Make sure the directory exists before writing a file

src/main.rs

@@ -6,7 +6,7 @@ use futures_util::{
  SinkExt, StreamExt,
 };
 use tokio::{
- fs::File,
+ fs::{self, File},
  io::AsyncWriteExt,
  process::Command,
  time::{Duration, Instant},
@@ -137,10 +137,13 @@ async fn maybe_write_text_document(msg: &lsp::Message) -> Result<(), std::io::Er
  let uri = &params.text_document.uri;
  if uri.scheme() == "file" {
  if let Ok(path) = uri.to_file_path() {
- tracing::debug!("writing to {:?}", path);
- let mut file = File::create(&path).await?;
- file.write_all(text.as_bytes()).await?;
- file.flush().await?;
+ if let Some(parent) = path.parent() {
+ tracing::debug!("writing to {:?}", path);
+ fs::create_dir_all(parent).await?;
+ let mut file = File::create(&path).await?;
+ file.write_all(text.as_bytes()).await?;
+ file.flush().await?;
+ }
  }
  }
  }