Set up Android and iOS logging

The correct deps and code will be compiled in depending on the target platform. Also adds an init_convex_logging function exposed over FFI for the client to enable the logging functionality.

Author: dowski

rust/Cargo.lock

@@ -19,16 +19,32 @@ async-once-cell = { version = "0.5.3" }
 serde_json = { version = "1.0.120" }
 rustls = { version = "0.23", features = ["aws-lc-rs"] }
 aws-lc-rs = { version = "1.14", features = ["bindgen"], optional = true }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 
 [features]
 default = ["aws-lc-rs"]
+max_level_off = ["tracing/max_level_off"]
+max_level_error = ["tracing/max_level_error"]
+max_level_warn = ["tracing/max_level_warn"]
 
 [dev-dependencies]
 maplit = { version = "1" }
 
 [build-dependencies]
 uniffi = { version = "0.28", features = [ "build" ]}
 
+[target.'cfg(target_os = "android")'.dependencies]
+tracing-android = "0.2"
+android_logger = "0.14"
+
+[target.'cfg(target_os = "ios")'.dependencies]
+tracing-oslog = "0.3"
+oslog = "0.2"
+
+[profile.release]
+features = ["max_level_warn"] 
+
 [lib]
 crate-type = ["cdylib", "lib", "staticlib"]
 name = "convexmobile"

rust/Cargo.toml

@@ -1,4 +1,6 @@
-namespace convexmobile {};
+namespace convexmobile {
+    void init_convex_logging();
+};
 
 [Error]
 interface ClientError {