use anyhow::{Context as _, Result};use async_trait::async_trait;use collections::HashMap;use futures::StreamExt;use gpui::{App, AppContext, AsyncApp, SharedString, Task};use http_client::github::AssetKind;use http_client::github::{GitHubLspBinaryVersion, latest_github_release};use http_client::github_download::{GithubBinaryMetadata, download_server_binary};pub use language::*;use lsp::{InitializeParams, LanguageServerBinary};use project::lsp_store::rust_analyzer_ext::CARGO_DIAGNOSTICS_SOURCE_NAME;use project::project_settings::ProjectSettings;use regex::Regex;use serde_json::json;use settings::Settings as _;use smol::fs::{self};use std::fmt::Display;use std::ops::Range;use std::{    borrow::Cow,    path::{Path, PathBuf},    sync::{Arc, LazyLock},};use task::{TaskTemplate, TaskTemplates, TaskVariables, VariableName};use util::fs::{make_file_executable, remove_matching};use util::merge_json_value_into;use util::rel_path::RelPath;use util::{ResultExt, maybe}; 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";} #[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";} const SERVER_NAME: LanguageServerName = LanguageServerName::new_static("rust-analyzer"); #[cfg(target_os = "linux")]enum LibcType {    Gnu,    Musl,} impl RustLspAdapter {    #[cfg(target_os = "linux")]    async fn determine_libc_type() -> LibcType {        use futures::pin_mut;         async fn from_ldd_version() -> Option<LibcType> {            use util::command::new_smol_command;             let ldd_output = new_smol_command("ldd")                .arg("--version")                .output()                .await                .ok()?;            let ldd_version = String::from_utf8_lossy(&ldd_output.stdout);             if ldd_version.contains("GNU libc") || ldd_version.contains("GLIBC") {                Some(LibcType::Gnu)            } else if ldd_version.contains("musl") {                Some(LibcType::Musl)            } else {                None            }        }         if let Some(libc_type) = from_ldd_version().await {            return libc_type;        }         let Ok(dir_entries) = smol::fs::read_dir("/lib").await else {            // defaulting to gnu because nix doesn't have /lib files due to not following FHS            return LibcType::Gnu;        };        let dir_entries = dir_entries.filter_map(async move |e| e.ok());        pin_mut!(dir_entries);         let mut has_musl = false;        let mut has_gnu = false;         while let Some(entry) = dir_entries.next().await {            let file_name = entry.file_name();            let file_name = file_name.to_string_lossy();            if file_name.starts_with("ld-musl-") {                has_musl = true;            } else if file_name.starts_with("ld-linux-") {                has_gnu = true;            }        }         match (has_musl, has_gnu) {            (true, _) => LibcType::Musl,            (_, true) => LibcType::Gnu,            _ => LibcType::Gnu,        }    }     #[cfg(target_os = "linux")]    async fn build_arch_server_name_linux() -> String {        let libc = match Self::determine_libc_type().await {            LibcType::Musl => "musl",            LibcType::Gnu => "gnu",        };         format!("{}-{}", Self::ARCH_SERVER_NAME, libc)    }     async fn build_asset_name() -> String {        let extension = match Self::GITHUB_ASSET_KIND {            AssetKind::TarGz => "tar.gz",            AssetKind::Gz => "gz",            AssetKind::Zip => "zip",        };         #[cfg(target_os = "linux")]        let arch_server_name = Self::build_arch_server_name_linux().await;        #[cfg(not(target_os = "linux"))]        let arch_server_name = Self::ARCH_SERVER_NAME.to_string();         format!(            "{}-{}-{}.{}",            SERVER_NAME,            std::env::consts::ARCH,            &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<RelPath>> {        let mut outermost_cargo_toml = None;        for path in path.ancestors().take(depth) {            let p = path.join(RelPath::unix("Cargo.toml").unwrap());            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 {        SERVER_NAME    }     fn disk_based_diagnostic_sources(&self) -> Vec<String> {        vec![CARGO_DIAGNOSTICS_SOURCE_NAME.to_owned()]    }     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;                }            }        }    }     fn diagnostic_message_to_markdown(&self, message: &str) -> Option<String> {        static REGEX: LazyLock<Regex> =            LazyLock::new(|| Regex::new(r"(?m)\n *").expect("Failed to create REGEX"));        Some(REGEX.replace_all(message, "\n\n").to_string())    }     async fn label_for_completion(        &self,        completion: &lsp::CompletionItem,        language: &Arc<Language>,    ) -> Option<CodeLabel> {        // rust-analyzer calls these detail left and detail right in terms of where it expects things to be rendered        // this usually contains signatures of the thing to be completed        let detail_right = completion            .label_details            .as_ref()            .and_then(|detail| detail.description.as_ref())            .or(completion.detail.as_ref())            .map(|detail| detail.trim());        // this tends to contain alias and import information        let detail_left = completion            .label_details            .as_ref()            .and_then(|detail| detail.detail.as_deref());        let mk_label = |text: String, filter_range: &dyn Fn() -> Range<usize>, runs| {            let filter_range = completion                .filter_text                .as_deref()                .and_then(|filter| text.find(filter).map(|ix| ix..ix + filter.len()))                .or_else(|| {                    text.find(&completion.label)                        .map(|ix| ix..ix + completion.label.len())                })                .unwrap_or_else(filter_range);             CodeLabel::new(text, filter_range, runs)        };        let mut label = match (detail_right, completion.kind) {            (Some(signature), Some(lsp::CompletionItemKind::FIELD)) => {                let name = &completion.label;                let text = format!("{name}: {signature}");                let prefix = "struct S { ";                let source = Rope::from_iter([prefix, &text, " }"]);                let runs =                    language.highlight_text(&source, prefix.len()..prefix.len() + text.len());                mk_label(text, &|| 0..completion.label.len(), runs)            }            (                Some(signature),                Some(lsp::CompletionItemKind::CONSTANT | lsp::CompletionItemKind::VARIABLE),            ) if completion.insert_text_format != Some(lsp::InsertTextFormat::SNIPPET) => {                let name = &completion.label;                let text = format!("{name}: {signature}",);                let prefix = "let ";                let source = Rope::from_iter([prefix, &text, " = ();"]);                let runs =                    language.highlight_text(&source, prefix.len()..prefix.len() + text.len());                mk_label(text, &|| 0..completion.label.len(), runs)            }            (                function_signature,                Some(lsp::CompletionItemKind::FUNCTION | lsp::CompletionItemKind::METHOD),            ) => {                const FUNCTION_PREFIXES: [&str; 6] = [                    "async fn",                    "async unsafe fn",                    "const fn",                    "const unsafe fn",                    "unsafe fn",                    "fn",                ];                let fn_prefixed = FUNCTION_PREFIXES.iter().find_map(|&prefix| {                    function_signature?                        .strip_prefix(prefix)                        .map(|suffix| (prefix, suffix))                });                let label = if let Some(label) = completion                    .label                    .strip_suffix("(…)")                    .or_else(|| completion.label.strip_suffix("()"))                {                    label                } else {                    &completion.label                };                 static FULL_SIGNATURE_REGEX: LazyLock<Regex> =                    LazyLock::new(|| Regex::new(r"fn (.?+)\(").expect("Failed to create REGEX"));                if let Some((function_signature, match_)) = function_signature                    .filter(|it| it.contains(&label))                    .and_then(|it| Some((it, FULL_SIGNATURE_REGEX.find(it)?)))                {                    let source = Rope::from(function_signature);                    let runs = language.highlight_text(&source, 0..function_signature.len());                    mk_label(                        function_signature.to_owned(),                        &|| match_.range().start - 3..match_.range().end - 1,                        runs,                    )                } else if let Some((prefix, suffix)) = fn_prefixed {                    let text = format!("{label}{suffix}");                    let source = Rope::from_iter([prefix, " ", &text, " {}"]);                    let run_start = prefix.len() + 1;                    let runs = language.highlight_text(&source, run_start..run_start + text.len());                    mk_label(text, &|| 0..label.len(), runs)                } else if completion                    .detail                    .as_ref()                    .is_some_and(|detail| detail.starts_with("macro_rules! "))                {                    let text = completion.label.clone();                    let len = text.len();                    let source = Rope::from(text.as_str());                    let runs = language.highlight_text(&source, 0..len);                    mk_label(text, &|| 0..completion.label.len(), runs)                } else if detail_left.is_none() {                    return None;                } else {                    mk_label(                        completion.label.clone(),                        &|| 0..completion.label.len(),                        vec![],                    )                }            }            (_, kind) => {                let highlight_name = kind.and_then(|kind| 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 label = completion.label.clone();                let mut runs = vec![];                if let Some(highlight_name) = highlight_name {                    let highlight_id = language.grammar()?.highlight_id_for_name(highlight_name)?;                    runs.push((                        0..label.rfind('(').unwrap_or(completion.label.len()),                        highlight_id,                    ));                } else if detail_left.is_none() {                    return None;                }                 mk_label(label, &|| 0..completion.label.len(), runs)            }        };         if let Some(detail_left) = detail_left {            label.text.push(' ');            if !detail_left.starts_with('(') {                label.text.push('(');            }            label.text.push_str(detail_left);            if !detail_left.ends_with(')') {                label.text.push(')');            }        }        Some(label)    }     async fn label_for_symbol(        &self,        name: &str,        kind: lsp::SymbolKind,        language: &Arc<Language>,    ) -> Option<CodeLabel> {        let (prefix, suffix) = match kind {            lsp::SymbolKind::METHOD | lsp::SymbolKind::FUNCTION => ("fn ", " () {}"),            lsp::SymbolKind::STRUCT => ("struct ", " {}"),            lsp::SymbolKind::ENUM => ("enum ", " {}"),            lsp::SymbolKind::INTERFACE => ("trait ", " {}"),            lsp::SymbolKind::CONSTANT => ("const ", ": () = ();"),            lsp::SymbolKind::MODULE => ("mod ", " {}"),            lsp::SymbolKind::TYPE_PARAMETER => ("type ", " {}"),            _ => return None,        };         let filter_range = prefix.len()..prefix.len() + name.len();        let display_range = 0..filter_range.end;        Some(CodeLabel::new(            format!("{prefix}{name}"),            filter_range,            language.highlight_text(&Rope::from_iter([prefix, name, suffix]), display_range),        ))    }     fn prepare_initialize_params(        &self,        mut original: InitializeParams,        cx: &App,    ) -> Result<InitializeParams> {        let enable_lsp_tasks = ProjectSettings::get_global(cx)            .lsp            .get(&SERVER_NAME)            .is_some_and(|s| s.enable_lsp_tasks);        if enable_lsp_tasks {            let experimental = json!({                "runnables": {                    "kinds": [ "cargo", "shell" ],                },            });            if let Some(original_experimental) = &mut original.capabilities.experimental {                merge_json_value_into(experimental, original_experimental);            } else {                original.capabilities.experimental = Some(experimental);            }        }         Ok(original)    }} impl LspInstaller for RustLspAdapter {    type BinaryVersion = GitHubLspBinaryVersion;    async fn check_if_user_installed(        &self,        delegate: &dyn LspAdapterDelegate,        _: Option<Toolchain>,        _: &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::debug!("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::debug!(                "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,        pre_release: bool,        _: &mut AsyncApp,    ) -> Result<GitHubLspBinaryVersion> {        let release = latest_github_release(            "rust-lang/rust-analyzer",            true,            pre_release,            delegate.http_client(),        )        .await?;        let asset_name = Self::build_asset_name().await;        let asset = release            .assets            .into_iter()            .find(|asset| asset.name == asset_name)            .with_context(|| format!("no asset found matching `{asset_name:?}`"))?;        Ok(GitHubLspBinaryVersion {            name: release.tag_name,            url: asset.browser_download_url,            digest: asset.digest,        })    }     async fn fetch_server_binary(

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