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Add date nanoseconds portability note to docs

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Juno Takano 2024-06-28 08:48:41 -03:00
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docs/portability.md
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@ -13,6 +13,7 @@ Below is a list of assumptions made about what your system supports:
- `find`
- `sed`
- `date` with nanoseconds as `%N`
- While nanoseconds support in `date` is not in the POSIX 2017 standard, it is used only when `$DEBUG` is set in the environment and is available on the currently supported systems (FreeBSD, Void Linux) and on the next operating system with planned support (Debian).
- `env` at `/usr/bin/env`
- While this may be an issue from a portability standpoint, hardcoding the path where `sh` is also poses another portability issue. A more robust way to find it would be desirable.