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|
//! Loads a Cargo project into a static instance of analysis, without support
//! for incorporating changes.
use std::{path::Path, sync::Arc};
use anyhow::Result;
use crossbeam_channel::{unbounded, Receiver};
use hir::db::DefDatabase;
use ide::{AnalysisHost, Change};
use ide_db::{base_db::CrateGraph, FxHashMap};
use proc_macro_api::ProcMacroServer;
use project_model::{CargoConfig, ProjectManifest, ProjectWorkspace};
use vfs::{loader::Handle, AbsPath, AbsPathBuf};
use crate::reload::{load_proc_macro, ProjectFolders, SourceRootConfig};
// Note: Since this type is used by external tools that use rust-analyzer as a library
// what otherwise would be `pub(crate)` has to be `pub` here instead.
pub struct LoadCargoConfig {
pub load_out_dirs_from_check: bool,
pub with_proc_macro: bool,
pub prefill_caches: bool,
}
// Note: Since this function is used by external tools that use rust-analyzer as a library
// what otherwise would be `pub(crate)` has to be `pub` here instead.
pub fn load_workspace_at(
root: &Path,
cargo_config: &CargoConfig,
load_config: &LoadCargoConfig,
progress: &dyn Fn(String),
) -> Result<(AnalysisHost, vfs::Vfs, Option<ProcMacroServer>)> {
let root = AbsPathBuf::assert(std::env::current_dir()?.join(root));
let root = ProjectManifest::discover_single(&root)?;
let mut workspace = ProjectWorkspace::load(root, cargo_config, progress)?;
if load_config.load_out_dirs_from_check {
let build_scripts = workspace.run_build_scripts(cargo_config, progress)?;
workspace.set_build_scripts(build_scripts)
}
load_workspace(workspace, &cargo_config.extra_env, load_config)
}
// Note: Since this function is used by external tools that use rust-analyzer as a library
// what otherwise would be `pub(crate)` has to be `pub` here instead.
//
// The reason both, `load_workspace_at` and `load_workspace` are `pub` is that some of
// these tools need access to `ProjectWorkspace`, too, which `load_workspace_at` hides.
pub fn load_workspace(
ws: ProjectWorkspace,
extra_env: &FxHashMap<String, String>,
load_config: &LoadCargoConfig,
) -> Result<(AnalysisHost, vfs::Vfs, Option<ProcMacroServer>)> {
let (sender, receiver) = unbounded();
let mut vfs = vfs::Vfs::default();
let mut loader = {
let loader =
vfs_notify::NotifyHandle::spawn(Box::new(move |msg| sender.send(msg).unwrap()));
Box::new(loader)
};
let proc_macro_client = if load_config.with_proc_macro {
let (server_path, args): (_, &[_]) = match ws.find_sysroot_proc_macro_srv() {
Some(server_path) => (server_path, &[]),
None => (AbsPathBuf::assert(std::env::current_exe()?), &["proc-macro"]),
};
ProcMacroServer::spawn(server_path, args).map_err(|e| e.to_string())
} else {
Err("proc macro server disabled".to_owned())
};
let crate_graph = ws.to_crate_graph(
&mut |_, path: &AbsPath| {
load_proc_macro(proc_macro_client.as_ref().map_err(|e| &**e), path, &[])
},
&mut |path: &AbsPath| {
let contents = loader.load_sync(path);
let path = vfs::VfsPath::from(path.to_path_buf());
vfs.set_file_contents(path.clone(), contents);
vfs.file_id(&path)
},
extra_env,
);
let project_folders = ProjectFolders::new(&[ws], &[]);
loader.set_config(vfs::loader::Config {
load: project_folders.load,
watch: vec![],
version: 0,
});
tracing::debug!("crate graph: {:?}", crate_graph);
let host =
load_crate_graph(crate_graph, project_folders.source_root_config, &mut vfs, &receiver);
if load_config.prefill_caches {
host.analysis().parallel_prime_caches(1, |_| {})?;
}
Ok((host, vfs, proc_macro_client.ok()))
}
fn load_crate_graph(
crate_graph: CrateGraph,
source_root_config: SourceRootConfig,
vfs: &mut vfs::Vfs,
receiver: &Receiver<vfs::loader::Message>,
) -> AnalysisHost {
let lru_cap = std::env::var("RA_LRU_CAP").ok().and_then(|it| it.parse::<usize>().ok());
let mut host = AnalysisHost::new(lru_cap);
let mut analysis_change = Change::new();
host.raw_database_mut().set_enable_proc_attr_macros(true);
// wait until Vfs has loaded all roots
for task in receiver {
match task {
vfs::loader::Message::Progress { n_done, n_total, config_version: _ } => {
if n_done == n_total {
break;
}
}
vfs::loader::Message::Loaded { files } => {
for (path, contents) in files {
vfs.set_file_contents(path.into(), contents);
}
}
}
}
let changes = vfs.take_changes();
for file in changes {
if file.exists() {
let contents = vfs.file_contents(file.file_id).to_vec();
if let Ok(text) = String::from_utf8(contents) {
analysis_change.change_file(file.file_id, Some(Arc::new(text)))
}
}
}
let source_roots = source_root_config.partition(vfs);
analysis_change.set_roots(source_roots);
analysis_change.set_crate_graph(crate_graph);
host.apply_change(analysis_change);
host
}
#[cfg(test)]
mod tests {
use super::*;
use hir::Crate;
#[test]
fn test_loading_rust_analyzer() {
let path = Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap().parent().unwrap();
let cargo_config = CargoConfig::default();
let load_cargo_config = LoadCargoConfig {
load_out_dirs_from_check: false,
with_proc_macro: false,
prefill_caches: false,
};
let (host, _vfs, _proc_macro) =
load_workspace_at(path, &cargo_config, &load_cargo_config, &|_| {}).unwrap();
let n_crates = Crate::all(host.raw_database()).len();
// RA has quite a few crates, but the exact count doesn't matter
assert!(n_crates > 20);
}
}
|
