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denoland-deno/cli/compat.rs
Bartek Iwańczuk b686907a45
feat(compat): inject Node globals (#12342)
This commit adds automatic injection of Node globals when "--compat" flag
is present.

This is done by executing "https://deno.land/std/node/global.ts" as a "side module",
before main module is executed.

This commit makes "--compat" required to be used with "--unstable" flag, as some
of Node globals require unstable Deno APIs.
2021-10-06 19:07:04 +02:00

76 lines
1.6 KiB
Rust

// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
use deno_core::url::Url;
use std::collections::HashMap;
static STD_NODE: &str = "https://deno.land/std/node/";
static SUPPORTED_MODULES: &[&str] = &[
"assert",
"assert/strict",
"async_hooks",
"buffer",
"child_process",
"cluster",
"console",
"constants",
"crypto",
"dgram",
"dns",
"domain",
"events",
"fs",
"fs/promises",
"http",
"https",
"module",
"net",
"os",
"path",
"path/posix",
"path/win32",
"perf_hooks",
"process",
"querystring",
"readline",
"stream",
"stream/promises",
"stream/web",
"string_decoder",
"sys",
"timers",
"timers/promises",
"tls",
"tty",
"url",
"util",
"util/types",
"v8",
"vm",
"zlib",
];
pub fn get_node_globals_url() -> Url {
Url::parse(&format!("{}global.ts", STD_NODE)).unwrap()
}
/// Create a map that can be used to update import map.
///
/// Keys are built-in Node modules (and built-ins prefixed with "node:"), while
/// values are URLs pointing to relevant files in deno.land/std/node/ directory.
pub fn get_mapped_node_builtins() -> HashMap<String, String> {
let mut mappings = HashMap::new();
for module in SUPPORTED_MODULES {
// TODO(bartlomieju): this is unversioned, and should be fixed to use latest stable?
let module_url = format!("{}{}.ts", STD_NODE, module);
mappings.insert(module.to_string(), module_url.clone());
// Support for `node:<module_name>`
// https://nodejs.org/api/esm.html#esm_node_imports
let node_prefixed = format!("node:{}", module);
mappings.insert(node_prefixed, module_url);
}
mappings
}