use crate::{    ExtensionLibraryKind, ExtensionManifest, GrammarManifestEntry, build_debug_adapter_schema_path,    parse_wasm_extension_version,};use ::fs::Fs;use anyhow::{Context as _, Result, bail};use futures::{StreamExt, io};use heck::ToSnakeCase;use http_client::{self, AsyncBody, HttpClient};use language::LanguageConfig;use serde::Deserialize;use std::{    env, fs, mem,    path::{Path, PathBuf},    str::FromStr,    sync::Arc,};use util::command::Stdio;use wasm_encoder::{ComponentSectionId, Encode as _, RawSection, Section as _};use wasmparser::Parser; /// Currently, we compile with Rust's `wasm32-wasip2` target, which works with WASI `preview2` and the component model.const RUST_TARGET: &str = "wasm32-wasip2"; /// Compiling Tree-sitter parsers from C to WASM requires Clang 17, and a WASM build of libc/// and clang's runtime library. The `wasi-sdk` provides these binaries.////// Once Clang 17 and its wasm target are available via system package managers, we won't need/// to download this.const WASI_SDK_URL: &str = "https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-25/";const WASI_SDK_ASSET_NAME: Option<&str> = if cfg!(all(target_os = "macos", target_arch = "x86_64")){    Some("wasi-sdk-25.0-x86_64-macos.tar.gz")} else if cfg!(all(target_os = "macos", target_arch = "aarch64")) {    Some("wasi-sdk-25.0-arm64-macos.tar.gz")} else if cfg!(all(target_os = "linux", target_arch = "x86_64")) {    Some("wasi-sdk-25.0-x86_64-linux.tar.gz")} else if cfg!(all(target_os = "linux", target_arch = "aarch64")) {    Some("wasi-sdk-25.0-arm64-linux.tar.gz")} else if cfg!(all(target_os = "freebsd", target_arch = "x86_64")) {    Some("wasi-sdk-25.0-x86_64-linux.tar.gz")} else if cfg!(all(target_os = "freebsd", target_arch = "aarch64")) {    Some("wasi-sdk-25.0-arm64-linux.tar.gz")} else if cfg!(all(target_os = "windows", target_arch = "x86_64")) {    Some("wasi-sdk-25.0-x86_64-windows.tar.gz")} else {    None}; pub struct ExtensionBuilder {    cache_dir: PathBuf,    pub http: Arc<dyn HttpClient>,} pub struct CompileExtensionOptions {    pub release: bool,} impl CompileExtensionOptions {    pub const fn dev() -> Self {        Self { release: false }    }} #[derive(Deserialize)]struct CargoToml {    package: CargoTomlPackage,} #[derive(Deserialize)]struct CargoTomlPackage {    name: String,} impl ExtensionBuilder {    pub fn new(http_client: Arc<dyn HttpClient>, cache_dir: PathBuf) -> Self {        Self {            cache_dir,            http: http_client,        }    }     pub async fn compile_extension(        &self,        extension_dir: &Path,        extension_manifest: &mut ExtensionManifest,        options: CompileExtensionOptions,        fs: Arc<dyn Fs>,    ) -> Result<()> {        populate_defaults(extension_manifest, extension_dir, fs).await?;         if extension_dir.is_relative() {            bail!(                "extension dir {} is not an absolute path",                extension_dir.display()            );        }         fs::create_dir_all(&self.cache_dir).context("failed to create cache dir")?;         if extension_manifest.lib.kind == Some(ExtensionLibraryKind::Rust) {            log::info!("compiling Rust extension {}", extension_dir.display());            self.compile_rust_extension(extension_dir, extension_manifest, options)                .await                .context("failed to compile Rust extension")?;            log::info!("compiled Rust extension {}", extension_dir.display());        }         for (debug_adapter_name, meta) in &mut extension_manifest.debug_adapters {            let debug_adapter_schema_path =                extension_dir.join(build_debug_adapter_schema_path(debug_adapter_name, meta));             let debug_adapter_schema = fs::read_to_string(&debug_adapter_schema_path)                .with_context(|| {                    format!("failed to read debug adapter schema for `{debug_adapter_name}` from `{debug_adapter_schema_path:?}`")                })?;            _ = serde_json::Value::from_str(&debug_adapter_schema).with_context(|| {                format!("Debug adapter schema for `{debug_adapter_name}` (path: `{debug_adapter_schema_path:?}`) is not a valid JSON")            })?;        }        for (grammar_name, grammar_metadata) in &extension_manifest.grammars {            let snake_cased_grammar_name = grammar_name.to_snake_case();            if grammar_name.as_ref() != snake_cased_grammar_name.as_str() {                bail!(                    "grammar name '{grammar_name}' must be written in snake_case: {snake_cased_grammar_name}"                );            }             log::info!(                "compiling grammar {grammar_name} for extension {}",                extension_dir.display()            );            self.compile_grammar(extension_dir, grammar_name.as_ref(), grammar_metadata)                .await                .with_context(|| format!("failed to compile grammar '{grammar_name}'"))?;            log::info!(                "compiled grammar {grammar_name} for extension {}",                extension_dir.display()            );        }         log::info!("finished compiling extension {}", extension_dir.display());        Ok(())    }     async fn compile_rust_extension(        &self,        extension_dir: &Path,        manifest: &mut ExtensionManifest,        options: CompileExtensionOptions,    ) -> anyhow::Result<()> {        self.install_rust_wasm_target_if_needed().await?;         let cargo_toml_content = fs::read_to_string(extension_dir.join("Cargo.toml"))?;        let cargo_toml: CargoToml = toml::from_str(&cargo_toml_content)?;         log::info!(            "compiling Rust crate for extension {}",            extension_dir.display()        );        let output = util::command::new_command("cargo")            .args(["build", "--target", RUST_TARGET])            .args(options.release.then_some("--release"))            .arg("--target-dir")            .arg(extension_dir.join("target"))            // WASI builds do not work with sccache and just stuck, so disable it.            .env("RUSTC_WRAPPER", "")            .current_dir(extension_dir)            .output()            .await            .context("failed to run `cargo`")?;        if !output.status.success() {            bail!(                "failed to build extension {}",                String::from_utf8_lossy(&output.stderr)            );        }         log::info!(            "compiled Rust crate for extension {}",            extension_dir.display()        );         let mut wasm_path = PathBuf::from(extension_dir);        wasm_path.extend([            "target",            RUST_TARGET,            if options.release { "release" } else { "debug" },            &cargo_toml                .package                .name                // The wasm32-wasip2 target normalizes `-` in package names to `_` in the resulting `.wasm` file.                .replace('-', "_"),        ]);        wasm_path.set_extension("wasm");         log::info!(            "encoding wasm component for extension {}",            extension_dir.display()        );         let component_bytes = fs::read(&wasm_path)            .with_context(|| format!("failed to read output module `{}`", wasm_path.display()))?;         let component_bytes = self            .strip_custom_sections(&component_bytes)            .context("failed to strip debug sections from wasm component")?;         let wasm_extension_api_version =            parse_wasm_extension_version(&manifest.id, &component_bytes)                .context("compiled wasm did not contain a valid zed extension api version")?;        manifest.lib.version = Some(wasm_extension_api_version);         let extension_file = extension_dir.join("extension.wasm");        fs::write(extension_file.clone(), &component_bytes)            .context("failed to write extension.wasm")?;         log::info!(            "extension {} written to {}",            extension_dir.display(),            extension_file.display()        );         Ok(())    }     async fn compile_grammar(        &self,        extension_dir: &Path,        grammar_name: &str,        grammar_metadata: &GrammarManifestEntry,    ) -> Result<()> {        let clang_path = self.install_wasi_sdk_if_needed().await?;         let mut grammar_repo_dir = extension_dir.to_path_buf();        grammar_repo_dir.extend(["grammars", grammar_name]);         let mut grammar_wasm_path = grammar_repo_dir.clone();        grammar_wasm_path.set_extension("wasm");         log::info!("checking out {grammar_name} parser");        self.checkout_repo(            &grammar_repo_dir,            &grammar_metadata.repository,            &grammar_metadata.rev,        )        .await?;         let base_grammar_path = grammar_metadata            .path            .as_ref()            .map(|path| grammar_repo_dir.join(path))            .unwrap_or(grammar_repo_dir);         let src_path = base_grammar_path.join("src");        let parser_path = src_path.join("parser.c");        let scanner_path = src_path.join("scanner.c");         // Skip recompiling if the WASM object is already newer than the source files        if file_newer_than_deps(&grammar_wasm_path, &[&parser_path, &scanner_path]).unwrap_or(false)        {            log::info!(                "skipping compilation of {grammar_name} parser because the existing compiled grammar is up to date"            );        } else {            log::info!("compiling {grammar_name} parser");            let clang_output = util::command::new_command(&clang_path)                .args(["-fPIC", "-shared", "-Os"])                .arg(format!("-Wl,--export=tree_sitter_{grammar_name}"))                .arg("-o")                .arg(&grammar_wasm_path)                .arg("-I")                .arg(&src_path)                .arg(&parser_path)                .args(scanner_path.exists().then_some(scanner_path))                .output()                .await                .context("failed to run clang")?;             if !clang_output.status.success() {                bail!(                    "failed to compile {} parser with clang: {}",                    grammar_name,                    String::from_utf8_lossy(&clang_output.stderr),                );            }        }         Ok(())    }     async fn checkout_repo(&self, directory: &Path, url: &str, rev: &str) -> Result<()> {        let git_dir = directory.join(".git");         if directory.exists() {            let remotes_output = util::command::new_command("git")                .arg("--git-dir")                .arg(&git_dir)                .args(["remote", "-v"])                .output()                .await?;            let has_remote = remotes_output.status.success()                && String::from_utf8_lossy(&remotes_output.stdout)                    .lines()                    .any(|line| {                        let mut parts = line.split(|c: char| c.is_whitespace());                        parts.next() == Some("origin") && parts.any(|part| part == url)                    });            if !has_remote {                bail!(                    "grammar directory '{}' already exists, but is not a git clone of '{}'",                    directory.display(),                    url                );            }        } else {            fs::create_dir_all(directory).with_context(|| {                format!("failed to create grammar directory {}", directory.display(),)            })?;            let init_output = util::command::new_command("git")                .arg("init")                .current_dir(directory)                .output()                .await?;            if !init_output.status.success() {                bail!(                    "failed to run `git init` in directory '{}'",                    directory.display()                );            }             let remote_add_output = util::command::new_command("git")                .arg("--git-dir")                .arg(&git_dir)                .args(["remote", "add", "origin", url])                .output()                .await                .context("failed to execute `git remote add`")?;            if !remote_add_output.status.success() {                bail!(                    "failed to add remote {url} for git repository {}",                    git_dir.display()                );            }        }         let fetch_output = util::command::new_command("git")            .arg("--git-dir")            .arg(&git_dir)            .args(["fetch", "--depth", "1", "origin", rev])            .output()            .await            .context("failed to execute `git fetch`")?;         let checkout_output = util::command::new_command("git")            .arg("--git-dir")            .arg(&git_dir)            .args(["checkout", rev])            .current_dir(directory)            .output()            .await            .context("failed to execute `git checkout`")?;        if !checkout_output.status.success() {            if !fetch_output.status.success() {                bail!(                    "failed to fetch revision {} in directory '{}'",                    rev,                    directory.display()                );            }            bail!(                "failed to checkout revision {} in directory '{}': {}",                rev,                directory.display(),                String::from_utf8_lossy(&checkout_output.stderr)            );        }         Ok(())    }     async fn install_rust_wasm_target_if_needed(&self) -> Result<()> {        let rustc_output = util::command::new_command("rustc")            .arg("--print")            .arg("sysroot")            .output()            .await            .context("failed to run rustc")?;        if !rustc_output.status.success() {            bail!(                "failed to retrieve rust sysroot: {}",                String::from_utf8_lossy(&rustc_output.stderr)            );        }         let sysroot = PathBuf::from(String::from_utf8(rustc_output.stdout)?.trim());        if sysroot.join("lib/rustlib").join(RUST_TARGET).exists() {            return Ok(());        }         let output = util::command::new_command("rustup")            .args(["target", "add", RUST_TARGET])            .stderr(Stdio::piped())            .stdout(Stdio::inherit())            .output()            .await            .context("failed to run `rustup target add`")?;        if !output.status.success() {            bail!(                "failed to install the `{RUST_TARGET}` target: {}",                String::from_utf8_lossy(&rustc_output.stderr)            );        }         Ok(())    }     async fn install_wasi_sdk_if_needed(&self) -> Result<PathBuf> {        let url = if let Some(asset_name) = WASI_SDK_ASSET_NAME {            format!("{WASI_SDK_URL}{asset_name}")        } else {            bail!("wasi-sdk is not available for platform {}", env::consts::OS);        };         let wasi_sdk_dir = self.cache_dir.join("wasi-sdk");        let mut clang_path = wasi_sdk_dir.clone();        clang_path.extend(["bin", &format!("clang{}", env::consts::EXE_SUFFIX)]);         log::info!("downloading wasi-sdk to {}", wasi_sdk_dir.display());         if fs::metadata(&clang_path).is_ok_and(|metadata| metadata.is_file()) {            return Ok(clang_path);        }         let tar_out_dir = self.cache_dir.join("wasi-sdk-temp");         fs::remove_dir_all(&wasi_sdk_dir).ok();        fs::remove_dir_all(&tar_out_dir).ok();        fs::create_dir_all(&tar_out_dir).context("failed to create extraction directory")?;         let mut response = self.http.get(&url, AsyncBody::default(), true).await?;         // Write the response to a temporary file        let tar_gz_path = self.cache_dir.join("wasi-sdk.tar.gz");        let tar_gz_file =            fs::File::create(&tar_gz_path).context("failed to create temporary tar.gz file")?;        let response_body = response.body_mut();         let mut async_file = io::AllowStdIo::new(tar_gz_file);        io::copy(response_body, &mut async_file)            .await            .context("failed to stream response to file")?;        drop(async_file);         log::info!("un-tarring wasi-sdk to {}", tar_out_dir.display());         // Shell out to tar to extract the archive        let tar_output = util::command::new_command("tar")            .arg("-xzf")            .arg(&tar_gz_path)            .arg("-C")            .arg(&tar_out_dir)            .output()            .await            .context("failed to run tar")?;         if !tar_output.status.success() {            bail!(                "failed to extract wasi-sdk archive: {}",                String::from_utf8_lossy(&tar_output.stderr)            );        }         log::info!("finished downloading wasi-sdk");         // Clean up the temporary tar.gz file        fs::remove_file(&tar_gz_path).ok();         let inner_dir = fs::read_dir(&tar_out_dir)?            .next()            .context("no content")?            .context("failed to read contents of extracted wasi archive directory")?            .path();        fs::rename(&inner_dir, &wasi_sdk_dir).context("failed to move extracted wasi dir")?;        fs::remove_dir_all(&tar_out_dir).ok();         Ok(clang_path)    }     // This was adapted from:    // https://github.com/bytecodealliance/wasm-tools/blob/e8809bb17fcf69aa8c85cd5e6db7cff5cf36b1de/src/bin/wasm-tools/strip.rs    fn strip_custom_sections(&self, input: &Vec<u8>) -> Result<Vec<u8>> {        use wasmparser::Payload::*;         let strip_custom_section = |name: &str| {            // Default strip everything but:            // * the `name` section            // * any `component-type` sections            // * the `dylink.0` section            // * our custom version section

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