Port internal TS code to JS (#6793)

Co-authored-by: Ryan Dahl <ry@tinyclouds.org>

1 files changed, 0 insertions, 177 deletions

diff --git a/cli/js/repl.ts b/cli/js/repl.ts
deleted file mode 100644
index 9f2693de6..000000000
--- a/cli/js/repl.ts
+++ /dev/null
@@ -1,177 +0,0 @@
-// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-
-import { exit } from "./ops/os.ts";
-import { core } from "./core.ts";
-import { version } from "./version.ts";
-import { inspectArgs } from "./web/console.ts";
-import { startRepl, readline } from "./ops/repl.ts";
-import { close } from "./ops/resources.ts";
-
-function replLog(...args: unknown[]): void {
-  core.print(inspectArgs(args) + "\n");
-}
-
-function replError(...args: unknown[]): void {
-  core.print(inspectArgs(args) + "\n", true);
-}
-
-// Error messages that allow users to continue input
-// instead of throwing an error to REPL
-// ref: https://github.com/v8/v8/blob/master/src/message-template.h
-// TODO(kevinkassimo): this list might not be comprehensive
-const recoverableErrorMessages = [
-  "Unexpected end of input", // { or [ or (
-  "Missing initializer in const declaration", // const a
-  "Missing catch or finally after try", // try {}
-  "missing ) after argument list", // console.log(1
-  "Unterminated template literal", // `template
-  // TODO(kevinkassimo): need a parser to handling errors such as:
-  // "Missing } in template expression" // `${ or `${ a 123 }`
-];
-
-function isRecoverableError(e: Error): boolean {
-  return recoverableErrorMessages.includes(e.message);
-}
-
-// Returns `true` if `close()` is called in REPL.
-// We should quit the REPL when this function returns `true`.
-function isCloseCalled(): boolean {
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  return (globalThis as any).closed;
-}
-
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-type Value = any;
-
-let lastEvalResult: Value = undefined;
-let lastThrownError: Value = undefined;
-
-// Evaluate code.
-// Returns true if code is consumed (no error/irrecoverable error).
-// Returns false if error is recoverable
-function evaluate(code: string): boolean {
-  // each evalContext is a separate function body, and we want strict mode to
-  // work, so we should ensure that the code starts with "use strict"
-  const [result, errInfo] = core.evalContext(`"use strict";\n\n${code}`);
-  if (!errInfo) {
-    // when a function is eval'ed with just "use strict" sometimes the result
-    // is "use strict" which should be discarded
-    lastEvalResult = typeof result === "string" && result === "use strict"
-      ? undefined
-      : result;
-    if (!isCloseCalled()) {
-      replLog(lastEvalResult);
-    }
-  } else if (errInfo.isCompileError && isRecoverableError(errInfo.thrown)) {
-    // Recoverable compiler error
-    return false; // don't consume code.
-  } else {
-    lastThrownError = errInfo.thrown;
-    if (errInfo.isNativeError) {
-      const formattedError = core.formatError(errInfo.thrown as Error);
-      replError(formattedError);
-    } else {
-      replError("Thrown:", errInfo.thrown);
-    }
-  }
-  return true;
-}
-
-// @internal
-export async function replLoop(): Promise<void> {
-  const { console } = globalThis;
-
-  const historyFile = "deno_history.txt";
-  const rid = startRepl(historyFile);
-
-  const quitRepl = (exitCode: number): void => {
-    // Special handling in case user calls deno.close(3).
-    try {
-      close(rid); // close signals Drop on REPL and saves history.
-    } catch {}
-    exit(exitCode);
-  };
-
-  // Configure globalThis._ to give the last evaluation result.
-  Object.defineProperty(globalThis, "_", {
-    configurable: true,
-    get: (): Value => lastEvalResult,
-    set: (value: Value): Value => {
-      Object.defineProperty(globalThis, "_", {
-        value: value,
-        writable: true,
-        enumerable: true,
-        configurable: true,
-      });
-      console.log("Last evaluation result is no longer saved to _.");
-    },
-  });
-
-  // Configure globalThis._error to give the last thrown error.
-  Object.defineProperty(globalThis, "_error", {
-    configurable: true,
-    get: (): Value => lastThrownError,
-    set: (value: Value): Value => {
-      Object.defineProperty(globalThis, "_error", {
-        value: value,
-        writable: true,
-        enumerable: true,
-        configurable: true,
-      });
-      console.log("Last thrown error is no longer saved to _error.");
-    },
-  });
-
-  replLog(`Deno ${version.deno}`);
-  replLog("exit using ctrl+d or close()");
-
-  while (true) {
-    if (isCloseCalled()) {
-      quitRepl(0);
-    }
-
-    let code = "";
-    // Top level read
-    try {
-      code = await readline(rid, "> ");
-      if (code.trim() === "") {
-        continue;
-      }
-    } catch (err) {
-      if (err.message === "EOF") {
-        quitRepl(0);
-      } else {
-        // If interrupted, don't print error.
-        if (err.message !== "Interrupted") {
-          // e.g. this happens when we have deno.close(3).
-          // We want to display the problem.
-          const formattedError = core.formatError(err);
-          replError(formattedError);
-        }
-        // Quit REPL anyways.
-        quitRepl(1);
-      }
-    }
-    // Start continued read
-    while (!evaluate(code)) {
-      code += "\n";
-      try {
-        code += await readline(rid, "  ");
-      } catch (err) {
-        // If interrupted on continued read,
-        // abort this read instead of quitting.
-        if (err.message === "Interrupted") {
-          break;
-        } else if (err.message === "EOF") {
-          quitRepl(0);
-        } else {
-          // e.g. this happens when we have deno.close(3).
-          // We want to display the problem.
-          const formattedError = core.formatError(err);
-          replError(formattedError);
-          quitRepl(1);
-        }
-      }
-    }
-  }
-}