Symfony version(s) affected

6.4

Description

MappedAssetFactory->isVendor() return true when the directory is missing, which leads to unexpected behaviours.

For some reason, str_starts_with('/app/assets/javascript/site_chart.js', null) returns true, so AssetMapper thinks that one file is in the vendor/ directory when it is not.

3v4l: https://3v4l.org/iZfv4

How to reproduce

Try to use https://github.com/sensiolabs/minify-bundle while the directory assets/vendor doesn't exist: sensiolabs/minify-bundle#17 (comment)

Possible Solution

Refactor isVendor() to handle this case.

Additional Context

I don't know yet if assets/vendor/ should or must be created by some automation (bin/console assets:install, bin/console asset-map:compile, or Symfony's recipes?) , but assets/vendor/ is added to .gitignore by the recipes: https://github.com/symfony/recipes/blob/21ffab22d3d8641e626b52bbabc435b690dde218/symfony/asset-mapper/6.4/manifest.json#L10 so it looks like it's possible to miss this directory.