    
+
       mix pleroma.user invite
 
   ## Delete the user's account.
@@ -32,7 +32,7 @@ defmodule Mix.Tasks.Pleroma.User do
       mix pleroma.user toggle_activated NICKNAME
 
   ## Unsubscribe local users from user's account and deactivate it
-     
+
       mix pleroma.user unsubscribe NICKNAME
 
   ## Create a password reset link.
@@ -235,6 +235,26 @@ def run(["set", nickname | rest]) do
     end
   end
 
+  def run(["invite"]) do
+    Common.start_pleroma()
+
+    with {:ok, token} <- Pleroma.UserInviteToken.create_token() do
+      Mix.shell().info("Generated user invite token")
+
+      url =
+        Pleroma.Web.Router.Helpers.redirect_url(
+          Pleroma.Web.Endpoint,
+          :registration_page,
+          token.token
+        )
+
+      IO.puts(url)
+    else
+      _ ->
+        Mix.shell().error("Could not create invite token.")
+    end
+  end
+
   defp set_moderator(user, value) do
     info_cng = User.Info.admin_api_update(user.info, %{is_moderator: value})
 
@@ -270,24 +290,4 @@ defp set_locked(user, value) do
 
     Mix.shell().info("Locked status of #{user.nickname}: #{user.info.locked}")
   end
-
-  def run(["invite"]) do
-    Common.start_pleroma()
-
-    with {:ok, token} <- Pleroma.UserInviteToken.create_token() do
-      Mix.shell().info("Generated user invite token")
-
-      url =
-        Pleroma.Web.Router.Helpers.redirect_url(
-          Pleroma.Web.Endpoint,
-          :registration_page,
-          token.token
-        )
-
-      IO.puts(url)
-    else
-      _ ->
-        Mix.shell().error("Could not create invite token.")
-    end
-  end
 end
diff --git a/lib/pleroma/application.ex b/lib/pleroma/application.ex
index 0b0ec0197..8705395a4 100644
--- a/lib/pleroma/application.ex
+++ b/lib/pleroma/application.ex
@@ -15,7 +15,6 @@ def user_agent() do
 
   # See http://elixir-lang.org/docs/stable/elixir/Application.html
   # for more information on OTP Applications
-  @env Mix.env()
   def start(_type, _args) do
     import Cachex.Spec
 
diff --git a/lib/pleroma/emoji.ex b/lib/pleroma/emoji.ex
index 523dea652..bedad99d6 100644
--- a/lib/pleroma/emoji.ex
+++ b/lib/pleroma/emoji.ex
@@ -165,7 +165,7 @@ defp load_from_file(file) do
 
   defp load_from_file_stream(stream) do
     stream
-    |> Stream.map(&String.strip/1)
+    |> Stream.map(&String.trim/1)
     |> Stream.map(fn line ->
       case String.split(line, ~r/,\s*/) do
         [name, file] -> {name, file}
diff --git a/lib/pleroma/filter.ex b/lib/pleroma/filter.ex
index 25ed38f34..c57bd3bf8 100644
--- a/lib/pleroma/filter.ex
+++ b/lib/pleroma/filter.ex
@@ -1,10 +1,10 @@
 defmodule Pleroma.Filter do
   use Ecto.Schema
   import Ecto.{Changeset, Query}
-  alias Pleroma.{User, Repo, Activity}
+  alias Pleroma.{User, Repo}
 
   schema "filters" do
-    belongs_to(:user, Pleroma.User)
+    belongs_to(:user, User)
     field(:filter_id, :integer)
     field(:hide, :boolean, default: false)
     field(:whole_word, :boolean, default: true)
@@ -26,7 +26,7 @@ def get(id, %{id: user_id} = _user) do
     Repo.one(query)
   end
 
-  def get_filters(%Pleroma.User{id: user_id} = user) do
+  def get_filters(%User{id: user_id} = _user) do
     query =
       from(
         f in Pleroma.Filter,
@@ -38,9 +38,9 @@ def get_filters(%Pleroma.User{id: user_id} = user) do
 
   def create(%Pleroma.Filter{user_id: user_id, filter_id: nil} = filter) do
     # If filter_id wasn't given, use the max filter_id for this user plus 1.
-    # XXX This could result in a race condition if a user tries to add two 
-    # different filters for their account from two different clients at the 
-    # same time, but that should be unlikely. 
+    # XXX This could result in a race condition if a user tries to add two
+    # different filters for their account from two different clients at the
+    # same time, but that should be unlikely.
 
     max_id_query =
       from(
diff --git a/lib/pleroma/html.ex b/lib/pleroma/html.ex
index 5daaa5e69..8a0333461 100644
--- a/lib/pleroma/html.ex
+++ b/lib/pleroma/html.ex
@@ -166,7 +166,7 @@ def scrub_attribute("img", {"src", "http" <> target}) do
     {"src", media_url}
   end
 
-  def scrub_attribute(tag, attribute), do: attribute
+  def scrub_attribute(_tag, attribute), do: attribute
 
   def scrub({"img", attributes, children}) do
     attributes =
@@ -177,9 +177,9 @@ def scrub({"img", attributes, children}) do
     {"img", attributes, children}
   end
 
-  def scrub({:comment, children}), do: ""
+  def scrub({:comment, _children}), do: ""
 
   def scrub({tag, attributes, children}), do: {tag, attributes, children}
-  def scrub({tag, children}), do: children
+  def scrub({_tag, children}), do: children
   def scrub(text), do: text
 end
diff --git a/lib/pleroma/http/connection.ex b/lib/pleroma/http/connection.ex
index db46f9e55..7b11060b2 100644
--- a/lib/pleroma/http/connection.ex
+++ b/lib/pleroma/http/connection.ex
@@ -25,7 +25,7 @@ def new(opts \\ []) do
 
   # fetch Hackney options
   #
-  defp hackney_options(opts \\ []) do
+  defp hackney_options(opts) do
     options = Keyword.get(opts, :adapter, [])
     @hackney_options ++ options
   end
diff --git a/lib/pleroma/list.ex b/lib/pleroma/list.ex
index 891c73f5a..c5bf3e083 100644
--- a/lib/pleroma/list.ex
+++ b/lib/pleroma/list.ex
@@ -23,7 +23,7 @@ def follow_changeset(list, attrs \\ %{}) do
     |> validate_required([:following])
   end
 
-  def for_user(user, opts) do
+  def for_user(user, _opts) do
     query =
       from(
         l in Pleroma.List,
@@ -46,7 +46,7 @@ def get(id, %{id: user_id} = _user) do
     Repo.one(query)
   end
 
-  def get_following(%Pleroma.List{following: following} = list) do
+  def get_following(%Pleroma.List{following: following} = _list) do
     q =
       from(
         u in User,
diff --git a/lib/pleroma/mime.ex b/lib/pleroma/mime.ex
index db8b7c742..5e1c109e9 100644
--- a/lib/pleroma/mime.ex
+++ b/lib/pleroma/mime.ex
@@ -33,10 +33,10 @@ def bin_mime_type(<<head::binary-size(@read_bytes), _::binary>>) do
     {:ok, check_mime_type(head)}
   end
 
-  def mime_type(<<_::binary>>), do: {:ok, @default}
-
   def bin_mime_type(_), do: :error
 
+  def mime_type(<<_::binary>>), do: {:ok, @default}
+
   defp fix_extension(filename, content_type) do
     parts = String.split(filename, ".")
 
diff --git a/lib/pleroma/notification.ex b/lib/pleroma/notification.ex
index a40b8f8c9..47f6b6ee7 100644
--- a/lib/pleroma/notification.ex
+++ b/lib/pleroma/notification.ex
@@ -118,7 +118,7 @@ def create_notification(%Activity{} = activity, %User{} = user) do
   def get_notified_from_activity(activity, local_only \\ true)
 
   def get_notified_from_activity(
-        %Activity{data: %{"to" => _, "type" => type} = data} = activity,
+        %Activity{data: %{"to" => _, "type" => type} = _data} = activity,
         local_only
       )
       when type in ["Create", "Like", "Announce", "Follow"] do
@@ -131,18 +131,18 @@ def get_notified_from_activity(
     User.get_users_from_set(recipients, local_only)
   end
 
-  def get_notified_from_activity(_, local_only), do: []
+  def get_notified_from_activity(_, _local_only), do: []
 
   defp maybe_notify_to_recipients(
          recipients,
-         %Activity{data: %{"to" => to, "type" => type}} = activity
+         %Activity{data: %{"to" => to, "type" => _type}} = _activity
        ) do
     recipients ++ to
   end
 
   defp maybe_notify_mentioned_recipients(
          recipients,
-         %Activity{data: %{"to" => to, "type" => type} = data} = activity
+         %Activity{data: %{"to" => _to, "type" => type} = data} = _activity
        )
        when type == "Create" do
     object = Object.normalize(data["object"])
diff --git a/lib/pleroma/plugs/authentication_plug.ex b/lib/pleroma/plugs/authentication_plug.ex
index 3ac301b97..b240ff29f 100644
--- a/lib/pleroma/plugs/authentication_plug.ex
+++ b/lib/pleroma/plugs/authentication_plug.ex
@@ -26,14 +26,7 @@ def call(
     end
   end
 
-  def call(
-        %{
-          assigns: %{
-            auth_credentials: %{password: password}
-          }
-        } = conn,
-        _
-      ) do
+  def call(%{assigns: %{auth_credentials: %{password: _}}} = conn, _) do
     Pbkdf2.dummy_checkpw()
     conn
   end
diff --git a/lib/pleroma/plugs/basic_auth_decoder_plug.ex b/lib/pleroma/plugs/basic_auth_decoder_plug.ex
index fc8fcee98..f7ebf7db2 100644
--- a/lib/pleroma/plugs/basic_auth_decoder_plug.ex
+++ b/lib/pleroma/plugs/basic_auth_decoder_plug.ex
@@ -5,7 +5,7 @@ def init(options) do
     options
   end
 
-  def call(conn, opts) do
+  def call(conn, _opts) do
     with ["Basic " <> header] <- get_req_header(conn, "authorization"),
          {:ok, userinfo} <- Base.decode64(header),
          [username, password] <- String.split(userinfo, ":", parts: 2) do
diff --git a/lib/pleroma/plugs/federating_plug.ex b/lib/pleroma/plugs/federating_plug.ex
index 4108d90af..f0442ca15 100644
--- a/lib/pleroma/plugs/federating_plug.ex
+++ b/lib/pleroma/plugs/federating_plug.ex
@@ -5,7 +5,7 @@ def init(options) do
     options
   end
 
-  def call(conn, opts) do
+  def call(conn, _opts) do
     if Keyword.get(Application.get_env(:pleroma, :instance), :federating) do
       conn
     else
diff --git a/lib/pleroma/plugs/http_security_plug.ex b/lib/pleroma/plugs/http_security_plug.ex
index 4c32653ea..f34f2364b 100644
--- a/lib/pleroma/plugs/http_security_plug.ex
+++ b/lib/pleroma/plugs/http_security_plug.ex
@@ -4,11 +4,11 @@ defmodule Pleroma.Plugs.HTTPSecurityPlug do
 
   def init(opts), do: opts
 
-  def call(conn, options) do
+  def call(conn, _options) do
     if Config.get([:http_security, :enabled]) do
-      conn =
-        merge_resp_headers(conn, headers())
-        |> maybe_send_sts_header(Config.get([:http_security, :sts]))
+      conn
+      |> merge_resp_headers(headers())
+      |> maybe_send_sts_header(Config.get([:http_security, :sts]))
     else
       conn
     end
@@ -42,7 +42,7 @@ defp csp_string do
       "script-src 'self'",
       "connect-src 'self' " <> String.replace(Pleroma.Web.Endpoint.static_url(), "http", "ws"),
       "manifest-src 'self'",
-      if @protocol == "https" do
+      if protocol == "https" do
         "upgrade-insecure-requests"
       end
     ]
diff --git a/lib/pleroma/plugs/session_authentication_plug.ex b/lib/pleroma/plugs/session_authentication_plug.ex
index 904a27952..aed619432 100644
--- a/lib/pleroma/plugs/session_authentication_plug.ex
+++ b/lib/pleroma/plugs/session_authentication_plug.ex
@@ -1,6 +1,5 @@
 defmodule Pleroma.Plugs.SessionAuthenticationPlug do
   import Plug.Conn
-  alias Pleroma.User
 
   def init(options) do
     options
diff --git a/lib/pleroma/plugs/uploaded_media.ex b/lib/pleroma/plugs/uploaded_media.ex
index 994cc8bf6..7e1e84126 100644
--- a/lib/pleroma/plugs/uploaded_media.ex
+++ b/lib/pleroma/plugs/uploaded_media.ex
@@ -8,10 +8,6 @@ defmodule Pleroma.Plugs.UploadedMedia do
   @behaviour Plug
   # no slashes
   @path "media"
-  @cache_control %{
-    default: "public, max-age=1209600",
-    error: "public, must-revalidate, max-age=160"
-  }
 
   def init(_opts) do
     static_plug_opts =
diff --git a/lib/pleroma/plugs/user_fetcher_plug.ex b/lib/pleroma/plugs/user_fetcher_plug.ex
index 9cbaaf40a..e24785ad1 100644
--- a/lib/pleroma/plugs/user_fetcher_plug.ex
+++ b/lib/pleroma/plugs/user_fetcher_plug.ex
@@ -7,7 +7,7 @@ def init(options) do
     options
   end
 
-  def call(conn, options) do
+  def call(conn, _options) do
     with %{auth_credentials: %{username: username}} <- conn.assigns,
          {:ok, %User{} = user} <- user_fetcher(username) do
       conn
diff --git a/lib/pleroma/reverse_proxy.ex b/lib/pleroma/reverse_proxy.ex
index 4ca84152a..7f328d00d 100644
--- a/lib/pleroma/reverse_proxy.ex
+++ b/lib/pleroma/reverse_proxy.ex
@@ -85,7 +85,9 @@ defmodule Pleroma.ReverseProxy do
           | {:redirect_on_failure, boolean()}
 
   @spec call(Plug.Conn.t(), url :: String.t(), [option()]) :: Plug.Conn.t()
-  def call(conn = %{method: method}, url, opts \\ []) when method in @methods do
+  def call(_conn, _url, _opts \\ [])
+
+  def call(conn = %{method: method}, url, opts) when method in @methods do
     hackney_opts =
       @default_hackney_options
       |> Keyword.merge(Keyword.get(opts, :http, []))
@@ -240,24 +242,23 @@ defp put_resp_headers(conn, headers) do
   end
 
   defp build_req_headers(headers, opts) do
-    headers =
-      headers
-      |> downcase_headers()
-      |> Enum.filter(fn {k, _} -> k in @keep_req_headers end)
-      |> (fn headers ->
-            headers = headers ++ Keyword.get(opts, :req_headers, [])
+    headers
+    |> downcase_headers()
+    |> Enum.filter(fn {k, _} -> k in @keep_req_headers end)
+    |> (fn headers ->
+          headers = headers ++ Keyword.get(opts, :req_headers, [])
 
-            if Keyword.get(opts, :keep_user_agent, false) do
-              List.keystore(
-                headers,
-                "user-agent",
-                0,
-                {"user-agent", Pleroma.Application.user_agent()}
-              )
-            else
-              headers
-            end
-          end).()
+          if Keyword.get(opts, :keep_user_agent, false) do
+            List.keystore(
+              headers,
+              "user-agent",
+              0,
+              {"user-agent", Pleroma.Application.user_agent()}
+            )
+          else
+            headers
+          end
+        end).()
   end
 
   defp build_resp_headers(headers, opts) do
@@ -268,7 +269,7 @@ defp build_resp_headers(headers, opts) do
     |> (fn headers -> headers ++ Keyword.get(opts, :resp_headers, []) end).()
   end
 
-  defp build_resp_cache_headers(headers, opts) do
+  defp build_resp_cache_headers(headers, _opts) do
     has_cache? = Enum.any?(headers, fn {k, _} -> k in @resp_cache_headers end)
 
     if has_cache? do
diff --git a/lib/pleroma/upload.ex b/lib/pleroma/upload.ex
index bf2c60102..77cba2cd2 100644
--- a/lib/pleroma/upload.ex
+++ b/lib/pleroma/upload.ex
@@ -128,19 +128,18 @@ defp get_opts(opts) do
         opts
       end
 
-    opts =
-      if Pleroma.Config.get([:instance, :dedupe_media]) == true &&
-           !Enum.member?(opts.filters, Pleroma.Upload.Filter.Dedupe) do
-        Logger.warn("""
-        Pleroma: configuration `:instance, :dedupe_media` is deprecated, please instead set:
+    if Pleroma.Config.get([:instance, :dedupe_media]) == true &&
+         !Enum.member?(opts.filters, Pleroma.Upload.Filter.Dedupe) do
+      Logger.warn("""
+      Pleroma: configuration `:instance, :dedupe_media` is deprecated, please instead set:
 
-          :pleroma, Pleroma.Upload, [filters: [Pleroma.Upload.Filter.Dedupe]]
-        """)
+      :pleroma, Pleroma.Upload, [filters: [Pleroma.Upload.Filter.Dedupe]]
+      """)
 
-        Map.put(opts, :filters, opts.filters ++ [Pleroma.Upload.Filter.Dedupe])
-      else
-        opts
-      end
+      Map.put(opts, :filters, opts.filters ++ [Pleroma.Upload.Filter.Dedupe])
+    else
+      opts
+    end
   end
 
   defp prepare_upload(%Plug.Upload{} = file, opts) do
@@ -215,8 +214,4 @@ defp url_from_spec(base_url, {:file, path}) do
     [base_url, "media", path]
     |> Path.join()
   end
-
-  defp url_from_spec({:url, url}) do
-    url
-  end
 end
diff --git a/lib/pleroma/upload/filter/dedupe.ex b/lib/pleroma/upload/filter/dedupe.ex
index 28091a627..81ddd9b29 100644
--- a/lib/pleroma/upload/filter/dedupe.ex
+++ b/lib/pleroma/upload/filter/dedupe.ex
@@ -1,7 +1,7 @@
 defmodule Pleroma.Upload.Filter.Dedupe do
   @behaviour Pleroma.Upload.Filter
 
-  def filter(upload = %Pleroma.Upload{name: name, tempfile: path}) do
+  def filter(upload = %Pleroma.Upload{name: name, tempfile: _path}) do
     extension = String.split(name, ".") |> List.last()
     shasum = :crypto.hash(:sha256, File.read!(upload.tempfile)) |> Base.encode16(case: :lower)
     filename = shasum <> "." <> extension
diff --git a/lib/pleroma/upload/filter/mogrify.ex b/lib/pleroma/upload/filter/mogrify.ex
index d6ed471ed..f106bd4b1 100644
--- a/lib/pleroma/upload/filter/mogrify.ex
+++ b/lib/pleroma/upload/filter/mogrify.ex
@@ -1,5 +1,5 @@
 defmodule Pleroma.Upload.Filter.Mogrify do
-  @behaviour Pleroma.Uploader.Filter
+  @behaviour Pleroma.Upload.Filter
 
   @type conversion :: action :: String.t() | {action :: String.t(), opts :: String.t()}
   @type conversions :: conversion() | [conversion()]
diff --git a/lib/pleroma/uploaders/local.ex b/lib/pleroma/uploaders/local.ex
index 434a6b515..2994bcd51 100644
--- a/lib/pleroma/uploaders/local.ex
+++ b/lib/pleroma/uploaders/local.ex
@@ -1,8 +1,6 @@
 defmodule Pleroma.Uploaders.Local do
   @behaviour Pleroma.Uploaders.Uploader
 
-  alias Pleroma.Web
-
   def get_file(_) do
     {:ok, {:static_dir, upload_path()}}
   end
diff --git a/lib/pleroma/uploaders/mdii.ex b/lib/pleroma/uploaders/mdii.ex
index 820cf88f5..f06755056 100644
--- a/lib/pleroma/uploaders/mdii.ex
+++ b/lib/pleroma/uploaders/mdii.ex
@@ -12,8 +12,8 @@ def get_file(file) do
   end
 
   def put_file(upload) do
-    cgi = Pleroma.Config.get([Pleroma.Uploaders.MDII, :cgi])
-    files = Pleroma.Config.get([Pleroma.Uploaders.MDII, :files])
+    cgi = Config.get([Pleroma.Uploaders.MDII, :cgi])
+    files = Config.get([Pleroma.Uploaders.MDII, :files])
 
     {:ok, file_data} = File.read(upload.tempfile)
 
diff --git a/lib/pleroma/uploaders/swift/swift.ex b/lib/pleroma/uploaders/swift/swift.ex
index a5b3d2852..d4e758bbb 100644
--- a/lib/pleroma/uploaders/swift/swift.ex
+++ b/lib/pleroma/uploaders/swift/swift.ex
@@ -9,7 +9,6 @@ def process_url(url) do
   end
 
   def upload_file(filename, body, content_type) do
-    object_url = Pleroma.Config.get!([Pleroma.Uploaders.Swift, :object_url])
     token = Pleroma.Uploaders.Swift.Keystone.get_token()
 
     case put("#{filename}", body, "X-Auth-Token": token, "Content-Type": content_type) do
diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index a290db04a..6a267ee58 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -2,7 +2,6 @@ defmodule Pleroma.User do
   use Ecto.Schema
 
   import Ecto.{Changeset, Query}
-  alias Ecto.Multi
   alias Pleroma.{Repo, User, Object, Web, Activity, Notification}
   alias Comeonin.Pbkdf2
   alias Pleroma.Formatter
@@ -10,6 +9,8 @@ defmodule Pleroma.User do
   alias Pleroma.Web.{OStatus, Websub, OAuth}
   alias Pleroma.Web.ActivityPub.{Utils, ActivityPub}
 
+  @type t :: %__MODULE__{}
+
   schema "users" do
     field(:bio, :string)
     field(:email, :string)
@@ -218,7 +219,7 @@ def maybe_direct_follow(%User{} = follower, %User{} = followed) do
     end
   end
 
-  def maybe_follow(%User{} = follower, %User{info: info} = followed) do
+  def maybe_follow(%User{} = follower, %User{info: _info} = followed) do
     if not following?(follower, followed) do
       follow(follower, followed)
     else
@@ -280,6 +281,7 @@ def unfollow(%User{} = follower, %User{} = followed) do
     end
   end
 
+  @spec following?(User.t(), User.t()) :: boolean
   def following?(%User{} = follower, %User{} = followed) do
     Enum.member?(follower.following, followed.follower_address)
   end
@@ -824,20 +826,21 @@ def tag(user_identifiers, tags) when is_list(user_identifiers) do
     end)
   end
 
+  def tag(nickname, tags) when is_binary(nickname),
+    do: tag(User.get_by_nickname(nickname), tags)
+
+  def tag(%User{} = user, tags),
+    do: update_tags(user, Enum.uniq(user.tags ++ normalize_tags(tags)))
+
   def untag(user_identifiers, tags) when is_list(user_identifiers) do
     Repo.transaction(fn ->
       for user_identifier <- user_identifiers, do: untag(user_identifier, tags)
     end)
   end
 
-  def tag(nickname, tags) when is_binary(nickname), do: tag(User.get_by_nickname(nickname), tags)
-
   def untag(nickname, tags) when is_binary(nickname),
     do: untag(User.get_by_nickname(nickname), tags)
 
-  def tag(%User{} = user, tags),
-    do: update_tags(user, Enum.uniq(user.tags ++ normalize_tags(tags)))
-
   def untag(%User{} = user, tags), do: update_tags(user, user.tags -- normalize_tags(tags))
 
   defp update_tags(%User{} = user, new_tags) do
diff --git a/lib/pleroma/user_invite_token.ex b/lib/pleroma/user_invite_token.ex
index 48ee1019a..ce804f78e 100644
--- a/lib/pleroma/user_invite_token.ex
+++ b/lib/pleroma/user_invite_token.ex
@@ -3,7 +3,8 @@ defmodule Pleroma.UserInviteToken do
 
   import Ecto.Changeset
 
-  alias Pleroma.{User, UserInviteToken, Repo}
+  alias Pleroma.UserInviteToken
+  alias Pleroma.Repo
 
   schema "user_invite_tokens" do
     field(:token, :string)
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index bf81d8039..31455343c 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -799,7 +799,7 @@ def visible_for_user?(activity, user) do
   end
 
   # guard
-  def entire_thread_visible_for_user?(nil, user), do: false
+  def entire_thread_visible_for_user?(nil, _user), do: false
 
   # child
   def entire_thread_visible_for_user?(
diff --git a/lib/pleroma/web/activity_pub/activity_pub_controller.ex b/lib/pleroma/web/activity_pub/activity_pub_controller.ex
index 3570a75cb..0317f3c8c 100644
--- a/lib/pleroma/web/activity_pub/activity_pub_controller.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub_controller.ex
@@ -141,7 +141,7 @@ def inbox(conn, params) do
     json(conn, "error")
   end
 
-  def relay(conn, params) do
+  def relay(conn, _params) do
     with %User{} = user <- Relay.get_actor(),
          {:ok, user} <- Pleroma.Web.WebFinger.ensure_keys_present(user) do
       conn
diff --git a/lib/pleroma/web/activity_pub/mrf/ensure_re_prepended.ex b/lib/pleroma/web/activity_pub/mrf/ensure_re_prepended.ex
index c8c74ede6..6fa48454a 100644
--- a/lib/pleroma/web/activity_pub/mrf/ensure_re_prepended.ex
+++ b/lib/pleroma/web/activity_pub/mrf/ensure_re_prepended.ex
@@ -5,7 +5,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.EnsureRePrepended do
 
   @reply_prefix Regex.compile!("^re:[[:space:]]*", [:caseless])
   def filter_by_summary(
-        %{"summary" => parent_summary} = parent,
+        %{"summary" => parent_summary} = _parent,
         %{"summary" => child_summary} = child
       )
       when not is_nil(child_summary) and byte_size(child_summary) > 0 and
@@ -19,7 +19,7 @@ def filter_by_summary(
     end
   end
 
-  def filter_by_summary(parent, child), do: child
+  def filter_by_summary(_parent, child), do: child
 
   def filter(%{"type" => activity_type} = object) when activity_type == "Create" do
     child = object["object"]
diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index 17b063609..e6af4b211 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -37,9 +37,9 @@ def get_actor(%{"actor" => nil, "attributedTo" => actor}) when not is_nil(actor)
   @doc """
   Checks that an imported AP object's actor matches the domain it came from.
   """
-  def contain_origin(id, %{"actor" => nil}), do: :error
+  def contain_origin(_id, %{"actor" => nil}), do: :error
 
-  def contain_origin(id, %{"actor" => actor} = params) do
+  def contain_origin(id, %{"actor" => _actor} = params) do
     id_uri = URI.parse(id)
     actor_uri = URI.parse(get_actor(params))
 
@@ -50,9 +50,9 @@ def contain_origin(id, %{"actor" => actor} = params) do
     end
   end
 
-  def contain_origin_from_id(id, %{"id" => nil}), do: :error
+  def contain_origin_from_id(_id, %{"id" => nil}), do: :error
 
-  def contain_origin_from_id(id, %{"id" => other_id} = params) do
+  def contain_origin_from_id(id, %{"id" => other_id} = _params) do
     id_uri = URI.parse(id)
     other_uri = URI.parse(other_id)
 
@@ -266,6 +266,32 @@ def fix_content_map(%{"contentMap" => content_map} = object) do
 
   def fix_content_map(object), do: object
 
+  defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
+    with true <- id =~ "follows",
+         %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
+         %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
+      {:ok, activity}
+    else
+      _ -> {:error, nil}
+    end
+  end
+
+  defp mastodon_follow_hack(_, _), do: {:error, nil}
+
+  defp get_follow_activity(follow_object, followed) do
+    with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
+         {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
+      {:ok, activity}
+    else
+      # Can't find the activity. This might a Mastodon 2.3 "Accept"
+      {:activity, nil} ->
+        mastodon_follow_hack(follow_object, followed)
+
+      _ ->
+        {:error, nil}
+    end
+  end
+
   # disallow objects with bogus IDs
   def handle_incoming(%{"id" => nil}), do: :error
   def handle_incoming(%{"id" => ""}), do: :error
@@ -331,34 +357,8 @@ def handle_incoming(
     end
   end
 
-  defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
-    with true <- id =~ "follows",
-         %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
-         %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
-      {:ok, activity}
-    else
-      _ -> {:error, nil}
-    end
-  end
-
-  defp mastodon_follow_hack(_), do: {:error, nil}
-
-  defp get_follow_activity(follow_object, followed) do
-    with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
-         {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
-      {:ok, activity}
-    else
-      # Can't find the activity. This might a Mastodon 2.3 "Accept"
-      {:activity, nil} ->
-        mastodon_follow_hack(follow_object, followed)
-
-      _ ->
-        {:error, nil}
-    end
-  end
-
   def handle_incoming(
-        %{"type" => "Accept", "object" => follow_object, "actor" => actor, "id" => id} = data
+        %{"type" => "Accept", "object" => follow_object, "actor" => _actor, "id" => _id} = data
       ) do
     with actor <- get_actor(data),
          %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
@@ -374,7 +374,7 @@ def handle_incoming(
              local: false
            }) do
       if not User.following?(follower, followed) do
-        {:ok, follower} = User.follow(follower, followed)
+        {:ok, _follower} = User.follow(follower, followed)
       end
 
       {:ok, activity}
@@ -384,7 +384,7 @@ def handle_incoming(
   end
 
   def handle_incoming(
-        %{"type" => "Reject", "object" => follow_object, "actor" => actor, "id" => id} = data
+        %{"type" => "Reject", "object" => follow_object, "actor" => _actor, "id" => _id} = data
       ) do
     with actor <- get_actor(data),
          %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
@@ -408,7 +408,7 @@ def handle_incoming(
   end
 
   def handle_incoming(
-        %{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = data
+        %{"type" => "Like", "object" => object_id, "actor" => _actor, "id" => id} = data
       ) do
     with actor <- get_actor(data),
          %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
@@ -421,7 +421,7 @@ def handle_incoming(
   end
 
   def handle_incoming(
-        %{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = data
+        %{"type" => "Announce", "object" => object_id, "actor" => _actor, "id" => id} = data
       ) do
     with actor <- get_actor(data),
          %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
@@ -492,7 +492,7 @@ def handle_incoming(
         %{
           "type" => "Undo",
           "object" => %{"type" => "Announce", "object" => object_id},
-          "actor" => actor,
+          "actor" => _actor,
           "id" => id
         } = data
       ) do
@@ -520,7 +520,7 @@ def handle_incoming(
       User.unfollow(follower, followed)
       {:ok, activity}
     else
-      e -> :error
+      _e -> :error
     end
   end
 
@@ -539,12 +539,12 @@ def handle_incoming(
       User.unblock(blocker, blocked)
       {:ok, activity}
     else
-      e -> :error
+      _e -> :error
     end
   end
 
   def handle_incoming(
-        %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = data
+        %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = _data
       ) do
     with true <- Pleroma.Config.get([:activitypub, :accept_blocks]),
          %User{local: true} = blocked = User.get_cached_by_ap_id(blocked),
@@ -554,7 +554,7 @@ def handle_incoming(
       User.block(blocker, blocked)
       {:ok, activity}
     else
-      e -> :error
+      _e -> :error
     end
   end
 
@@ -562,7 +562,7 @@ def handle_incoming(
         %{
           "type" => "Undo",
           "object" => %{"type" => "Like", "object" => object_id},
-          "actor" => actor,
+          "actor" => _actor,
           "id" => id
         } = data
       ) do
diff --git a/lib/pleroma/web/activity_pub/utils.ex b/lib/pleroma/web/activity_pub/utils.ex
index 549148989..074622f2b 100644
--- a/lib/pleroma/web/activity_pub/utils.ex
+++ b/lib/pleroma/web/activity_pub/utils.ex
@@ -292,7 +292,7 @@ def update_follow_state(%Activity{} = activity, state) do
   """
   def make_follow_data(
         %User{ap_id: follower_id},
-        %User{ap_id: followed_id} = followed,
+        %User{ap_id: followed_id} = _followed,
         activity_id
       ) do
     data = %{
diff --git a/lib/pleroma/web/admin_api/admin_api_controller.ex b/lib/pleroma/web/admin_api/admin_api_controller.ex
index 0bd85e0b6..451a87900 100644
--- a/lib/pleroma/web/admin_api/admin_api_controller.ex
+++ b/lib/pleroma/web/admin_api/admin_api_controller.ex
@@ -66,10 +66,15 @@ def right_add(conn, %{"permission_group" => permission_group, "nickname" => nick
       Ecto.Changeset.change(user)
       |> Ecto.Changeset.put_embed(:info, info_cng)
 
-    {:ok, user} = User.update_and_set_cache(cng)
+    {:ok, _user} = User.update_and_set_cache(cng)
 
+    json(conn, info)
+  end
+
+  def right_add(conn, _) do
     conn
-    |> json(info)
+    |> put_status(404)
+    |> json(%{error: "No such permission_group"})
   end
 
   def right_get(conn, %{"nickname" => nickname}) do
@@ -82,12 +87,6 @@ def right_get(conn, %{"nickname" => nickname}) do
     })
   end
 
-  def right_add(conn, _) do
-    conn
-    |> put_status(404)
-    |> json(%{error: "No such permission_group"})
-  end
-
   def right_delete(
         %{assigns: %{user: %User{:nickname => admin_nickname}}} = conn,
         %{
@@ -113,10 +112,9 @@ def right_delete(
         Ecto.Changeset.change(user)
         |> Ecto.Changeset.put_embed(:info, info_cng)
 
-      {:ok, user} = User.update_and_set_cache(cng)
+      {:ok, _user} = User.update_and_set_cache(cng)
 
-      conn
-      |> json(info)
+      json(conn, info)
     end
   end
 
@@ -127,32 +125,28 @@ def right_delete(conn, _) do
   end
 
   def relay_follow(conn, %{"relay_url" => target}) do
-    {status, message} = Relay.follow(target)
-
-    if status == :ok do
-      conn
-      |> json(target)
+    with {:ok, _message} <- Relay.follow(target) do
+      json(conn, target)
     else
-      conn
-      |> put_status(500)
-      |> json(target)
+      _ ->
+        conn
+        |> put_status(500)
+        |> json(target)
     end
   end
 
   def relay_unfollow(conn, %{"relay_url" => target}) do
-    {status, message} = Relay.unfollow(target)
-
-    if status == :ok do
-      conn
-      |> json(target)
+    with {:ok, _message} <- Relay.unfollow(target) do
+      json(conn, target)
     else
-      conn
-      |> put_status(500)
-      |> json(target)
+      _ ->
+        conn
+        |> put_status(500)
+        |> json(target)
     end
   end
 
-  @shortdoc "Get a account registeration invite token (base64 string)"
+  @doc "Get a account registeration invite token (base64 string)"
   def get_invite_token(conn, _params) do
     {:ok, token} = Pleroma.UserInviteToken.create_token()
 
@@ -160,7 +154,7 @@ def get_invite_token(conn, _params) do
     |> json(token.token)
   end
 
-  @shortdoc "Get a password reset token (base64 string) for given nickname"
+  @doc "Get a password reset token (base64 string) for given nickname"
   def get_password_reset(conn, %{"nickname" => nickname}) do
     (%User{local: true} = user) = User.get_by_nickname(nickname)
     {:ok, token} = Pleroma.PasswordResetToken.create_token(user)
diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index 728f24c7e..8f2625cef 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -122,7 +122,7 @@ def format_input(text, mentions, tags, "text/plain") do
     |> Formatter.finalize()
   end
 
-  def format_input(text, mentions, tags, "text/html") do
+  def format_input(text, mentions, _tags, "text/html") do
     text
     |> Formatter.html_escape("text/html")
     |> String.replace(~r/\r?\n/, "<br>")
@@ -236,7 +236,7 @@ def confirm_current_password(user, password) do
     end
   end
 
-  def emoji_from_profile(%{info: info} = user) do
+  def emoji_from_profile(%{info: _info} = user) do
     (Formatter.get_emoji(user.bio) ++ Formatter.get_emoji(user.name))
     |> Enum.map(fn {shortcode, url} ->
       %{
diff --git a/lib/pleroma/web/federator/federator.ex b/lib/pleroma/web/federator/federator.ex
index ac3d7c132..6dbf07e13 100644
--- a/lib/pleroma/web/federator/federator.ex
+++ b/lib/pleroma/web/federator/federator.ex
@@ -13,7 +13,6 @@ defmodule Pleroma.Web.Federator do
 
   @websub Application.get_env(:pleroma, :websub)
   @ostatus Application.get_env(:pleroma, :ostatus)
-  @httpoison Application.get_env(:pleroma, :httpoison)
   @max_jobs 20
 
   def init(args) do
@@ -134,7 +133,7 @@ def handle(:publish_single_ap, params) do
 
   def handle(
         :publish_single_websub,
-        %{xml: xml, topic: topic, callback: callback, secret: secret} = params
+        %{xml: _xml, topic: _topic, callback: _callback, secret: _secret} = params
       ) do
     case Websub.publish_one(params) do
       {:ok, _} ->
diff --git a/lib/pleroma/web/federator/retry_queue.ex b/lib/pleroma/web/federator/retry_queue.ex
index 13df40c80..3997d68a7 100644
--- a/lib/pleroma/web/federator/retry_queue.ex
+++ b/lib/pleroma/web/federator/retry_queue.ex
@@ -1,13 +1,8 @@
 defmodule Pleroma.Web.Federator.RetryQueue do
   use GenServer
-  alias Pleroma.Web.{WebFinger, Websub}
-  alias Pleroma.Web.ActivityPub.ActivityPub
+
   require Logger
 
-  @websub Application.get_env(:pleroma, :websub)
-  @ostatus Application.get_env(:pleroma, :websub)
-  @httpoison Application.get_env(:pleroma, :websub)
-  @instance Application.get_env(:pleroma, :websub)
   # initial timeout, 5 min
   @initial_timeout 30_000
   @max_retries 5
@@ -42,7 +37,7 @@ def get_retry_params(retries) do
 
   def handle_cast({:maybe_enqueue, data, transport, retries}, %{dropped: drop_count} = state) do
     case get_retry_params(retries) do
-      {:retry, timeout} ->
+      {:retry, _timeout} ->
         Process.send_after(
           __MODULE__,
           {:send, data, transport, retries},
@@ -62,7 +57,7 @@ def handle_info({:send, data, transport, retries}, %{delivered: delivery_count}
       {:ok, _} ->
         {:noreply, %{state | delivered: delivery_count + 1}}
 
-      {:error, reason} ->
+      {:error, _reason} ->
         enqueue(data, transport, retries)
         {:noreply, state}
     end
diff --git a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
index 2d7b1a00c..5c8602322 100644
--- a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
@@ -437,10 +437,7 @@ def relationships(%{assigns: %{user: user}} = conn, %{"id" => id}) do
   end
 
   # Instead of returning a 400 when no "id" params is present, Mastodon returns an empty array.
-  def relationships(%{assigns: %{user: user}} = conn, _) do
-    conn
-    |> json([])
-  end
+  def relationships(%{assigns: %{user: _user}} = conn, _), do: json(conn, [])
 
   def update_media(%{assigns: %{user: user}} = conn, data) do
     with %Object{} = object <- Repo.get(Object, data["id"]),
@@ -850,7 +847,7 @@ def rename_list(%{assigns: %{user: user}} = conn, %{"id" => id, "title" => title
   end
 
   def list_timeline(%{assigns: %{user: user}} = conn, %{"list_id" => id} = params) do
-    with %Pleroma.List{title: title, following: following} <- Pleroma.List.get(id, user) do
+    with %Pleroma.List{title: _title, following: following} <- Pleroma.List.get(id, user) do
       params =
         params
         |> Map.put("type", "Create")
@@ -983,13 +980,11 @@ def put_settings(%{assigns: %{user: user}} = conn, %{"data" => settings} = _para
 
     with changeset <- User.update_changeset(user),
          changeset <- Ecto.Changeset.put_embed(changeset, :info, info_cng),
-         {:ok, user} <- User.update_and_set_cache(changeset) do
-      conn
-      |> json(%{})
+         {:ok, _user} <- User.update_and_set_cache(changeset) do
+      json(conn, %{})
     else
       e ->
-        conn
-        |> json(%{error: inspect(e)})
+        json(conn, %{error: inspect(e)})
     end
   end
 
diff --git a/lib/pleroma/web/mastodon_api/mastodon_socket.ex b/lib/pleroma/web/mastodon_api/mastodon_socket.ex
index f3c13d1aa..d85f2a462 100644
--- a/lib/pleroma/web/mastodon_api/mastodon_socket.ex
+++ b/lib/pleroma/web/mastodon_api/mastodon_socket.ex
@@ -5,7 +5,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonSocket do
   alias Pleroma.{User, Repo}
 
   transport(
-    :streaming,
+    :websocket,
     Phoenix.Transports.WebSocket.Raw,
     # We never receive data.
     timeout: :infinity
@@ -52,13 +52,9 @@ def connect(%{"stream" => stream} = params, socket)
         _ -> stream
       end
 
-    with socket =
-           socket
-           |> assign(:topic, topic) do
+    with socket <- assign(socket, :topic, topic) do
       Pleroma.Web.Streamer.add_socket(topic, socket)
       {:ok, socket}
-    else
-      _e -> :error
     end
   end
 
diff --git a/lib/pleroma/web/mastodon_api/views/mastodon_view.ex b/lib/pleroma/web/mastodon_api/views/mastodon_view.ex
index 370fad374..1fd05d9f1 100644
--- a/lib/pleroma/web/mastodon_api/views/mastodon_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/mastodon_view.ex
@@ -1,5 +1,4 @@
 defmodule Pleroma.Web.MastodonAPI.MastodonView do
   use Pleroma.Web, :view
   import Phoenix.HTML
-  import Phoenix.HTML.Form
 end
diff --git a/lib/pleroma/web/mastodon_api/views/push_subscription_view.ex b/lib/pleroma/web/mastodon_api/views/push_subscription_view.ex
index 68bb45494..c8b95d14c 100644
--- a/lib/pleroma/web/mastodon_api/views/push_subscription_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/push_subscription_view.ex
@@ -1,6 +1,5 @@
 defmodule Pleroma.Web.MastodonAPI.PushSubscriptionView do
   use Pleroma.Web, :view
-  alias Pleroma.Web.MastodonAPI.PushSubscriptionView
 
   def render("push_subscription.json", %{subscription: subscription}) do
     %{
diff --git a/lib/pleroma/web/media_proxy/controller.ex b/lib/pleroma/web/media_proxy/controller.ex
index f496fc936..ce4f15be0 100644
--- a/lib/pleroma/web/media_proxy/controller.ex
+++ b/lib/pleroma/web/media_proxy/controller.ex
@@ -8,7 +8,7 @@ def remote(conn, params = %{"sig" => sig64, "url" => url64}) do
     with config <- Pleroma.Config.get([:media_proxy], []),
          true <- Keyword.get(config, :enabled, false),
          {:ok, url} <- MediaProxy.decode_url(sig64, url64),
-         filename <- Path.basename(URI.parse(url).path),
+         _filename <- Path.basename(URI.parse(url).path),
          :ok <- filename_matches(Map.has_key?(params, "filename"), conn.request_path, url) do
       ReverseProxy.call(conn, url, Keyword.get(config, :proxy_opts, @default_proxy_opts))
     else
diff --git a/lib/pleroma/web/oauth/oauth_controller.ex b/lib/pleroma/web/oauth/oauth_controller.ex
index d03c8b05a..20c2e799b 100644
--- a/lib/pleroma/web/oauth/oauth_controller.ex
+++ b/lib/pleroma/web/oauth/oauth_controller.ex
@@ -121,7 +121,7 @@ def token_exchange(
 
   def token_exchange(
         conn,
-        %{"grant_type" => "password", "name" => name, "password" => password} = params
+        %{"grant_type" => "password", "name" => name, "password" => _password} = params
       ) do
     params =
       params
diff --git a/lib/pleroma/web/ostatus/ostatus.ex b/lib/pleroma/web/ostatus/ostatus.ex
index 53d71440e..3ad2e7591 100644
--- a/lib/pleroma/web/ostatus/ostatus.ex
+++ b/lib/pleroma/web/ostatus/ostatus.ex
@@ -376,7 +376,7 @@ def fetch_activity_from_html_url(url) do
 
   def fetch_activity_from_url(url) do
     try do
-      with {:ok, activities} when length(activities) > 0 <- fetch_activity_from_atom_url(url) do
+      with {:ok, activities} when activities != [] <- fetch_activity_from_atom_url(url) do
         {:ok, activities}
       else
         _e ->
diff --git a/lib/pleroma/web/ostatus/ostatus_controller.ex b/lib/pleroma/web/ostatus/ostatus_controller.ex
index af6e22c2b..9dfcf0f95 100644
--- a/lib/pleroma/web/ostatus/ostatus_controller.ex
+++ b/lib/pleroma/web/ostatus/ostatus_controller.ex
@@ -157,7 +157,7 @@ defp represent_activity(
          conn,
          "activity+json",
          %Activity{data: %{"type" => "Create"}} = activity,
-         user
+         _user
        ) do
     object = Object.normalize(activity.data["object"])
 
@@ -166,7 +166,7 @@ defp represent_activity(
     |> json(ObjectView.render("object.json", %{object: object}))
   end
 
-  defp represent_activity(conn, "activity+json", _, _) do
+  defp represent_activity(_conn, "activity+json", _, _) do
     {:error, :not_found}
   end
 
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index 4d24d4c1c..9c06fac4f 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -1,8 +1,6 @@
 defmodule Pleroma.Web.Router do
   use Pleroma.Web, :router
 
-  alias Pleroma.{Repo, User, Web.Router}
-
   pipeline :api do
     plug(:accepts, ["json"])
     plug(:fetch_session)
diff --git a/lib/pleroma/web/streamer.ex b/lib/pleroma/web/streamer.ex
index 99b8b7063..29c44e9d5 100644
--- a/lib/pleroma/web/streamer.ex
+++ b/lib/pleroma/web/streamer.ex
@@ -61,8 +61,6 @@ def handle_cast(%{action: :stream, topic: "direct", item: item}, topics) do
   end
 
   def handle_cast(%{action: :stream, topic: "list", item: item}, topics) do
-    author = User.get_cached_by_ap_id(item.data["actor"])
-
     # filter the recipient list if the activity is not public, see #270.
     recipient_lists =
       case ActivityPub.is_public?(item) do
diff --git a/lib/pleroma/web/twitter_api/controllers/util_controller.ex b/lib/pleroma/web/twitter_api/controllers/util_controller.ex
index 092779010..0ed519ea6 100644
--- a/lib/pleroma/web/twitter_api/controllers/util_controller.ex
+++ b/lib/pleroma/web/twitter_api/controllers/util_controller.ex
@@ -6,9 +6,8 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
   alias Pleroma.Web.WebFinger
   alias Pleroma.Web.CommonAPI
   alias Comeonin.Pbkdf2
-  alias Pleroma.{Formatter, Emoji}
   alias Pleroma.Web.ActivityPub.ActivityPub
-  alias Pleroma.{Repo, PasswordResetToken, User}
+  alias Pleroma.{Repo, PasswordResetToken, User, Emoji}
 
   def show_password_reset(conn, %{"token" => token}) do
     with %{used: false} = token <- Repo.get_by(PasswordResetToken, %{token: token}),
diff --git a/lib/pleroma/web/twitter_api/representers/activity_representer.ex b/lib/pleroma/web/twitter_api/representers/activity_representer.ex
index fbd33f07e..2808192b0 100644
--- a/lib/pleroma/web/twitter_api/representers/activity_representer.ex
+++ b/lib/pleroma/web/twitter_api/representers/activity_representer.ex
@@ -141,7 +141,7 @@ def to_map(
   end
 
   def to_map(
-        %Activity{data: %{"object" => %{"content" => content} = object}} = activity,
+        %Activity{data: %{"object" => %{"content" => _content} = object}} = activity,
         %{user: user} = opts
       ) do
     created_at = object["published"] |> Utils.date_to_asctime()
@@ -165,7 +165,7 @@ def to_map(
 
     tags = if possibly_sensitive, do: Enum.uniq(["nsfw" | tags]), else: tags
 
-    {summary, content} = ActivityView.render_content(object)
+    {_summary, content} = ActivityView.render_content(object)
 
     html =
       HTML.filter_tags(content, User.html_filter_policy(opts[:for]))
@@ -173,7 +173,7 @@ def to_map(
 
     video =
       if object["type"] == "Video" do
-        vid = [object]
+        [object]
       else
         []
       end
diff --git a/lib/pleroma/web/twitter_api/twitter_api.ex b/lib/pleroma/web/twitter_api/twitter_api.ex
index 9c485d965..79ea48d86 100644
--- a/lib/pleroma/web/twitter_api/twitter_api.ex
+++ b/lib/pleroma/web/twitter_api/twitter_api.ex
@@ -2,18 +2,15 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
   alias Pleroma.{UserInviteToken, User, Activity, Repo, Object}
   alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Web.TwitterAPI.UserView
-  alias Pleroma.Web.{OStatus, CommonAPI}
-  alias Pleroma.Web.MediaProxy
+  alias Pleroma.Web.CommonAPI
   import Ecto.Query
 
-  @httpoison Application.get_env(:pleroma, :httpoison)
-
   def create_status(%User{} = user, %{"status" => _} = data) do
     CommonAPI.post(user, data)
   end
 
   def delete(%User{} = user, id) do
-    with %Activity{data: %{"type" => type}} <- Repo.get(Activity, id),
+    with %Activity{data: %{"type" => _type}} <- Repo.get(Activity, id),
          {:ok, activity} <- CommonAPI.delete(id, user) do
       {:ok, activity}
     end
@@ -37,7 +34,7 @@ def follow(%User{} = follower, params) do
 
   def unfollow(%User{} = follower, params) do
     with {:ok, %User{} = unfollowed} <- get_user(params),
-         {:ok, follower, follow_activity} <- User.unfollow(follower, unfollowed),
+         {:ok, follower, _follow_activity} <- User.unfollow(follower, unfollowed),
          {:ok, _activity} <- ActivityPub.unfollow(follower, unfollowed) do
       {:ok, follower, unfollowed}
     else
@@ -244,10 +241,6 @@ def search(_user, %{"q" => query} = params) do
     _activities = Repo.all(q)
   end
 
-  defp make_date do
-    DateTime.utc_now() |> DateTime.to_iso8601()
-  end
-
   # DEPRECATED mostly, context objects are now created at insertion time.
   def context_to_conversation_id(context) do
     with %Object{id: id} <- Object.get_cached_by_ap_id(context) do
diff --git a/lib/pleroma/web/twitter_api/twitter_api_controller.ex b/lib/pleroma/web/twitter_api/twitter_api_controller.ex
index 0ccf937b0..786849aa3 100644
--- a/lib/pleroma/web/twitter_api/twitter_api_controller.ex
+++ b/lib/pleroma/web/twitter_api/twitter_api_controller.ex
@@ -1,9 +1,7 @@
 defmodule Pleroma.Web.TwitterAPI.Controller do
   use Pleroma.Web, :controller
-  alias Pleroma.Formatter
   alias Pleroma.Web.TwitterAPI.{TwitterAPI, UserView, ActivityView, NotificationView}
   alias Pleroma.Web.CommonAPI
-  alias Pleroma.Web.CommonAPI.Utils, as: CommonUtils
   alias Pleroma.{Repo, Activity, Object, User, Notification}
   alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Web.ActivityPub.Utils
@@ -155,7 +153,7 @@ def notifications_read(%{assigns: %{user: user}} = conn, %{"latest_id" => latest
     |> render(NotificationView, "notification.json", %{notifications: notifications, for: user})
   end
 
-  def notifications_read(%{assigns: %{user: user}} = conn, _) do
+  def notifications_read(%{assigns: %{user: _user}} = conn, _) do
     bad_request_reply(conn, "You need to specify latest_id")
   end
 
@@ -416,7 +414,7 @@ def friend_requests(conn, params) do
     end
   end
 
-  def approve_friend_request(conn, %{"user_id" => uid} = params) do
+  def approve_friend_request(conn, %{"user_id" => uid} = _params) do
     with followed <- conn.assigns[:user],
          uid when is_number(uid) <- String.to_integer(uid),
          %User{} = follower <- Repo.get(User, uid),
@@ -436,7 +434,7 @@ def approve_friend_request(conn, %{"user_id" => uid} = params) do
     end
   end
 
-  def deny_friend_request(conn, %{"user_id" => uid} = params) do
+  def deny_friend_request(conn, %{"user_id" => uid} = _params) do
     with followed <- conn.assigns[:user],
          uid when is_number(uid) <- String.to_integer(uid),
          %User{} = follower <- Repo.get(User, uid),
diff --git a/lib/pleroma/web/xml/xml.ex b/lib/pleroma/web/xml/xml.ex
index da3f68ecb..63d3302e0 100644
--- a/lib/pleroma/web/xml/xml.ex
+++ b/lib/pleroma/web/xml/xml.ex
@@ -28,12 +28,12 @@ def parse_document(text) do
         |> :xmerl_scan.string()
 
       doc
-    catch
-      :exit, _error ->
+    rescue
+      _e ->
         Logger.debug("Couldn't parse XML: #{inspect(text)}")
         :error
-    rescue
-      e ->
+    catch
+      :exit, _error ->
         Logger.debug("Couldn't parse XML: #{inspect(text)}")
         :error
     end