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lib/debug: add traceValFn, traceValSeqFn, traceValSeqNFn

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Being able to modify the value on-the-fly before printing is very useful in
practice.
This commit is contained in:
Profpatsch 2018-04-02 17:21:35 +02:00
parent f13873f35a
commit a5f6cdfd7e
2 changed files with 11 additions and 7 deletions
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9
lib/debug.nix
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@ -17,7 +17,8 @@ rec {
traceIf = p: msg: x: if p then trace msg x else x;
traceVal = x: trace x x;
traceValFn = f: x: trace (f x) x;
traceVal = traceValFn id;
traceXMLVal = x: trace (builtins.toXML x) x;
traceXMLValMarked = str: x: trace (str + builtins.toXML x) x;
@ -44,9 +45,11 @@ rec {
(modify depth snip x)) y;
/* `traceSeq`, but the same value is traced and returned */
traceValSeq = v: traceVal (builtins.deepSeq v v);
traceValSeqFn = f: v: traceVal f (builtins.deepSeq v v);
traceValSeq = traceValSeqFn id;
/* `traceValSeq` but with fixed depth */
traceValSeqN = depth: v: traceSeqN depth v v;
traceValSeqNFn = f: depth: v: traceSeqN depth (f v) v;
traceValSeqN = traceValSeqNFn id;
# this can help debug your code as well - designed to not produce thousands of lines

9
lib/default.nix
View file

@ -115,11 +115,12 @@ let
unknownModule mkOption;
inherit (types) isType setType defaultTypeMerge defaultFunctor
isOptionType mkOptionType;
inherit (debug) addErrorContextToAttrs traceIf traceVal
inherit (debug) addErrorContextToAttrs traceIf traceVal traceValFn
traceXMLVal traceXMLValMarked traceSeq traceSeqN traceValSeq
traceValSeqN traceShowVal traceShowValMarked
showVal traceCall traceCall2 traceCall3 traceValIfNot runTests
testAllTrue strict traceCallXml attrNamesToStr;
traceValSeqFn traceValSeqN traceValSeqNFn traceShowVal
traceShowValMarked showVal traceCall traceCall2 traceCall3
traceValIfNot runTests testAllTrue strict traceCallXml
attrNamesToStr;
inherit (misc) maybeEnv defaultMergeArg defaultMerge foldArgs
defaultOverridableDelayableArgs composedArgsAndFun
maybeAttrNullable maybeAttr ifEnable checkFlag getValue