From: Jakub Jirutka <jakub@jirutka.cz>
Date: Sun, 07 May 2023 00:08:59 +0200
Subject: [PATCH] Add support for logging into syslog and don't output
  ANSI sequences (colours)

This is more a quick&dirty approach, not meant to be upstreamed as-is.

--- a/src/garage/main.rs
+++ b/src/garage/main.rs
@@ -156,10 +156,36 @@
 		};
 		std::env::set_var("RUST_LOG", default_log)
 	}
-	tracing_subscriber::fmt()
-		.with_writer(std::io::stderr)
-		.with_env_filter(tracing_subscriber::filter::EnvFilter::from_default_env())
-		.init();
+
+    let env_filter = tracing_subscriber::filter::EnvFilter::from_default_env();
+
+    if std::env::var("GARAGE_SYSLOG").is_ok() {
+        use std::ffi::CStr;
+        use syslog_tracing::{Facility, Options, Syslog};
+
+        let syslog = Syslog::new(
+            CStr::from_bytes_with_nul(b"garage\0").unwrap(),
+            Options::LOG_PID | Options::LOG_PERROR,
+            Facility::Daemon,
+        ).expect("Unable to init syslog");
+
+        tracing_subscriber::fmt()
+            .with_writer(syslog)
+            .with_env_filter(env_filter)
+            .with_ansi(false)  // disable ANSI escape sequences (colours)
+            .with_file(false)
+            .with_level(false)
+            .without_time()
+            .compact()
+            .init();
+    } else {
+        tracing_subscriber::fmt()
+            .with_writer(std::io::stderr)
+            .with_env_filter(env_filter)
+            .with_ansi(false)  // disable ANSI escape sequences (colours)
+            .init();
+    }
+
 	sodiumoxide::init().expect("Unable to init sodiumoxide");
 
 	let res = match opt.cmd {
--- a/src/garage/Cargo.toml
+++ b/src/garage/Cargo.toml
@@ -58,6 +58,8 @@
 opentelemetry-otlp = { version = "0.10", optional = true }
 prometheus = { version = "0.13", optional = true }
 
+syslog-tracing = "0.1.0"
+
 [dev-dependencies]
 aws-sdk-s3 = "0.19"
 chrono = "0.4"
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1113,6 +1113,7 @@
  "sha2 0.10.6",
  "static_init",
  "structopt",
+ "syslog-tracing",
  "timeago",
  "tokio",
  "toml",
@@ -3559,6 +3560,17 @@
  "quote",
  "syn",
  "unicode-xid",
+]
+
+[[package]]
+name = "syslog-tracing"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4cf9ff1f9f8e5ba220a58bbccb0375f4cabd785f96a8683b31389cefd91be747"
+dependencies = [
+ "libc",
+ "tracing-core",
+ "tracing-subscriber",
 ]
 
 [[package]]