acap_logging/
lib.rs

1#![forbid(unsafe_code)]
2#![allow(clippy::needless_doctest_main)]
3#![doc = include_str!("../README.md")]
4#[cfg(feature = "tty")]
5use std::{env, io::IsTerminal};
6
7use log::debug;
8
9fn init_syslog() {
10    libsyslog::Syslog::builder()
11        .level(log::LevelFilter::Debug)
12        .build()
13        .init()
14        .unwrap();
15}
16
17/// Set up app-logging as appropriate for the environment, then run the provided function.
18///
19/// If stdout is a terminal, write to stderr.
20/// Otherwise, write to the system logger.
21///
22/// # Panics
23///
24/// This function will panic if
25/// it fails to initialize the appropriate logger or
26/// a global logger has already been initialized.
27pub fn init_logger() {
28    // Using `su -pc "..."` just says the "Connection to ... closed", and
29    // I have not found another way to run as the SDK user over ssh and allocate a tty, so
30    // if we detect an `env_logger` configuration, we write to stderr anyway.
31    #[cfg(feature = "tty")]
32    if std::io::stdout().is_terminal()
33        || env::var_os("RUST_LOG").is_some()
34        || env::var_os("RUST_LOG_STYLE").is_some()
35    {
36        env_logger::init();
37        debug!("Logging initialized");
38        return;
39    }
40
41    init_syslog();
42    debug!("Logging initialized");
43}
acap_logging/lib.rs

acap_logging/
lib.rs
