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Modify logging to use SCCACHE_LOG. #822

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Aug 5, 2020
Merged

Modify logging to use SCCACHE_LOG. #822

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8 changes: 4 additions & 4 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -223,13 +223,13 @@ the container for you - you'll need to do that yourself.
Debugging
---------

You can run the server manually in foreground mode by running `SCCACHE_START_SERVER=1 SCCACHE_NO_DAEMON=1 sccache`, and send logging to stderr by setting the [`RUST_LOG` environment variable](https://docs.rs/env_logger/0.7.1/env_logger/#enabling-logging) for example
You can run the server manually in foreground mode by running `SCCACHE_START_SERVER=1 SCCACHE_NO_DAEMON=1 sccache`, and send logging to stderr by setting the [`SCCACHE_LOG` environment variable](https://docs.rs/env_logger/0.7.1/env_logger/#enabling-logging) for example

RUST_LOG=debug SCCACHE_START_SERVER=1 SCCACHE_NO_DAEMON=1 sccache
SCCACHE_LOG=debug SCCACHE_START_SERVER=1 SCCACHE_NO_DAEMON=1 sccache

Alternately, you can set the `SCCACHE_ERROR_LOG` environment variable to a path and set `RUST_LOG` to get the server process to redirect its logging there (including the output of unhandled panics, since the server sets `RUST_BACKTRACE=1` internally).
Alternately, you can set the `SCCACHE_ERROR_LOG` environment variable to a path and set `SCCACHE_LOG` to get the server process to redirect its logging there (including the output of unhandled panics, since the server sets `RUST_BACKTRACE=1` internally).

SCCACHE_ERROR_LOG=/tmp/sccache_log.txt RUST_LOG=debug sccache
SCCACHE_ERROR_LOG=/tmp/sccache_log.txt SCCACHE_LOG=debug sccache

---

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6 changes: 4 additions & 2 deletions src/lib.rs
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Expand Up @@ -61,6 +61,8 @@ pub mod util;

use std::env;

const LOGGING_ENV: &str = "SCCACHE_LOG";

pub fn main() {
init_logging();
std::process::exit(match cmdline::parse() {
Expand All @@ -87,8 +89,8 @@ pub fn main() {
}

fn init_logging() {
if env::var("RUST_LOG").is_ok() {
match env_logger::try_init() {
if env::var(LOGGING_ENV).is_ok() {
match env_logger::Builder::from_env(LOGGING_ENV).try_init() {
Ok(_) => (),
Err(e) => panic!(format!("Failed to initalize logging: {:?}", e)),
}
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