mirror of
https://github.com/nushell/nushell.git
synced 2025-05-07 08:22:58 +00:00
8e2917b9ae
# Description This makes assignment operations and `const` behave the same way `let` and `mut` do, absorbing the rest of the pipeline. Changes the lexer to be able to recognize assignment operators as a separate token, and then makes the lite parser continue to push spans into the same command regardless of any redirections or pipes if an assignment operator is encountered. Because the pipeline is no longer split up by the lite parser at this point, it's trivial to just parse the right hand side as if it were a subexpression not contained within parentheses. # User-Facing Changes Big breaking change. These are all now possible: ```nushell const path = 'a' | path join 'b' mut x = 2 $x = random int $x = [1 2 3] | math sum $env.FOO = random chars ``` In the past, these would have led to (an attempt at) bare word string parsing. So while `$env.FOO = bar` would have previously set the environment variable `FOO` to the string `"bar"`, it now tries to run the command named `bar`, hence the major breaking change. However, this is desirable because it is very consistent - if you see the `=`, you can just assume it absorbs everything else to the right of it. # Tests + Formatting Added tests for the new behaviour. Adjusted some existing tests that depended on the right hand side of assignments being parsed as barewords. # After Submitting - [ ] release notes (breaking change!)
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.