]>
Commit | Line | Data |
---|---|---|
f20569fa XL |
1 | /// Checks if we're in a nightly build. |
2 | /// | |
3 | /// The environment variable `CFG_RELEASE_CHANNEL` is set during the rustc bootstrap | |
4 | /// to "stable", "beta", or "nightly" depending on what toolchain is being built. | |
5 | /// If we are being built as part of the stable or beta toolchains, we want | |
6 | /// to disable unstable configuration options. | |
7 | /// | |
8 | /// If we're being built by cargo (e.g., `cargo +nightly install rustfmt-nightly`), | |
9 | /// `CFG_RELEASE_CHANNEL` is not set. As we only support being built against the | |
10 | /// nightly compiler when installed from crates.io, default to nightly mode. | |
11 | #[macro_export] | |
12 | macro_rules! is_nightly_channel { | |
13 | () => { | |
14 | option_env!("CFG_RELEASE_CHANNEL").map_or(true, |c| c == "nightly" || c == "dev") | |
15 | }; | |
16 | } |