use anyhow::Result;use async_trait::async_trait;use gpui::AppContext;use gpui::AsyncAppContext;use language::{ContextProvider, LanguageServerName, LspAdapter, LspAdapterDelegate};use lsp::LanguageServerBinary;use node_runtime::NodeRuntime;use project::lsp_store::language_server_settings;use serde_json::Value; use std::{    any::Any,    borrow::Cow,    ffi::OsString,    path::{Path, PathBuf},    sync::Arc,};use task::{TaskTemplate, TaskTemplates, VariableName};use util::ResultExt; const SERVER_PATH: &str = "node_modules/pyright/langserver.index.js"; fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {    vec![server_path.into(), "--stdio".into()]} pub struct PythonLspAdapter {    node: Arc<dyn NodeRuntime>,} impl PythonLspAdapter {    const SERVER_NAME: &'static str = "pyright";     pub fn new(node: Arc<dyn NodeRuntime>) -> Self {        PythonLspAdapter { node }    }} #[async_trait(?Send)]impl LspAdapter for PythonLspAdapter {    fn name(&self) -> LanguageServerName {        LanguageServerName(Self::SERVER_NAME.into())    }     async fn fetch_latest_server_version(        &self,        _: &dyn LspAdapterDelegate,    ) -> Result<Box<dyn 'static + Any + Send>> {        Ok(Box::new(            self.node                .npm_package_latest_version(Self::SERVER_NAME)                .await?,        ) as Box<_>)    }     async fn fetch_server_binary(        &self,        latest_version: Box<dyn 'static + Send + Any>,        container_dir: PathBuf,        _: &dyn LspAdapterDelegate,    ) -> Result<LanguageServerBinary> {        let latest_version = latest_version.downcast::<String>().unwrap();        let server_path = container_dir.join(SERVER_PATH);        let package_name = Self::SERVER_NAME;         let should_install_language_server = self            .node            .should_install_npm_package(package_name, &server_path, &container_dir, &latest_version)            .await;         if should_install_language_server {            self.node                .npm_install_packages(&container_dir, &[(package_name, latest_version.as_str())])                .await?;        }         Ok(LanguageServerBinary {            path: self.node.binary_path().await?,            env: None,            arguments: server_binary_arguments(&server_path),        })    }     async fn cached_server_binary(        &self,        container_dir: PathBuf,        _: &dyn LspAdapterDelegate,    ) -> Option<LanguageServerBinary> {        get_cached_server_binary(container_dir, &*self.node).await    }     async fn installation_test_binary(        &self,        container_dir: PathBuf,    ) -> Option<LanguageServerBinary> {        get_cached_server_binary(container_dir, &*self.node).await    }     async fn process_completions(&self, items: &mut [lsp::CompletionItem]) {        // Pyright assigns each completion item a `sortText` of the form `XX.YYYY.name`.        // Where `XX` is the sorting category, `YYYY` is based on most recent usage,        // and `name` is the symbol name itself.        //        // Because the symbol name is included, there generally are not ties when        // sorting by the `sortText`, so the symbol's fuzzy match score is not taken        // into account. Here, we remove the symbol name from the sortText in order        // to allow our own fuzzy score to be used to break ties.        //        // see https://github.com/microsoft/pyright/blob/95ef4e103b9b2f129c9320427e51b73ea7cf78bd/packages/pyright-internal/src/languageService/completionProvider.ts#LL2873        for item in items {            let Some(sort_text) = &mut item.sort_text else {                continue;            };            let mut parts = sort_text.split('.');            let Some(first) = parts.next() else { continue };            let Some(second) = parts.next() else { continue };            let Some(_) = parts.next() else { continue };            sort_text.replace_range(first.len() + second.len() + 1.., "");        }    }     async fn label_for_completion(        &self,        item: &lsp::CompletionItem,        language: &Arc<language::Language>,    ) -> Option<language::CodeLabel> {        let label = &item.label;        let grammar = language.grammar()?;        let highlight_id = match item.kind? {            lsp::CompletionItemKind::METHOD => grammar.highlight_id_for_name("function.method")?,            lsp::CompletionItemKind::FUNCTION => grammar.highlight_id_for_name("function")?,            lsp::CompletionItemKind::CLASS => grammar.highlight_id_for_name("type")?,            lsp::CompletionItemKind::CONSTANT => grammar.highlight_id_for_name("constant")?,            _ => return None,        };        Some(language::CodeLabel {            text: label.clone(),            runs: vec![(0..label.len(), highlight_id)],            filter_range: 0..label.len(),        })    }     async fn label_for_symbol(        &self,        name: &str,        kind: lsp::SymbolKind,        language: &Arc<language::Language>,    ) -> Option<language::CodeLabel> {        let (text, filter_range, display_range) = match kind {            lsp::SymbolKind::METHOD | lsp::SymbolKind::FUNCTION => {                let text = format!("def {}():\n", name);                let filter_range = 4..4 + name.len();                let display_range = 0..filter_range.end;                (text, filter_range, display_range)            }            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!("{} = 0", name);                let filter_range = 0..name.len();                let display_range = 0..filter_range.end;                (text, filter_range, display_range)            }            _ => return None,        };         Some(language::CodeLabel {            runs: language.highlight_text(&text.as_str().into(), display_range.clone()),            text: text[display_range].to_string(),            filter_range,        })    }     async fn workspace_configuration(        self: Arc<Self>,        adapter: &Arc<dyn LspAdapterDelegate>,        cx: &mut AsyncAppContext,    ) -> Result<Value> {        cx.update(|cx| {            language_server_settings(adapter.as_ref(), Self::SERVER_NAME, cx)                .and_then(|s| s.settings.clone())                .unwrap_or_default()        })    }} async fn get_cached_server_binary(    container_dir: PathBuf,    node: &dyn NodeRuntime,) -> Option<LanguageServerBinary> {    let server_path = container_dir.join(SERVER_PATH);    if server_path.exists() {        Some(LanguageServerBinary {            path: node.binary_path().await.log_err()?,            env: None,            arguments: server_binary_arguments(&server_path),        })    } else {        log::error!("missing executable in directory {:?}", server_path);        None    }} pub(crate) struct PythonContextProvider; const PYTHON_UNITTEST_TARGET_TASK_VARIABLE: VariableName =    VariableName::Custom(Cow::Borrowed("PYTHON_UNITTEST_TARGET")); impl ContextProvider for PythonContextProvider {    fn build_context(        &self,        variables: &task::TaskVariables,        _location: &project::Location,        _cx: &mut gpui::AppContext,    ) -> Result<task::TaskVariables> {        let python_module_name = python_module_name_from_relative_path(            variables.get(&VariableName::RelativeFile).unwrap_or(""),        );        let unittest_class_name =            variables.get(&VariableName::Custom(Cow::Borrowed("_unittest_class_name")));        let unittest_method_name = variables.get(&VariableName::Custom(Cow::Borrowed(            "_unittest_method_name",        )));         let unittest_target_str = match (unittest_class_name, unittest_method_name) {            (Some(class_name), Some(method_name)) => {                format!("{}.{}.{}", python_module_name, class_name, method_name)            }            (Some(class_name), None) => format!("{}.{}", python_module_name, class_name),            (None, None) => python_module_name,            (None, Some(_)) => return Ok(task::TaskVariables::default()), // should never happen, a TestCase class is the unit of testing        };         let unittest_target = (            PYTHON_UNITTEST_TARGET_TASK_VARIABLE.clone(),            unittest_target_str,        );         Ok(task::TaskVariables::from_iter([unittest_target]))    }     fn associated_tasks(        &self,        _: Option<Arc<dyn language::File>>,        _: &AppContext,    ) -> Option<TaskTemplates> {        Some(TaskTemplates(vec![            TaskTemplate {                label: "execute selection".to_owned(),                command: "python3".to_owned(),                args: vec!["-c".to_owned(), VariableName::SelectedText.template_value()],                ..TaskTemplate::default()            },            TaskTemplate {                label: format!("run '{}'", VariableName::File.template_value()),                command: "python3".to_owned(),                args: vec![VariableName::File.template_value()],                ..TaskTemplate::default()            },            TaskTemplate {                label: format!("unittest '{}'", VariableName::File.template_value()),                command: "python3".to_owned(),                args: vec![                    "-m".to_owned(),                    "unittest".to_owned(),                    VariableName::File.template_value(),                ],                ..TaskTemplate::default()            },            TaskTemplate {                label: "unittest $ZED_CUSTOM_PYTHON_UNITTEST_TARGET".to_owned(),                command: "python3".to_owned(),                args: vec![                    "-m".to_owned(),                    "unittest".to_owned(),                    "$ZED_CUSTOM_PYTHON_UNITTEST_TARGET".to_owned(),                ],                tags: vec![                    "python-unittest-class".to_owned(),                    "python-unittest-method".to_owned(),                ],                ..TaskTemplate::default()            },        ]))    }} fn python_module_name_from_relative_path(relative_path: &str) -> String {    let path_with_dots = relative_path.replace('/', ".");    path_with_dots        .strip_suffix(".py")        .unwrap_or(&path_with_dots)        .to_string()} #[cfg(test)]mod tests {    use gpui::{BorrowAppContext, Context, ModelContext, TestAppContext};    use language::{language_settings::AllLanguageSettings, AutoindentMode, Buffer};    use settings::SettingsStore;    use std::num::NonZeroU32;     #[gpui::test]    async fn test_python_autoindent(cx: &mut TestAppContext) {        cx.executor().set_block_on_ticks(usize::MAX..=usize::MAX);        let language = crate::language("python", tree_sitter_python::language());        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);                });            });        });         cx.new_model(|cx| {            let mut buffer = Buffer::local("", cx).with_language(language, cx);            let append = |buffer: &mut Buffer, text: &str, cx: &mut ModelContext<Buffer>| {                let ix = buffer.len();                buffer.edit([(ix..ix, text)], Some(AutoindentMode::EachLine), cx);            };             // indent after "def():"            append(&mut buffer, "def a():\n", cx);            assert_eq!(buffer.text(), "def a():\n  ");             // preserve indent after blank line            append(&mut buffer, "\n  ", cx);            assert_eq!(buffer.text(), "def a():\n  \n  ");             // indent after "if"            append(&mut buffer, "if a:\n  ", cx);            assert_eq!(buffer.text(), "def a():\n  \n  if a:\n    ");             // preserve indent after statement            append(&mut buffer, "b()\n", cx);            assert_eq!(buffer.text(), "def a():\n  \n  if a:\n    b()\n    ");             // preserve indent after statement            append(&mut buffer, "else", cx);            assert_eq!(buffer.text(), "def a():\n  \n  if a:\n    b()\n    else");             // dedent "else""            append(&mut buffer, ":", cx);            assert_eq!(buffer.text(), "def a():\n  \n  if a:\n    b()\n  else:");             // indent lines after else            append(&mut buffer, "\n", cx);            assert_eq!(                buffer.text(),                "def a():\n  \n  if a:\n    b()\n  else:\n    "            );             // indent after an open paren. the closing  paren is not indented            // because there is another token before it on the same line.            append(&mut buffer, "foo(\n1)", cx);            assert_eq!(                buffer.text(),                "def a():\n  \n  if a:\n    b()\n  else:\n    foo(\n      1)"            );             // dedent the closing paren if it is shifted to the beginning of the line            let argument_ix = buffer.text().find('1').unwrap();            buffer.edit(                [(argument_ix..argument_ix + 1, "")],                Some(AutoindentMode::EachLine),                cx,            );            assert_eq!(                buffer.text(),                "def a():\n  \n  if a:\n    b()\n  else:\n    foo(\n    )"            );             // preserve indent after the close paren            append(&mut buffer, "\n", cx);            assert_eq!(                buffer.text(),                "def a():\n  \n  if a:\n    b()\n  else:\n    foo(\n    )\n    "            );             // manually outdent the last line            let end_whitespace_ix = buffer.len() - 4;            buffer.edit(                [(end_whitespace_ix..buffer.len(), "")],                Some(AutoindentMode::EachLine),                cx,            );            assert_eq!(                buffer.text(),                "def a():\n  \n  if a:\n    b()\n  else:\n    foo(\n    )\n"            );             // preserve the newly reduced indentation on the next newline            append(&mut buffer, "\n", cx);            assert_eq!(                buffer.text(),                "def a():\n  \n  if a:\n    b()\n  else:\n    foo(\n    )\n\n"            );             // reset to a simple if statement            buffer.edit([(0..buffer.len(), "if a:\n  b(\n  )")], None, cx);             // dedent "else" on the line after a closing paren            append(&mut buffer, "\n  else:\n", cx);            assert_eq!(buffer.text(), "if a:\n  b(\n  )\nelse:\n  ");             buffer        });    }}