6cdfee3573
# Description As part of the refactor to split spans off of Value, this moves to using helper functions to create values, and using `.span()` instead of matching span out of Value directly. Hoping to get a few more helping hands to finish this, as there are a lot of commands to update :) # User-Facing Changes <!-- List of all changes that impact the user experience here. This helps us keep track of breaking changes. --> # Tests + Formatting <!-- Don't forget to add tests that cover your changes. Make sure you've run and fixed any issues with these commands: - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass (on Windows make sure to [enable developer mode](https://learn.microsoft.com/en-us/windows/apps/get-started/developer-mode-features-and-debugging)) - `cargo run -- -c "use std testing; testing run-tests --path crates/nu-std"` to run the tests for the standard library > **Note** > from `nushell` you can also use the `toolkit` as follows > ```bash > use toolkit.nu # or use an `env_change` hook to activate it automatically > toolkit check pr > ``` --> # After Submitting <!-- If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date. --> --------- Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com> Co-authored-by: WindSoilder <windsoilder@outlook.com>
74 lines
2.1 KiB
Rust
74 lines
2.1 KiB
Rust
use nu_protocol::{
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ast::Call,
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engine::{Command, EngineState, Stack},
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record, Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Value,
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};
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use crate::dataframe::values::NuDataFrame;
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#[derive(Clone)]
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pub struct ListDF;
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impl Command for ListDF {
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fn name(&self) -> &str {
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"dfr ls"
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}
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fn usage(&self) -> &str {
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"Lists stored dataframes."
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}
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fn signature(&self) -> Signature {
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Signature::build(self.name()).category(Category::Custom("dataframe".into()))
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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description: "Creates a new dataframe and shows it in the dataframe list",
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example: r#"let test = ([[a b];[1 2] [3 4]] | dfr into-df);
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ls"#,
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result: None,
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}]
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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_input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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let mut vals: Vec<(String, Value)> = vec![];
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for overlay_frame in engine_state.active_overlays(&[]) {
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for var in &overlay_frame.vars {
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if let Ok(value) = stack.get_var(*var.1, call.head) {
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let name = String::from_utf8_lossy(var.0).to_string();
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vals.push((name, value));
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}
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}
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}
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let vals = vals
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.into_iter()
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.filter_map(|(name, value)| {
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NuDataFrame::try_from_value(value).ok().map(|df| (name, df))
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})
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.map(|(name, df)| {
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Value::record(
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record! {
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"name" => Value::string(name, call.head),
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"columns" => Value::int(df.as_ref().width() as i64, call.head),
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"rows" => Value::int(df.as_ref().height() as i64, call.head),
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},
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call.head,
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)
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})
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.collect::<Vec<Value>>();
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let list = Value::list(vals, call.head);
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Ok(list.into_pipeline_data())
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}
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}
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