Add more cli checks

src/file/file.odin

@@ -1,7 +1,28 @@
 package file
 
+import "core:fmt"
+import "core:os"
+
 // TODO:
 // - list files in directory
 //   - get relative path
 // - read file contents
 // - write file contents
+
+working_dir: string
+
+store_working_dir :: proc(allocator := context.allocator) {
+	wd, err := os.get_working_directory(allocator)
+	if err != nil {
+		fmt.eprintln("error: get working directory failed:", err)
+		os.exit(1)
+	}
+	working_dir = wd
+}
+
+remove_working_dir :: proc() {
+	if working_dir != "" {
+		delete(working_dir)
+		working_dir = ""
+	}
+}