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Centralize nightly compiler flags handling

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This commit is contained in:
Guillaume Gomez 2016-03-15 09:09:29 +01:00
parent f34ae3f7ed
commit ded701bf64
4 changed files with 154 additions and 157 deletions
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53
src/librustc_driver/lib.rs
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@ -68,7 +68,7 @@ use rustc_save_analysis as save;
use rustc_trans::back::link;
use rustc::session::{config, Session, build_session, CompileResult};
use rustc::session::config::{Input, PrintRequest, OutputType, ErrorOutputType};
use rustc::session::config::{get_unstable_features_setting, OptionStability};
use rustc::session::config::{get_unstable_features_setting, nightly_options};
use rustc::middle::cstore::CrateStore;
use rustc::lint::Lint;
use rustc::lint;
@ -89,7 +89,7 @@ use std::str;
use std::sync::{Arc, Mutex};
use std::thread;
use rustc::session::{early_error, early_warn};
use rustc::session::early_error;
use syntax::ast;
use syntax::parse::{self, PResult};
@ -910,51 +910,7 @@ pub fn handle_options(args: &[String]) -> Option<getopts::Matches> {
// (unstable option being used on stable)
// * If we're a historically stable-but-should-be-unstable option then we
// emit a warning that we're going to turn this into an error soon.
let has_z_unstable_options = matches.opt_strs("Z")
.iter()
.any(|x| *x == "unstable-options");
let really_allows_unstable_options = match get_unstable_features_setting() {
UnstableFeatures::Disallow => false,
_ => true,
};
for opt in config::rustc_optgroups() {
if opt.stability == OptionStability::Stable {
continue
}
let opt_name = if opt.opt_group.long_name.is_empty() {
&opt.opt_group.short_name
} else {
&opt.opt_group.long_name
};
if !matches.opt_present(opt_name) {
continue
}
if opt_name != "Z" && !has_z_unstable_options {
let msg = format!("the `-Z unstable-options` flag must also be \
passed to enable the flag `{}`", opt_name);
early_error(ErrorOutputType::default(), &msg);
}
if really_allows_unstable_options {
continue
}
match opt.stability {
OptionStability::Unstable => {
let msg = format!("the option `{}` is only accepted on the \
nightly compiler", opt_name);
early_error(ErrorOutputType::default(), &msg);
}
OptionStability::UnstableButNotReally => {
let msg = format!("the option `{}` is is unstable and should \
only be used on the nightly compiler, but \
it is currently accepted for backwards \
compatibility; this will soon change, \
see issue #31847 for more details",
opt_name);
early_warn(ErrorOutputType::default(), &msg);
}
OptionStability::Stable => {}
}
}
nightly_options::check_nightly_options(&matches, &config::rustc_optgroups());
if matches.opt_present("h") || matches.opt_present("help") {
// Only show unstable options in --help if we *really* accept unstable
@ -962,12 +918,11 @@ pub fn handle_options(args: &[String]) -> Option<getopts::Matches> {
// the stable channel of Rust which was accidentally allowed
// historically.
usage(matches.opt_present("verbose"),
has_z_unstable_options && really_allows_unstable_options);
nightly_options::is_unstable_enabled(&matches));
return None;
}
// Don't handle -W help here, because we might first load plugins.
let r = matches.opt_strs("Z");
if r.iter().any(|x| *x == "help") {
describe_debug_flags();