Age | Commit message (Collapse) | Author |
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once a string has been forced we already have dynamic storage allocated for it,
so we can easily reuse that storage instead of copying.
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- Make passing the position to `forceValue` mandatory,
this way we remember people that the position is
important for better error messages
- Add pos to all `forceValue` calls
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It does not operate on a derivation and does not return a
derivation path. Instead it works at the language level,
where a distinct term "package" is more appropriate to
distinguish the parent object of `meta.position`; an
attribute which doesn't even make it into the derivation.
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Signed-off-by: Pamplemousse <xav.maso@gmail.com>
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The attrError variable is no longer used but still allocated on every
call to the findAlongAttrPath function.
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E.g.
$ nix edit .#nixosConfigurations.bla
now works.
(cherry picked from commit d2032edb2f86e955a8a7724a27c0c3225f386500)
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(cherry picked from commit 0b013a54dc570395bed887369f8dd622b8ce337b)
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(cherry picked from commit 6b0ca8e803710342af70e257935724c5ad84ca04)
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extract the derivation to filename:lineno heuristic
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Relevant RFC: NixOS/rfcs#4
$ ag -l | xargs sed -i -e "/\"/s/’/'/g;/\"/s/‘/'/g"
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This reverts commit f78126bfd6b6c8477fcdbc09b2f98772dbe9a1e7. There
really is no need for such a massive change...
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The value pointers of lists with 1 or 2 elements are now stored in the
list value itself. In particular, this makes the "concatMap (x: if
cond then [(f x)] else [])" idiom cheaper.
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This is requires if you have attribute names with dots in them. So
you can now say:
$ nix-instantiate '<nixos>' -A 'config.systemd.units."postgresql.service".text' --eval-only
Fixes #151.
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We don't have any other kind of sets so calling them attribute sets is
unnecessarily verbose.
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This prevents some duplicate evaluation in nix-env and
nix-instantiate.
Also, when traversing ~/.nix-defexpr, only read regular files with the
extension .nix. Previously it was reading files like
.../channels/binary-caches/<name>. The only reason this didn't cause
problems is pure luck (namely, <name> shadows an actual Nix
expression, the binary-caches files happen to be syntactically valid
Nix expressions, and we iterate over the directory contents in just
the right order).
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http://hydra.nixos.org/build/2213576
Not sure why compilation doesn't fail on other platforms...
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tree). This saves a lot of memory. The vector should be sorted so
that names can be looked up using binary search, but this is not the
case yet. (Surprisingly, looking up attributes using linear search
doesn't have a big impact on performance.)
Memory consumption for
$ nix-instantiate /etc/nixos/nixos/tests -A bittorrent.test --readonly-mode
on x86_64-linux with GC enabled is now 185 MiB (compared to 946
MiB on the trunk).
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a pointer to a Value, rather than the Value directly. This improves
the effectiveness of garbage collection a lot: if the Value is
stored inside the set directly, then any live pointer to the Value
causes all other attributes in the set to be live as well.
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values. This improves sharing and gives another speed up.
Evaluation of the NixOS system attribute is now almost 7 times
faster than the old evaluator.
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efficiently. The symbol table ensures that there is only one copy
of each symbol, thus allowing symbols to be compared efficiently
using a pointer equality test.
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finished yet.
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* Optimise header file usage a bit.
* Compile the parser as C++.
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foo.nix -A attr --arg name value" will work if (name, value) is
needed in the evaluation leading up to "attr".
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to functions from the command line.
* nix-build: started removing backticks.
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and put it into a separate function findAlongAttrPath().
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