aboutsummaryrefslogtreecommitdiff
path: root/crates/ra_lsp_server/src/server_world.rs
blob: 4f3c231d319c48b1db65eacfdab811e05a197f2a (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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
use std::{
    path::PathBuf,
    sync::Arc,
};

use languageserver_types::Url;
use ra_ide_api::{
    Analysis, AnalysisChange, AnalysisHost, CrateGraph, FileId, LibraryData,
    SourceRootId
};
use ra_vfs::{Vfs, VfsChange, VfsFile, VfsRoot};
use rustc_hash::FxHashMap;
use relative_path::RelativePathBuf;
use parking_lot::RwLock;
use failure::format_err;

use crate::{
    project_model::{ProjectWorkspace, TargetKind},
    Result,
};

#[derive(Debug)]
pub struct ServerWorldState {
    pub roots_to_scan: usize,
    pub root: PathBuf,
    pub workspaces: Arc<Vec<ProjectWorkspace>>,
    pub analysis_host: AnalysisHost,
    pub vfs: Arc<RwLock<Vfs>>,
}

pub struct ServerWorld {
    pub workspaces: Arc<Vec<ProjectWorkspace>>,
    pub analysis: Analysis,
    pub vfs: Arc<RwLock<Vfs>>,
}

impl ServerWorldState {
    pub fn new(root: PathBuf, workspaces: Vec<ProjectWorkspace>) -> ServerWorldState {
        let mut change = AnalysisChange::new();

        let mut roots = Vec::new();
        roots.push(root.clone());
        for ws in workspaces.iter() {
            for pkg in ws.cargo.packages() {
                roots.push(pkg.root(&ws.cargo).to_path_buf());
            }
            for krate in ws.sysroot.crates() {
                roots.push(krate.root_dir(&ws.sysroot).to_path_buf())
            }
        }
        roots.sort();
        roots.dedup();
        let roots_to_scan = roots.len();
        let (mut vfs, roots) = Vfs::new(roots);
        for r in roots {
            let is_local = vfs.root2path(r).starts_with(&root);
            change.add_root(SourceRootId(r.0.into()), is_local);
        }

        let mut crate_graph = CrateGraph::default();
        for ws in workspaces.iter() {
            // First, load std
            let mut sysroot_crates = FxHashMap::default();
            for krate in ws.sysroot.crates() {
                if let Some(file_id) = vfs.load(krate.root(&ws.sysroot)) {
                    let file_id = FileId(file_id.0.into());
                    sysroot_crates.insert(krate, crate_graph.add_crate_root(file_id));
                }
            }
            for from in ws.sysroot.crates() {
                for to in from.deps(&ws.sysroot) {
                    let name = to.name(&ws.sysroot);
                    if let (Some(&from), Some(&to)) =
                        (sysroot_crates.get(&from), sysroot_crates.get(&to))
                    {
                        crate_graph.add_dep(from, name.clone(), to);
                    }
                }
            }

            let libstd = ws
                .sysroot
                .std()
                .and_then(|it| sysroot_crates.get(&it).map(|&it| it));

            let mut pkg_to_lib_crate = FxHashMap::default();
            let mut pkg_crates = FxHashMap::default();
            // Next, create crates for each package, target pair
            for pkg in ws.cargo.packages() {
                let mut lib_tgt = None;
                for tgt in pkg.targets(&ws.cargo) {
                    let root = tgt.root(&ws.cargo);
                    if let Some(file_id) = vfs.load(root) {
                        let file_id = FileId(file_id.0.into());
                        let crate_id = crate_graph.add_crate_root(file_id);
                        if tgt.kind(&ws.cargo) == TargetKind::Lib {
                            lib_tgt = Some(crate_id);
                            pkg_to_lib_crate.insert(pkg, crate_id);
                        }
                        pkg_crates
                            .entry(pkg)
                            .or_insert_with(Vec::new)
                            .push(crate_id);
                    }
                }

                // Set deps to the std and to the lib target of the current package
                for &from in pkg_crates.get(&pkg).into_iter().flatten() {
                    if let Some(to) = lib_tgt {
                        if to != from {
                            crate_graph.add_dep(from, pkg.name(&ws.cargo).into(), to);
                        }
                    }
                    if let Some(std) = libstd {
                        crate_graph.add_dep(from, "std".into(), std);
                    }
                }
            }

            // Now add a dep ednge from all targets of upstream to the lib
            // target of downstream.
            for pkg in ws.cargo.packages() {
                for dep in pkg.dependencies(&ws.cargo) {
                    if let Some(&to) = pkg_to_lib_crate.get(&dep.pkg) {
                        for &from in pkg_crates.get(&pkg).into_iter().flatten() {
                            crate_graph.add_dep(from, dep.name.clone(), to);
                        }
                    }
                }
            }
        }
        change.set_crate_graph(crate_graph);

        let mut analysis_host = AnalysisHost::default();
        analysis_host.apply_change(change);
        ServerWorldState {
            roots_to_scan,
            root,
            workspaces: Arc::new(workspaces),
            analysis_host,
            vfs: Arc::new(RwLock::new(vfs)),
        }
    }

    /// Returns a vec of libraries
    /// FIXME: better API here
    pub fn process_changes(
        &mut self,
    ) -> Vec<(SourceRootId, Vec<(FileId, RelativePathBuf, Arc<String>)>)> {
        let changes = self.vfs.write().commit_changes();
        if changes.is_empty() {
            return Vec::new();
        }
        let mut libs = Vec::new();
        let mut change = AnalysisChange::new();
        for c in changes {
            match c {
                VfsChange::AddRoot { root, files } => {
                    let root_path = self.vfs.read().root2path(root);
                    if root_path.starts_with(&self.root) {
                        self.roots_to_scan -= 1;
                        for (file, path, text) in files {
                            change.add_file(
                                SourceRootId(root.0.into()),
                                FileId(file.0.into()),
                                path,
                                text,
                            );
                        }
                    } else {
                        let files = files
                            .into_iter()
                            .map(|(vfsfile, path, text)| (FileId(vfsfile.0.into()), path, text))
                            .collect();
                        libs.push((SourceRootId(root.0.into()), files));
                    }
                }
                VfsChange::AddFile {
                    root,
                    file,
                    path,
                    text,
                } => {
                    change.add_file(
                        SourceRootId(root.0.into()),
                        FileId(file.0.into()),
                        path,
                        text,
                    );
                }
                VfsChange::RemoveFile { root, file, path } => {
                    change.remove_file(SourceRootId(root.0.into()), FileId(file.0.into()), path)
                }
                VfsChange::ChangeFile { file, text } => {
                    change.change_file(FileId(file.0.into()), text);
                }
            }
        }
        self.analysis_host.apply_change(change);
        libs
    }

    pub fn add_lib(&mut self, data: LibraryData) {
        self.roots_to_scan -= 1;
        let mut change = AnalysisChange::new();
        change.add_library(data);
        self.analysis_host.apply_change(change);
    }

    pub fn snapshot(&self) -> ServerWorld {
        ServerWorld {
            workspaces: Arc::clone(&self.workspaces),
            analysis: self.analysis_host.analysis(),
            vfs: Arc::clone(&self.vfs),
        }
    }
}

impl ServerWorld {
    pub fn analysis(&self) -> &Analysis {
        &self.analysis
    }

    pub fn uri_to_file_id(&self, uri: &Url) -> Result<FileId> {
        let path = uri
            .to_file_path()
            .map_err(|()| format_err!("invalid uri: {}", uri))?;
        let file = self
            .vfs
            .read()
            .path2file(&path)
            .ok_or_else(|| format_err!("unknown file: {}", path.display()))?;
        Ok(FileId(file.0.into()))
    }

    pub fn file_id_to_uri(&self, id: FileId) -> Result<Url> {
        let path = self.vfs.read().file2path(VfsFile(id.0.into()));
        let url = Url::from_file_path(&path)
            .map_err(|_| format_err!("can't convert path to url: {}", path.display()))?;
        Ok(url)
    }

    pub fn path_to_uri(&self, root: SourceRootId, path: &RelativePathBuf) -> Result<Url> {
        let base = self.vfs.read().root2path(VfsRoot(root.0.into()));
        let path = path.to_path(base);
        let url = Url::from_file_path(&path)
            .map_err(|_| format_err!("can't convert path to url: {}", path.display()))?;
        Ok(url)
    }
}