1 files changed, 79 insertions, 0 deletions
diff --git a/cli/js/errors.ts b/cli/js/errors.ts
new file mode 100644
index 000000000..02ddfa2f2
--- /dev/null
+++ b/cli/js/errors.ts
@@ -0,0 +1,79 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+
+/** A Deno specific error.  The `kind` property is set to a specific error code
+ * which can be used to in application logic.
+ *
+ *       try {
+ *         somethingThatMightThrow();
+ *       } catch (e) {
+ *         if (
+ *           e instanceof Deno.DenoError &&
+ *           e.kind === Deno.ErrorKind.Overflow
+ *         ) {
+ *           console.error("Overflow error!");
+ *         }
+ *       }
+ *
+ */
+export class DenoError<T extends ErrorKind> extends Error {
+  constructor(readonly kind: T, msg: string) {
+    super(msg);
+    this.name = ErrorKind[kind];
+  }
+}
+
+// Warning! The values in this enum are duplicated in cli/msg.rs
+// Update carefully!
+export enum ErrorKind {
+  NoError = 0,
+  NotFound = 1,
+  PermissionDenied = 2,
+  ConnectionRefused = 3,
+  ConnectionReset = 4,
+  ConnectionAborted = 5,
+  NotConnected = 6,
+  AddrInUse = 7,
+  AddrNotAvailable = 8,
+  BrokenPipe = 9,
+  AlreadyExists = 10,
+  WouldBlock = 11,
+  InvalidInput = 12,
+  InvalidData = 13,
+  TimedOut = 14,
+  Interrupted = 15,
+  WriteZero = 16,
+  Other = 17,
+  UnexpectedEof = 18,
+  BadResource = 19,
+  CommandFailed = 20,
+  EmptyHost = 21,
+  IdnaError = 22,
+  InvalidPort = 23,
+  InvalidIpv4Address = 24,
+  InvalidIpv6Address = 25,
+  InvalidDomainCharacter = 26,
+  RelativeUrlWithoutBase = 27,
+  RelativeUrlWithCannotBeABaseBase = 28,
+  SetHostOnCannotBeABaseUrl = 29,
+  Overflow = 30,
+  HttpUser = 31,
+  HttpClosed = 32,
+  HttpCanceled = 33,
+  HttpParse = 34,
+  HttpOther = 35,
+  TooLarge = 36,
+  InvalidUri = 37,
+  InvalidSeekMode = 38,
+  OpNotAvailable = 39,
+  WorkerInitFailed = 40,
+  UnixError = 41,
+  NoAsyncSupport = 42,
+  NoSyncSupport = 43,
+  ImportMapError = 44,
+  InvalidPath = 45,
+  ImportPrefixMissing = 46,
+  UnsupportedFetchScheme = 47,
+  TooManyRedirects = 48,
+  Diagnostic = 49,
+  JSError = 50
+}