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