bdbaf80073It is not uncommon that users who are new to tracing look at the examples in the `master` branch of the repository and find that they don't compile. This is because they are examples which compile with the code from the master branch, which is for the as yet unreleased tracing 0.2.0 ecosystem. Users should instead go to the `v0.1.x` branch to find examples compatible with the crates published on crates.io. This change adds a doc-comment to the beginning of every example file informing the user of this fact and suggesting that they check out the `v0.1.x` branch instead.
34 lines
1.3 KiB
Rust
34 lines
1.3 KiB
Rust
//! NOTE: This is pre-release documentation for the upcoming tracing 0.2.0 ecosystem. For the
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//! release examples, please see the `v0.1.x` branch instead.
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//!
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//! An example demonstrating how `fmt::Subcriber` can write to multiple
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//! destinations (in this instance, `stdout` and a file) simultaneously.
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#[path = "fmt/yak_shave.rs"]
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mod yak_shave;
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use std::io;
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use tracing_subscriber::{fmt, subscribe::CollectExt, EnvFilter};
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fn main() {
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let dir = tempfile::tempdir().expect("Failed to create tempdir");
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let file_appender = tracing_appender::rolling::hourly(dir, "example.log");
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let (non_blocking, _guard) = tracing_appender::non_blocking(file_appender);
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let collector = tracing_subscriber::registry()
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.with(EnvFilter::from_default_env().add_directive(tracing::Level::TRACE.into()))
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.with(fmt::Subscriber::new().with_writer(io::stdout))
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.with(fmt::Subscriber::new().with_writer(non_blocking));
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tracing::collect::set_global_default(collector).expect("Unable to set a global collector");
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let number_of_yaks = 3;
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// this creates a new event, outside of any spans.
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tracing::info!(number_of_yaks, "preparing to shave yaks");
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let number_shaved = yak_shave::shave_all(number_of_yaks);
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tracing::info!(
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all_yaks_shaved = number_shaved == number_of_yaks,
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"yak shaving completed."
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);
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}
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