nushell/src/commands/to_yaml.rs

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use crate::object::{Primitive, Value};
use crate::prelude::*;
pub fn value_to_yaml_value(v: &Value) -> serde_yaml::Value {
match v {
Value::Primitive(Primitive::Boolean(b)) => serde_yaml::Value::Bool(*b),
Value::Primitive(Primitive::Bytes(b)) => {
serde_yaml::Value::Number(serde_yaml::Number::from(*b as u64))
}
Value::Primitive(Primitive::Date(d)) => serde_yaml::Value::String(d.to_string()),
Value::Primitive(Primitive::EndOfStream) => serde_yaml::Value::Null,
Value::Primitive(Primitive::BeginningOfStream) => serde_yaml::Value::Null,
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Value::Primitive(Primitive::Float(f)) => {
serde_yaml::Value::Number(serde_yaml::Number::from(f.into_inner()))
}
Value::Primitive(Primitive::Int(i)) => {
serde_yaml::Value::Number(serde_yaml::Number::from(*i))
}
Value::Primitive(Primitive::Nothing) => serde_yaml::Value::Null,
Value::Primitive(Primitive::String(s)) => serde_yaml::Value::String(s.clone()),
Value::Primitive(Primitive::Path(s)) => serde_yaml::Value::String(s.display().to_string()),
Value::List(l) => {
serde_yaml::Value::Sequence(l.iter().map(|x| value_to_yaml_value(x)).collect())
}
Value::Block(_) => serde_yaml::Value::Null,
Value::Binary(b) => serde_yaml::Value::Sequence(
b.iter()
.map(|x| serde_yaml::Value::Number(serde_yaml::Number::from(*x)))
.collect(),
),
Value::Object(o) => {
let mut m = serde_yaml::Mapping::new();
for (k, v) in o.entries.iter() {
m.insert(serde_yaml::Value::String(k.clone()), value_to_yaml_value(v));
}
serde_yaml::Value::Mapping(m)
}
}
}
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pub fn to_yaml(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
let args = args.evaluate_once(registry)?;
let name_span = args.name_span();
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let out = args.input;
Ok(out
.values
.map(
move |a| match serde_yaml::to_string(&value_to_yaml_value(&a)) {
Ok(x) => ReturnSuccess::value(
Value::Primitive(Primitive::String(x)).simple_spanned(name_span),
),
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_ => Err(ShellError::labeled_error_with_secondary(
"Expected an object with YAML-compatible structure from pipeline",
"requires YAML-compatible input",
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name_span,
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format!("{} originates from here", a.item.type_name()),
a.span(),
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)),
},
)
.to_output_stream())
}