Watch mode logs lower case file name for newly added file

[Prinzhorn]

This is just a minor bug I just noticed, but maybe this has some bigger consequences (why would esbuild use the lower case name at all? Even for caching, my file system is case sensitive)

I added an import to a non-existant file EditRawResponse.svelte. Then I added the file. Esbuild will then log the added file name as lower case. Editing the file and saving it again logs the correct file name. This is on 0.14.51

✘ [ERROR] Could not resolve "./EditRawResponse.svelte"

    components/FlowDetails.svelte:62:28:
      62 │ import EditRawResponse from './EditRawResponse.svelte';
         ╵                             ~~~~~~~~~~~~~~~~~~~~~~~~~~

2 errors
[watch] build finished
[watch] build started (change: "components/editrawresponse.svelte")  <============== Why is this lower case?
[watch] build finished
[watch] build started (change: "components/EditRawResponse.svelte")

[evanw]

I think I can fix this aesthetically. But it's important to know that internally esbuild uses case-insensitive file names on all platforms. This is for cross-platform portability since case-insensitivity is common on both macOS and Windows. It would be bad for a build on a case-sensitive file system to suddenly fail on a case-insensitive file system. For example, this prevents CI from passing on Linux only for the build to fail on macOS.

[Prinzhorn]

Thanks!