Feature request: Qualified subdirectories (directory-based module namespaces)
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Read the existing recursive source scanning behavior described in the issue and the related proposals #1974, #1805, and #2459. The issue does not name implementation files or tests; first locate where subdirs: true is handled in the compiler and review its module naming rules. Done means an opt-in qualified mode supports the shown directory hierarchy and duplicate filenames while preserving the default behavior.
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描述
Feature request: Qualified subdirectories (directory-based module namespaces)
Hi! I've been using ReScript a bit in my free time recently, and have been really enjoying it. However I've found it quite difficult/frustrating to organize code/packages using ReScript's existing tooling (even when using the "monorepo" features).
I'd like to propose an opt-in feature similar to Dune's (include_subdirs qualified), where source directories automatically become part of the ReScript module hierarchy.
For example, given:
src/
App.res
Components/
Button.res
Input.res
Admin/
Button.res
App.res could reference Components.Button, Components.Input, and Admin.Button.
This would provide two benefits:
- Better code organization: Module hierarchies could mirror the filesystem without manually creating wrapper modules.
- Duplicate filenames: Files such as
Components/Button.resandAdmin/Button.rescould coexist without module-name collisions.
Currently, recursive source scanning (subdirs: true) places all files in a flat module namespace.
Ideally, this would be an opt-in configuration (perhaps subdirs: "qualified"), preserving existing behavior by default. Directory modules could be implemented using compile-time aliases, without introducing additional JavaScript runtime wrappers.
Related issues
- [#1974 — Allow duplicate filenames / path-derived module names](https://github.com/rescript-lang/rescript/issues/1974): Closely related proposal, including examples like
Pages__Index. - [#1805 — Namespace proposal](https://github.com/rescript-lang/rescript/issues/1805): Earlier work on package-level namespaces.
- [#2459 — Recursive subdirectory scanning](https://github.com/rescript-lang/rescript/issues/2459): Related source-discovery functionality, but without directory qualification.
References
Thanks!
Ethan
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