Reduce size of TypeScript Compiler snapshot (#6809)

This PR is intentionally ugly. It duplicates all of the code in cli/js2/ into
cli/tsc/  ... because it's very important that we all understand that this code
is unnecessarily duplicated in our binary. I hope this ugliness provides the
motivation to clean it up.

The typescript git submodule is removed, because it's a very large repo and
contains all sorts of stuff we don't need. Instead the necessary files are
copied directly into the deno repo. Hence +200k lines.

COMPILER_SNAPSHOT.bin size
```
master         3448139
this branch    3320972
```

Fixes #6812

1 files changed, 267 insertions, 0 deletions

diff --git a/cli/tsc/40_error_stack.js b/cli/tsc/40_error_stack.js
new file mode 100644
index 000000000..80f4fc5ed
--- /dev/null
+++ b/cli/tsc/40_error_stack.js
@@ -0,0 +1,267 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+((window) => {
+  // Some of the code here is adapted directly from V8 and licensed under a BSD
+  // style license available here: https://github.com/v8/v8/blob/24886f2d1c565287d33d71e4109a53bf0b54b75c/LICENSE.v8
+  const colors = window.__bootstrap.colors;
+  const assert = window.__bootstrap.util.assert;
+  const internals = window.__bootstrap.internals;
+  const dispatchJson = window.__bootstrap.dispatchJson;
+
+  function opFormatDiagnostics(items) {
+    return dispatchJson.sendSync("op_format_diagnostic", { items });
+  }
+
+  function opApplySourceMap(location) {
+    const res = dispatchJson.sendSync("op_apply_source_map", location);
+    return {
+      fileName: res.fileName,
+      lineNumber: res.lineNumber,
+      columnNumber: res.columnNumber,
+    };
+  }
+
+  function patchCallSite(callSite, location) {
+    return {
+      getThis() {
+        return callSite.getThis();
+      },
+      getTypeName() {
+        return callSite.getTypeName();
+      },
+      getFunction() {
+        return callSite.getFunction();
+      },
+      getFunctionName() {
+        return callSite.getFunctionName();
+      },
+      getMethodName() {
+        return callSite.getMethodName();
+      },
+      getFileName() {
+        return location.fileName;
+      },
+      getLineNumber() {
+        return location.lineNumber;
+      },
+      getColumnNumber() {
+        return location.columnNumber;
+      },
+      getEvalOrigin() {
+        return callSite.getEvalOrigin();
+      },
+      isToplevel() {
+        return callSite.isToplevel();
+      },
+      isEval() {
+        return callSite.isEval();
+      },
+      isNative() {
+        return callSite.isNative();
+      },
+      isConstructor() {
+        return callSite.isConstructor();
+      },
+      isAsync() {
+        return callSite.isAsync();
+      },
+      isPromiseAll() {
+        return callSite.isPromiseAll();
+      },
+      getPromiseIndex() {
+        return callSite.getPromiseIndex();
+      },
+    };
+  }
+
+  function getMethodCall(callSite) {
+    let result = "";
+
+    const typeName = callSite.getTypeName();
+    const methodName = callSite.getMethodName();
+    const functionName = callSite.getFunctionName();
+
+    if (functionName) {
+      if (typeName) {
+        const startsWithTypeName = functionName.startsWith(typeName);
+        if (!startsWithTypeName) {
+          result += `${typeName}.`;
+        }
+      }
+      result += functionName;
+
+      if (methodName) {
+        if (!functionName.endsWith(methodName)) {
+          result += ` [as ${methodName}]`;
+        }
+      }
+    } else {
+      if (typeName) {
+        result += `${typeName}.`;
+      }
+      if (methodName) {
+        result += methodName;
+      } else {
+        result += "<anonymous>";
+      }
+    }
+
+    return result;
+  }
+
+  function getFileLocation(callSite, internal = false) {
+    const cyan = internal ? colors.gray : colors.cyan;
+    const yellow = internal ? colors.gray : colors.yellow;
+    const black = internal ? colors.gray : (s) => s;
+    if (callSite.isNative()) {
+      return cyan("native");
+    }
+
+    let result = "";
+
+    const fileName = callSite.getFileName();
+    if (!fileName && callSite.isEval()) {
+      const evalOrigin = callSite.getEvalOrigin();
+      assert(evalOrigin != null);
+      result += cyan(`${evalOrigin}, `);
+    }
+
+    if (fileName) {
+      result += cyan(fileName);
+    } else {
+      result += cyan("<anonymous>");
+    }
+
+    const lineNumber = callSite.getLineNumber();
+    if (lineNumber != null) {
+      result += `${black(":")}${yellow(lineNumber.toString())}`;
+
+      const columnNumber = callSite.getColumnNumber();
+      if (columnNumber != null) {
+        result += `${black(":")}${yellow(columnNumber.toString())}`;
+      }
+    }
+
+    return result;
+  }
+
+  function callSiteToString(callSite, internal = false) {
+    const cyan = internal ? colors.gray : colors.cyan;
+    const black = internal ? colors.gray : (s) => s;
+
+    let result = "";
+    const functionName = callSite.getFunctionName();
+
+    const isTopLevel = callSite.isToplevel();
+    const isAsync = callSite.isAsync();
+    const isPromiseAll = callSite.isPromiseAll();
+    const isConstructor = callSite.isConstructor();
+    const isMethodCall = !(isTopLevel || isConstructor);
+
+    if (isAsync) {
+      result += colors.gray("async ");
+    }
+    if (isPromiseAll) {
+      result += colors.bold(
+        colors.italic(
+          black(`Promise.all (index ${callSite.getPromiseIndex()})`),
+        ),
+      );
+      return result;
+    }
+    if (isMethodCall) {
+      result += colors.bold(colors.italic(black(getMethodCall(callSite))));
+    } else if (isConstructor) {
+      result += colors.gray("new ");
+      if (functionName) {
+        result += colors.bold(colors.italic(black(functionName)));
+      } else {
+        result += cyan("<anonymous>");
+      }
+    } else if (functionName) {
+      result += colors.bold(colors.italic(black(functionName)));
+    } else {
+      result += getFileLocation(callSite, internal);
+      return result;
+    }
+
+    result += ` ${black("(")}${getFileLocation(callSite, internal)}${
+      black(")")
+    }`;
+    return result;
+  }
+
+  function evaluateCallSite(callSite) {
+    return {
+      this: callSite.getThis(),
+      typeName: callSite.getTypeName(),
+      function: callSite.getFunction(),
+      functionName: callSite.getFunctionName(),
+      methodName: callSite.getMethodName(),
+      fileName: callSite.getFileName(),
+      lineNumber: callSite.getLineNumber(),
+      columnNumber: callSite.getColumnNumber(),
+      evalOrigin: callSite.getEvalOrigin(),
+      isToplevel: callSite.isToplevel(),
+      isEval: callSite.isEval(),
+      isNative: callSite.isNative(),
+      isConstructor: callSite.isConstructor(),
+      isAsync: callSite.isAsync(),
+      isPromiseAll: callSite.isPromiseAll(),
+      promiseIndex: callSite.getPromiseIndex(),
+    };
+  }
+
+  function prepareStackTrace(
+    error,
+    callSites,
+  ) {
+    const mappedCallSites = callSites.map(
+      (callSite) => {
+        const fileName = callSite.getFileName();
+        const lineNumber = callSite.getLineNumber();
+        const columnNumber = callSite.getColumnNumber();
+        if (fileName && lineNumber != null && columnNumber != null) {
+          return patchCallSite(
+            callSite,
+            opApplySourceMap({
+              fileName,
+              lineNumber,
+              columnNumber,
+            }),
+          );
+        }
+        return callSite;
+      },
+    );
+    Object.defineProperties(error, {
+      __callSiteEvals: { value: [], configurable: true },
+      __formattedFrames: { value: [], configurable: true },
+    });
+    for (const callSite of mappedCallSites) {
+      error.__callSiteEvals.push(Object.freeze(evaluateCallSite(callSite)));
+      const isInternal = callSite.getFileName()?.startsWith("$deno$") ?? false;
+      error.__formattedFrames.push(callSiteToString(callSite, isInternal));
+    }
+    Object.freeze(error.__callSiteEvals);
+    Object.freeze(error.__formattedFrames);
+    return (
+      `${error.name}: ${error.message}\n` +
+      error.__formattedFrames
+        .map((s) => `    at ${colors.stripColor(s)}`)
+        .join("\n")
+    );
+  }
+
+  function setPrepareStackTrace(ErrorConstructor) {
+    ErrorConstructor.prepareStackTrace = prepareStackTrace;
+  }
+
+  internals.exposeForTest("setPrepareStackTrace", setPrepareStackTrace);
+
+  window.__bootstrap.errorStack = {
+    setPrepareStackTrace,
+    opApplySourceMap,
+    opFormatDiagnostics,
+  };
+})(this);