use anyhow::{anyhow, Context as _, Result};use async_compression::futures::bufread::GzipDecoder;use async_trait::async_trait;use collections::HashMap;use futures::{io::BufReader, StreamExt};use gpui::{App, AsyncApp, SharedString, Task};use http_client::github::AssetKind;use http_client::github::{latest_github_release, GitHubLspBinaryVersion};pub use language::*;use lsp::LanguageServerBinary;use regex::Regex;use smol::fs::{self};use std::fmt::Display;use std::{    any::Any,    borrow::Cow,    path::{Path, PathBuf},    sync::{Arc, LazyLock},};use task::{TaskTemplate, TaskTemplates, TaskVariables, VariableName};use util::{fs::remove_matching, maybe, ResultExt}; use crate::language_settings::language_settings; pub struct RustLspAdapter; #[cfg(target_os = "macos")]impl RustLspAdapter {    const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;    const ARCH_SERVER_NAME: &str = "apple-darwin";} #[cfg(target_os = "linux")]impl RustLspAdapter {    const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;    const ARCH_SERVER_NAME: &str = "unknown-linux-gnu";} #[cfg(target_os = "freebsd")]impl RustLspAdapter {    const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;    const ARCH_SERVER_NAME: &str = "unknown-freebsd";} #[cfg(target_os = "windows")]impl RustLspAdapter {    const GITHUB_ASSET_KIND: AssetKind = AssetKind::Zip;    const ARCH_SERVER_NAME: &str = "pc-windows-msvc";} impl RustLspAdapter {    const SERVER_NAME: LanguageServerName = LanguageServerName::new_static("rust-analyzer");     fn build_asset_name() -> String {        let extension = match Self::GITHUB_ASSET_KIND {            AssetKind::TarGz => "tar.gz",            AssetKind::Gz => "gz",            AssetKind::Zip => "zip",        };         format!(            "{}-{}-{}.{}",            Self::SERVER_NAME,            std::env::consts::ARCH,            Self::ARCH_SERVER_NAME,            extension        )    }} pub(crate) struct CargoManifestProvider; impl ManifestProvider for CargoManifestProvider {    fn name(&self) -> ManifestName {        SharedString::new_static("Cargo.toml").into()    }     fn search(        &self,        ManifestQuery {            path,            depth,            delegate,        }: ManifestQuery,    ) -> Option<Arc<Path>> {        let mut outermost_cargo_toml = None;        for path in path.ancestors().take(depth) {            let p = path.join("Cargo.toml");            if delegate.exists(&p, Some(false)) {                outermost_cargo_toml = Some(Arc::from(path));            }        }         outermost_cargo_toml    }} #[async_trait(?Send)]impl LspAdapter for RustLspAdapter {    fn name(&self) -> LanguageServerName {        Self::SERVER_NAME.clone()    }     fn manifest_name(&self) -> Option<ManifestName> {        Some(SharedString::new_static("Cargo.toml").into())    }     async fn check_if_user_installed(        &self,        delegate: &dyn LspAdapterDelegate,        _: Arc<dyn LanguageToolchainStore>,        _: &AsyncApp,    ) -> Option<LanguageServerBinary> {        let path = delegate.which("rust-analyzer".as_ref()).await?;        let env = delegate.shell_env().await;         // It is surprisingly common for ~/.cargo/bin/rust-analyzer to be a symlink to        // /usr/bin/rust-analyzer that fails when you run it; so we need to test it.        log::info!("found rust-analyzer in PATH. trying to run `rust-analyzer --help`");        let result = delegate            .try_exec(LanguageServerBinary {                path: path.clone(),                arguments: vec!["--help".into()],                env: Some(env.clone()),            })            .await;        if let Err(err) = result {            log::error!(                "failed to run rust-analyzer after detecting it in PATH: binary: {:?}: {}",                path,                err            );            return None;        }         Some(LanguageServerBinary {            path,            env: Some(env),            arguments: vec![],        })    }     async fn fetch_latest_server_version(        &self,        delegate: &dyn LspAdapterDelegate,    ) -> Result<Box<dyn 'static + Send + Any>> {        let release = latest_github_release(            "rust-lang/rust-analyzer",            true,            false,            delegate.http_client(),        )        .await?;        let asset_name = Self::build_asset_name();         let asset = release            .assets            .iter()            .find(|asset| asset.name == asset_name)            .with_context(|| format!("no asset found matching `{asset_name:?}`"))?;        Ok(Box::new(GitHubLspBinaryVersion {            name: release.tag_name,            url: asset.browser_download_url.clone(),        }))    }     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 destination_path = container_dir.join(format!("rust-analyzer-{}", version.name));        let server_path = match Self::GITHUB_ASSET_KIND {            AssetKind::TarGz | AssetKind::Gz => destination_path.clone(), // Tar and gzip extract in place.            AssetKind::Zip => destination_path.clone().join("rust-analyzer.exe"), // zip contains a .exe        };         if fs::metadata(&server_path).await.is_err() {            remove_matching(&container_dir, |entry| entry != destination_path).await;             let mut response = delegate                .http_client()                .get(&version.url, Default::default(), true)                .await                .with_context(|| format!("downloading release from {}", version.url))?;            match Self::GITHUB_ASSET_KIND {                AssetKind::TarGz => {                    let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));                    let archive = async_tar::Archive::new(decompressed_bytes);                    archive.unpack(&destination_path).await.with_context(|| {                        format!("extracting {} to {:?}", version.url, destination_path)                    })?;                }                AssetKind::Gz => {                    let mut decompressed_bytes =                        GzipDecoder::new(BufReader::new(response.body_mut()));                    let mut file =                        fs::File::create(&destination_path).await.with_context(|| {                            format!(                                "creating a file {:?} for a download from {}",                                destination_path, version.url,                            )                        })?;                    futures::io::copy(&mut decompressed_bytes, &mut file)                        .await                        .with_context(|| {                            format!("extracting {} to {:?}", version.url, destination_path)                        })?;                }                AssetKind::Zip => {                    node_runtime::extract_zip(                        &destination_path,                        BufReader::new(response.body_mut()),                    )                    .await                    .with_context(|| {                        format!("unzipping {} to {:?}", version.url, destination_path)                    })?;                }            };             // todo("windows")            #[cfg(not(windows))]            {                fs::set_permissions(                    &server_path,                    <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),                )                .await?;            }        }         Ok(LanguageServerBinary {            path: server_path,            env: None,            arguments: Default::default(),        })    }     async fn cached_server_binary(        &self,        container_dir: PathBuf,        _: &dyn LspAdapterDelegate,    ) -> Option<LanguageServerBinary> {        get_cached_server_binary(container_dir).await    }     fn disk_based_diagnostic_sources(&self) -> Vec<String> {        vec!["rustc".into()]    }     fn disk_based_diagnostics_progress_token(&self) -> Option<String> {        Some("rust-analyzer/flycheck".into())    }     fn process_diagnostics(        &self,        params: &mut lsp::PublishDiagnosticsParams,        _: LanguageServerId,        _: Option<&'_ Buffer>,    ) {        static REGEX: LazyLock<Regex> =            LazyLock::new(|| Regex::new(r"(?m)`([^`]+)\n`$").expect("Failed to create REGEX"));         for diagnostic in &mut params.diagnostics {            for message in diagnostic                .related_information                .iter_mut()                .flatten()                .map(|info| &mut info.message)                .chain([&mut diagnostic.message])            {                if let Cow::Owned(sanitized) = REGEX.replace_all(message, "`$1`") {                    *message = sanitized;                }            }        }    }     async fn label_for_completion(        &self,        completion: &lsp::CompletionItem,        language: &Arc<Language>,    ) -> Option<CodeLabel> {        let detail = completion            .label_details            .as_ref()            .and_then(|detail| detail.detail.as_ref())            .or(completion.detail.as_ref())            .map(|detail| detail.trim());        let function_signature = completion            .label_details            .as_ref()            .and_then(|detail| detail.description.as_deref())            .or(completion.detail.as_deref());        match (detail, completion.kind) {            (Some(detail), Some(lsp::CompletionItemKind::FIELD)) => {                let name = &completion.label;                let text = format!("{name}: {detail}");                let prefix = "struct S { ";                let source = Rope::from(format!("{prefix}{text} }}"));                let runs =                    language.highlight_text(&source, prefix.len()..prefix.len() + text.len());                return Some(CodeLabel {                    text,                    runs,                    filter_range: 0..name.len(),                });            }            (                Some(detail),                Some(lsp::CompletionItemKind::CONSTANT | lsp::CompletionItemKind::VARIABLE),            ) if completion.insert_text_format != Some(lsp::InsertTextFormat::SNIPPET) => {                let name = &completion.label;                let text = format!(                    "{}: {}",                    name,                    completion.detail.as_deref().unwrap_or(detail)                );                let prefix = "let ";                let source = Rope::from(format!("{prefix}{text} = ();"));                let runs =                    language.highlight_text(&source, prefix.len()..prefix.len() + text.len());                return Some(CodeLabel {                    text,                    runs,                    filter_range: 0..name.len(),                });            }            (                Some(detail),                Some(lsp::CompletionItemKind::FUNCTION | lsp::CompletionItemKind::METHOD),            ) => {                static REGEX: LazyLock<Regex> = LazyLock::new(|| Regex::new("\\(…?\\)").unwrap());                const FUNCTION_PREFIXES: [&str; 6] = [                    "async fn",                    "async unsafe fn",                    "const fn",                    "const unsafe fn",                    "unsafe fn",                    "fn",                ];                // Is it function `async`?                let fn_keyword = FUNCTION_PREFIXES.iter().find_map(|prefix| {                    function_signature.as_ref().and_then(|signature| {                        signature                            .strip_prefix(*prefix)                            .map(|suffix| (*prefix, suffix))                    })                });                // fn keyword should be followed by opening parenthesis.                if let Some((prefix, suffix)) = fn_keyword {                    let mut text = REGEX.replace(&completion.label, suffix).to_string();                    let source = Rope::from(format!("{prefix} {text} {{}}"));                    let run_start = prefix.len() + 1;                    let runs = language.highlight_text(&source, run_start..run_start + text.len());                    if detail.starts_with("(") {                        text.push(' ');                        text.push_str(&detail);                    }                     return Some(CodeLabel {                        filter_range: 0..completion.label.find('(').unwrap_or(text.len()),                        text,                        runs,                    });                } else if completion                    .detail                    .as_ref()                    .map_or(false, |detail| detail.starts_with("macro_rules! "))                {                    let source = Rope::from(completion.label.as_str());                    let runs = language.highlight_text(&source, 0..completion.label.len());                     return Some(CodeLabel {                        filter_range: 0..completion.label.len(),                        text: completion.label.clone(),                        runs,                    });                }            }            (_, Some(kind)) => {                let highlight_name = match kind {                    lsp::CompletionItemKind::STRUCT                    | lsp::CompletionItemKind::INTERFACE                    | 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,                };                 let mut label = completion.label.clone();                if let Some(detail) = detail.filter(|detail| detail.starts_with("(")) {                    label.push(' ');                    label.push_str(detail);                }                let mut label = CodeLabel::plain(label, None);                if let Some(highlight_name) = highlight_name {                    let highlight_id = language.grammar()?.highlight_id_for_name(highlight_name)?;                    label.runs.push((                        0..label.text.rfind('(').unwrap_or(completion.label.len()),                        highlight_id,                    ));                }                 return Some(label);            }            _ => {}        }        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!("fn {} () {{}}", name);                let filter_range = 3..3 + name.len();                let display_range = 0..filter_range.end;                (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 => {                let text = format!("trait {} {{}}", 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 {}: () = ();", name);                let filter_range = 6..6 + name.len();                let display_range = 0..filter_range.end;                (text, filter_range, display_range)            }            lsp::SymbolKind::MODULE => {                let text = format!("mod {} {{}}", name);                let filter_range = 4..4 + name.len();                let display_range = 0..filter_range.end;                (text, filter_range, display_range)            }            lsp::SymbolKind::TYPE_PARAMETER => {                let text = format!("type {} {{}}", name);                let filter_range = 5..5 + 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,        })    }} pub(crate) struct RustContextProvider; const RUST_PACKAGE_TASK_VARIABLE: VariableName =    VariableName::Custom(Cow::Borrowed("RUST_PACKAGE")); /// The bin name corresponding to the current file in Cargo.tomlconst RUST_BIN_NAME_TASK_VARIABLE: VariableName =    VariableName::Custom(Cow::Borrowed("RUST_BIN_NAME")); /// The bin kind (bin/example) corresponding to the current file in Cargo.tomlconst RUST_BIN_KIND_TASK_VARIABLE: VariableName =    VariableName::Custom(Cow::Borrowed("RUST_BIN_KIND")); const RUST_TEST_FRAGMENT_TASK_VARIABLE: VariableName =    VariableName::Custom(Cow::Borrowed("RUST_TEST_FRAGMENT")); const RUST_DOC_TEST_NAME_TASK_VARIABLE: VariableName =    VariableName::Custom(Cow::Borrowed("RUST_DOC_TEST_NAME")); const RUST_TEST_NAME_TASK_VARIABLE: VariableName =    VariableName::Custom(Cow::Borrowed("RUST_TEST_NAME")); impl ContextProvider for RustContextProvider {

Lines 1–500 of 1315. Load more