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Read default cfgs from rustc

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uHOOCCOOHu 2019-10-03 02:02:53 +08:00
parent e0100e63ae
commit 1067a1c5f6
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8 changed files with 76 additions and 14 deletions
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44
crates/ra_project_model/src/lib.rs
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@ -9,6 +9,7 @@ use std::{
fs::File,
io::BufReader,
path::{Path, PathBuf},
process::Command,
};
use ra_cfg::CfgOptions;
@ -118,6 +119,7 @@ impl ProjectWorkspace {
pub fn to_crate_graph(
&self,
default_cfg_options: &CfgOptions,
load: &mut dyn FnMut(&Path) -> Option<FileId>,
) -> (CrateGraph, FxHashMap<CrateId, String>) {
let mut crate_graph = CrateGraph::default();
@ -134,7 +136,9 @@ impl ProjectWorkspace {
};
// FIXME: cfg options
// Default to enable test for workspace crates.
let cfg_options = CfgOptions::default().atom("test".into());
let cfg_options = default_cfg_options
.clone()
.features(krate.features.iter().map(Into::into));
crates.insert(
crate_id,
crate_graph.add_crate_root(file_id, edition, cfg_options),
@ -164,9 +168,8 @@ impl ProjectWorkspace {
let mut sysroot_crates = FxHashMap::default();
for krate in sysroot.crates() {
if let Some(file_id) = load(krate.root(&sysroot)) {
// FIXME: cfg options
// Crates from sysroot have `cfg(test)` disabled
let cfg_options = CfgOptions::default();
let cfg_options = default_cfg_options.clone().remove_atom(&"test".into());
let crate_id =
crate_graph.add_crate_root(file_id, Edition::Edition2018, cfg_options);
sysroot_crates.insert(krate, crate_id);
@ -197,9 +200,9 @@ impl ProjectWorkspace {
let root = tgt.root(&cargo);
if let Some(file_id) = load(root) {
let edition = pkg.edition(&cargo);
// FIXME: cfg options
// Default to enable test for workspace crates.
let cfg_options = CfgOptions::default().atom("test".into());
let cfg_options = default_cfg_options
.clone()
.features(pkg.features(&cargo).iter().map(Into::into));
let crate_id =
crate_graph.add_crate_root(file_id, edition, cfg_options);
names.insert(crate_id, pkg.name(&cargo).to_string());
@ -301,3 +304,32 @@ fn find_cargo_toml(path: &Path) -> Result<PathBuf> {
}
Err(format!("can't find Cargo.toml at {}", path.display()))?
}
pub fn get_rustc_cfg_options() -> CfgOptions {
let mut cfg_options = CfgOptions::default();
match (|| -> Result<_> {
// `cfg(test)` ans `cfg(debug_assertion)` is handled outside, so we suppress them here.
let output = Command::new("rustc").args(&["--print", "cfg", "-O"]).output()?;
if !output.status.success() {
Err("failed to get rustc cfgs")?;
}
Ok(String::from_utf8(output.stdout)?)
})() {
Ok(rustc_cfgs) => {
for line in rustc_cfgs.lines() {
match line.find('=') {
None => cfg_options = cfg_options.atom(line.into()),
Some(pos) => {
let key = &line[..pos];
let value = line[pos + 1..].trim_matches('"');
cfg_options = cfg_options.key_value(key.into(), value.into());
}
}
}
}
Err(e) => log::error!("failed to get rustc cfgs: {}", e),
}
cfg_options
}