Respect RUST_LOG in default httpd logger

Wire up an EnvFilter that reads RUST_LOG, defaulting
to "info", and enable the env-filter feature unconditionally.

crates/radicle-httpd/Cargo.toml

@@ -13,7 +13,6 @@ build = "build.rs"
 default = []
 logfmt = [
   "tracing-logfmt",
-  "tracing-subscriber/env-filter"
 ]
 
 [[bin]]
@@ -46,7 +45,7 @@ tokio-util = { version = "0.7.18", default-features = false, features = ["io"] }
 tower-http = { version = "0.6.6", default-features = false, features = ["trace", "cors", "set-header", "decompression-full"] }
 tracing.workspace = true
 tracing-logfmt = { version = "0.3.5", optional = true }
-tracing-subscriber.workspace = true
+tracing-subscriber = { workspace = true, features = ["env-filter"] }
 url = { version = "2.5.4", features = ["serde"] }
 uuid = { version = "1.13.1", features = ["serde"] }
 

crates/radicle-httpd/radicle-httpd.1.adoc

@@ -20,6 +20,13 @@ A Radicle HTTP daemon exposing a JSON HTTP API that allows someone to browse loc
 repositories on a Radicle node via their web browser. This manual page is a
 placeholder to point you at the *--help* option.
 
+== Environment
+
+*RUST_LOG*::
+  Sets the log level. Accepts standard `tracing`/`env_logger`-style directives,
+  for example `RUST_LOG=warn` or `RUST_LOG=radicle_httpd=debug`. Defaults to
+  `info` when unset.
+
 == SEE ALSO ==
 
 *rad*(1)

crates/radicle-httpd/src/lib.rs

@@ -237,9 +237,13 @@ pub mod logger {
 
     #[cfg(not(feature = "logfmt"))]
     pub fn subscriber() -> impl tracing::Subscriber {
+        use tracing_subscriber::EnvFilter;
+
         tracing_subscriber::FmtSubscriber::builder()
             .with_target(false)
-            .with_max_level(tracing::Level::DEBUG)
+            .with_env_filter(
+                EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info")),
+            )
             .finish()
     }
 }

crates/radicle-httpd/src/main.rs

@@ -29,6 +29,11 @@ Options
     --cache        <number>          Max amount of items in cache for /tree endpoints (default: 100)
     --version, -v                    Print program version
     --help, -h                       Print help
+
+Environment
+
+    RUST_LOG                         Set the log level (e.g. RUST_LOG=warn, or
+                                     RUST_LOG=radicle_httpd=debug). Defaults to "info".
 "#;
 
 #[tokio::main]

crates/radicle-search/src/main.rs

@@ -24,6 +24,8 @@ Environment
     RADICLE_SEARCH_RESCAN_SECS         Periodic full rescan interval in seconds (default: 3600)
     RADICLE_SEARCH_RECONNECT_BACKOFF_SECS  Reconnect delay after a dropped event stream (default: 5)
     RAD_HOME, RAD_SOCKET               Standard Radicle paths
+    RUST_LOG                           Log level, e.g. RUST_LOG=warn or
+                                       RUST_LOG=radicle_search=debug (default: info)
 "#;
 
 #[tokio::main]
@@ -43,7 +45,7 @@ async fn main() {
 
 fn init_tracing() {
     let filter = tracing_subscriber::EnvFilter::try_from_default_env()
-        .unwrap_or_else(|_| tracing_subscriber::EnvFilter::new("radicle_search=info,info"));
+        .unwrap_or_else(|_| tracing_subscriber::EnvFilter::new("info"));
     tracing_subscriber::fmt().with_env_filter(filter).init();
 }