Add missing file

src/commands/to_yaml.rs

@@ -0,0 +1,60 @@
+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::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::Filesystem => serde_yaml::Value::Null,
+        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)
+        }
+    }
+}
+
+pub fn to_yaml(args: CommandArgs) -> Result<OutputStream, ShellError> {
+    let out = args.input;
+    let name_span = args.name_span;
+    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)).spanned(name_span))
+                }
+                Err(_) => Err(ShellError::maybe_labeled_error(
+                    "Can not convert to YAML string",
+                    "can not convert piped data to YAML string",
+                    name_span,
+                )),
+            },
+        )
+        .to_output_stream())
+}