first version

generator/src/logging.rs

@@ -0,0 +1,21 @@
+use log::LevelFilter;
+use log4rs::append::console::{ConsoleAppender, Target};
+use log4rs::config::{Appender, Root};
+use log4rs::{init_config, Config, Handle};
+
+pub fn setup_logging() -> anyhow::Result<Handle> {
+    let threshold = if cfg!(debug_assertions) {
+        LevelFilter::Debug
+    } else {
+        LevelFilter::Info
+    };
+
+    let config = Config::builder()
+        .appender(Appender::builder().build(
+            "stderr",
+            Box::new(ConsoleAppender::builder().target(Target::Stderr).build()),
+        ))
+        .build(Root::builder().appender("stderr").build(threshold))?;
+
+    Ok(init_config(config)?)
+}