Having a fallback when an ENV variable does not exist for `interpolate-folder-path` about rust-embed HOT 4 CLOSED

Additionally, I would try to avoid having any logic in the folder string. That kind of thing should be in your build.rs script.

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I recommend using the built-in functionality of https://doc.rust-lang.org/cargo/reference/build-scripts.html (or [env] as you suggested), especially if you need logic around the folder path.

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Have you tried setting the env variable in your build.rs script? I think the current behavior is good because it's explicit.

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Well I guess for my use case I can also use [env] in my Cargo config as that would fix it. But still it would be nice if an folder does not exist it wouldn't panic but you can silently ignore it so the Content in this case would just be empty as well. The issue can be closed though if you don't agree

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