nushell/src/commands/to_toml.rs

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use crate::commands::WholeStreamCommand;
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use crate::object::{Primitive, Value};
use crate::prelude::*;
pub struct ToTOML;
impl WholeStreamCommand for ToTOML {
fn run(
&self,
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
to_toml(args, registry)
}
fn name(&self) -> &str {
"to-toml"
}
fn signature(&self) -> Signature {
Signature::build("to-toml")
}
}
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pub fn value_to_toml_value(v: &Value) -> toml::Value {
match v {
Value::Primitive(Primitive::Boolean(b)) => toml::Value::Boolean(*b),
Value::Primitive(Primitive::Bytes(b)) => toml::Value::Integer(*b as i64),
Value::Primitive(Primitive::Date(d)) => toml::Value::String(d.to_string()),
Value::Primitive(Primitive::EndOfStream) => {
toml::Value::String("<End of Stream>".to_string())
}
Value::Primitive(Primitive::BeginningOfStream) => {
toml::Value::String("<Beginning of Stream>".to_string())
}
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Value::Primitive(Primitive::Float(f)) => toml::Value::Float(f.into_inner()),
Value::Primitive(Primitive::Int(i)) => toml::Value::Integer(*i),
Value::Primitive(Primitive::Nothing) => toml::Value::String("<Nothing>".to_string()),
Value::Primitive(Primitive::String(s)) => toml::Value::String(s.clone()),
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Value::Primitive(Primitive::Path(s)) => toml::Value::String(s.display().to_string()),
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Value::List(l) => toml::Value::Array(l.iter().map(|x| value_to_toml_value(x)).collect()),
Value::Block(_) => toml::Value::String("<Block>".to_string()),
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Value::Binary(b) => {
toml::Value::Array(b.iter().map(|x| toml::Value::Integer(*x as i64)).collect())
}
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Value::Object(o) => {
let mut m = toml::map::Map::new();
for (k, v) in o.entries.iter() {
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m.insert(k.clone(), value_to_toml_value(v));
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}
toml::Value::Table(m)
}
}
}
fn to_toml(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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let args = args.evaluate_once(registry)?;
let name_span = args.name_span();
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let out = args.input;
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Ok(out
.values
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.map(move |a| match toml::to_string(&value_to_toml_value(&a)) {
Ok(val) => {
return ReturnSuccess::value(
Value::Primitive(Primitive::String(val)).simple_spanned(name_span),
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)
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}
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_ => Err(ShellError::labeled_error_with_secondary(
"Expected an object with TOML-compatible structure from pipeline",
"requires TOML-compatible input",
name_span,
format!("{} originates from here", a.item.type_name()),
a.span(),
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)),
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})
.to_output_stream())
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}