chore: remove std directory (#9361)

This removes the std folder from the tree.

Various parts of the tests are pretty tightly dependent 
on std (47 direct imports and 75 indirect imports, not 
counting the cli tests that use them as fixtures) so I've 
added std as a submodule for now.

3 files changed, 0 insertions, 202 deletions

diff --git a/std/signal/README.md b/std/signal/README.md
deleted file mode 100644
index 7a152cdca..000000000
--- a/std/signal/README.md
+++ /dev/null
@@ -1,38 +0,0 @@
-# signal
-
-signal is a module used to capture and monitor OS signals.
-
-# usage
-
-The following functions are exposed in `mod.ts`:
-
-## signal
-
-Generates an AsyncIterable which can be awaited on for one or more signals.
-`dispose()` can be called when you are finished waiting on the events.
-
-```typescript
-import { signal } from "https://deno.land/std/signal/mod.ts";
-const sig = signal(Deno.Signal.SIGUSR1, Deno.Signal.SIGINT);
-setTimeout(() => {}, 5000); // Prevents exiting immediately.
-
-for await (const _ of sig) {
-  // ..
-}
-
-// At some other point in your code when finished listening:
-sig.dispose();
-```
-
-## onSignal
-
-Registers a callback function to be called on triggering of a signal event.
-
-```typescript
-import { onSignal } from "https://deno.land/std/signal/mod.ts";
-
-const handle = onSignal(Deno.Signal.SIGINT, () => {
-  // ...
-  handle.dispose(); // de-register from receiving further events.
-});
-```
diff --git a/std/signal/mod.ts b/std/signal/mod.ts
deleted file mode 100644
index c28cf5e99..000000000
--- a/std/signal/mod.ts
+++ /dev/null
@@ -1,73 +0,0 @@
-// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
-import { MuxAsyncIterator } from "../async/mux_async_iterator.ts";
-
-export type Disposable = { dispose: () => void };
-
-/**
- * Generates an AsyncIterable which can be awaited on for one or more signals.
- * `dispose()` can be called when you are finished waiting on the events.
- *
- * Example:
- *
- *       const sig = signal(Deno.Signal.SIGUSR1, Deno.Signal.SIGINT);
- *       setTimeout(() => {}, 5000); // Prevents exiting immediately
- *
- *       for await (const _ of sig) {
- *         console.log("interrupt or usr1 signal received");
- *       }
- *
- *       // At some other point in your code when finished listening:
- *       sig.dispose();
- *
- * @param signos - one or more `Deno.Signal`s to await on
- */
-export function signal(
-  ...signos: [number, ...number[]]
-): AsyncIterable<void> & Disposable {
-  const mux = new MuxAsyncIterator<void>();
-
-  if (signos.length < 1) {
-    throw new Error(
-      "No signals are given. You need to specify at least one signal to create a signal stream.",
-    );
-  }
-
-  const streams = signos.map(Deno.signal);
-
-  streams.forEach((stream) => {
-    mux.add(stream);
-  });
-
-  // Create dispose method for the muxer of signal streams.
-  const dispose = (): void => {
-    streams.forEach((stream) => {
-      stream.dispose();
-    });
-  };
-
-  return Object.assign(mux, { dispose });
-}
-
-/**
- * Registers a callback function to be called on triggering of a signal event.
- *
- *       const handle = onSignal(Deno.Signal.SIGINT, () => {
- *         console.log('Received SIGINT');
- *         handle.dispose();  // de-register from receiving further events
- *       });
- *
- * @param signo One of Deno.Signal (e.g. Deno.Signal.SIGINT)
- * @param callback Callback function triggered upon signal event
- */
-export function onSignal(signo: number, callback: () => void): Disposable {
-  const sig = signal(signo);
-
-  // allows `sig` to be returned before blocking on the await
-  (async (): Promise<void> => {
-    for await (const _ of sig) {
-      callback();
-    }
-  })();
-
-  return sig;
-}
diff --git a/std/signal/test.ts b/std/signal/test.ts
deleted file mode 100644
index d56b7920d..000000000
--- a/std/signal/test.ts
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
-import { assertEquals, assertThrows } from "../testing/asserts.ts";
-import { delay } from "../async/delay.ts";
-import { onSignal, signal } from "./mod.ts";
-
-Deno.test({
-  name: "signal() throws when called with empty signals",
-  ignore: Deno.build.os === "windows",
-  fn() {
-    assertThrows(
-      () => {
-        // deno-lint-ignore no-explicit-any
-        (signal as any)();
-      },
-      Error,
-      "No signals are given. You need to specify at least one signal to create a signal stream.",
-    );
-  },
-});
-
-Deno.test({
-  name: "signal() iterates for multiple signals",
-  ignore: Deno.build.os === "windows",
-  fn: async (): Promise<void> => {
-    // This prevents the program from exiting.
-    const t = setInterval(() => {}, 1000);
-
-    let c = 0;
-    const sig = signal(
-      Deno.Signal.SIGUSR1,
-      Deno.Signal.SIGUSR2,
-      Deno.Signal.SIGINT,
-    );
-
-    setTimeout(async () => {
-      await delay(20);
-      Deno.kill(Deno.pid, Deno.Signal.SIGINT);
-      await delay(20);
-      Deno.kill(Deno.pid, Deno.Signal.SIGUSR2);
-      await delay(20);
-      Deno.kill(Deno.pid, Deno.Signal.SIGUSR1);
-      await delay(20);
-      Deno.kill(Deno.pid, Deno.Signal.SIGUSR2);
-      await delay(20);
-      Deno.kill(Deno.pid, Deno.Signal.SIGUSR1);
-      await delay(20);
-      Deno.kill(Deno.pid, Deno.Signal.SIGINT);
-      await delay(20);
-      sig.dispose();
-    });
-
-    for await (const _ of sig) {
-      c += 1;
-    }
-
-    assertEquals(c, 6);
-
-    clearTimeout(t);
-  },
-});
-
-Deno.test({
-  name: "onSignal() registers and disposes of event handler",
-  ignore: Deno.build.os === "windows",
-  async fn() {
-    // This prevents the program from exiting.
-    const t = setInterval(() => {}, 1000);
-
-    let calledCount = 0;
-    const handle = onSignal(Deno.Signal.SIGINT, () => {
-      calledCount++;
-    });
-
-    await delay(20);
-    Deno.kill(Deno.pid, Deno.Signal.SIGINT);
-    await delay(20);
-    Deno.kill(Deno.pid, Deno.Signal.SIGINT);
-    await delay(20);
-    Deno.kill(Deno.pid, Deno.Signal.SIGUSR2);
-    await delay(20);
-    handle.dispose(); // stop monitoring SIGINT
-    await delay(20);
-    Deno.kill(Deno.pid, Deno.Signal.SIGUSR1);
-    await delay(20);
-    Deno.kill(Deno.pid, Deno.Signal.SIGINT);
-    await delay(20);
-    assertEquals(calledCount, 2);
-
-    clearTimeout(t);
-  },
-});