5e70d4121a
# Description This PR tries to resolve the overloading issue by going back to our original naming convention for dataframes. So, this PR renames all dataframe commands with a prefix of `dfr`. Some commands like `open-df` were renamed to `dfr open` and things like `into df` were renamed `dfr into-df`. I'm sure we can optimize naming a bit, but it seems to compile now. # User-Facing Changes All dataframe commands are prefixed with dfr. # 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 -A clippy::needless_collect` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass # 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.
95 lines
2.4 KiB
Rust
95 lines
2.4 KiB
Rust
use std::{fs::File, path::PathBuf};
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use nu_engine::CallExt;
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use nu_protocol::{
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ast::Call,
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engine::{Command, EngineState, Stack},
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Category, Example, PipelineData, ShellError, Signature, Spanned, SyntaxShape, Type, Value,
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};
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use polars::prelude::{IpcWriter, SerWriter};
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use super::super::values::NuDataFrame;
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#[derive(Clone)]
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pub struct ToArrow;
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impl Command for ToArrow {
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fn name(&self) -> &str {
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"dfr to-arrow"
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}
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fn usage(&self) -> &str {
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"Saves dataframe to arrow file"
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}
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fn signature(&self) -> Signature {
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Signature::build(self.name())
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.required("file", SyntaxShape::Filepath, "file path to save dataframe")
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.input_type(Type::Custom("dataframe".into()))
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.output_type(Type::Any)
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.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: "Saves dataframe to arrow file",
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example: "[[a b]; [1 2] [3 4]] | dfr into-df | dfr to-arrow test.arrow",
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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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command(engine_state, stack, call, input)
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}
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}
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fn command(
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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 file_name: Spanned<PathBuf> = call.req(engine_state, stack, 0)?;
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let mut df = NuDataFrame::try_from_pipeline(input, call.head)?;
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let mut file = File::create(&file_name.item).map_err(|e| {
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ShellError::GenericError(
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"Error with file name".into(),
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e.to_string(),
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Some(file_name.span),
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None,
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Vec::new(),
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)
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})?;
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IpcWriter::new(&mut file).finish(df.as_mut()).map_err(|e| {
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ShellError::GenericError(
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"Error saving file".into(),
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e.to_string(),
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Some(file_name.span),
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None,
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Vec::new(),
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)
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})?;
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let file_value = Value::String {
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val: format!("saved {:?}", &file_name.item),
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span: file_name.span,
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};
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Ok(PipelineData::Value(
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Value::List {
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vals: vec![file_value],
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span: call.head,
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},
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None,
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))
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}
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