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diff --git a/lib/mix/tasks/pleroma/frontend.ex b/lib/mix/tasks/pleroma/frontend.ex
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Mix.Tasks.Pleroma.Frontend do
+  @doc """
+  Scenario 1:
+  - clone repo to /frontends/fe/_src_tmp
+  - build fe
+  - move built files into /frontends/fe
+  - remove frontends/fe/_src_tmp
+
+  Scenario 2:
+  - download bundle from CI to /frontends/fe/_src_tmp
+  - move build files
+  - remove tmp
+
+  Scenario 3:
+  - move built files from _path to /frontends/fe
+
+  Pleroma:
+    /dist
+  Kenoma:
+    /build
+  Fedi:
+    /dist
+  Admin:
+    /dist
+  Mastodon
+    /public
+  """
+  use Mix.Task
+
+  import Mix.Pleroma
+
+  # alias Pleroma.Config
+
+  @shortdoc "Manages bundled Pleroma frontends"
+  @moduledoc File.read!("docs/administration/CLI_tasks/frontend.md")
+
+  @frontends %{
+    "admin" => %{"project" => "pleroma/admin-fe"},
+    "kenoma" => %{"project" => "lambadalambda/kenoma"},
+    "mastodon" => %{"project" => "pleroma/mastofe"},
+    "pleroma" => %{"project" => "pleroma/pleroma-fe"},
+    "fedi" => %{"project" => "dockyard/fedi-fe"}
+  }
+  @known_frontends Map.keys(@frontends)
+
+  @ref_local "__local__"
+
+  def run(["install", "none" | _args]) do
+    shell_info("Skipping frontend installation because none was requested")
+  end
+
+  def run(["install", unknown_fe | _args]) when unknown_fe not in @known_frontends do
+    shell_error(
+      "Frontend \"#{unknown_fe}\" is not known. Known frontends are: #{
+        Enum.join(@known_frontends, ", ")
+      }"
+    )
+  end
+
+  def run(["install", frontend | args]) do
+    log_level = Logger.level()
+    Logger.configure(level: :warn)
+    {:ok, _} = Application.ensure_all_started(:pleroma)
+
+    {options, [], []} =
+      OptionParser.parse(
+        args,
+        strict: [
+          ref: :string,
+          path: :string,
+          develop: :boolean
+        ]
+      )
+
+    path = options[:path]
+    ref = local_path_frontend_ref(path)
+
+    dest =
+      Path.join([
+        Pleroma.Config.get!([:instance, :static_dir]),
+        "frontends",
+        frontend,
+        ref
+      ])
+
+    shell_info("Installing frontend #{frontend} (#{ref}) from local path")
+
+    install_bundle(frontend, path, dest)
+    shell_info("Frontend #{frontend} (#{ref}) installed to #{dest}")
+
+    Logger.configure(level: log_level)
+  end
+
+  defp local_path_frontend_ref(path) do
+    path
+    |> Path.join("package.json")
+    |> File.read()
+    |> case do
+      {:ok, bin} ->
+        bin
+        |> Jason.decode!()
+        |> Map.get("version", @ref_local)
+
+      _ ->
+        @ref_local
+    end
+  end
+
+  defp post_install("mastodon", path) do
+    File.rename!("#{path}/assets/sw.js", "#{path}/sw.js")
+
+    {:ok, files} = File.ls(path)
+
+    Enum.each(files, fn file ->
+      with false <- file in ~w(packs sw.js) do
+        [path, file]
+        |> Path.join()
+        |> File.rm_rf!()
+      end
+    end)
+  end
+
+  defp post_install(_frontend, _path) do
+    :ok
+  end
+
+  defp install_bundle(frontend, source, dest) do
+    from =
+      case frontend do
+        "mastodon" ->
+          "public"
+
+        "kenoma" ->
+          "build"
+
+        _ ->
+          "dist"
+      end
+
+    File.mkdir_p!(dest)
+    File.cp_r!(Path.join([source, from]), dest)
+    post_install(frontend, dest)
+    :ok
+  end
+end