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Allow knowing the command name tag given no input. (#3988)

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```
tags
```
This commit is contained in:
Andrés N. Robalino 2021-09-03 01:46:15 -05:00 committed by GitHub
parent c9c6bd4836
commit 4e2d3ceaaf
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1 changed files with 34 additions and 25 deletions
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41
crates/nu-command/src/commands/core_commands/tags.rs
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@ -18,43 +18,52 @@ impl WholeStreamCommand for Tags {
"Read the tags (metadata) for values."
}
fn run_with_actions(&self, args: CommandArgs) -> Result<ActionStream, ShellError> {
fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
Ok(tags(args))
}
}
fn tags(args: CommandArgs) -> ActionStream {
args.input
.map(move |v| {
TaggedDictBuilder::build(v.tag(), |tags| {
if let Some(anchor) = anchor_as_value(&v) {
fn build_tag_table(tag: impl Into<Tag>) -> Value {
let tag = tag.into();
let span = tag.span;
TaggedDictBuilder::build(tag.clone(), |tags| {
if let Some(anchor) = anchor_as_value(&tag) {
tags.insert_value("anchor", anchor);
}
tags.insert_value(
"span",
TaggedDictBuilder::build(v.tag(), |span_dict| {
let span = v.tag().span;
TaggedDictBuilder::build(tag.clone(), |span_dict| {
span_dict.insert_untagged("start", UntaggedValue::int(span.start() as i64));
span_dict.insert_untagged("end", UntaggedValue::int(span.end() as i64));
}),
);
})
})
.into_action_stream()
}
fn anchor_as_value(value: &Value) -> Option<Value> {
let tag = value.tag();
let anchor = tag.anchor;
fn tags(args: CommandArgs) -> OutputStream {
if args.input.is_empty() {
OutputStream::one(build_tag_table(&args.name_tag()))
} else {
args.input
.map(move |v| build_tag_table(v.tag()))
.into_output_stream()
}
}
fn anchor_as_value(tag: &Tag) -> Option<Value> {
let anchor = tag.anchor.as_ref();
anchor.as_ref()?;
Some(TaggedDictBuilder::build(value.tag(), |table| {
Some(TaggedDictBuilder::build(tag, |table| {
let value = match anchor {
Some(AnchorLocation::File(path)) => Some(("file", UntaggedValue::from(path))),
Some(AnchorLocation::File(path)) => {
Some(("file", UntaggedValue::from(path.to_string())))
}
Some(AnchorLocation::Url(destination)) => {
Some(("url", UntaggedValue::from(destination)))
Some(("url", UntaggedValue::from(destination.to_string())))
}
Some(AnchorLocation::Source(text)) => Some((
"source",