139 lines
3.8 KiB
Rust
139 lines
3.8 KiB
Rust
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::ShellTypeName;
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use nu_protocol::{
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ColumnPath, Primitive, ReturnSuccess, Signature, SyntaxShape, UntaggedValue, Value,
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};
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use nu_source::{Tag, Tagged};
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use nu_value_ext::ValueExt;
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#[derive(Deserialize)]
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struct Arguments {
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pattern: Tagged<String>,
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rest: Vec<ColumnPath>,
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}
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pub struct SubCommand;
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#[async_trait]
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impl WholeStreamCommand 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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.required("pattern", SyntaxShape::String, "the pattern to match")
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.rest(
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SyntaxShape::ColumnPath,
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"optionally matches suffix of text by column paths",
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)
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}
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fn usage(&self) -> &str {
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"checks if string ends with pattern"
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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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operate(args, registry).await
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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description: "Checks if string ends with '.rb' pattern",
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example: "echo 'my_library.rb' | str ends-with '.rb'",
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result: Some(vec![UntaggedValue::boolean(true).into_untagged_value()]),
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}]
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}
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}
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async fn operate(
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args: CommandArgs,
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registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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let registry = registry.clone();
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let (Arguments { pattern, rest }, input) = args.process(®istry).await?;
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let column_paths: Vec<_> = rest;
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Ok(input
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.map(move |v| {
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if column_paths.is_empty() {
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ReturnSuccess::value(action(&v, &pattern, v.tag())?)
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} else {
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let mut ret = v;
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for path in &column_paths {
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let pattern = pattern.clone();
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ret = ret.swap_data_by_column_path(
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path,
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Box::new(move |old| action(old, &pattern, old.tag())),
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)?;
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}
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ReturnSuccess::value(ret)
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}
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})
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.to_output_stream())
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}
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fn action(input: &Value, pattern: &str, tag: impl Into<Tag>) -> Result<Value, ShellError> {
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match &input.value {
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UntaggedValue::Primitive(Primitive::Line(s))
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| UntaggedValue::Primitive(Primitive::String(s)) => {
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let ends_with = s.ends_with(pattern);
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Ok(UntaggedValue::boolean(ends_with).into_value(tag))
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}
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other => {
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let got = format!("got {}", other.type_name());
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Err(ShellError::labeled_error(
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"value is not string",
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got,
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tag.into().span,
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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 tests {
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use super::{action, SubCommand};
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use nu_plugin::test_helpers::value::string;
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use nu_protocol::{Primitive, UntaggedValue};
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use nu_source::Tag;
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#[test]
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fn examples_work_as_expected() {
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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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#[test]
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fn str_ends_with_pattern() {
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let word = string("Cargo.toml");
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let pattern = ".toml";
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let expected =
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UntaggedValue::Primitive(Primitive::Boolean(true.into())).into_untagged_value();
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let actual = action(&word, &pattern, Tag::unknown()).unwrap();
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assert_eq!(actual, expected);
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}
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#[test]
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fn str_does_not_end_with_pattern() {
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let word = string("Cargo.toml");
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let pattern = "Car";
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let expected =
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UntaggedValue::Primitive(Primitive::Boolean(false.into())).into_untagged_value();
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let actual = action(&word, &pattern, Tag::unknown()).unwrap();
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assert_eq!(actual, expected);
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}
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}
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