Allow timestamping log entries

src/bin/electrs.rs

@@ -52,6 +52,11 @@ fn main() {
     stderrlog::new()
         .module(module_path!())
         .verbosity(config.verbosity)
+        .timestamp(if config.timestamp {
+            stderrlog::Timestamp::Microsecond
+        } else {
+            stderrlog::Timestamp::Off
+        })
         .init()
         .expect("logging initialization failed");
     if let Err(e) = run_server(&config) {

src/config.rs

@@ -5,6 +5,7 @@ use std::net::SocketAddr;
 #[derive(Debug)]
 pub struct Config {
     pub verbosity: usize,
+    pub timestamp: bool,
     pub network_type: Network,       // bitcoind JSONRPC endpoint
     pub db_path: String,             // RocksDB directory path
     pub rpc_addr: SocketAddr,        // for serving Electrum clients
@@ -21,6 +22,11 @@ impl Config {
                     .multiple(true)
                     .help("Increase logging verbosity"),
             )
+            .arg(
+                Arg::with_name("timestamp")
+                    .long("timestamp")
+                    .help("Prepend log lines with a timestamp"),
+            )
             .arg(
                 Arg::with_name("db_dir")
                     .short("d")
@@ -41,6 +47,7 @@ impl Config {
         let db_dir = m.value_of("db_dir").unwrap_or("./db");
         Config {
             verbosity: m.occurrences_of("verbosity") as usize,
+            timestamp: m.is_present("timestamp"),
             network_type,
             db_path: match network_type {
                 Network::Mainnet => format!("{}/mainnet", db_dir),