Add OSDK command line interface

osdk/src/error.rs

@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: MPL-2.0
+
+#[repr(i32)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Errno {
+    CreateCrate = 1,
+    GetMetadata = 2,
+    AddRustToolchain = 3,
+    ParseMetadata = 4,
+    ExecuteCommand = 5,
+}
+
+/// Print error message to console
+#[macro_export]
+macro_rules! error_msg {
+    () => {
+        std::eprint!("")
+    };
+    ($($arg:tt)*) => {{
+        std::eprint!("[Error]: ");
+        std::eprint!($($arg)*);
+        std::eprint!("\n")
+    }};
+}
+
+/// Print warning message to console
+#[macro_export]
+macro_rules! warn_msg {
+    () => {
+        std::eprint!("")
+    };
+    ($($arg:tt)*) => {{
+        std::eprint!("[Warn]: ");
+        std::eprint!($($arg)*);
+        std::eprint!("\n")
+    }};
+}