UniFFI export function to enable rust logging (#135)

.envrc

@@ -0,0 +1 @@
+RUST_LOG=info

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sargon"
-version = "0.7.12"
+version = "0.7.13"
 edition = "2021"
 build = "build.rs"
 

src/wrapped_radix_engine_toolkit/high_level/sargon_specific_types/build_information/sargon_build_information_uniffi_fn.rs

@@ -1,3 +1,5 @@
+use std::sync::Once;
+
 use crate::prelude::*;
 
 #[uniffi::export]
@@ -10,6 +12,25 @@ pub fn new_sargon_build_information_sample_other() -> SargonBuildInformation {
     SargonBuildInformation::sample_other()
 }
 
+#[uniffi::export]
+pub fn enable_logging_from_rust() {
+    init_logging()
+}
+
+/// Initializes logging
+#[cfg(not(tarpaulin_include))] // actually tricky, since we init logging from other unit tests -> crash.
+pub fn init_logging() {
+    static ONCE: Once = Once::new();
+    ONCE.call_once(|| {
+        let level = log::LevelFilter::Trace;
+        pretty_env_logger::formatted_builder()
+            .filter_level(level)
+            .try_init()
+            .expect("Should be able to setup a logger.");
+        info!("Rust: Logger initialized, log level: {:?}", level);
+    });
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;