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``` Error: nu::parser::not_a_constant (link) × Not a constant. ╭─[entry #23:1:1] 1 │ let file = "/home/user/file"; source $file · ──┬── · ╰── Value is not a parse-time constant ╰──── help: Only a subset of expressions are allowed constants during parsing. Try using the 'let' command or typing the value literally. ``` this pr changes the help message to 'Try using the `const` command ...'
Nushell core libraries and plugins
These sub-crates form both the foundation for Nu and a set of plugins which extend Nu with additional functionality.
Foundational libraries are split into two kinds of crates:
- Core crates - those crates that work together to build the Nushell language engine
- Support crates - a set of crates that support the engine with additional features like JSON support, ANSI support, and more.
Plugins are likewise also split into two types:
- Core plugins - plugins that provide part of the default experience of Nu, including access to the system properties, processes, and web-connectivity features.
- Extra plugins - these plugins run a wide range of different capabilities like working with different file types, charting, viewing binary data, and more.