Test Source Map in SAP Cloud SDK

Overview

We wanted to provide a way to make the sources available for debugging. The sourceRoot property seemed to be a nice way to do that. We would put a source URL, and sources would be downloaded if needed. However, this is not working as expected. Here a minimal example using local source files:

• Uses the @sap-cloud-sdk/util package as test package which is shipped with source maps.
• In a post install the sourceRoot property is adjusted to point to remote url

Steps to reproduce

• run npm i
• run node src/debug-test.mjs in debug mode (see launch.json)
• step into the trimLeft() method of the test
• plain .js file is shown in debugger not the mapped file.

Also an error is shown:

Could not load source '/Users/XXX/WebstormProjects/source-map-test/node_modules/@sap-cloud-sdk/util/dist/https:/raw.githubusercontent.com/SAP/cloud-sdk-js/main/packages/util/src/string.ts': Unable to retrieve source content.

which indicated that the sourceRoot property is not correctly considered. According to spec it is an absolute path. Also in the sourceroot spec nothing is mentioned about a default path based on the current working directory.

I had a look at the default lib which everybody uses I guess source-map but there it also did not load the file see source-map-test.mjs. Also with the chrome debug tolls the same could not load source error appears with the paths beeing added up.

Goal

The sourceRoot should work like expected also with a remote URL in VSC.