83bb494a30
This extends the `error: cannot coerce a TYPE to a string` message to print the value that could not be coerced. This helps with debugging by making it easier to track down where the value is being produced from, especially in errors with deep or unhelpful stack traces.
71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
#pragma once
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/**
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* @file
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* @brief Options for printing Nix values.
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*/
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#include <limits>
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namespace nix {
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/**
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* Options for printing Nix values.
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*/
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struct PrintOptions
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{
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/**
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* If true, output ANSI color sequences.
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*/
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bool ansiColors = false;
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/**
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* If true, force values.
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*/
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bool force = false;
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/**
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* If true and `force` is set, print derivations as
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* `«derivation /nix/store/...»` instead of as attribute sets.
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*/
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bool derivationPaths = false;
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/**
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* If true, track which values have been printed and skip them on
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* subsequent encounters. Useful for self-referential values.
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*/
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bool trackRepeated = true;
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/**
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* Maximum depth to evaluate to.
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*/
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size_t maxDepth = std::numeric_limits<size_t>::max();
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/**
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* Maximum number of attributes in attribute sets to print.
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*
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* Note that this is a limit for the entire print invocation, not for each
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* attribute set encountered.
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*/
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size_t maxAttrs = std::numeric_limits<size_t>::max();
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/**
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* Maximum number of list items to print.
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*
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* Note that this is a limit for the entire print invocation, not for each
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* list encountered.
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*/
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size_t maxListItems = std::numeric_limits<size_t>::max();
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/**
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* Maximum string length to print.
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*/
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size_t maxStringLength = std::numeric_limits<size_t>::max();
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};
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/**
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* `PrintOptions` for unknown and therefore potentially large values in error messages,
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* to avoid printing "too much" output.
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*/
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static PrintOptions errorPrintOptions = PrintOptions {
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.ansiColors = true,
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.maxDepth = 10,
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.maxAttrs = 10,
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.maxListItems = 10,
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.maxStringLength = 1024
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};
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}
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