mirror of
https://github.com/NixOS/nixpkgs.git
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81e1e68eaf
It's a common pattern in Nixpkgs to want to emit a warning in certain cases, but not actually change behaviours. This is often expressed as either if cond then lib.warn "Don't do that thing" x else x Or (if cond then lib.warn "Don't do that thing" else lib.id) x Neither of which really expresses the intent here, because it looks like 'x' is being chosen conditionally. To make this clearer, I introduce a "warnIf" function, which makes it clear that the only thing being affected by the condition is whether the warning is generated, not the value being returned.
151 lines
6.7 KiB
Nix
151 lines
6.7 KiB
Nix
/* Library of low-level helper functions for nix expressions.
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*
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* Please implement (mostly) exhaustive unit tests
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* for new functions in `./tests.nix'.
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*/
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let
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inherit (import ./fixed-points.nix { inherit lib; }) makeExtensible;
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lib = makeExtensible (self: let
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callLibs = file: import file { lib = self; };
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in {
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# often used, or depending on very little
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trivial = callLibs ./trivial.nix;
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fixedPoints = callLibs ./fixed-points.nix;
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# datatypes
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attrsets = callLibs ./attrsets.nix;
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lists = callLibs ./lists.nix;
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strings = callLibs ./strings.nix;
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stringsWithDeps = callLibs ./strings-with-deps.nix;
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# packaging
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customisation = callLibs ./customisation.nix;
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maintainers = import ../maintainers/maintainer-list.nix;
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teams = callLibs ../maintainers/team-list.nix;
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meta = callLibs ./meta.nix;
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sources = callLibs ./sources.nix;
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versions = callLibs ./versions.nix;
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# module system
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modules = callLibs ./modules.nix;
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options = callLibs ./options.nix;
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types = callLibs ./types.nix;
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# constants
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licenses = callLibs ./licenses.nix;
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systems = callLibs ./systems;
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# serialization
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cli = callLibs ./cli.nix;
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generators = callLibs ./generators.nix;
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# misc
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asserts = callLibs ./asserts.nix;
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debug = callLibs ./debug.nix;
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misc = callLibs ./deprecated.nix;
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# domain-specific
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fetchers = callLibs ./fetchers.nix;
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# Eval-time filesystem handling
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filesystem = callLibs ./filesystem.nix;
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# back-compat aliases
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platforms = self.systems.doubles;
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# linux kernel configuration
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kernel = callLibs ./kernel.nix;
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inherit (builtins) add addErrorContext attrNames concatLists
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deepSeq elem elemAt filter genericClosure genList getAttr
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hasAttr head isAttrs isBool isInt isList isString length
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lessThan listToAttrs pathExists readFile replaceStrings seq
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stringLength sub substring tail trace;
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inherit (self.trivial) id const pipe concat or and bitAnd bitOr bitXor
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bitNot boolToString mergeAttrs flip mapNullable inNixShell isFloat min max
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importJSON importTOML warn warnIf info showWarnings nixpkgsVersion version
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mod compare splitByAndCompare functionArgs setFunctionArgs isFunction
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toHexString toBaseDigits;
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inherit (self.fixedPoints) fix fix' converge extends composeExtensions
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composeManyExtensions makeExtensible makeExtensibleWithCustomName;
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inherit (self.attrsets) attrByPath hasAttrByPath setAttrByPath
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getAttrFromPath attrVals attrValues getAttrs catAttrs filterAttrs
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filterAttrsRecursive foldAttrs collect nameValuePair mapAttrs
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mapAttrs' mapAttrsToList mapAttrsRecursive mapAttrsRecursiveCond
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genAttrs isDerivation toDerivation optionalAttrs
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zipAttrsWithNames zipAttrsWith zipAttrs recursiveUpdateUntil
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recursiveUpdate matchAttrs overrideExisting getOutput getBin
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getLib getDev getMan chooseDevOutputs zipWithNames zip
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recurseIntoAttrs dontRecurseIntoAttrs cartesianProductOfSets;
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inherit (self.lists) singleton forEach foldr fold foldl foldl' imap0 imap1
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concatMap flatten remove findSingle findFirst any all count
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optional optionals toList range partition zipListsWith zipLists
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reverseList listDfs toposort sort naturalSort compareLists take
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drop sublist last init crossLists unique intersectLists
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subtractLists mutuallyExclusive groupBy groupBy';
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inherit (self.strings) concatStrings concatMapStrings concatImapStrings
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intersperse concatStringsSep concatMapStringsSep
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concatImapStringsSep makeSearchPath makeSearchPathOutput
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makeLibraryPath makeBinPath optionalString
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hasInfix hasPrefix hasSuffix stringToCharacters stringAsChars escape
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escapeShellArg escapeShellArgs replaceChars lowerChars
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upperChars toLower toUpper addContextFrom splitString
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removePrefix removeSuffix versionOlder versionAtLeast
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getName getVersion
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nameFromURL enableFeature enableFeatureAs withFeature
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withFeatureAs fixedWidthString fixedWidthNumber isStorePath
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toInt readPathsFromFile fileContents;
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inherit (self.stringsWithDeps) textClosureList textClosureMap
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noDepEntry fullDepEntry packEntry stringAfter;
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inherit (self.customisation) overrideDerivation makeOverridable
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callPackageWith callPackagesWith extendDerivation hydraJob
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makeScope makeScopeWithSplicing;
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inherit (self.meta) addMetaAttrs dontDistribute setName updateName
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appendToName mapDerivationAttrset setPrio lowPrio lowPrioSet hiPrio
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hiPrioSet;
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inherit (self.sources) pathType pathIsDirectory cleanSourceFilter
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cleanSource sourceByRegex sourceFilesBySuffices
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commitIdFromGitRepo cleanSourceWith pathHasContext
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canCleanSource pathIsRegularFile pathIsGitRepo;
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inherit (self.modules) evalModules unifyModuleSyntax
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applyIfFunction mergeModules
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mergeModules' mergeOptionDecls evalOptionValue mergeDefinitions
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pushDownProperties dischargeProperties filterOverrides
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sortProperties fixupOptionType mkIf mkAssert mkMerge mkOverride
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mkOptionDefault mkDefault mkForce mkVMOverride mkStrict
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mkFixStrictness mkOrder mkBefore mkAfter mkAliasDefinitions
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mkAliasAndWrapDefinitions fixMergeModules mkRemovedOptionModule
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mkRenamedOptionModule mkMergedOptionModule mkChangedOptionModule
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mkAliasOptionModule doRename;
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inherit (self.options) isOption mkEnableOption mkSinkUndeclaredOptions
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mergeDefaultOption mergeOneOption mergeEqualOption getValues
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getFiles optionAttrSetToDocList optionAttrSetToDocList'
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scrubOptionValue literalExample showOption showFiles
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unknownModule mkOption;
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inherit (self.types) isType setType defaultTypeMerge defaultFunctor
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isOptionType mkOptionType;
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inherit (self.asserts)
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assertMsg assertOneOf;
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inherit (self.debug) addErrorContextToAttrs traceIf traceVal traceValFn
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traceXMLVal traceXMLValMarked traceSeq traceSeqN traceValSeq
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traceValSeqFn traceValSeqN traceValSeqNFn traceFnSeqN traceShowVal
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traceShowValMarked showVal traceCall traceCall2 traceCall3
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traceValIfNot runTests testAllTrue traceCallXml attrNamesToStr;
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inherit (self.misc) maybeEnv defaultMergeArg defaultMerge foldArgs
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maybeAttrNullable maybeAttr ifEnable checkFlag getValue
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checkReqs uniqList uniqListExt condConcat lazyGenericClosure
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innerModifySumArgs modifySumArgs innerClosePropagation
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closePropagation mapAttrsFlatten nvs setAttr setAttrMerge
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mergeAttrsWithFunc mergeAttrsConcatenateValues
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mergeAttrsNoOverride mergeAttrByFunc mergeAttrsByFuncDefaults
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mergeAttrsByFuncDefaultsClean mergeAttrBy
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fakeHash fakeSha256 fakeSha512
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nixType imap;
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inherit (self.versions)
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splitVersion;
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});
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in lib
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