Using rollup-plugin-external-assets results in empty source map files

[rickharris]

I put a small test case together to show the issue: https://github.com/rickharris/rollup-external-assets-sourcemap-test

The repo has two source files without-assets.js and with-assets.js, the latter imports a png. The two files have two separate rollup configs, that are identical except the one for with-assets.js uses rollup-plugin-external-assets to copy & mark the asset it imports as external.

When built, the file without-assets.js.map file has all the information you'd expect in a source map:

{"version":3,"file":"without-assets.js","sources":["../without-assets.js"],"sourcesContent":["import { log } from \"console\";\n\nlog(\"HELLO\");\n"],"names":[],"mappings":";;AAEA,GAAG,CAAC,OAAO,CAAC"}

For the file that is built with rollup-plugin-external-assets in the plugins list, the source map file is still present but lacks any actual mapping information:

{"version":3,"file":"with-assets.js","sources":[],"sourcesContent":[],"names":[],"mappings":""}

Hope this helps!

[recursive-beast]

@rickharris Fixed! Thank you for pointing this out, and also for providing an example demonstrating the issue, really appreciate it.