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# Description This PR adds the ability to set metadata. This is especially useful for activating LS_COLORS when using table literals.  You can also set the filepath metadata, although I'm not really user how useful this is. We may end up removing this option entirely. ```nushell ❯ "crates" | metadata set --datasource-filepath $'(pwd)/crates' | metadata ╭────────┬───────────────────────────────────╮ │ source │ /Users/fdncred/src/nushell/crates │ ╰────────┴───────────────────────────────────╯ ``` No file paths are checked. You could also do this. ```nushell ❯ "crates" | metadata set --datasource-filepath $'a/b/c/d/crates' | metadata ╭────────┬────────────────╮ │ source │ a/b/c/d/crates │ ╰────────┴────────────────╯ ``` The command name and parameter names are still WIP. We could change them. There are currently 3 kinds of metadata in nushell. ```rust pub enum DataSource { Ls, HtmlThemes, FilePath(PathBuf), } ``` I've skipped adding `HtmlThemes` because it seems to be specific to our `to html` command only.
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.