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use anyhow::Result;
use proc_macro2::TokenStream;
use std::fs;
use std::io::Write;
use std::path::Path;
pub fn write<P: AsRef<Path>>(path: P, content: TokenStream) -> Result<()> {
let mut formatted = Vec::new();
writeln!(
formatted,
"// This file is @generated by syn-internal-codegen."
)?;
writeln!(formatted, "// It is not intended for manual editing.")?;
writeln!(formatted)?;
let mut config = rustfmt::Config::default();
config.set().emit_mode(rustfmt::EmitMode::Stdout);
config.set().verbose(rustfmt::Verbosity::Quiet);
config.set().format_macro_matchers(true);
config.set().normalize_doc_attributes(true);
let mut session = rustfmt::Session::new(config, Some(&mut formatted));
session.format(rustfmt::Input::Text(content.to_string()))?;
drop(session);
if path.as_ref().is_file() && fs::read(&path)? == formatted {
return Ok(());
}
fs::write(path, formatted)?;
Ok(())
}
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