Format Rust code on main (pantsbuild#20034)

Fixes pantsbuild#19892.

build-support/preambles/config.yaml

@@ -8,21 +8,21 @@
   #![deny(warnings)]
   // Enable all clippy lints except for many of the pedantic ones. It's a shame this needs to be copied and pasted across crates, but there doesn't appear to be a way to include inner attributes from a common source.
   #![deny(
-    clippy::all,
-    clippy::default_trait_access,
-    clippy::expl_impl_clone_on_copy,
-    clippy::if_not_else,
-    clippy::needless_continue,
-    clippy::unseparated_literal_suffix,
-    clippy::used_underscore_binding
+      clippy::all,
+      clippy::default_trait_access,
+      clippy::expl_impl_clone_on_copy,
+      clippy::if_not_else,
+      clippy::needless_continue,
+      clippy::unseparated_literal_suffix,
+      clippy::used_underscore_binding
   )]
   // It is often more clear to show that nothing is being moved.
   #![allow(clippy::match_ref_pats)]
   // Subjective style.
   #![allow(
-    clippy::len_without_is_empty,
-    clippy::redundant_field_names,
-    clippy::too_many_arguments
+      clippy::len_without_is_empty,
+      clippy::redundant_field_names,
+      clippy::too_many_arguments
   )]
   // Default isn't as big a deal as people seem to think it is.
   #![allow(clippy::new_without_default, clippy::new_ret_no_self)]

src/rust/engine/address/src/lib.rs

@@ -4,39 +4,39 @@
 #![deny(warnings)]
 // Enable all clippy lints except for many of the pedantic ones. It's a shame this needs to be copied and pasted across crates, but there doesn't appear to be a way to include inner attributes from a common source.
 #![deny(
-  clippy::all,
-  clippy::default_trait_access,
-  clippy::expl_impl_clone_on_copy,
-  clippy::if_not_else,
-  clippy::needless_continue,
-  clippy::unseparated_literal_suffix,
-  clippy::used_underscore_binding
+    clippy::all,
+    clippy::default_trait_access,
+    clippy::expl_impl_clone_on_copy,
+    clippy::if_not_else,
+    clippy::needless_continue,
+    clippy::unseparated_literal_suffix,
+    clippy::used_underscore_binding
 )]
 // It is often more clear to show that nothing is being moved.
 #![allow(clippy::match_ref_pats)]
 // Subjective style.
 #![allow(
-  clippy::len_without_is_empty,
-  clippy::redundant_field_names,
-  clippy::too_many_arguments
+    clippy::len_without_is_empty,
+    clippy::redundant_field_names,
+    clippy::too_many_arguments
 )]
 // Default isn't as big a deal as people seem to think it is.
 #![allow(clippy::new_without_default, clippy::new_ret_no_self)]
 // Arc<Mutex> can be more clear than needing to grok Orderings:
 #![allow(clippy::mutex_atomic)]
 
 pub struct AddressInput<'a> {
-  pub path: &'a str,
-  pub target: Option<&'a str>,
-  pub generated: Option<&'a str>,
-  pub parameters: Vec<(&'a str, &'a str)>,
+    pub path: &'a str,
+    pub target: Option<&'a str>,
+    pub generated: Option<&'a str>,
+    pub parameters: Vec<(&'a str, &'a str)>,
 }
 
 pub struct SpecInput<'a> {
-  /// The address (or literal, if no target/generated/parameters were specified) portion.
-  pub address: AddressInput<'a>,
-  /// If a spec wildcard was specified (`:` or `::`), its value.
-  pub wildcard: Option<&'a str>,
+    /// The address (or literal, if no target/generated/parameters were specified) portion.
+    pub address: AddressInput<'a>,
+    /// If a spec wildcard was specified (`:` or `::`), its value.
+    pub wildcard: Option<&'a str>,
 }
 
 peg::parser! {
@@ -90,5 +90,5 @@ peg::parser! {
 }
 
 pub fn parse_address_spec(value: &str) -> Result<SpecInput, String> {
-  parsers::spec(value).map_err(|e| format!("Failed to parse address spec `{value}`: {e}"))
+    parsers::spec(value).map_err(|e| format!("Failed to parse address spec `{value}`: {e}"))
 }

src/rust/engine/async_latch/src/lib.rs

@@ -4,21 +4,21 @@
 #![deny(warnings)]
 // Enable all clippy lints except for many of the pedantic ones. It's a shame this needs to be copied and pasted across crates, but there doesn't appear to be a way to include inner attributes from a common source.
 #![deny(
-  clippy::all,
-  clippy::default_trait_access,
-  clippy::expl_impl_clone_on_copy,
-  clippy::if_not_else,
-  clippy::needless_continue,
-  clippy::unseparated_literal_suffix,
-  clippy::used_underscore_binding
+    clippy::all,
+    clippy::default_trait_access,
+    clippy::expl_impl_clone_on_copy,
+    clippy::if_not_else,
+    clippy::needless_continue,
+    clippy::unseparated_literal_suffix,
+    clippy::used_underscore_binding
 )]
 // It is often more clear to show that nothing is being moved.
 #![allow(clippy::match_ref_pats)]
 // Subjective style.
 #![allow(
-  clippy::len_without_is_empty,
-  clippy::redundant_field_names,
-  clippy::too_many_arguments
+    clippy::len_without_is_empty,
+    clippy::redundant_field_names,
+    clippy::too_many_arguments
 )]
 // Default isn't as big a deal as people seem to think it is.
 #![allow(clippy::new_without_default, clippy::new_ret_no_self)]
@@ -40,45 +40,45 @@ use tokio::sync::watch;
 ///
 #[derive(Clone)]
 pub struct AsyncLatch {
-  sender: Arc<Mutex<Option<watch::Sender<()>>>>,
-  receiver: watch::Receiver<()>,
+    sender: Arc<Mutex<Option<watch::Sender<()>>>>,
+    receiver: watch::Receiver<()>,
 }
 
 impl AsyncLatch {
-  pub fn new() -> AsyncLatch {
-    let (sender, receiver) = watch::channel(());
-    AsyncLatch {
-      sender: Arc::new(Mutex::new(Some(sender))),
-      receiver,
+    pub fn new() -> AsyncLatch {
+        let (sender, receiver) = watch::channel(());
+        AsyncLatch {
+            sender: Arc::new(Mutex::new(Some(sender))),
+            receiver,
+        }
     }
-  }
 
-  ///
-  /// Mark this latch triggered, releasing all threads that are waiting for it to trigger.
-  ///
-  /// All calls to trigger after the first one are noops.
-  ///
-  pub fn trigger(&self) {
-    // To trigger the latch, we drop the Sender.
-    self.sender.lock().take();
-  }
+    ///
+    /// Mark this latch triggered, releasing all threads that are waiting for it to trigger.
+    ///
+    /// All calls to trigger after the first one are noops.
+    ///
+    pub fn trigger(&self) {
+        // To trigger the latch, we drop the Sender.
+        self.sender.lock().take();
+    }
 
-  ///
-  /// Wait for another thread to trigger this latch.
-  ///
-  pub async fn triggered(&self) {
-    // To see whether the latch is triggered, we clone the receiver, and then wait for our clone to
-    // return an Err, indicating that the Sender has been dropped.
-    let mut receiver = self.receiver.clone();
-    while receiver.changed().await.is_ok() {}
-  }
+    ///
+    /// Wait for another thread to trigger this latch.
+    ///
+    pub async fn triggered(&self) {
+        // To see whether the latch is triggered, we clone the receiver, and then wait for our clone to
+        // return an Err, indicating that the Sender has been dropped.
+        let mut receiver = self.receiver.clone();
+        while receiver.changed().await.is_ok() {}
+    }
 
-  ///
-  /// Return true if the latch has been triggered.
-  ///
-  pub fn poll_triggered(&self) -> bool {
-    self.sender.lock().is_none()
-  }
+    ///
+    /// Return true if the latch has been triggered.
+    ///
+    pub fn poll_triggered(&self) -> bool {
+        self.sender.lock().is_none()
+    }
 }
 
 #[cfg(test)]

src/rust/engine/async_latch/src/tests.rs

@@ -8,21 +8,21 @@ use crate::AsyncLatch;
 
 #[tokio::test]
 async fn basic() {
-  let latch = AsyncLatch::new();
+    let latch = AsyncLatch::new();
 
-  let mut join = tokio::spawn({
-    let latch = latch.clone();
-    async move { latch.triggered().await }
-  });
+    let mut join = tokio::spawn({
+        let latch = latch.clone();
+        async move { latch.triggered().await }
+    });
 
-  // Ensure that `triggered` doesn't return until `trigger` has been called.
-  tokio::select! {
-    _ = sleep(Duration::from_secs(1)) => {},
-    _ = &mut join => { panic!("Background task should have continued to wait.") }
-  }
-  latch.trigger();
-  join.await.unwrap();
+    // Ensure that `triggered` doesn't return until `trigger` has been called.
+    tokio::select! {
+      _ = sleep(Duration::from_secs(1)) => {},
+      _ = &mut join => { panic!("Background task should have continued to wait.") }
+    }
+    latch.trigger();
+    join.await.unwrap();
 
-  // And that calling `trigger` again is harmless.
-  latch.trigger();
+    // And that calling `trigger` again is harmless.
+    latch.trigger();
 }