forked from extern/nushell
92 lines
2.3 KiB
Rust
92 lines
2.3 KiB
Rust
use crate::commands::to_delimited_data::to_delimited_data;
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use crate::prelude::*;
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use nu_engine::WholeStreamCommand;
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use nu_errors::ShellError;
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use nu_protocol::{Primitive, Signature, SyntaxShape, UntaggedValue, Value};
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pub struct ToCSV;
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#[derive(Deserialize)]
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pub struct ToCSVArgs {
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headerless: bool,
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separator: Option<Value>,
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}
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#[async_trait]
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impl WholeStreamCommand for ToCSV {
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fn name(&self) -> &str {
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"to csv"
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}
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fn signature(&self) -> Signature {
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Signature::build("to csv")
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.named(
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"separator",
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SyntaxShape::String,
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"a character to separate columns, defaults to ','",
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Some('s'),
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)
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.switch(
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"headerless",
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"do not output the columns names as the first row",
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None,
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)
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}
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fn usage(&self) -> &str {
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"Convert table into .csv text "
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}
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async fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
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to_csv(args).await
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}
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}
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async fn to_csv(args: CommandArgs) -> Result<OutputStream, ShellError> {
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let name = args.call_info.name_tag.clone();
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let (
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ToCSVArgs {
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separator,
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headerless,
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},
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input,
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) = args.process().await?;
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let sep = match separator {
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Some(Value {
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value: UntaggedValue::Primitive(Primitive::String(s)),
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tag,
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..
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}) => {
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if s == r"\t" {
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'\t'
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} else {
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let vec_s: Vec<char> = s.chars().collect();
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if vec_s.len() != 1 {
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return Err(ShellError::labeled_error(
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"Expected a single separator char from --separator",
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"requires a single character string input",
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tag,
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));
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};
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vec_s[0]
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}
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}
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_ => ',',
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};
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to_delimited_data(headerless, sep, "CSV", input, name).await
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}
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#[cfg(test)]
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mod tests {
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use super::ShellError;
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use super::ToCSV;
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#[test]
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fn examples_work_as_expected() -> Result<(), ShellError> {
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use crate::examples::test as test_examples;
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test_examples(ToCSV {})
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}
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}
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