diff options
Diffstat (limited to 'cli/compat/mod.rs')
| -rw-r--r-- | cli/compat/mod.rs | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/cli/compat/mod.rs b/cli/compat/mod.rs deleted file mode 100644 index 0581f208f..000000000 --- a/cli/compat/mod.rs +++ /dev/null @@ -1,190 +0,0 @@ -// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license. - -mod esm_resolver; - -use crate::file_fetcher::FileFetcher; -use crate::node::NODE_COMPAT_URL; -use crate::node::SUPPORTED_MODULES; -use deno_ast::MediaType; -use deno_core::error::AnyError; -use deno_core::located_script_name; -use deno_core::url::Url; -use deno_core::JsRuntime; -use deno_core::ModuleSpecifier; -use once_cell::sync::Lazy; - -pub use esm_resolver::check_if_should_use_esm_loader; -pub use esm_resolver::NodeEsmResolver; - -pub static GLOBAL_URL: Lazy<Url> = - Lazy::new(|| NODE_COMPAT_URL.join("node/global.ts").unwrap()); - -pub static MODULE_URL: Lazy<Url> = - Lazy::new(|| NODE_COMPAT_URL.join("node/module.ts").unwrap()); - -static COMPAT_IMPORT_URL: Lazy<Url> = - Lazy::new(|| Url::parse("flags:compat").unwrap()); - -/// Provide imports into a module graph when the compat flag is true. -pub fn get_node_imports() -> Vec<(Url, Vec<String>)> { - vec![( - COMPAT_IMPORT_URL.clone(), - vec![GLOBAL_URL.as_str().to_owned()], - )] -} - -pub fn load_cjs_module( - js_runtime: &mut JsRuntime, - module: &str, - main: bool, -) -> Result<(), AnyError> { - let source_code = &format!( - r#"(async function loadCjsModule(module) {{ - const Module = await import("{module_loader}"); - Module.default._load(module, null, {main}); - }})('{module}');"#, - module_loader = MODULE_URL.as_str(), - main = main, - module = escape_for_single_quote_string(module), - ); - - js_runtime.execute_script(&located_script_name!(), source_code)?; - Ok(()) -} - -pub fn add_global_require( - js_runtime: &mut JsRuntime, - main_module: &str, -) -> Result<(), AnyError> { - let source_code = &format!( - r#"(async function setupGlobalRequire(main) {{ - const Module = await import("{}"); - const require = Module.createRequire(main); - globalThis.require = require; - }})('{}');"#, - MODULE_URL.as_str(), - escape_for_single_quote_string(main_module), - ); - - js_runtime.execute_script(&located_script_name!(), source_code)?; - Ok(()) -} - -fn escape_for_single_quote_string(text: &str) -> String { - text.replace('\\', r"\\").replace('\'', r"\'") -} - -pub fn setup_builtin_modules( - js_runtime: &mut JsRuntime, -) -> Result<(), AnyError> { - let mut script = String::new(); - for module in SUPPORTED_MODULES { - // skipping the modules that contains '/' as they are not available in NodeJS repl as well - if !module.name.contains('/') { - script = format!( - "{}const {MODULE_NAME} = require('{MODULE_NAME}');\n", - script, - MODULE_NAME = module.name - ); - } - } - - js_runtime.execute_script("setup_node_builtins.js", &script)?; - Ok(()) -} - -/// Translates given CJS module into ESM. This function will perform static -/// analysis on the file to find defined exports and reexports. -/// -/// For all discovered reexports the analysis will be performed recursively. -/// -/// If successful a source code for equivalent ES module is returned. -pub fn translate_cjs_to_esm( - file_fetcher: &FileFetcher, - specifier: &ModuleSpecifier, - code: String, - media_type: MediaType, -) -> Result<String, AnyError> { - let parsed_source = deno_ast::parse_script(deno_ast::ParseParams { - specifier: specifier.to_string(), - text_info: deno_ast::SourceTextInfo::new(code.into()), - media_type, - capture_tokens: true, - scope_analysis: false, - maybe_syntax: None, - })?; - let analysis = parsed_source.analyze_cjs(); - - let mut source = vec![ - r#"import { createRequire } from "node:module";"#.to_string(), - r#"const require = createRequire(import.meta.url);"#.to_string(), - ]; - - // if there are reexports, handle them first - for (idx, reexport) in analysis.reexports.iter().enumerate() { - // Firstly, resolve relate reexport specifier - let resolved_reexport = node_resolver::resolve( - reexport, - &specifier.to_file_path().unwrap(), - // FIXME(bartlomieju): check if these conditions are okay, probably - // should be `deno-require`, because `deno` is already used in `esm_resolver.rs` - &["deno", "require", "default"], - )?; - let reexport_specifier = - ModuleSpecifier::from_file_path(&resolved_reexport).unwrap(); - // Secondly, read the source code from disk - let reexport_file = file_fetcher.get_source(&reexport_specifier).unwrap(); - // Now perform analysis again - { - let parsed_source = deno_ast::parse_script(deno_ast::ParseParams { - specifier: reexport_specifier.to_string(), - text_info: deno_ast::SourceTextInfo::new(reexport_file.source), - media_type: reexport_file.media_type, - capture_tokens: true, - scope_analysis: false, - maybe_syntax: None, - })?; - let analysis = parsed_source.analyze_cjs(); - - source.push(format!( - "const reexport{} = require(\"{}\");", - idx, reexport - )); - - for export in analysis.exports.iter().filter(|e| e.as_str() != "default") - { - // TODO(bartlomieju): Node actually checks if a given export exists in `exports` object, - // but it might not be necessary here since our analysis is more detailed? - source.push(format!( - "export const {0} = Deno[Deno.internal].require.bindExport(reexport{1}.{2}, reexport{1});", - export, idx, export - )); - } - } - } - - source.push(format!( - "const mod = require(\"{}\");", - specifier - .to_file_path() - .unwrap() - .to_str() - .unwrap() - .replace('\\', "\\\\") - .replace('\'', "\\\'") - .replace('\"', "\\\"") - )); - source.push("export default mod;".to_string()); - - for export in analysis.exports.iter().filter(|e| e.as_str() != "default") { - // TODO(bartlomieju): Node actually checks if a given export exists in `exports` object, - // but it might not be necessary here since our analysis is more detailed? - source.push(format!( - "export const {} = Deno[Deno.internal].require.bindExport(mod.{}, mod);", - export, export - )); - } - - let translated_source = source.join("\n"); - Ok(translated_source) -} |