Look for the external formatter before invoking it (#3670)

Currently it is not possible to save a file with a language that
has an external formatter configuration unless the external
formatter is installed, even if the language has a Language Server
configuration capable of auto-format. This change checks that the
external formatter exists before using it to create a formatting
callback.
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Michael Davis 2 years ago committed by GitHub
parent 0d76775453
commit f0d1caafcf
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@ -407,7 +407,11 @@ impl Document {
// We can't use anyhow::Result here since the output of the future has to be
// clonable to be used as shared future. So use a custom error type.
pub fn format(&self) -> Option<BoxFuture<'static, Result<Transaction, FormatterError>>> {
if let Some(formatter) = self.language_config().and_then(|c| c.formatter.clone()) {
if let Some(formatter) = self
.language_config()
.and_then(|c| c.formatter.clone())
.filter(|formatter| which::which(&formatter.command).is_ok())
{
use std::process::Stdio;
let text = self.text().clone();
let mut process = tokio::process::Command::new(&formatter.command);

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