forked from extern/nushell
105 lines
3.2 KiB
Rust
105 lines
3.2 KiB
Rust
use crate::prelude::*;
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use nu_engine::WholeStreamCommand;
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use nu_errors::ShellError;
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use nu_protocol::{Primitive, ReturnSuccess, Signature, TaggedDictBuilder, UntaggedValue, Value};
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pub struct FromTOML;
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#[async_trait]
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impl WholeStreamCommand for FromTOML {
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fn name(&self) -> &str {
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"from toml"
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}
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fn signature(&self) -> Signature {
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Signature::build("from toml")
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}
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fn usage(&self) -> &str {
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"Parse text as .toml and create table."
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}
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async fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
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from_toml(args).await
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}
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}
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pub fn convert_toml_value_to_nu_value(v: &toml::Value, tag: impl Into<Tag>) -> Value {
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let tag = tag.into();
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let span = tag.span;
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match v {
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toml::Value::Boolean(b) => UntaggedValue::boolean(*b).into_value(tag),
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toml::Value::Integer(n) => UntaggedValue::int(*n).into_value(tag),
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toml::Value::Float(n) => UntaggedValue::decimal_from_float(*n, span).into_value(tag),
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toml::Value::String(s) => {
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UntaggedValue::Primitive(Primitive::String(String::from(s))).into_value(tag)
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}
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toml::Value::Array(a) => UntaggedValue::Table(
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a.iter()
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.map(|x| convert_toml_value_to_nu_value(x, &tag))
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.collect(),
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)
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.into_value(tag),
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toml::Value::Datetime(dt) => {
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UntaggedValue::Primitive(Primitive::String(dt.to_string())).into_value(tag)
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}
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toml::Value::Table(t) => {
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let mut collected = TaggedDictBuilder::new(&tag);
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for (k, v) in t.iter() {
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collected.insert_value(k.clone(), convert_toml_value_to_nu_value(v, &tag));
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}
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collected.into_value()
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}
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}
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}
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pub fn from_toml_string_to_value(s: String, tag: impl Into<Tag>) -> Result<Value, toml::de::Error> {
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let v: toml::Value = s.parse::<toml::Value>()?;
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Ok(convert_toml_value_to_nu_value(&v, tag))
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}
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pub async fn from_toml(args: CommandArgs) -> Result<OutputStream, ShellError> {
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let args = args.evaluate_once().await?;
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let tag = args.name_tag();
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let input = args.input;
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let concat_string = input.collect_string(tag.clone()).await?;
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Ok(
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match from_toml_string_to_value(concat_string.item, tag.clone()) {
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Ok(x) => match x {
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Value {
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value: UntaggedValue::Table(list),
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..
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} => futures::stream::iter(list.into_iter().map(ReturnSuccess::value))
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.to_output_stream(),
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x => OutputStream::one(ReturnSuccess::value(x)),
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},
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Err(_) => {
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return Err(ShellError::labeled_error_with_secondary(
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"Could not parse as TOML",
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"input cannot be parsed as TOML",
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&tag,
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"value originates from here",
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concat_string.tag,
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))
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}
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},
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)
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}
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#[cfg(test)]
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mod tests {
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use super::FromTOML;
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use super::ShellError;
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#[test]
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fn examples_work_as_expected() -> Result<(), ShellError> {
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use crate::examples::test as test_examples;
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test_examples(FromTOML {})
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}
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}
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