1 files changed, 45 insertions, 0 deletions
diff --git a/games/rstnode/rst-core/src/config/io.rs b/games/rstnode/rst-core/src/config/io.rs
new file mode 100644
index 000000000000..07aa7e7b3d3f
--- /dev/null
+++ b/games/rstnode/rst-core/src/config/io.rs
@@ -0,0 +1,45 @@
+//! I/O utilities to load configurations from disk
+
+use super::MapCfg;
+use serde_yaml::from_str;
+use std::{
+    fs::File,
+    io::{self, Read},
+    path::Path,
+};
+
+/// Encode error state while loading a map configuration
+pub enum Error {
+    Io(String),
+    Parsing(String),
+}
+
+impl From<io::Error> for Error {
+    fn from(e: io::Error) -> Self {
+        Self::Io(e.to_string())
+    }
+}
+
+impl From<serde_yaml::Error> for Error {
+    fn from(e: serde_yaml::Error) -> Self {
+        Self::Parsing(e.to_string())
+    }
+}
+
+/// Load a map YAML configuration from disk
+///
+/// This file format is structured according to the configuration
+/// types in [config](crate::config).  An example configuration is
+/// provided below.
+///
+/// ```yaml
+/// nodes:
+///   - 
+/// ```
+pub fn load_map<'p>(p: impl Into<&'p Path>) -> Result<MapCfg, Error> {
+    let mut f = File::open(p.into())?;
+    let mut s = String::new();
+    f.read_to_string(&mut s)?;
+
+    Ok(from_str(s.as_str())?)
+}