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Right now
env_logger
always logs to stderr. This might be undesireable in some cases.This PR adds a way to configure the log target. It can be set to stdout if desired.
Note that writing to stdout is implemented with
println!
instead ofwriteln!
, so that the output is properly captured in tests. See https://users.rust-lang.org/t/cargo-doesnt-capture-stderr-of-running-tests/9222/.I did not find out how to properly add a test, but tested it manually. If you want a test to be added, pointers would be welcome.