Webpacker can't find subdir/image.png in manifest.json

[honzasterba]

Ruby version: 3.03
Rails version: 7.0.1
Webpacker version: 6.0.2 (same for js and gem)

Expected behavior:

• put an image file into /app/javascript/images/subdir/image.png
• use image_pack_tag "subdir/image.png" in view
• image should be found by webpacker and rendered

Actual behavior:
Error is raised: Webpacker can't find subdir/image.png in .../manifest.json

Small, reproducible repo:
https://github.com/honzasterba/packer-test

[honzasterba]

first I thought I was doing something wrong, but this just seems like a big source of incompatibility between webpacker and shakapacker

webpack-asset-manifest says: will generate a JSON file that matches the original filename with the hashed version

so maybe thats it? instead of file-path->hashed-version it generates only file-name->hashed version?

there is a difference to how to manifest used to look like with webpack5:
"media/subdir/image.png": "/packs/media/images/subdir/image-HASH.png"

now with shakapacker:
"static/image.png": "/packs-test/static/image-bd51daf42131d4298622.png"

[tomdracz]

Looks like this was open issue with rails/webpacker. For more see rails/webpacker#2956. Likely changed in rails/webpacker#2802 Need to dig into this and figure out what was the reason for this change.
It did trip me up when I was upgrading, referencing asset name without a folder seems to work but might cause some issues as outlined in the discussion at rails/webpacker above

[tomdracz]

@honzasterba Can you try out the changes in #47 and see if that fixes the issue for you?

[honzasterba]

will do!

[honzasterba]

I have checked and I can verify that #47 fixes the issue

[tomdracz]

Thanks! Need to give it few me spins but hopefully we can merge and release soon!

[justin808]

Awesome work guys!

[justin808]

I'll release 6.1.0 on Friday.