X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Futils.ex;h=c6892dec229b5969ee1d2a30e66534799bc3fef4;hb=f917285b72dbc770be40478e1a55973f29d5db7d;hp=8d36a0001fa5e8ab5e50fef0d32b85ce8f131bf9;hpb=6cc5341d26426f98a53a6e46787f1457f974f321;p=akkoma

diff --git a/lib/pleroma/utils.ex b/lib/pleroma/utils.ex
index 8d36a0001..c6892dec2 100644
--- a/lib/pleroma/utils.ex
+++ b/lib/pleroma/utils.ex
@@ -1,12 +1,63 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Utils do
+  @posix_error_codes ~w(
+    eacces eagain ebadf ebadmsg ebusy edeadlk edeadlock edquot eexist efault
+    efbig eftype eintr einval eio eisdir eloop emfile emlink emultihop
+    enametoolong enfile enobufs enodev enolck enolink enoent enomem enospc
+    enosr enostr enosys enotblk enotdir enotsup enxio eopnotsupp eoverflow
+    eperm epipe erange erofs espipe esrch estale etxtbsy exdev
+  )a
+
   def compile_dir(dir) when is_binary(dir) do
     dir
     |> File.ls!()
     |> Enum.map(&Path.join(dir, &1))
     |> Kernel.ParallelCompiler.compile()
   end
+
+  @doc """
+  POSIX-compliant check if command is available in the system
+
+  ## Examples
+      iex> command_available?("git")
+      true
+      iex> command_available?("wrongcmd")
+      false
+
+  """
+  @spec command_available?(String.t()) :: boolean()
+  def command_available?(command) do
+    match?({_output, 0}, System.cmd("sh", ["-c", "command -v #{command}"]))
+  end
+
+  @doc "creates the uniq temporary directory"
+  @spec tmp_dir(String.t()) :: {:ok, String.t()} | {:error, :file.posix()}
+  def tmp_dir(prefix \\ "") do
+    sub_dir =
+      [
+        prefix,
+        Timex.to_unix(Timex.now()),
+        :os.getpid(),
+        String.downcase(Integer.to_string(:rand.uniform(0x100000000), 36))
+      ]
+      |> Enum.join("-")
+
+    tmp_dir = Path.join(System.tmp_dir!(), sub_dir)
+
+    case File.mkdir(tmp_dir) do
+      :ok -> {:ok, tmp_dir}
+      error -> error
+    end
+  end
+
+  @spec posix_error_message(atom()) :: binary()
+  def posix_error_message(code) when code in @posix_error_codes do
+    error_message = Gettext.dgettext(Pleroma.Web.Gettext, "posix_errors", "#{code}")
+    "(POSIX error: #{error_message})"
+  end
+
+  def posix_error_message(_), do: ""
 end