Don't implement NixPath for Option<&P> where P: NixPath
#1242
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Most Nix functions that accept `NixPath` arguments can't do anything useful with `None`. The exceptions (`mount` and `quotactl_sync`) already take explicitly optional arguments. Also, this changes the behavior of `mount` with `None` arguments. Previously, it would call mount(2) with empty strings for those arguments. Now, it will use null pointers.
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Supersedes #1236 |
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Can confirm it works as expected: |
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bors r+ |
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May 17, 2020
1242: Don't implement `NixPath` for `Option<&P> where P: NixPath` r=asomers a=asomers Most Nix functions that accept `NixPath` arguments can't do anything useful with `None`. The exceptions (`mount` and `quotactl_sync`) already take explicitly optional arguments. Also, this changes the behavior of `mount` with `None` arguments. Previously, it would call mount(2) with empty strings for those arguments. Now, it will use null pointers. Co-authored-by: Alan Somers <asomers@gmail.com>
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Most Nix functions that accept
NixPatharguments can't do anythinguseful with
None. The exceptions (mountandquotactl_sync)already take explicitly optional arguments.
Also, this changes the behavior of
mountwithNonearguments.Previously, it would call mount(2) with empty strings for those
arguments. Now, it will use null pointers.