aboutsummaryrefslogtreecommitdiff
path: root/crates/ra_batch/src/lib.rs
blob: 7744ba85a2402ccfbb63fa45b6bbed466e6f7f30 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
//! FIXME: write short doc here

use std::{collections::HashSet, error::Error, path::Path};

use rustc_hash::FxHashMap;

use crossbeam_channel::{unbounded, Receiver};
use ra_db::{CrateGraph, FileId, SourceRootId};
use ra_ide::{AnalysisChange, AnalysisHost, FeatureFlags};
use ra_project_model::{get_rustc_cfg_options, PackageRoot, ProjectWorkspace};
use ra_vfs::{RootEntry, Vfs, VfsChange, VfsTask, Watch};
use ra_vfs_glob::RustPackageFilterBuilder;

type Result<T> = std::result::Result<T, Box<dyn Error + Send + Sync>>;

fn vfs_file_to_id(f: ra_vfs::VfsFile) -> FileId {
    FileId(f.0)
}
fn vfs_root_to_id(r: ra_vfs::VfsRoot) -> SourceRootId {
    SourceRootId(r.0)
}

pub fn load_cargo(root: &Path) -> Result<(AnalysisHost, FxHashMap<SourceRootId, PackageRoot>)> {
    let root = std::env::current_dir()?.join(root);
    let ws = ProjectWorkspace::discover(root.as_ref(), &Default::default())?;
    let project_roots = ws.to_roots();
    let (sender, receiver) = unbounded();
    let sender = Box::new(move |t| sender.send(t).unwrap());
    let (mut vfs, roots) = Vfs::new(
        project_roots
            .iter()
            .map(|pkg_root| {
                RootEntry::new(
                    pkg_root.path().clone(),
                    RustPackageFilterBuilder::default()
                        .set_member(pkg_root.is_member())
                        .into_vfs_filter(),
                )
            })
            .collect(),
        sender,
        Watch(false),
    );

    // FIXME: cfg options?
    let default_cfg_options = {
        let mut opts = get_rustc_cfg_options();
        opts.insert_atom("test".into());
        opts.insert_atom("debug_assertion".into());
        opts
    };

    let (crate_graph, _crate_names) =
        ws.to_crate_graph(&default_cfg_options, &mut |path: &Path| {
            let vfs_file = vfs.load(path);
            log::debug!("vfs file {:?} -> {:?}", path, vfs_file);
            vfs_file.map(vfs_file_to_id)
        });
    log::debug!("crate graph: {:?}", crate_graph);

    let source_roots = roots
        .iter()
        .map(|&vfs_root| {
            let source_root_id = vfs_root_to_id(vfs_root);
            let project_root = project_roots
                .iter()
                .find(|it| it.path() == &vfs.root2path(vfs_root))
                .unwrap()
                .clone();
            (source_root_id, project_root)
        })
        .collect::<FxHashMap<_, _>>();
    let host = load(&source_roots, crate_graph, &mut vfs, receiver);
    Ok((host, source_roots))
}

pub fn load(
    source_roots: &FxHashMap<SourceRootId, PackageRoot>,
    crate_graph: CrateGraph,
    vfs: &mut Vfs,
    receiver: Receiver<VfsTask>,
) -> 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, FeatureFlags::default());
    let mut analysis_change = AnalysisChange::new();
    analysis_change.set_crate_graph(crate_graph);

    // wait until Vfs has loaded all roots
    let mut roots_loaded = HashSet::new();
    for task in receiver {
        vfs.handle_task(task);
        let mut done = false;
        for change in vfs.commit_changes() {
            match change {
                VfsChange::AddRoot { root, files } => {
                    let source_root_id = vfs_root_to_id(root);
                    let is_local = source_roots[&source_root_id].is_member();
                    log::debug!(
                        "loaded source root {:?} with path {:?}",
                        source_root_id,
                        vfs.root2path(root)
                    );
                    analysis_change.add_root(source_root_id, is_local);
                    analysis_change.set_debug_root_path(
                        source_root_id,
                        source_roots[&source_root_id].path().display().to_string(),
                    );

                    let mut file_map = FxHashMap::default();
                    for (vfs_file, path, text) in files {
                        let file_id = vfs_file_to_id(vfs_file);
                        analysis_change.add_file(source_root_id, file_id, path.clone(), text);
                        file_map.insert(path, file_id);
                    }
                    roots_loaded.insert(source_root_id);
                    if roots_loaded.len() == vfs.n_roots() {
                        done = true;
                    }
                }
                VfsChange::AddFile { root, file, path, text } => {
                    let source_root_id = vfs_root_to_id(root);
                    let file_id = vfs_file_to_id(file);
                    analysis_change.add_file(source_root_id, file_id, path, text);
                }
                VfsChange::RemoveFile { .. } | VfsChange::ChangeFile { .. } => {
                    // We just need the first scan, so just ignore these
                }
            }
        }
        if done {
            break;
        }
    }

    host.apply_change(analysis_change);
    host
}

#[cfg(test)]
mod tests {
    use super::*;
    use ra_hir::Crate;

    #[test]
    fn test_loading_rust_analyzer() {
        let path = Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap().parent().unwrap();
        let (host, _roots) = load_cargo(path).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);
    }
}