Title here
Summary here
Builtins
Nix builtins
Nix has a lot of built-in functions, some of which are accessible in
the global scope, and some of which are only accessible through the
global builtins attribute set.
This document is an attempt to track all of these builtins, but without documenting their functionality.
See also the Nix manual .
The impl column indicates implementation status in tvix:
- implemented: "" (empty cell)
- not yet implemented, but not blocked:
todo - not yet implemented, but blocked by other prerequisites:
store: awaiting eval<->store api(s)context: awaiting support for string contexts
| name | global | arity | pure | impl |
|---|---|---|---|---|
| abort | true | 1 | ||
| add | false | 2 | true | |
| addErrorContext | false | ? | context | |
| all | false | 2 | true | |
| any | false | 2 | true | |
| appendContext | false | ? | ||
| attrNames | false | 1 | true | |
| attrValues | false | true | ||
| baseNameOf | true | |||
| bitAnd | false | |||
| bitOr | false | |||
| bitXor | false | |||
| builtins | true | |||
| catAttrs | false | |||
| compareVersions | false | |||
| concatLists | false | |||
| concatMap | false | |||
| concatStringsSep | false | |||
| currentSystem | false | |||
| currentTime | false | false | ||
| deepSeq | false | |||
| derivation | true | store | ||
| derivationStrict | true | store | ||
| dirOf | true | |||
| div | false | |||
| elem | false | |||
| elemAt | false | |||
| false | true | |||
| fetchGit | true | store | ||
| fetchMercurial | true | store | ||
| fetchTarball | true | store | ||
| fetchurl | false | store | ||
| filter | false | |||
| filterSource | false | store | ||
| findFile | false | false | todo | |
| foldl' | false | |||
| fromJSON | false | |||
| fromTOML | true | |||
| functionArgs | false | |||
| genList | false | |||
| genericClosure | false | |||
| getAttr | false | |||
| getContext | false | |||
| getEnv | false | false | ||
| hasAttr | false | |||
| hasContext | false | |||
| hashFile | false | false | ||
| hashString | false | |||
| head | false | |||
| import | true | |||
| intersectAttrs | false | |||
| isAttrs | false | |||
| isBool | false | |||
| isFloat | false | |||
| isFunction | false | |||
| isInt | false | |||
| isList | false | |||
| isNull | true | |||
| isPath | false | |||
| isString | false | |||
| langVersion | false | |||
| length | false | |||
| lessThan | false | |||
| listToAttrs | false | |||
| map | true | |||
| mapAttrs | false | |||
| match | false | |||
| mul | false | |||
| nixPath | false | todo | ||
| nixVersion | false | |||
| null | true | |||
| parseDrvName | false | |||
| partition | false | |||
| path | false | sometimes | store | |
| pathExists | false | false | ||
| placeholder | true | context | ||
| readDir | false | false | ||
| readFile | false | false | ||
| removeAttrs | true | |||
| replaceStrings | false | |||
| scopedImport | true | |||
| seq | false | |||
| sort | false | |||
| split | false | |||
| splitVersion | false | |||
| storeDir | false | store | ||
| storePath | false | store | ||
| stringLength | false | |||
| sub | false | |||
| substring | false | |||
| tail | false | |||
| throw | true | |||
| toFile | false | store | ||
| toJSON | false | |||
| toPath | false | |||
| toString | true | |||
| toXML | true | |||
| trace | false | |||
| true | true | |||
| tryEval | false | |||
| typeOf | false | |||
| unsafeDiscardOutputDependency | false | |||
| unsafeDiscardStringContext | false | |||
| unsafeGetAttrPos | false | todo | ||
| valueSize | false | todo |
Added after C++ Nix 2.3 (without Flakes enabled)
| name | global | arity | pure | impl |
|---|---|---|---|---|
| break | false | 1 | todo | |
| ceil | false | 1 | true | |
| fetchTree | true | 1 | todo | |
| floor | false | 1 | true | |
| groupBy | false | 2 | true | |
| traceVerbose | false | 2 | todo | |
| zipAttrsWith | false | 2 | true |