forked from extern/nushell
116 lines
3.2 KiB
Rust
116 lines
3.2 KiB
Rust
use crate::input_handler::{operate, CmdArgument};
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use nu_engine::CallExt;
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use nu_protocol::ast::Call;
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use nu_protocol::ast::CellPath;
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use nu_protocol::engine::{Command, EngineState, Stack};
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use nu_protocol::Category;
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use nu_protocol::{Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value};
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struct Arguments {
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substring: String,
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cell_paths: Option<Vec<CellPath>>,
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}
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impl CmdArgument for Arguments {
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fn take_cell_paths(&mut self) -> Option<Vec<CellPath>> {
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self.cell_paths.take()
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}
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}
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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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"str ends-with"
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}
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fn signature(&self) -> Signature {
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Signature::build("str ends-with")
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.input_output_types(vec![(Type::String, Type::Bool)])
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.vectorizes_over_list(true)
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.required("string", SyntaxShape::String, "the string to match")
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.rest(
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"rest",
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SyntaxShape::CellPath,
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"For a data structure input, check strings at the given cell paths, and replace with result",
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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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"Check if an input ends with a string"
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}
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fn search_terms(&self) -> Vec<&str> {
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vec!["suffix", "match", "find", "search"]
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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 cell_paths: Vec<CellPath> = call.rest(engine_state, stack, 1)?;
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let cell_paths = (!cell_paths.is_empty()).then_some(cell_paths);
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let args = Arguments {
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substring: call.req::<String>(engine_state, stack, 0)?,
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cell_paths,
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};
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operate(action, args, input, call.head, engine_state.ctrlc.clone())
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}
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "Checks if string ends with '.rb'",
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example: "'my_library.rb' | str ends-with '.rb'",
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result: Some(Value::Bool {
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val: true,
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span: Span::test_data(),
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}),
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},
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Example {
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description: "Checks if string ends with '.txt'",
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example: "'my_library.rb' | str ends-with '.txt'",
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result: Some(Value::Bool {
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val: false,
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span: Span::test_data(),
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}),
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},
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]
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}
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}
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fn action(input: &Value, args: &Arguments, head: Span) -> Value {
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match input {
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Value::String { val, .. } => Value::Bool {
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val: val.ends_with(&args.substring),
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span: head,
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},
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other => Value::Error {
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error: ShellError::UnsupportedInput(
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format!(
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"Input's type is {}. This command only works with strings.",
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other.get_type()
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),
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head,
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),
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},
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_examples() {
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use crate::test_examples;
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test_examples(SubCommand {})
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}
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}
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