2019-11-03 11:53:17 -06:00
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//! FIXME: write short doc here
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2019-11-11 16:16:59 -06:00
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use std::str::FromStr;
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2019-11-03 11:53:17 -06:00
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use std::sync::Arc;
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use ra_cfg::CfgOptions;
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2019-11-03 14:35:48 -06:00
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use rustc_hash::FxHashMap;
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use test_utils::{extract_offset, parse_fixture, CURSOR_MARKER};
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2019-11-03 11:53:17 -06:00
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use crate::{
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CrateGraph, CrateId, Edition, Env, FileId, FilePosition, RelativePathBuf, SourceDatabaseExt,
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SourceRoot, SourceRootId,
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2019-11-03 11:53:17 -06:00
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};
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pub const WORKSPACE: SourceRootId = SourceRootId(0);
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pub trait WithFixture: Default + SourceDatabaseExt + 'static {
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fn with_single_file(text: &str) -> (Self, FileId) {
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let mut db = Self::default();
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let file_id = with_single_file(&mut db, text);
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(db, file_id)
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}
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fn with_files(fixture: &str) -> Self {
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let mut db = Self::default();
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let pos = with_files(&mut db, fixture);
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assert!(pos.is_none());
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db
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}
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fn with_position(fixture: &str) -> (Self, FilePosition) {
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let mut db = Self::default();
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let pos = with_files(&mut db, fixture);
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(db, pos.unwrap())
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}
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fn test_crate(&self) -> CrateId {
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let crate_graph = self.crate_graph();
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let mut it = crate_graph.iter();
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let res = it.next().unwrap();
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assert!(it.next().is_none());
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res
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}
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2019-11-03 11:53:17 -06:00
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}
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impl<DB: SourceDatabaseExt + Default + 'static> WithFixture for DB {}
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fn with_single_file(db: &mut dyn SourceDatabaseExt, text: &str) -> FileId {
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let file_id = FileId(0);
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let rel_path: RelativePathBuf = "/main.rs".into();
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let mut source_root = SourceRoot::default();
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source_root.insert_file(rel_path.clone(), file_id);
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let mut crate_graph = CrateGraph::default();
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crate_graph.add_crate_root(
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file_id,
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Edition::Edition2018,
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CfgOptions::default(),
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Env::default(),
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);
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db.set_file_text(file_id, Arc::new(text.to_string()));
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db.set_file_relative_path(file_id, rel_path);
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db.set_file_source_root(file_id, WORKSPACE);
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db.set_source_root(WORKSPACE, Arc::new(source_root));
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db.set_crate_graph(Arc::new(crate_graph));
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file_id
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}
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fn with_files(db: &mut dyn SourceDatabaseExt, fixture: &str) -> Option<FilePosition> {
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let fixture = parse_fixture(fixture);
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let mut crate_graph = CrateGraph::default();
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let mut crates = FxHashMap::default();
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let mut crate_deps = Vec::new();
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let mut default_crate_root: Option<FileId> = None;
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let mut source_root = SourceRoot::default();
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let mut source_root_id = WORKSPACE;
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let mut source_root_prefix: RelativePathBuf = "/".into();
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let mut file_id = FileId(0);
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let mut file_position = None;
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for entry in fixture.iter() {
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let meta = match parse_meta(&entry.meta) {
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ParsedMeta::Root { path } => {
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let source_root = std::mem::replace(&mut source_root, SourceRoot::default());
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db.set_source_root(source_root_id, Arc::new(source_root));
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source_root_id.0 += 1;
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source_root_prefix = path;
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continue;
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}
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ParsedMeta::File(it) => it,
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};
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assert!(meta.path.starts_with(&source_root_prefix));
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if let Some(krate) = meta.krate {
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let crate_id =
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crate_graph.add_crate_root(file_id, meta.edition, meta.cfg, Env::default());
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let prev = crates.insert(krate.clone(), crate_id);
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assert!(prev.is_none());
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for dep in meta.deps {
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crate_deps.push((krate.clone(), dep))
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}
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} else if meta.path == "/main.rs" || meta.path == "/lib.rs" {
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assert!(default_crate_root.is_none());
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default_crate_root = Some(file_id);
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}
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let text = if entry.text.contains(CURSOR_MARKER) {
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let (offset, text) = extract_offset(&entry.text);
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assert!(file_position.is_none());
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file_position = Some(FilePosition { file_id, offset });
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text.to_string()
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} else {
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entry.text.to_string()
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};
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db.set_file_text(file_id, Arc::new(text));
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db.set_file_relative_path(file_id, meta.path.clone());
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db.set_file_source_root(file_id, source_root_id);
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source_root.insert_file(meta.path, file_id);
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file_id.0 += 1;
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}
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if crates.is_empty() {
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let crate_root = default_crate_root.unwrap();
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crate_graph.add_crate_root(
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crate_root,
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Edition::Edition2018,
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CfgOptions::default(),
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Env::default(),
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);
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} else {
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for (from, to) in crate_deps {
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let from_id = crates[&from];
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let to_id = crates[&to];
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crate_graph.add_dep(from_id, to.into(), to_id).unwrap();
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}
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}
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db.set_source_root(source_root_id, Arc::new(source_root));
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db.set_crate_graph(Arc::new(crate_graph));
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file_position
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}
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enum ParsedMeta {
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Root { path: RelativePathBuf },
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File(FileMeta),
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}
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struct FileMeta {
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path: RelativePathBuf,
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krate: Option<String>,
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deps: Vec<String>,
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cfg: CfgOptions,
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edition: Edition,
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}
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//- /lib.rs crate:foo deps:bar,baz
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fn parse_meta(meta: &str) -> ParsedMeta {
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let components = meta.split_ascii_whitespace().collect::<Vec<_>>();
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if components[0] == "root" {
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let path: RelativePathBuf = components[1].into();
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assert!(path.starts_with("/") && path.ends_with("/"));
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return ParsedMeta::Root { path };
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}
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let path: RelativePathBuf = components[0].into();
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assert!(path.starts_with("/"));
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let mut krate = None;
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let mut deps = Vec::new();
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let mut edition = Edition::Edition2018;
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let mut cfg = CfgOptions::default();
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for component in components[1..].iter() {
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let (key, value) = split1(component, ':').unwrap();
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match key {
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"crate" => krate = Some(value.to_string()),
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"deps" => deps = value.split(',').map(|it| it.to_string()).collect(),
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"edition" => edition = Edition::from_str(&value).unwrap(),
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"cfg" => {
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for key in value.split(',') {
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match split1(key, '=') {
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None => cfg.insert_atom(key.into()),
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Some((k, v)) => cfg.insert_key_value(k.into(), v.into()),
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}
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}
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}
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_ => panic!("bad component: {:?}", component),
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}
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}
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ParsedMeta::File(FileMeta { path, krate, deps, edition, cfg })
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}
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fn split1(haystack: &str, delim: char) -> Option<(&str, &str)> {
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let idx = haystack.find(delim)?;
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Some((&haystack[..idx], &haystack[idx + delim.len_utf8()..]))
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}
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