2 files changed, 28 insertions, 0 deletions
diff --git a/lib/pleroma/utils.ex b/lib/pleroma/utils.ex
index 6b8e3accf..21d1159be 100644
--- a/lib/pleroma/utils.ex
+++ b/lib/pleroma/utils.ex
@@ -9,4 +9,19 @@ defmodule Pleroma.Utils do
     |> 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
 end
diff --git a/test/utils_test.exs b/test/utils_test.exs
new file mode 100644
index 000000000..6134c21b5
--- /dev/null
+++ b/test/utils_test.exs
@@ -0,0 +1,13 @@
+defmodule Pleroma.UtilsTest do
+  use ExUnit.Case
+
+  describe "command_available?" do
+    test "available command" do
+      assert Pleroma.Utils.command_available?("iex") === true
+    end
+
+    test "unavailable command" do
+      assert Pleroma.Utils.command_available?("nonexistingcmd") === false
+    end
+  end
+end