forked from extern/nushell
70 lines
1.9 KiB
Rust
70 lines
1.9 KiB
Rust
use super::{operate, DefaultArguments};
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use crate::commands::WholeStreamCommand;
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use crate::prelude::*;
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use nu_errors::ShellError;
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use nu_protocol::{Signature, SyntaxShape, UntaggedValue, Value};
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use std::path::Path;
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pub struct PathExtension;
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#[async_trait]
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impl WholeStreamCommand for PathExtension {
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fn name(&self) -> &str {
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"path extension"
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}
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fn signature(&self) -> Signature {
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Signature::build("path extension")
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.rest(SyntaxShape::ColumnPath, "optionally operate by path")
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}
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fn usage(&self) -> &str {
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"gets the extension of a path"
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}
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async fn run(
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&self,
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args: CommandArgs,
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registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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let tag = args.call_info.name_tag.clone();
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let (DefaultArguments { rest }, input) = args.process(®istry).await?;
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operate(input, rest, &action, tag.span).await
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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: "Get extension of a path",
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example: "echo 'test.txt' | path extension",
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result: Some(vec![Value::from("txt")]),
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},
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Example {
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description: "You get an empty string if there is no extension",
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example: "echo 'test' | path extension",
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result: Some(vec![Value::from("")]),
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},
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]
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}
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}
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fn action(path: &Path) -> UntaggedValue {
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UntaggedValue::string(match path.extension() {
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Some(ext) => ext.to_string_lossy().to_string(),
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_ => "".to_string(),
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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::PathExtension;
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use super::ShellError;
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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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Ok(test_examples(PathExtension {})?)
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}
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}
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