use anyhow::{anyhow, Context, Result};
use async_trait::async_trait;
use futures::StreamExt;
pub use language::*;
use lsp::LanguageServerBinary;
use smol::fs::{self, File};
use std::{any::Any, path::PathBuf, sync::Arc};
use util::{
fs::remove_matching,
github::{latest_github_release, GitHubLspBinaryVersion},
ResultExt,
};
pub struct CLspAdapter;
#[async_trait]
impl super::LspAdapter for CLspAdapter {
async fn name(&self) -> LanguageServerName {
LanguageServerName("clangd".into())
}
fn short_name(&self) -> &'static str {
"clangd"
}
async fn fetch_latest_server_version(
&self,
delegate: &dyn LspAdapterDelegate,
) -> Result<Box<dyn 'static + Send + Any>> {
let release = latest_github_release("clangd/clangd", false, delegate.http_client()).await?;
let asset_name = format!("clangd-mac-{}.zip", release.name);
let asset = release
.assets
.iter()
.find(|asset| asset.name == asset_name)
.ok_or_else(|| anyhow!("no asset found matching {:?}", asset_name))?;
let version = GitHubLspBinaryVersion {
name: release.name,
url: asset.browser_download_url.clone(),
};
Ok(Box::new(version) as Box<_>)
}
async fn fetch_server_binary(
&self,
version: Box<dyn 'static + Send + Any>,
container_dir: PathBuf,
delegate: &dyn LspAdapterDelegate,
) -> Result<LanguageServerBinary> {
let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
let zip_path = container_dir.join(format!("clangd_{}.zip", version.name));
let version_dir = container_dir.join(format!("clangd_{}", version.name));
let binary_path = version_dir.join("bin/clangd");
if fs::metadata(&binary_path).await.is_err() {
let mut response = delegate
.http_client()
.get(&version.url, Default::default(), true)
.await
.context("error downloading release")?;
let mut file = File::create(&zip_path).await?;
if !response.status().is_success() {
Err(anyhow!(
"download failed with status {}",
response.status().to_string()
))?;
}
futures::io::copy(response.body_mut(), &mut file).await?;
let unzip_status = smol::process::Command::new("unzip")
.current_dir(&container_dir)
.arg(&zip_path)
.output()
.await?
.status;
if !unzip_status.success() {
Err(anyhow!("failed to unzip clangd archive"))?;
}
remove_matching(&container_dir, |entry| entry != version_dir).await;
}
Ok(LanguageServerBinary {
path: binary_path,
arguments: vec![],
})
}
async fn cached_server_binary(
&self,
container_dir: PathBuf,
_: &dyn LspAdapterDelegate,
) -> Option<LanguageServerBinary> {
get_cached_server_binary(container_dir).await
}
async fn installation_test_binary(
&self,
container_dir: PathBuf,
) -> Option<LanguageServerBinary> {
get_cached_server_binary(container_dir)
.await
.map(|mut binary| {
binary.arguments = vec!["--help".into()];
binary
})
}
async fn label_for_completion(
&self,
completion: &lsp::CompletionItem,
language: &Arc<Language>,
) -> Option<CodeLabel> {
let label = completion
.label
.strip_prefix('•')
.unwrap_or(&completion.label)
.trim();
match completion.kind {
Some(lsp::CompletionItemKind::FIELD) if completion.detail.is_some() => {
let detail = completion.detail.as_ref().unwrap();
let text = format!("{} {}", detail, label);
let source = Rope::from(format!("struct S {{ {} }}", text).as_str());
let runs = language.highlight_text(&source, 11..11 + text.len());
return Some(CodeLabel {
filter_range: detail.len() + 1..text.len(),
text,
runs,
});
}
Some(lsp::CompletionItemKind::CONSTANT | lsp::CompletionItemKind::VARIABLE)
if completion.detail.is_some() =>
{
let detail = completion.detail.as_ref().unwrap();
let text = format!("{} {}", detail, label);
let runs = language.highlight_text(&Rope::from(text.as_str()), 0..text.len());
return Some(CodeLabel {
filter_range: detail.len() + 1..text.len(),
text,
runs,
});
}
Some(lsp::CompletionItemKind::FUNCTION | lsp::CompletionItemKind::METHOD)
if completion.detail.is_some() =>
{
let detail = completion.detail.as_ref().unwrap();
let text = format!("{} {}", detail, label);
let runs = language.highlight_text(&Rope::from(text.as_str()), 0..text.len());
return Some(CodeLabel {
filter_range: detail.len() + 1..text.rfind('(').unwrap_or(text.len()),
text,
runs,
});
}
Some(kind) => {
let highlight_name = match kind {
lsp::CompletionItemKind::STRUCT
| lsp::CompletionItemKind::INTERFACE
| lsp::CompletionItemKind::CLASS
| lsp::CompletionItemKind::ENUM => Some("type"),
lsp::CompletionItemKind::ENUM_MEMBER => Some("variant"),
lsp::CompletionItemKind::KEYWORD => Some("keyword"),
lsp::CompletionItemKind::VALUE | lsp::CompletionItemKind::CONSTANT => {
Some("constant")
}
_ => None,
};
if let Some(highlight_id) = language
.grammar()
.and_then(|g| g.highlight_id_for_name(highlight_name?))
{
let mut label = CodeLabel::plain(label.to_string(), None);
label.runs.push((
0..label.text.rfind('(').unwrap_or(label.text.len()),
highlight_id,
));
return Some(label);
}
}
_ => {}
}
Some(CodeLabel::plain(label.to_string(), None))
}
async fn label_for_symbol(
&self,
name: &str,
kind: lsp::SymbolKind,
language: &Arc<Language>,
) -> Option<CodeLabel> {
let (text, filter_range, display_range) = match kind {
lsp::SymbolKind::METHOD | lsp::SymbolKind::FUNCTION => {
let text = format!("void {} () {{}}", name);
let filter_range = 0..name.len();
let display_range = 5..5 + name.len();
(text, filter_range, display_range)
}
lsp::SymbolKind::STRUCT => {
let text = format!("struct {} {{}}", name);
let filter_range = 7..7 + name.len();
let display_range = 0..filter_range.end;
(text, filter_range, display_range)
}
lsp::SymbolKind::ENUM => {
let text = format!("enum {} {{}}", name);
let filter_range = 5..5 + name.len();
let display_range = 0..filter_range.end;
(text, filter_range, display_range)
}
lsp::SymbolKind::INTERFACE | lsp::SymbolKind::CLASS => {
let text = format!("class {} {{}}", name);
let filter_range = 6..6 + name.len();
let display_range = 0..filter_range.end;
(text, filter_range, display_range)
}
lsp::SymbolKind::CONSTANT => {
let text = format!("const int {} = 0;", name);
let filter_range = 10..10 + name.len();
let display_range = 0..filter_range.end;
(text, filter_range, display_range)
}
lsp::SymbolKind::MODULE => {
let text = format!("namespace {} {{}}", name);
let filter_range = 10..10 + name.len();
let display_range = 0..filter_range.end;
(text, filter_range, display_range)
}
lsp::SymbolKind::TYPE_PARAMETER => {
let text = format!("typename {} {{}};", name);
let filter_range = 9..9 + name.len();
let display_range = 0..filter_range.end;
(text, filter_range, display_range)
}
_ => return None,
};
Some(CodeLabel {
runs: language.highlight_text(&text.as_str().into(), display_range.clone()),
text: text[display_range].to_string(),
filter_range,
})
}
}
async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServerBinary> {
(|| async move {
let mut last_clangd_dir = None;
let mut entries = fs::read_dir(&container_dir).await?;
while let Some(entry) = entries.next().await {
let entry = entry?;
if entry.file_type().await?.is_dir() {
last_clangd_dir = Some(entry.path());
}
}
let clangd_dir = last_clangd_dir.ok_or_else(|| anyhow!("no cached binary"))?;
let clangd_bin = clangd_dir.join("bin/clangd");
if clangd_bin.exists() {
Ok(LanguageServerBinary {
path: clangd_bin,
arguments: vec![],
})
} else {
Err(anyhow!(
"missing clangd binary in directory {:?}",
clangd_dir
))
}
})()
.await
.log_err()
}
#[cfg(test)]
mod tests {
use gpui::{Context, TestAppContext};
use language::{language_settings::AllLanguageSettings, AutoindentMode, Buffer};
use settings::SettingsStore;
use std::num::NonZeroU32;
#[gpui::test]
async fn test_c_autoindent(cx: &mut TestAppContext) {
cx.update(|cx| {
let test_settings = SettingsStore::test(cx);
cx.set_global(test_settings);
language::init(cx);
cx.update_global::<SettingsStore, _>(|store, cx| {
store.update_user_settings::<AllLanguageSettings>(cx, |s| {
s.defaults.tab_size = NonZeroU32::new(2);
});
});
});
let language = crate::languages::language("c", tree_sitter_c::language(), None).await;
cx.build_model(|cx| {
let mut buffer =
Buffer::new(0, cx.entity_id().as_u64(), "").with_language(language, cx);
buffer.edit([(0..0, "int main() {}")], None, cx);
let ix = buffer.len() - 1;
buffer.edit([(ix..ix, "\n\n")], Some(AutoindentMode::EachLine), cx);
assert_eq!(buffer.text(), "int main() {\n \n}");
let ix = buffer.len() - 2;
buffer.edit([(ix..ix, "if (a)\nb;")], Some(AutoindentMode::EachLine), cx);
assert_eq!(buffer.text(), "int main() {\n if (a)\n b;\n}");
let ix = buffer.len() - 3;
buffer.edit([(ix..ix, "\n.c")], Some(AutoindentMode::EachLine), cx);
assert_eq!(buffer.text(), "int main() {\n if (a)\n b\n .c;\n}");
buffer
});
}
}