fix(waku/router): regex in file replacement to correctly handle all matches (fs-router)

[daanlenaerts]

The current fs-router regex, /(^|\/|\\)_([^/]+)_(\/|\\|\.)/g, which is ran during build only replaces the first occurrence of underscores in scenarios where multiple underscore-surrounded segments are separated by single slashes. For example, in the string "app/_propertyId_/_surveyPartKey_.js", only _propertyId_ was being replaced, but _surveyPartKey_ was left unchanged due to the / being consumed during the first match.

This can easily be checked by running the following code:

const file = "app/_propertyId_/_surveyPartKey_.js";
console.log(file.replace(/(^|\/|\\)_([^/]+)_(\/|\\|\.)/g, '$1[$2]$3'));
// app/[propertyId]/_surveyPartKey_.js

Solution

The regex has been updated to /(?<=^|\/|\\)_([^/]+)_(?=\/|\\|\.)/g. This uses positive lookbehind (?<=^|\/|\\) and lookahead (?=\/|\\|\.) assertions to check for preceding and succeeding characters without consuming them. This allows every instance of the pattern to be replaced, regardless of their position in the string.

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Name	Status	Preview	Updated (UTC)
waku	✅ Ready (Inspect)	Visit Preview	Apr 27, 2024 11:45am

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[daanlenaerts]

No worries, thanks for merging it!