Always use os-release rather than /lib to detect NixOS (bootstrap)
#115090
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You also need to adjust https://github.com/rust-lang/rust/blob/master/src/bootstrap/download.rs#L100-L108 with the same changes
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[Two users over on zulip](https://rust-lang.zulipchat.com/#narrow/stream/122651-general/topic/Bootstrapping.20on.20NixOS) bumped into issues where NixOS wasn't being properly detected. I believe this was caused by the presence of `/lib` on their machines. `/lib` is not standard on NixOS but can still be created by users or scripts. We are already checking `/etc/os-release`. The presence of `ID=nixos` in it's output should be trustworthy and we shouldn't then go on to also check for `/lib`.
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os-release rather than /lib to detect NixOS (bootstrap.py)os-release rather than /lib to detect NixOS (bootstrap)
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…mpiler-errors Rollup of 6 pull requests Successful merges: - rust-lang#114959 (fix rust-lang#113702 emit a proper diagnostic message for unstable lints passed from CLI) - rust-lang#115011 (Warn on elided lifetimes in associated constants (`ELIDED_LIFETIMES_IN_ASSOCIATED_CONSTANT`)) - rust-lang#115077 (Do not emit invalid suggestion in E0191 when spans overlap) - rust-lang#115087 (Add disclaimer on size assertion macro) - rust-lang#115090 (Always use `os-release` rather than `/lib` to detect `NixOS` (bootstrap)) - rust-lang#115101 (triagebot: add dependency licensing pings) r? `@ghost` `@rustbot` modify labels: rollup
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Two users over on zulip bumped into issues where NixOS wasn't being properly detected.
I believe this was caused by the presence of
/libon their machines./libis not standard on NixOS but can still be created by users or scripts.We are already checking
/etc/os-release. The presence ofID=nixosin it's output should be trustworthy and we shouldn't then go on to also check for/lib.