36 lines
936 B
Rust
36 lines
936 B
Rust
use indexmap::IndexMap;
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use nu_errors::ShellError;
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use nu_protocol::{TaggedDictBuilder, UntaggedValue, Value};
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use nu_source::Tag;
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use nu_value_ext::as_string;
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#[allow(clippy::type_complexity)]
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pub fn group(
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values: &Value,
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grouper: &Option<Box<dyn Fn(&Value) -> Result<String, ShellError> + Send>>,
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tag: impl Into<Tag>,
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) -> Result<Value, ShellError> {
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let tag = tag.into();
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let mut groups: IndexMap<String, Vec<Value>> = IndexMap::new();
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for value in values.table_entries() {
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let group_key = if let Some(ref grouper) = grouper {
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grouper(&value)
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} else {
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as_string(&value)
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};
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let group = groups.entry(group_key?).or_insert(vec![]);
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group.push((*value).clone());
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}
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let mut out = TaggedDictBuilder::new(&tag);
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for (k, v) in groups.iter() {
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out.insert_untagged(k, UntaggedValue::table(v));
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}
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Ok(out.into_value())
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}
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