tracing_init/
lib.rs

1/// A Parameter to configure tracing subscriber.
2#[derive(Debug)]
3pub struct Parameter<'a> {
4    /// Default RUST_LOG.
5    pub directive_env_key: &'a str,
6    pub display_source: bool,
7    pub display_target: bool,
8    pub color: bool,
9}
10
11impl Default for Parameter<'_> {
12    fn default() -> Self {
13       Self {
14           directive_env_key: "RUST_LOG",
15           display_source: true,
16           display_target: false,
17           color: true,
18       }
19    }
20}
21
22/// Initialize global tracing subscriber with default parameter.
23pub fn init() {
24    init_with(Parameter::default())
25}
26
27/// Initialize global tracing subscriber.
28pub fn init_with(param: Parameter) {
29    use tracing_subscriber::{filter, fmt::time};
30
31
32    let Parameter {
33        directive_env_key,
34        display_source,
35        display_target,
36        color,
37    } = param;
38
39    if std::env::var(directive_env_key).is_err(){
40        std::env::set_var(directive_env_key, "info");
41    }
42
43    tracing_subscriber::fmt()
44        .with_timer(time::UtcTime::rfc_3339())
45        .with_ansi(color)
46        .with_file(display_source)
47        .with_line_number(display_source)
48        .with_target(display_target)
49        .with_env_filter(filter::EnvFilter::from_env(directive_env_key))
50        .init()
51}
tracing_init/lib.rs

tracing_init/
lib.rs
