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Code Issues Packages 1 Wiki Activity

Add repl functions "help" and "exit" (#1563)

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This commit is contained in:
Sergey Golovin 2019-01-29 22:41:12 +03:00 • committed by Ryan Dahl
parent 457e65bc2f
commit 240ca25617
2 changed files with 31 additions and 6 deletions
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24
js/repl.ts
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@ -10,6 +10,24 @@ import { globalEval } from "./global_eval";
const window = globalEval("this");
const helpMsg = [
"exit Exit the REPL",
"help Print this help message"
].join("\n");
const replCommands = {
exit: {
get() {
exit(0);
}
},
help: {
get() {
return helpMsg;
}
}
};
function startRepl(historyFile: string): number {
const builder = flatbuffers.createBuilder();
const historyFile_ = builder.createString(historyFile);
@ -54,6 +72,7 @@ export async function readline(rid: number, prompt: string): Promise<string> {
// @internal
export async function replLoop(): Promise<void> {
window.deno = deno; // FIXME use a new scope (rather than window).
Object.defineProperties(window, replCommands);
const historyFile = "deno_history.txt";
const rid = startRepl(historyFile);
@ -69,11 +88,6 @@ export async function replLoop(): Promise<void> {
console.error(err);
exit(1);
}
if (!code) {
continue;
} else if (code.trim() === ".exit") {
break;
}
evaluate(code);
}

13
tools/repl_test.py
View file

@ -56,11 +56,22 @@ class Repl(object):
assertEqual(code, 0)
def test_exit_command(self):
out, err, code = self.input(".exit", "'ignored'", exit=False)
out, err, code = self.input("exit", "'ignored'", exit=False)
assertEqual(out, '')
assertEqual(err, '')
assertEqual(code, 0)
def test_help_command(self):
out, err, code = self.input("help")
expectedOut = '\n'.join([
"exit Exit the REPL",
"help Print this help message",
"",
])
assertEqual(out, expectedOut)
assertEqual(err, '')
assertEqual(code, 0)
def test_function(self):
out, err, code = self.input("deno.writeFileSync")
assertEqual(out, '[Function: writeFileSync]\n')