Fix catchall errors (#1802)

* Fix catchall errors on require

* Bump version

* Fix lint

Author: Elias Kassell

core/compilers.ts

@@ -16,6 +16,8 @@ const CONTEXT_FUNCTIONS = [
   .map(name => `const ${name} = ctx.${name} ? ctx.${name}.bind(ctx) : undefined;`)
   .join("\n");
 
+export const INVALID_YAML_ERROR_STRING = "is not a valid YAML file";
+
 export function compile(code: string, path: string): string {
   if (Path.fileExtension(path) === "sqlx") {
     return compileSqlx(SyntaxTreeNode.create(code), path);
@@ -26,7 +28,7 @@ export function compile(code: string, path: string): string {
       return `exports.asJson = ${JSON.stringify(yamlAsJson)}`;
     } catch (e) {
       if (e instanceof YAMLException) {
-        throw Error(`${path} is not a valid YAML file: ${e}`);
+        throw new Error(`${path} ${INVALID_YAML_ERROR_STRING}: ${e}`);
       }
       throw e;
     }

core/workflow_settings.ts

@@ -1,4 +1,7 @@
+import { YAMLException } from "js-yaml";
+
 import { verifyObjectMatchesProto, VerifyProtoErrorBehaviour } from "df/common/protos";
+import { INVALID_YAML_ERROR_STRING } from "df/core/compilers";
 import { version } from "df/core/version";
 import { dataform } from "df/protos/ts";
 
@@ -77,12 +80,14 @@ function maybeRequire(file: string): any {
     // tslint:disable-next-line: tsr-detect-non-literal-require
     return nativeRequire(file);
   } catch (e) {
-    if (e instanceof Error) {
-      if (e.message.includes("Cannot find module")) {
-        return;
-      }
+    if (e instanceof SyntaxError || e instanceof YAMLException) {
+      throw e;
     }
-    throw e;
+    // The YAMLException type isn't propogated by `require`, so instead we must check the message.
+    if (e?.message?.includes(INVALID_YAML_ERROR_STRING)) {
+      throw e;
+    }
+    return undefined;
   }
 }
 

version.bzl

@@ -1,3 +1,3 @@
 # NOTE: If you change the format of this line, you must change the bash command
 # in /scripts/publish to extract the version string correctly.
-DF_VERSION = "3.0.1"
+DF_VERSION = "3.0.2"