nushell/src/commands/to_toml.rs

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use crate::commands::WholeStreamCommand;
use crate::data::{Primitive, Value};
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use crate::prelude::*;
pub struct ToTOML;
impl WholeStreamCommand for ToTOML {
fn name(&self) -> &str {
"to-toml"
}
fn signature(&self) -> Signature {
Signature::build("to-toml")
}
fn usage(&self) -> &str {
"Convert table into .toml text"
}
fn run(
&self,
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
to_toml(args, registry)
}
}
pub fn value_to_toml_value(v: &Tagged<Value>) -> Result<toml::Value, ShellError> {
Ok(match v.item() {
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Value::Primitive(Primitive::Boolean(b)) => toml::Value::Boolean(*b),
Value::Primitive(Primitive::Bytes(b)) => toml::Value::Integer(*b as i64),
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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())
}
Value::Primitive(Primitive::Decimal(f)) => {
toml::Value::Float(f.tagged(v.tag).coerce_into("converting to TOML float")?)
}
Value::Primitive(Primitive::Int(i)) => {
toml::Value::Integer(i.tagged(v.tag).coerce_into("converting to TOML integer")?)
}
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Value::Primitive(Primitive::Nothing) => toml::Value::String("<Nothing>".to_string()),
Value::Primitive(Primitive::Pattern(s)) => toml::Value::String(s.clone()),
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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::Table(l) => toml::Value::Array(collect_values(l)?),
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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())
}
Value::Row(o) => {
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let mut m = toml::map::Map::new();
for (k, v) in o.entries.iter() {
m.insert(k.clone(), value_to_toml_value(v)?);
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}
toml::Value::Table(m)
}
})
}
fn collect_values(input: &Vec<Tagged<Value>>) -> Result<Vec<toml::Value>, ShellError> {
let mut out = vec![];
for value in input {
out.push(value_to_toml_value(value)?);
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}
Ok(out)
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}
fn to_toml(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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let args = args.evaluate_once(registry)?;
let name_tag = args.name_tag();
let stream = async_stream_block! {
let input: Vec<Tagged<Value>> = args.input.values.collect().await;
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let to_process_input = if input.len() > 1 {
let tag = input[0].tag;
vec![Tagged { item: Value::Table(input), tag } ]
} else if input.len() == 1 {
input
} else {
vec![]
};
for value in to_process_input {
match value_to_toml_value(&value) {
Ok(toml_value) => {
match toml::to_string(&toml_value) {
Ok(x) => yield ReturnSuccess::value(
Value::Primitive(Primitive::String(x)).tagged(name_tag),
),
_ => yield Err(ShellError::labeled_error_with_secondary(
"Expected a table with TOML-compatible structure.tag() from pipeline",
"requires TOML-compatible input",
name_tag,
"originates from here".to_string(),
value.tag(),
)),
}
}
_ => yield Err(ShellError::labeled_error(
"Expected a table with TOML-compatible structure from pipeline",
"requires TOML-compatible input",
name_tag))
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}
}
};
Ok(stream.to_output_stream())
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}