Merge 'sqlite3: Switch to tracing logger' from Pekka Enberg

...we now actually see logging from core too.

Reviewed-by: Jussi Saurio <jussi.saurio@gmail.com>

Closes #1554

Cargo.lock

@@ -1976,7 +1976,9 @@ dependencies = [
  "env_logger 0.11.7",
  "libc",
  "limbo_core",
- "log",
+ "tracing",
+ "tracing-appender",
+ "tracing-subscriber",
 ]
 
 [[package]]

sqlite3/Cargo.toml

@@ -25,7 +25,9 @@ crate-type = ["lib", "cdylib", "staticlib"]
 env_logger = { version = "0.11.3", default-features = false }
 libc = "0.2.169"
 limbo_core = { path = "../core" }
-log = "0.4.22"
+tracing = "0.1.41"
+tracing-appender = "0.2.3"
+tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
 
 [package.metadata.capi.header]
 name = "sqlite3.h"

sqlite3/src/lib.rs

@@ -2,7 +2,7 @@
 #![allow(non_camel_case_types)]
 
 use limbo_core::Value;
-use log::trace;
+use tracing::trace;
 use std::ffi::{self, CStr, CString};
 
 use std::rc::Rc;
@@ -85,7 +85,7 @@ static INIT_DONE: std::sync::Once = std::sync::Once::new();
 #[no_mangle]
 pub unsafe extern "C" fn sqlite3_initialize() -> ffi::c_int {
     INIT_DONE.call_once(|| {
-        env_logger::init();
+        tracing_subscriber::fmt::init();
     });
     SQLITE_OK
 }
@@ -131,7 +131,7 @@ pub unsafe extern "C" fn sqlite3_open(
             SQLITE_OK
         }
         Err(e) => {
-            log::trace!("error opening database {}: {:?}", filename, e);
+            trace!("error opening database {}: {:?}", filename, e);
             SQLITE_CANTOPEN
         }
     }