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Author SHA1 Message Date
Johannes Kirschbauer bb9da33c62
lib/*: fix docs to use "returns" instead of "return" (#442388) 2025-10-06 08:09:54 +00:00
NAHO 6177c4ad72
lib: remove optional builtins prefixes from prelude functions 
Remove optional builtins prefixes from prelude functions by running:

    builtins=(
      abort
      baseNameOf
      break
      derivation
      derivationStrict
      dirOf
      false
      fetchGit
      fetchMercurial
      fetchTarball
      fetchTree
      fromTOML
      import
      isNull
      map
      null
      placeholder
      removeAttrs
      scopedImport
      throw
      toString
      true
    )

    fd --type file . lib --exec-batch sed --in-place --regexp-extended "
      s/\<builtins\.($(
        printf '%s\n' "${builtins[@]}" |
          paste --delimiter '|' --serial -
      ))\>/\1/g
    "

    nix fmt
 2025-09-30 09:02:59 +02:00
Felix Buehler 06ac3fbebd lib/*: fix docs to use "returns" instead of "return" 2025-09-12 16:16:41 +02:00
Wolfgang Walther 399136b3d7
lib/attrsets: add mapAttrsToListRecursive(Cond) function (#395160) 2025-09-08 19:12:59 +00:00
Wolfgang Walther bf4b47abc7
lib.attrsets.unionOfDisjoint: simplify explanation 
The whole business of `// z` is a confusing implementation detail for
the reader.
 2025-09-01 16:52:54 +02:00
Plume 0477b30ab6
lib.attrsets.genAttrs': init (#436434) 
* lib.attrsets.genAttrs': init

* lib.attrsets.genAttrs: rewrite with lib.attrsets.genAttrs'

* lib.attrsets.{genAttrs,genAttrs'}: add tests

* Update lib/attrsets.nix

Co-authored-by: Johannes Kirschbauer <hsjobeki+github@gmail.com>

* Update lib/attrsets.nix

Co-authored-by: Johannes Kirschbauer <hsjobeki+github@gmail.com>

* lib.attrsets.genAttrs': document and test attrName collision

---------

Co-authored-by: Johannes Kirschbauer <hsjobeki+github@gmail.com>
 2025-09-01 11:58:28 +02:00
Mikael Voss e5ac84e29c
lib/attrsets: add mapAttrsToListRecursive(Cond) function 2025-08-31 12:11:43 +02:00
jefrwld 37c19df121 lib.attrsets: fix typo in attrVals documentation: 'attribitue' -> 'attribute' 2025-08-12 19:42:37 +02:00
Robert Hensing 77c2981a7d lib.attrsets.filterAttrs: Add tips to doc 2025-07-27 15:39:35 +02:00
Léana 江 a2f1023f57
doc: fix example consistency on mapAttrsRecursiveCond 
The example should take a two argument function `f`.
 2025-06-22 15:26:07 +02:00
Peder Bergebakken Sundt c77ac9dfc3 treewide: fix typos 2025-06-02 16:07:07 +02:00
ccicnce113424 4551258940 lib: refactor lib.attrsets.{mapAttrs', mapAttrsToList} and mapAttrs'' in the strongswan-swanctl module 
The new implementation of `mapAttrsToList` is simpler than the previous one, avoiding an extra string conversion. Benchmarking shows a slight performance improvement. See the discussion here: https://discourse.nixos.org/t/another-implementation-of-mapattrstolist

Additionally, I searched nixpkgs for expressions equivalent to the old `mapAttrsToList` and replaced them with direct calls to the new implementation.
 2025-05-08 13:58:54 +08:00
Silvan Mosberger 3ca8b685c8 lib.getAttrFromPath: fix docs 2025-04-22 23:39:18 +02:00
Silvan Mosberger 374e6bcc40 treewide: Format all Nix files 
Format all Nix files using the officially approved formatter,
making the CI check introduced in the previous commit succeed:

  nix-build ci -A fmt.check

This is the next step of the of the [implementation](https://github.com/NixOS/nixfmt/issues/153)
of the accepted [RFC 166](https://github.com/NixOS/rfcs/pull/166).

This commit will lead to merge conflicts for a number of PRs,
up to an estimated ~1100 (~33%) among the PRs with activity in the past 2
months, but that should be lower than what it would be without the previous
[partial treewide format](https://github.com/NixOS/nixpkgs/pull/322537).

Merge conflicts caused by this commit can now automatically be resolved while rebasing using the
[auto-rebase script](8616af08d9/maintainers/scripts/auto-rebase).

If you run into any problems regarding any of this, please reach out to the
[formatting team](https://nixos.org/community/teams/formatting/) by
pinging @NixOS/nix-formatting.
 2025-04-01 20:10:43 +02:00
Daniel Flanagan 208049c89c
docs(lib): fix weird structures in attrsets docstrings 2025-02-14 23:04:58 -06:00
Silvan Mosberger 5690833b4f
lib: improve filterAttrs (#345547) 2024-11-01 11:54:20 +01:00
Robert Hensing 1de8e07216 lib: refactor filterAttrs 
`filter` is a primop which is designed for this task, and it saves
the allocation of some singleton lists here.
 2024-10-31 16:30:07 +01:00
h7x4 c7c30eb452
lib: improve filterAttrs 
Co-authored-by: Silvan Mosberger <contact@infinisil.com>
 2024-10-25 15:07:12 +02:00
Robert Hensing 729225e355 treewide: lib.isInOldestRelease -> lib.oldestSupportedReleaseIsAtLeast 2024-10-08 11:14:24 +02:00
Someone Serge 98384afab5 lib: add getStatic 2024-07-21 11:38:04 +00:00
Someone Serge 76db6ba81a lib: reflect effective signatures of getOutput functions 2024-07-21 11:37:38 +00:00
Someone Serge 744305bce4 lib: add getOutput', a nix-lang counterpart of _overrideFirst 2024-07-21 11:29:23 +00:00
Silvan Mosberger 56535c832f lib.intersectAttrs: Export from builtins 2024-06-20 17:59:36 +02:00
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