The impending release of macOS 15 Sequoia will break many existing nix
installs on macOS, which may lead to an increased number of people who
are looking to try to reinstall Nix without noticing the open/pinned
issue (#10892) that explains the problem and outlines how to migrate
existing installs.
These admonitions are a short-term measure until we are over the hump
and support volumes dwindle.
This reverts commit 43e82c9446, reversing
changes made to d79b9bdec0.
Since /proc/homeless-shelter returns a different errno than /homeless-shelter (ENOENT vs EACCES), we need to revert this change.
Software depends on this error code i.e. cargo and therefore breaks.
Incorrectly high expectations lead to frustration for users who
stick around to experience how useless it is for e.g. a devShell
https://functional.cafe/@arianvp/112976284363120036:
> Flakes doesn't have eval caching. It has command line argument
> caching. It literally just stores the cli argument you passed
> in a sqlite database and yes that's as useless as it sounds
> When I discovered flakes had no expression level caching whatsoever
> I kind of felt lied to and betrayed.
This wasn't the default behaviour because:
> We don't enable this by default to avoid the mostly unnecessary work of
> performing an additional build of the package in cases where we build
> the package normally anyway, such as in our pre-merge CI.
Since we have a componentized build, we've solved the duplication.
In the new situation, building both with and without unit tests
isn't any slow than just a build with unit tests, so there's no
point in using the unit-tested build anymore.
By using the otherwise untested build, we reduce the minimum build
time towards the NixOS test, at no cost.
If you want to run all tests, build all attributes.
* add cross-references to `nix-path` overriding
while this information is already present in the settings, it's more
likely to be first accessed through the "lookup path" page, which
currently requires following two links to get to the practically
important bits.
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
* docs: unify documentation on search paths
- put all the information on search path semantics into `builtins.findFile`
- put all the information on determining the value of `builtins.nixPath` into the
`nix-path` setting
maybe `builtins.nixPath` is a better place for this, but those bits
can still be moved around now that it's all next to each other.
- link to the syntax page for lookup paths from all places that are
concerned with it
- add or clarify examples
- add a test verifying a claim from documentation
* manual: Contributing -> Development, Hacking -> Building
what's currently called "hacking" are really instructions for setting up
a development environment and compiling from source. we have
a contribution guide in the repo (which rightly focuses on GitHub
workflows), and the material in the manual is more about working
on the code itself.
since we'd otherwise have three headings that amount to "Building Nix",
this change also moves the "classic Nix" instructions to the top.
we may want to reorganise this in the future, and bring
contributor-oriented information closer to the code, but for now let's
stick to more accurate names to ease navigation.
