[pbs-devel] [PATCH] add tracing init_cli_logger and remove old one

[Gabriel Goller]

Remove the proxmox-router init_cli_logger function used in client
binaries such as `proxmox-backup-client`, `proxmox-backup-manager`,
'pxar', etc...
Add a new init_cli_logger function that uses tracing instead of
env_logger. It checks if the task is in a workertask and prints the
message either to stdout or to the tasklog (this is neccessary for
commands in proxmox-backup-manager that call api handlers that start
workerthreads from the client).

Signed-off-by: Gabriel Goller <g.goller at proxmox.com>
---
 proxmox-log/src/lib.rs        | 37 ++++++++++++++++++++++++++++++++++-
 proxmox-router/src/cli/mod.rs | 13 ------------
 2 files changed, 36 insertions(+), 14 deletions(-)

diff --git a/proxmox-log/src/lib.rs b/proxmox-log/src/lib.rs
index 796d10145b9e..806d16a68d32 100644
--- a/proxmox-log/src/lib.rs
+++ b/proxmox-log/src/lib.rs
@@ -8,7 +8,8 @@ use std::sync::{Arc, Mutex};
 use tokio::task::futures::TaskLocalFuture;
 use tracing::Level;
 use tracing_log::{AsLog, LogTracer};
-use tracing_subscriber::filter::{filter_fn, LevelFilter};
+use tracing_subscriber::filter::filter_fn;
+pub use tracing_subscriber::filter::LevelFilter;
 use tracing_subscriber::prelude::*;
 
 use tasklog_layer::TasklogLayer;
@@ -125,3 +126,37 @@ impl LogContext {
         &self.logger
     }
 }
+
+/// Initialize default logger for CLI binaries
+pub fn init_cli_logger(
+    env_var_name: &str,
+    default_log_level: LevelFilter,
+) -> Result<(), anyhow::Error> {
+    let mut log_level = default_log_level;
+    if let Ok(v) = env::var(env_var_name) {
+        if let Ok(l) = v.parse::<LevelFilter>() {
+            log_level = l;
+        }
+    }
+
+    let format = tracing_subscriber::fmt::format()
+        .with_level(false)
+        .without_time()
+        .with_target(false)
+        .compact();
+
+    let registry = tracing_subscriber::registry()
+        .with(
+            tracing_subscriber::fmt::layer()
+                .event_format(format)
+                .with_filter(filter_fn(|metadata| {
+                    !LogContext::exists() || *metadata.level() >= Level::ERROR
+                }))
+                .with_filter(log_level),
+        )
+        .with(TasklogLayer {}.with_filter(log_level));
+
+    tracing::subscriber::set_global_default(registry)?;
+    LogTracer::init_with_filter(log_level.as_log())?;
+    Ok(())
+}
diff --git a/proxmox-router/src/cli/mod.rs b/proxmox-router/src/cli/mod.rs
index 3cc41ab3ea94..148edb467494 100644
--- a/proxmox-router/src/cli/mod.rs
+++ b/proxmox-router/src/cli/mod.rs
@@ -57,19 +57,6 @@ pub use readline::*;
 /// return a list of all possible values.
 pub type CompletionFunction = fn(&str, &HashMap<String, String>) -> Vec<String>;
 
-/// Initialize default logger for CLI binaries
-pub fn init_cli_logger(env_var_name: &str, default_log_level: &str) {
-    env_logger::Builder::from_env(
-        env_logger::Env::new().filter_or(env_var_name, default_log_level),
-    )
-    .write_style(env_logger::WriteStyle::Never)
-    .format_level(false)
-    .format_module_path(false)
-    .format_target(false)
-    .format_timestamp(None)
-    .init();
-}
-
 #[derive(Clone, Copy, PartialEq, Eq, Debug)]
 /// Use for simple yes or no questions, where booleans can be confusing, especially if there's a
 /// default response to consider. The implementation provides query helper for the CLI.
-- 
2.39.2