simple test function

lib/testcontainers_elixir.ex

@@ -5,6 +5,8 @@ defmodule TestcontainersElixir do
   """
 
   def hello do
+    :hello.parse_docker_host(System.get_env("DOCKER_HOST", ""))
+    |> IO.inspect()
     :hello.fetch_hello("world")
   end
 end

src/hello.gleam

@@ -1,5 +1,8 @@
+// SPDX-License-Identifier: Apache-2.0
 import gleam/hackney
 import gleam/http/request
+import gleam/uri
+import gleam/option.{None, Option, Some, unwrap}
 
 pub fn fetch_hello(name: String) -> String {
   let assert Ok(request) =
@@ -12,3 +15,39 @@ pub fn fetch_hello(name: String) -> String {
 
   response.body
 }
+
+pub type DockerHost {
+  DockerHost(
+    scheme: String,
+    socket_host: Option(String),
+    socket_port: Option(Int),
+    host: Option(String),
+    port: Option(Int),
+  )
+}
+
+// a function to parse DOCKER_HOST env var value
+// will crash if provided with nil String for docker_host
+pub fn parse_docker_host(docker_host: String) -> Option(DockerHost) {
+  let assert Ok(uri) = uri.parse(docker_host)
+  let assert scheme = unwrap(uri.scheme, "no scheme")
+  case scheme {
+    "tcp" | "http" ->
+      Some(DockerHost(
+        scheme: scheme,
+        socket_host: None,
+        socket_port: None,
+        host: uri.host,
+        port: uri.port,
+      ))
+    "unix" | "npipe" ->
+      Some(DockerHost(
+        scheme: scheme,
+        socket_host: Some("localhost"),
+        socket_port: Some(2375),
+        host: uri.host,
+        port: uri.port,
+      ))
+    _ -> None
+  }
+}