router: add init_cli_logger helper function

Signed-off-by: Hannes Laimer <h.laimer@proxmox.com>
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

proxmox-router/Cargo.toml

@@ -10,6 +10,7 @@ exclude = [ "debian" ]
 
 [dependencies]
 anyhow = "1.0"
+env_logger = "0.9"
 http = "0.2"
 hyper = { version = "0.14", features = [ "full" ] }
 nix = "0.24.1"

proxmox-router/src/cli/mod.rs

@@ -49,6 +49,17 @@ 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();
+}
+
 /// Define a simple CLI command.
 pub struct CliCommand {
     /// The Schema definition.