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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import * as msg from "gen/cli/msg_generated";
import { core } from "./core";
import { handleAsyncMsgFromRust, sendSync } from "./dispatch";
import * as flatbuffers from "./flatbuffers";
import { assert } from "./util";
import * as util from "./util";
import { window } from "./window";
/** The current process id of the runtime. */
export let pid: number;
/** Reflects the NO_COLOR environment variable: https://no-color.org/ */
export let noColor: boolean;
/** Path to the current deno process's executable file. */
export let execPath: string;
function setGlobals(pid_: number, noColor_: boolean, execPath_: string): void {
assert(!pid);
pid = pid_;
noColor = noColor_;
execPath = execPath_;
}
/** Check if running in terminal.
*
* console.log(Deno.isTTY().stdout);
*/
export function isTTY(): { stdin: boolean; stdout: boolean; stderr: boolean } {
const builder = flatbuffers.createBuilder();
const inner = msg.IsTTY.createIsTTY(builder);
const baseRes = sendSync(builder, msg.Any.IsTTY, inner)!;
assert(msg.Any.IsTTYRes === baseRes.innerType());
const res = new msg.IsTTYRes();
assert(baseRes.inner(res) != null);
return { stdin: res.stdin(), stdout: res.stdout(), stderr: res.stderr() };
}
/** Exit the Deno process with optional exit code. */
export function exit(exitCode = 0): never {
const builder = flatbuffers.createBuilder();
const inner = msg.Exit.createExit(builder, exitCode);
sendSync(builder, msg.Any.Exit, inner);
return util.unreachable();
}
function setEnv(key: string, value: string): void {
const builder = flatbuffers.createBuilder();
const key_ = builder.createString(key);
const value_ = builder.createString(value);
const inner = msg.SetEnv.createSetEnv(builder, key_, value_);
sendSync(builder, msg.Any.SetEnv, inner);
}
function createEnv(inner: msg.EnvironRes): { [index: string]: string } {
const env: { [index: string]: string } = {};
for (let i = 0; i < inner.mapLength(); i++) {
const item = inner.map(i)!;
env[item.key()!] = item.value()!;
}
return new Proxy(env, {
set(obj, prop: string, value: string): boolean {
setEnv(prop, value);
return Reflect.set(obj, prop, value);
}
});
}
/** Returns a snapshot of the environment variables at invocation. Mutating a
* property in the object will set that variable in the environment for
* the process. The environment object will only accept `string`s
* as values.
*
* const myEnv = Deno.env();
* console.log(myEnv.SHELL);
* myEnv.TEST_VAR = "HELLO";
* const newEnv = Deno.env();
* console.log(myEnv.TEST_VAR == newEnv.TEST_VAR);
*/
export function env(): { [index: string]: string } {
/* Ideally we could write
const res = sendSync({
command: msg.Command.ENV,
});
*/
const builder = flatbuffers.createBuilder();
const inner = msg.Environ.createEnviron(builder);
const baseRes = sendSync(builder, msg.Any.Environ, inner)!;
assert(msg.Any.EnvironRes === baseRes.innerType());
const res = new msg.EnvironRes();
assert(baseRes.inner(res) != null);
// TypeScript cannot track assertion above, therefore not null assertion
return createEnv(res);
}
/** Send to the privileged side that we have setup and are ready. */
function sendStart(): msg.StartRes {
const builder = flatbuffers.createBuilder();
const startOffset = msg.Start.createStart(builder, 0 /* unused */);
const baseRes = sendSync(builder, msg.Any.Start, startOffset);
assert(baseRes != null);
assert(msg.Any.StartRes === baseRes!.innerType());
const startResMsg = new msg.StartRes();
assert(baseRes!.inner(startResMsg) != null);
return startResMsg;
}
// This function bootstraps an environment within Deno, it is shared both by
// the runtime and the compiler environments.
// @internal
export function start(source?: string): msg.StartRes {
core.setAsyncHandler(handleAsyncMsgFromRust);
// First we send an empty `Start` message to let the privileged side know we
// are ready. The response should be a `StartRes` message containing the CLI
// args and other info.
const startResMsg = sendStart();
util.setLogDebug(startResMsg.debugFlag(), source);
setGlobals(startResMsg.pid(), startResMsg.noColor(), startResMsg.execPath()!);
// Deno.core could ONLY be safely frozen here (not in globals.ts)
// since shared_queue.js will modify core properties.
Object.freeze(window.Deno.core);
return startResMsg;
}
/**
* Returns the current user's home directory.
* Does not require elevated privileges.
*/
export function homeDir(): string {
const builder = flatbuffers.createBuilder();
const inner = msg.HomeDir.createHomeDir(builder);
const baseRes = sendSync(builder, msg.Any.HomeDir, inner)!;
assert(msg.Any.HomeDirRes === baseRes.innerType());
const res = new msg.HomeDirRes();
assert(baseRes.inner(res) != null);
const path = res.path();
if (!path) {
throw new Error("Could not get home directory.");
}
return path;
}
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