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0fa08b4516
Previously, there were two mostly-identical value printers -- one in `libexpr/eval.cc` (which didn't force values) and one in `libcmd/repl.cc` (which did force values and also printed ANSI color codes). This PR unifies both of these printers into `print.cc` and provides a `PrintOptions` struct for controlling the output, which allows for toggling whether values are forced, whether repeated values are tracked, and whether ANSI color codes are displayed. Additionally, `PrintOptions` allows tuning the maximum number of attributes, list items, and bytes in a string that will be displayed; this makes it ideal for contexts where printing too much output (e.g. all of Nixpkgs) is distracting. (As requested by @roberth in https://github.com/NixOS/nix/pull/9554#issuecomment-1845095735) Please read the tests for example output. Future work: - It would be nice to provide this function as a builtin, perhaps `builtins.toStringDebug` -- a printing function that never fails would be useful when debugging Nix code. - It would be nice to support customizing `PrintOptions` members on the command line, e.g. `--option to-string-max-attrs 1000`. |
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| .. | ||
| flake | ||
| primops | ||
| value | ||
| attr-path.cc | ||
| attr-path.hh | ||
| attr-set.cc | ||
| attr-set.hh | ||
| eval-cache.cc | ||
| eval-cache.hh | ||
| eval-inline.hh | ||
| eval-settings.cc | ||
| eval-settings.hh | ||
| eval.cc | ||
| eval.hh | ||
| fetchurl.nix | ||
| function-trace.cc | ||
| function-trace.hh | ||
| gc-small-vector.hh | ||
| get-drvs.cc | ||
| get-drvs.hh | ||
| imported-drv-to-derivation.nix | ||
| json-to-value.cc | ||
| json-to-value.hh | ||
| lexer.l | ||
| local.mk | ||
| nix-expr.pc.in | ||
| nixexpr.cc | ||
| nixexpr.hh | ||
| parser.y | ||
| paths.cc | ||
| primops.cc | ||
| primops.hh | ||
| print-options.hh | ||
| print.cc | ||
| print.hh | ||
| search-path.cc | ||
| search-path.hh | ||
| symbol-table.hh | ||
| value-to-json.cc | ||
| value-to-json.hh | ||
| value-to-xml.cc | ||
| value-to-xml.hh | ||
| value.hh | ||