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Copies part of the changes of ac89bb064aeea85a62b82a6daf0ecca7190a28b7
Change-Id: I9ce601875cd6d4db5eb1132d7835c5bab9f126d8
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- Greatly expand API docs
- Clean up code in misc ways
- Instead of a complicated single loop on generations, do different
operations in successive subsequent steps.
- Avoid `ref` in one place where `&` is fine
- Just return path instead of mutating an argument in `makeName`
Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
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Make it look into the new-style profiles dir, the old-style one, and the
target of `~/.nix-profile` to be sure that we don't miss anything
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Low-hanging fix for https://github.com/NixOS/nix/pull/5226#issuecomment-1454669399
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Signed-off-by: Anders Kaseorg <andersk@mit.edu>
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I should have done this to begin with. This will be nicer once more
Store sub-interfaces exist too, to illustrate the pattern.
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Starts progress on #5729.
The idea is that we should not have these default methods throwing
"unimplemented". This is a small step in that direction.
I kept `addTempRoot` because it is a no-op, rather than failure. Also,
as a practical matter, it is called all over the place, while doing
other tasks, so the downcasting would be annoying.
Maybe in the future I could move the "real" `addTempRoot` to `GcStore`,
and the existing usecases use a `tryAddTempRoot` wrapper to downcast or
do nothing, but I wasn't sure whether that was a good idea so with a
bias to less churn I didn't do it yet.
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Also use std::string_view in a few more places.
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This is technically a breaking change, since attempting to set plugin
files after the first non-flag argument will now throw an error. This
is acceptable given the relative lack of stability in a plugin
interface and the need to tie the knot somewhere once plugins can
actually define new subcommands.
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This was useful for an experiment with building Nix as a single
compilation unit. It's not very useful otherwise but also doesn't
hurt...
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(cherry picked from commit 2c692a3b144523bca68dd6de618124ba6c9bb332)
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These are all symlinks to 'nix' now, reducing the installed size by
about ~1.7 MiB.
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All plugins in plugin-files will be dlopened, allowing them to
statically construct instances of the various Register* types Nix
supports.
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Also, move a few free-standing functions into StoreAPI and Derivation.
Also, introduce a non-nullable smart pointer, ref<T>, which is just a
wrapper around std::shared_ptr ensuring that the pointer is never
null. (For reference-counted values, this is better than passing a
"T&", because the latter doesn't maintain the refcount. Usually, the
caller will have a shared_ptr keeping the value alive, but that's not
always the case, e.g., when passing a reference to a std::thread via
std::bind.)
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Fixes #609.
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Don't barf trying to read a link that just got deleted.
Fixes #575.
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Also, make sure --delete-older-than doesn't delete the current
generation.
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And don't try to delete generations from unwritable directories.
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The call to nix-env expects a string which represents how old the
derivations are or just "old" which means any generations other than
the current one in use. Currently nix-collect-garbage passes an empty
string to nix-env when using the -d option. This patch corrects the call
to nix-env such that it follows the old behavior.
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