forked from extern/nushell
71 lines
1.9 KiB
Rust
71 lines
1.9 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::{Signature, TaggedDictBuilder, UntaggedValue};
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pub struct Tags;
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#[async_trait]
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impl WholeStreamCommand for Tags {
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fn name(&self) -> &str {
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"tags"
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}
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fn signature(&self) -> Signature {
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Signature::build("tags")
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}
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fn usage(&self) -> &str {
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"Read the tags (metadata) for values."
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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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tags(args, registry)
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}
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}
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fn tags(args: CommandArgs, _registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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Ok(args
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.input
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.map(move |v| {
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let mut tags = TaggedDictBuilder::new(v.tag());
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{
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let anchor = v.anchor();
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let span = v.tag.span;
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let mut dict = TaggedDictBuilder::new(v.tag());
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dict.insert_untagged("start", UntaggedValue::int(span.start() as i64));
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dict.insert_untagged("end", UntaggedValue::int(span.end() as i64));
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tags.insert_value("span", dict.into_value());
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match anchor {
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Some(AnchorLocation::File(source)) => {
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tags.insert_untagged("anchor", UntaggedValue::string(source));
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}
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Some(AnchorLocation::Url(source)) => {
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tags.insert_untagged("anchor", UntaggedValue::string(source));
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}
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_ => {}
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}
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}
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tags.into_value()
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})
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.to_output_stream())
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}
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#[cfg(test)]
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mod tests {
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use super::Tags;
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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(Tags {})
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}
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}
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