1 files changed, 48 insertions, 0 deletions
diff --git a/src/runtime/nonhosted.go b/src/runtime/nonhosted.go
new file mode 100644
index 000000000..61f5023df
--- /dev/null
+++ b/src/runtime/nonhosted.go
@@ -0,0 +1,48 @@
+// +build baremetal js
+
+package runtime
+
+// This file is for non-hosted environments, that don't support command line
+// parameters or environment variables. To still be able to run certain tests,
+// command line parameters and environment variables can be passed to the binary
+// by setting the variables `runtime.osArgs` and `runtime.osEnv`, both of which
+// are strings separated by newlines.
+//
+// The primary use case is `tinygo test`, which takes some parameters (such as
+// -test.v).
+
+var env []string
+
+//go:linkname syscall_runtime_envs syscall.runtime_envs
+func syscall_runtime_envs() []string {
+	return env
+}
+
+var osArgs string
+var osEnv string
+
+func init() {
+	if osArgs != "" {
+		s := osArgs
+		start := 0
+		for i := 0; i < len(s); i++ {
+			if s[i] == 0 {
+				args = append(args, s[start:i])
+				start = i + 1
+			}
+		}
+		args = append(args, s[start:])
+	}
+
+	if osEnv != "" {
+		s := osEnv
+		start := 0
+		for i := 0; i < len(s); i++ {
+			if s[i] == 0 {
+				env = append(env, s[start:i])
+				start = i + 1
+			}
+		}
+		env = append(env, s[start:])
+	}
+}