From 41961ce218748ed6efe6c9103c5917c2dfc76de1 Mon Sep 17 00:00:00 2001
From: Jiahao XU <Jiahao_XU@outlook.com>
Date: Tue, 12 Jul 2022 17:03:12 +1000
Subject: [PATCH] Add new variant `BinstallError::DuplicateVersionReq`

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>
---
 src/errors.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/errors.rs b/src/errors.rs
index 4c7e5cad..4db5cdd1 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -182,6 +182,12 @@ pub enum BinstallError {
         help("You specified `--version {req}` but the package resolved that to '{ver}'.\nUse `--version '={req}'` if you want an exact match.")
     )]
     VersionWarning { ver: String, req: String },
+
+    /// This occurs when you specified `--version` while also using
+    /// form `$crate_name@$ver` tp specify version requirements.
+    #[error("duplicate version requirements")]
+    #[diagnostic(severity(error), code(binstall::version::requirement))]
+    DuplicateVersionReq,
 }
 
 impl BinstallError {
@@ -209,6 +215,7 @@ impl BinstallError {
             VersionMismatch { .. } => 82,
             VersionUnavailable { .. } => 83,
             VersionWarning { .. } => unimplemented!("BUG: warnings do not terminate"),
+            DuplicateVersionReq => 84,
         };
 
         // reserved codes