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112 Commits

Author SHA1 Message Date
Silvan Mosberger
cf482ce70a lib.intersectAttrs: Export from builtins 
(cherry picked from commit 56535c832f)
 2024-06-20 17:57:28 +00:00
Gabriel Volpe
fe2bead78b
lib/attrsets: introduce mapCartesianProduct 2024-04-15 19:16:15 +02:00
Gabriel Volpe
228621e42d
lib/attrsets: rename cartesianProductOfSets to cartesianProduct 2024-04-15 19:03:54 +02:00
Tharun Thennarasu
5bcb08ea03
lib.hasAttrByPath: fix typo (#302042) 2024-04-06 11:24:44 +02:00
Daniel Sidhion
d784fc138d Apply suggestions from code review 2024-03-19 18:03:31 -07:00
Johannes Kirschbauer
56b5634a90
doc: manual fixup after migration 2024-03-19 22:01:38 +01:00
Johannes Kirschbauer
f917ed536b
doc: migrate lib.attrsets to use doc-comments 2024-03-15 17:18:35 +01:00
Silvan Mosberger
012faf046f
Merge pull request #292941 from adisbladis/lib-getattrfrompath-env 
lib.getAttrFromPath: Don't use errorMessage variable
 2024-03-06 19:41:34 +01:00
Silvan Mosberger
2dc95cded0
Merge pull request #292938 from adisbladis/mapattrsrecursivecond-env 
lib.mapAttrsRecursiveCond: Eliminate intermediate one intermediate variable environment
 2024-03-06 19:40:52 +01:00
Silvan Mosberger
b180a6af30
Merge pull request #292937 from adisbladis/zipattrs-env 
lib.zipAttrs: Remove needless function wrapping
 2024-03-06 19:39:48 +01:00
Silvan Mosberger
0d49917ded
Merge pull request #292934 from adisbladis/lib-choosedevoutput 
lib.chooseDevOutputs: Remove needless function wrapping
 2024-03-06 19:39:30 +01:00
Valentin Gagarin
73c0b48dd6
doc: add details on mapAttrsRecursive[Cond] (#293509) 
* doc: add details on `mapAttrsRecursive[Cond]`

from first reading it wasn't clear that `f` also takes the current
attribute path. also the value f receives is tricky due to how the
condition is evaluated.

Co-authored-by: Daniel Sidhion <DanielSidhion@users.noreply.github.com>
 2024-03-06 10:21:23 +01:00
adisbladis
948e5b841d lib.getAttrFromPath: Don't use errorMessage variable 
We can just pass the error message on without creating an environment.
 2024-03-03 16:30:00 +13:00
adisbladis
34fefe4e16 lib.mapAttrsRecursiveCond: Eliminate intermediate one intermediate variable environment 2024-03-03 16:18:38 +13:00
adisbladis
4338bfde09 lib.zipAttrs: Remove needless function wrapping 
Returning the partially applied `zipAttrsWith fn` is the same as `sets: zipAttrsWith fn sets`.
 2024-03-03 16:17:49 +13:00
adisbladis
3ee9d185f3 lib.chooseDevOutputs: Remove needless function wrapping 
Returning the partially applied `map getDev` is the same as `drvs: map getDev drvs`.
 2024-03-03 16:03:01 +13:00
Silvan Mosberger
31d23ba418 lib.attrsets: Remove unneeded polyfills 
Nix 2.3 (the minimum version needed to evaluate Nixpkgs) supports these, so no need to keep them around.
 2024-02-09 05:46:03 +01:00
Alois Wohlschlager
d33127863e
lib: make deprecation warnings consistent 
The deprecation warnings in lib were wildly inconsistent. Different
formulations were used in different places for the same meaning. Some warnings
used builtins.trace instead of lib.warn, which prevents silencing; one even
only had a comment instead. Make everything more uniform.
 2024-02-03 19:01:39 +01:00
Robert Hensing
a7aa95db53 lib/attrsets: Document and link Nix language operators 2023-12-13 18:38:41 +01:00
Robert Hensing
7d993b9521 lib.attrsets.hasAttrByPath: Document law and laziness, and test it 2023-12-08 23:19:09 +01:00
Robert Hensing
72bd4bbb58 lib.attrsets.longestValidPathPrefix: init 
Allows finding the most specific path that exists.
This is useful for error messages relating to attribute paths.
 2023-12-08 23:15:13 +01:00
Robert Hensing
51357572f2
Merge pull request #269552 from adisbladis/lib-matchattrs-list-allocs 
lib.attrsets.matchAttrs: Avoid some list allocations when walking structure
 2023-11-27 14:44:37 +01:00
adisbladis
544a1d375b lib.attrsets.attrByPath: Don't allocate one extra list per lookup recursion 
Using `tail` in a recursive loop like this needlessly allocates.
This changes the loop to look up by list index instead.
 2023-11-27 11:37:57 +13:00
adisbladis
7e07b3ecd5 lib.attrsets.hasAttrByPath: Don't allocate one extra list per lookup recursion 
Using `tail` in a recursive loop like this needlessly allocates.
This changes the loop to look up by list index instead.
 2023-11-27 11:37:56 +13:00
adisbladis
013a0a1357 lib.attrsets.matchAttrs: Avoid some list allocations when walking structure 
Benchmarks (`nix-instantiate ./. -A python3`):

- Before:
``` json
{
  "cpuTime": 0.29049500823020935,
  "envs": {
    "bytes": 4484216,
    "elements": 221443,
    "number": 169542
  },
  "gc": {
    "heapSize": 402915328,
    "totalBytes": 53086800
  },
  "list": {
    "bytes": 749424,
    "concats": 4242,
    "elements": 93678
  },
  "nrAvoided": 253991,
  "nrFunctionCalls": 149848,
  "nrLookups": 49612,
  "nrOpUpdateValuesCopied": 1587837,
  "nrOpUpdates": 10104,
  "nrPrimOpCalls": 130356,
  "nrThunks": 358981,
  "sets": {
    "bytes": 30423600,
    "elements": 1859999,
    "number": 41476
  },
  "sizes": {
    "Attr": 16,
    "Bindings": 16,
    "Env": 16,
    "Value": 24
  },
  "symbols": {
    "bytes": 236145,
    "number": 24453
  },
  "values": {
    "bytes": 10502520,
    "number": 437605
  }
}
```

- After:
``` json
{
  "cpuTime": 0.2946169972419739,
  "envs": {
    "bytes": 3315224,
    "elements": 172735,
    "number": 120834
  },
  "gc": {
    "heapSize": 402915328,
    "totalBytes": 48718432
  },
  "list": {
    "bytes": 347568,
    "concats": 4242,
    "elements": 43446
  },
  "nrAvoided": 173252,
  "nrFunctionCalls": 101140,
  "nrLookups": 73595,
  "nrOpUpdateValuesCopied": 1587837,
  "nrOpUpdates": 10104,
  "nrPrimOpCalls": 83067,
  "nrThunks": 304216,
  "sets": {
    "bytes": 29704096,
    "elements": 1831673,
    "number": 24833
  },
  "sizes": {
    "Attr": 16,
    "Bindings": 16,
    "Env": 16,
    "Value": 24
  },
  "symbols": {
    "bytes": 236145,
    "number": 24453
  },
  "values": {
    "bytes": 8961552,
    "number": 373398
  }
}
```
 2023-11-27 11:20:50 +13:00
Silvan Mosberger
055ba65fed lib: Take advantage of section descriptions 
See https://github.com/nix-community/nixdoc/releases/tag/v2.6.0
 2023-11-20 03:02:11 +01:00
Silvan Mosberger
5323fbf703
Merge pull request #254452 from flyingcircusio/lib-attrsToList 
lib.attrsets.attrsToList: add function
 2023-10-10 19:49:17 +02:00
Oliver Schmidt
d70633f91c lib.attrsets.attrsToList: add function 
For transforming back between lists and attrsets, it makes sense to have
a quasi-inverse of `builtins.listToAttrs` available as a library
function.

Co-authored-by: Silvan Mosberger <github@infinisil.com>
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
 2023-10-10 16:11:01 +02:00
Silvan Mosberger
dd72ff27f7 lib.attrsets.foldlAttrs: Make stricter 
See the parent commit for the same change to lib.lists.foldl'
 2023-09-27 02:43:59 +02:00
Silvan Mosberger
3b6169f87b lib.lists.foldl': Make strict in the initial accumulator 
To maintain backwards compatibility, this can't be changed in the Nix language.
We can however ensure that the version Nixpkgs has the more intuitive behavior.
 2023-09-27 02:43:59 +02:00
Silvan Mosberger
fa503f4b92 lib.attrsets.mergeAttrsList: init 
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
 2023-07-18 20:27:15 +02:00
figsoda
12e01c677c lib/attrsets: remove unused let bindings 2023-06-23 09:41:04 +00:00
Robert Hensing
5319ddf7dc lib.concatMapAttrs: Simplify stack trace 2023-05-31 14:57:37 +02:00
zimbatm
ad0b21fbbc
lib: add missing removeAttrs builtin 
I'm expecting all the builtins.* functions to be available in lib.*
 2023-04-19 21:27:38 +02:00
hsjobeki
15a8d05ba5 init: lib.foldlAttrs 
- provide comprehensive example
- add unit test
 2023-03-11 10:42:00 +01:00
Colin Arnott
6ff66fcbd7
lib: standardise attrset type syntax 
There are a number of different syntaxes used for attrset type
signatures in our doc strings, this change standardises upon one that
uses :: for specifying attribute type, and ; terminators to be
consistent with nix syntax. There are no bugs in the functions
themselves, just that different syntaxes may confuse new users.
 2023-01-30 23:53:44 +00:00
Adam Joseph
a4e3e16258
Update lib/attrsets.nix 
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
 2023-01-25 02:52:54 +00:00
Adam Joseph
ee00af7a32 attrsets: clarify that mapAttrs maps over *leaf* attrs 2023-01-22 15:19:09 -08:00
YoshiRulz
7fba83890c
lib: Fix mismatched quotes in lib.* doc comments 
caused problems for automated rich text generation such as
https://teu5us.github.io/nix-lib.html#customisation-functions
 2023-01-02 08:25:17 +10:00
hsjobeki
5ff21bfc73 attrsets: fix and add some doc types 2022-12-24 14:08:11 +01:00
figsoda
695d4bc76b lib: fix typos 2022-12-17 18:59:29 -05:00
Ryan Mulligan
ac1ae0a58e doc: auto-generate asserts and attrset library docs 
If all the docs are auto-generated, it should be easier to convert
them to Commonmark.

Co-Authored-By: Valentin Gagarin <valentin.gagarin@tweag.io>
Co-Authored-By: Silvan Mosberger <contact@infinisil.com>
 2022-12-08 22:58:22 +01:00
figsoda
f993f8a186 lib/attrsets: add concatMapAttrs 2022-11-17 10:41:53 -05:00
figsoda
4536ebad69 lib/attrsets: simplify chooseDevOutputs 2022-11-17 09:41:47 -05:00
Adam Joseph
037cf2fad1 unionOfDisjoint: use builtins.intersectAttrs 
This brings two benefits:

1. The complete list of collisions is printed in the whenever any colliding
   attribute is accessed.

2. The sets are intersected using a C++ primitive, which runs in O(n) time
   (intersecting pre-sorted lists) with small constants rather than interpreted
   Nix code.

Thanks to @toonn for prompting this improvement.
 2022-09-25 00:09:15 -07:00
Adam Joseph
99da193877 note that unionOfDisjoint is commutative, unlike // 2022-09-12 12:59:16 -07:00
Adam Joseph
47de66b1a4 lib/attrsets.nix: add unionOfDisjoint 2022-09-12 12:53:31 -07:00
Robert Hensing
4d2237c841 lib.foldAttrs: Clarify example 2022-05-10 07:01:00 +02:00
Robert Hensing
5ff918bf55
Merge pull request #147077 from Infinisil/updateAttrPaths 
Introduce `lib.updateManyAttrsByPath`
 2022-03-19 19:00:03 +01:00
Silvan Mosberger
85003ecdbb lib.attrsets: Introduce updateManyAttrsByPath 2022-03-18 00:08:29 +01:00