diff options
Diffstat (limited to 'src/librustc_driver/lib.rs')
| -rw-r--r-- | src/librustc_driver/lib.rs | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs index 5af114abeea..1c2d956e279 100644 --- a/src/librustc_driver/lib.rs +++ b/src/librustc_driver/lib.rs @@ -16,6 +16,7 @@ #![crate_name = "rustc_driver"] #![experimental] +#![staged_api] #![crate_type = "dylib"] #![crate_type = "rlib"] #![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png", @@ -46,7 +47,7 @@ pub use syntax::diagnostic; use rustc_trans::back::link; use rustc::session::{config, Session, build_session}; -use rustc::session::config::{Input, PrintRequest}; +use rustc::session::config::{Input, PrintRequest, UnstableFeatures}; use rustc::lint::Lint; use rustc::lint; use rustc::metadata; @@ -132,7 +133,11 @@ fn run_compiler(args: &[String]) { _ => early_error("multiple input filenames provided") }; + let mut sopts = sopts; + sopts.unstable_features = get_unstable_features_setting(); + let mut sess = build_session(sopts, input_file_path, descriptions); + let cfg = config::build_configuration(&sess); if print_crate_info(&sess, Some(&input), &odir, &ofile) { return @@ -181,6 +186,21 @@ fn run_compiler(args: &[String]) { driver::compile_input(sess, cfg, &input, &odir, &ofile, None); } +pub fn get_unstable_features_setting() -> UnstableFeatures { + // Whether this is a feature-staged build, i.e. on the beta or stable channel + let disable_unstable_features = option_env!("CFG_DISABLE_UNSTABLE_FEATURES").is_some(); + // The secret key needed to get through the rustc build itself by + // subverting the unstable features lints + let bootstrap_secret_key = option_env!("CFG_BOOTSTRAP_KEY"); + // The matching key to the above, only known by the build system + let bootstrap_provided_key = os::getenv("RUSTC_BOOTSTRAP_KEY"); + match (disable_unstable_features, bootstrap_secret_key, bootstrap_provided_key) { + (_, Some(ref s), Some(ref p)) if s == p => UnstableFeatures::Cheat, + (true, _, _) => UnstableFeatures::Disallow, + (false, _, _) => UnstableFeatures::Default + } +} + /// Returns a version string such as "0.12.0-dev". pub fn release_str() -> Option<&'static str> { option_env!("CFG_RELEASE") |