feat: add option for process cwd (.env support)

tests/binary_test/BUILD.bazel

@@ -43,3 +43,17 @@ sh_test(
         "//tests/binary_test:BUILD.bazel",
     ],
 )
+
+bun_binary(
+    name = "env_cwd_bin",
+    entry_point = "env.ts",
+    data = [".env"],
+    working_dir = "entry_point",
+)
+
+sh_test(
+    name = "bun_binary_env_cwd_test",
+    srcs = ["run_env_binary.sh"],
+    args = ["$(location :env_cwd_bin)"],
+    data = [":env_cwd_bin"],
+)

tests/binary_test/env.ts

@@ -0,0 +1,2 @@
+const value = process.env.BUN_ENV_CWD_TEST ?? "missing";
+console.log(value);

tests/binary_test/run_env_binary.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+binary="$1"
+output="$(${binary})"
+
+if [[ ${output} != "from-dotenv" ]]; then
+  echo "Expected .env value from entry-point directory, got: ${output}" >&2
+  exit 1
+fi