2021-10-09 04:45:25 +02:00
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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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2021-10-25 18:58:58 +02:00
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engine::{Command, EngineState, Stack},
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2021-11-17 05:22:37 +01:00
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Category, PipelineData, ShellError, Signature, Span, Spanned, SyntaxShape, Type, Value,
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};
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2021-10-25 06:01:02 +02:00
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#[derive(Clone)]
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pub struct SubCommand;
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impl Command for SubCommand {
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fn name(&self) -> &str {
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"split row"
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}
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fn signature(&self) -> Signature {
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Signature::build("split row")
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.required(
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"separator",
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SyntaxShape::String,
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"the character that denotes what separates rows",
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)
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.category(Category::Strings)
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}
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fn usage(&self) -> &str {
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"splits contents over multiple rows via the separator."
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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<nu_protocol::PipelineData, nu_protocol::ShellError> {
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split_row(engine_state, stack, call, input)
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}
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}
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fn split_row(
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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<nu_protocol::PipelineData, nu_protocol::ShellError> {
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let name_span = call.head;
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let separator: Spanned<String> = call.req(engine_state, stack, 0)?;
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2021-10-28 06:13:10 +02:00
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input.flat_map(
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move |x| split_row_helper(&x, &separator, name_span),
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engine_state.ctrlc.clone(),
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)
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}
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fn split_row_helper(v: &Value, separator: &Spanned<String>, name: Span) -> Vec<Value> {
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match v.span() {
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Ok(v_span) => {
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if let Ok(s) = v.as_string() {
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let splitter = separator.item.replace("\\n", "\n");
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s.split(&splitter)
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.filter_map(|s| {
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if s.trim() != "" {
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Some(Value::string(s, v_span))
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} else {
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None
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}
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})
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.collect()
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} else {
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vec![Value::Error {
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error: ShellError::PipelineMismatch {
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expected: Type::String,
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expected_span: name,
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origin: v_span,
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},
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}]
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}
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}
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Err(error) => vec![Value::Error { error }],
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}
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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::SubCommand;
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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(SubCommand {})
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// }
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// }
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