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https://github.com/denoland/deno.git
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127 lines
3.3 KiB
Rust
127 lines
3.3 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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mod errors;
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mod esm_resolver;
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use deno_core::error::AnyError;
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use deno_core::located_script_name;
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use deno_core::url::Url;
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use deno_core::JsRuntime;
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pub use esm_resolver::check_if_should_use_esm_loader;
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pub(crate) use esm_resolver::NodeEsmResolver;
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// TODO(bartlomieju): this needs to be bumped manually for
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// each release, a better mechanism is preferable, but it's a quick and dirty
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// solution to avoid printing `X-Deno-Warning` headers when the compat layer is
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// downloaded
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static STD_URL_STR: &str = "https://deno.land/std@0.116.0/";
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static SUPPORTED_MODULES: &[&str] = &[
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"assert",
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"assert/strict",
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"async_hooks",
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"buffer",
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"child_process",
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"cluster",
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"console",
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"constants",
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"crypto",
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"dgram",
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"dns",
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"domain",
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"events",
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"fs",
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"fs/promises",
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"http",
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"https",
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"module",
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"net",
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"os",
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"path",
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"path/posix",
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"path/win32",
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"perf_hooks",
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"process",
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"querystring",
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"readline",
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"stream",
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"stream/promises",
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"stream/web",
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"string_decoder",
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"sys",
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"timers",
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"timers/promises",
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"tls",
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"tty",
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"url",
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"util",
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"util/types",
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"v8",
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"vm",
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"zlib",
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];
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lazy_static::lazy_static! {
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static ref NODE_COMPAT_URL: String = std::env::var("DENO_NODE_COMPAT_URL").map(String::into).ok()
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.unwrap_or_else(|| STD_URL_STR.to_string());
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static ref GLOBAL_URL_STR: String = format!("{}node/global.ts", NODE_COMPAT_URL.as_str());
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pub(crate) static ref GLOBAL_URL: Url = Url::parse(&GLOBAL_URL_STR).unwrap();
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static ref MODULE_URL_STR: String = format!("{}node/module.ts", NODE_COMPAT_URL.as_str());
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pub(crate) static ref MODULE_URL: Url = Url::parse(&MODULE_URL_STR).unwrap();
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static ref COMPAT_IMPORT_URL: Url = Url::parse("flags:compat").unwrap();
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}
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/// Provide imports into a module graph when the compat flag is true.
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pub(crate) fn get_node_imports() -> Vec<(Url, Vec<String>)> {
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vec![(COMPAT_IMPORT_URL.clone(), vec![GLOBAL_URL_STR.clone()])]
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}
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fn try_resolve_builtin_module(specifier: &str) -> Option<Url> {
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if SUPPORTED_MODULES.contains(&specifier) {
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let module_url =
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format!("{}node/{}.ts", NODE_COMPAT_URL.as_str(), specifier);
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Some(Url::parse(&module_url).unwrap())
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} else {
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None
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}
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}
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pub(crate) fn load_cjs_module(
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js_runtime: &mut JsRuntime,
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main_module: &str,
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) -> Result<(), AnyError> {
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let source_code = &format!(
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r#"(async function loadCjsModule(main) {{
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const Module = await import("{}");
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Module.default._load(main, null, true);
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}})('{}');"#,
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MODULE_URL_STR.as_str(),
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escape_for_single_quote_string(main_module),
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);
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js_runtime.execute_script(&located_script_name!(), source_code)?;
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Ok(())
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}
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pub(crate) fn add_global_require(
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js_runtime: &mut JsRuntime,
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main_module: &str,
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) -> Result<(), AnyError> {
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let source_code = &format!(
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r#"(async function setupGlobalRequire(main) {{
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const Module = await import("{}");
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const require = Module.createRequire(main);
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globalThis.require = require;
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}})('{}');"#,
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MODULE_URL_STR.as_str(),
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escape_for_single_quote_string(main_module),
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);
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js_runtime.execute_script(&located_script_name!(), source_code)?;
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Ok(())
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}
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fn escape_for_single_quote_string(text: &str) -> String {
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text.replace(r"\", r"\\").replace("'", r"\'")
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}
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