lints: Enforce sorted order for enum variants

To avoid wasting time re-sorting these things (CL:1492612).

https://docs.rs/remain

Disclaimer: I wrote the macro.

This CL adds #[sorted] attributes to those Error enums that seemed to
have made some effort to be in sorted order.

TEST=cargo check
TEST=cargo check --all-features
TEST=cargo check --target aarch64-unknown-linux-gnu
TEST=emerge-nami crosvm
TEST=local kokoro
CQ-DEPEND=CL:1524247

Change-Id: I89685ced05e2f149fa189ca509bc14c70aebb531
Reviewed-on: https://chromium-review.googlesource.com/1515998
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: David Tolnay <dtolnay@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: David Tolnay <dtolnay@chromium.org>

1 files changed, 8 insertions, 4 deletions

diff --git a/src/plugin/mod.rs b/src/plugin/mod.rs
index 052b057..f37f2eb 100644
--- a/src/plugin/mod.rs
+++ b/src/plugin/mod.rs
@@ -23,6 +23,7 @@ use libc::{
 };
 
 use protobuf::ProtobufError;
+use remain::sorted;
 
 use io_jail::{self, Minijail};
 use kvm::{Datamatch, IoeventAddress, Kvm, Vcpu, VcpuExit, Vm};
@@ -41,6 +42,7 @@ const MAX_DATAGRAM_SIZE: usize = 4096;
 const MAX_VCPU_DATAGRAM_SIZE: usize = 0x40000;
 
 /// An error that occurs during the lifetime of a plugin process.
+#[sorted]
 pub enum Error {
     CloneEventFd(SysError),
     CloneVcpuSocket(io::Error),
@@ -95,18 +97,20 @@ pub enum Error {
     },
     SignalFd(SignalFdError),
     SpawnVcpu(io::Error),
+    TapEnable(TapError),
     TapOpen(TapError),
     TapSetIp(TapError),
-    TapSetNetmask(TapError),
     TapSetMacAddress(TapError),
-    TapEnable(TapError),
+    TapSetNetmask(TapError),
     ValidateTapFd(SysError),
 }
 
 impl Display for Error {
+    #[remain::check]
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         use self::Error::*;
 
+        #[sorted]
         match self {
             CloneEventFd(e) => write!(f, "failed to clone eventfd: {}", e),
             CloneVcpuSocket(e) => write!(f, "failed to clone vcpu socket: {}", e),
@@ -160,11 +164,11 @@ impl Display for Error {
             ),
             SignalFd(e) => write!(f, "failed to read signal fd: {}", e),
             SpawnVcpu(e) => write!(f, "error spawning vcpu thread: {}", e),
+            TapEnable(e) => write!(f, "error enabling tap device: {}", e),
             TapOpen(e) => write!(f, "error opening tap device: {}", e),
             TapSetIp(e) => write!(f, "error setting tap ip: {}", e),
-            TapSetNetmask(e) => write!(f, "error setting tap netmask: {}", e),
             TapSetMacAddress(e) => write!(f, "error setting tap mac address: {}", e),
-            TapEnable(e) => write!(f, "error enabling tap device: {}", e),
+            TapSetNetmask(e) => write!(f, "error setting tap netmask: {}", e),
             ValidateTapFd(e) => write!(f, "failed to validate raw tap fd: {}", e),
         }
     }