forked from extern/nushell
117 lines
3.1 KiB
Rust
117 lines
3.1 KiB
Rust
use super::{operate, BytesArgument};
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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, Value};
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struct Arguments {
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pattern: Vec<u8>,
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column_paths: Option<Vec<CellPath>>,
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}
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impl BytesArgument for Arguments {
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fn take_column_paths(&mut self) -> Option<Vec<CellPath>> {
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self.column_paths.take()
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}
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}
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#[derive(Clone)]
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pub struct BytesEndsWith;
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impl Command for BytesEndsWith {
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fn name(&self) -> &str {
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"bytes ends-with"
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}
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fn signature(&self) -> Signature {
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Signature::build("bytes ends-with")
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.required("pattern", SyntaxShape::Binary, "the pattern to match")
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.rest(
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"rest",
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SyntaxShape::CellPath,
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"optionally matches prefix of text by column paths",
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)
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.category(Category::Bytes)
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}
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fn usage(&self) -> &str {
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"Check if bytes ends with a pattern"
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}
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fn search_terms(&self) -> Vec<&str> {
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vec!["pattern", "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 pattern: Vec<u8> = call.req(engine_state, stack, 0)?;
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let column_paths: Vec<CellPath> = call.rest(engine_state, stack, 1)?;
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let column_paths = if column_paths.is_empty() {
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None
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} else {
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Some(column_paths)
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};
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let arg = Arguments {
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pattern,
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column_paths,
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};
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operate(ends_with, arg, 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 binary ends with `0x[AA]`",
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example: "0x[1F FF AA AA] | bytes ends-with 0x[AA]",
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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 binary ends with `0x[FF AA AA]`",
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example: "0x[1F FF AA AA] | bytes ends-with 0x[FF AA AA]",
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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 binary ends with `0x[11]`",
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example: "0x[1F FF AA AA] | bytes ends-with 0x[11]",
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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 ends_with(input: &[u8], Arguments { pattern, .. }: &Arguments, span: Span) -> Value {
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Value::Bool {
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val: input.ends_with(pattern),
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span,
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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::*;
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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(BytesEndsWith {})
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}
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}
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