mix.exs: Dirty workaround to get port_compiler with OTP 27 support

mix.exs

@@ -13,7 +13,9 @@ defmodule Ejabberd.MixProject do
      erlc_options: erlc_options(),
      erlc_paths: ["asn1", "src"],
      # Elixir tests are starting the part of ejabberd they need
-     aliases: [test: "test --no-start"],
+     aliases: [
+       test: "test --no-start",
+       "deps.get": ["deps.get", "pc_branch"]],
      start_permanent: Mix.env() == :prod,
      language: :erlang,
      dialyzer: dialyzer(),
@@ -409,6 +411,14 @@ defmodule Ejabberd.MixProject do
   end
 end
 
+defmodule Mix.Tasks.PcBranch do
+  use Mix.Task
+  def run(_) do
+    command = "find deps -name rebar.config.script -exec sed -i 's/AppendList..pc/AppendList\(\[{pc, {git, \"https:\\/\\/github.com\\/blt\\/port_compiler.git\", {branch, \"otp-27\"}}}/g' {} ';' "
+    :os.cmd(to_charlist(command))
+  end
+end
+
 defmodule Mix.Tasks.Compile.Asn1 do
   use Mix.Task
   alias Mix.Compilers.Erlang