This week in Nushell #243

Nushell

• devyn made lots of improvements, mostly around plugin support: switched the plugin msgpack protocol to named format, fixed the error output in the Python plugin to match LabeledError, added an example Nushell plugin written in Nushell itself, improved safety of get_unchecked_str in nu_system::macos, replaced subtraction of Instants and Durations with saturating subtractions, removed unnecessary fields from Python plugin signature, added a panic unwind handler during plugin calls, improved error messages for plugin protocol by removing #[serde(untagged)], introduced local socket mode and foreground terminal control for plugins, and implemented copy-on-write for record values
• ayax79 did lots of work on dataframe support: removed the polars dtypes command, and only marked collected dataframes as from_lazy=false when collect is called from the collect command, and upgraded nu-cmd-dataframe to polars 0.39, and upgraded nu_plugin_polars to polars 0.39.1, and fixed NuLazyFrame/NuDataFrame conversion issues, and cleaned up to_pipe_line_data and cache_and_to_value, making them part of CustomValueSupport, and ensured that lazy frames converted via to-lazy are not converted back to eager frames later in the pipeline
• poliorcetics added more details to version
• amtoine added "to nuon" enumeration of possible styles, and created a new nuon crate from from nuon and to nuon
• fdncred improved nu --lsp command tooltips, and added the ability to set metadata
• WindSoilder set the type of default NU_LIB_DIRS and NU_PLUGIN_DIRS to list<string>, and disallowed skip on external stream, and removed useless path.rs, and unified working_set.error usage
• TheLostLambda fixed shell_integration to set window title on startup
• IanManske boxed ImportPattern in Expr, and added ListItem type for Expr::List, and made group-by return errors in closure, and added Record::into_columns
• sholderbach updated crate feature flags, and implemented FusedIterator for record iterators, did minor housekeeping in the parser, and improved with-env robustness, and disallowed setting the PWD via load-env input
• merelymyself used abbreviated string instead of debug string for DatetimeParseErrors
• schrieveslaach improved config behaviour in LSP Mode
• YizhePKU fixed circular source causing Nushell to crash

Documentation

• SCKelemen fixed(lang-guide): IEE-754 -> IEEE-754
• maxim-uvarov added the not operator in the list of the order of operations
• devyn documented all variants of Value and fixed error types
• hustcer upgraded all actions for GitHub workflows

Nu_Scripts

• devyn added nu_plugin_nu_example to bump-version.nu
• nils-degroot added zellij action new-tab completions
• kubouch reverted "fix: prefix conda commands with conda"
• zhangymPerson added mvn completion