1 files changed, 31 insertions, 5 deletions
diff --git a/cli/diagnostics.rs b/cli/diagnostics.rs
index 1cd4ea234..ba21e5aa9 100644
--- a/cli/diagnostics.rs
+++ b/cli/diagnostics.rs
@@ -2,9 +2,11 @@
 
 use crate::colors;
 
+use deno_core::serde::Deserialize;
+use deno_core::serde::Deserializer;
+use deno_core::serde::Serialize;
+use deno_core::serde::Serializer;
 use regex::Regex;
-use serde::Deserialize;
-use serde::Deserializer;
 use std::error::Error;
 use std::fmt;
 
@@ -157,6 +159,21 @@ impl<'de> Deserialize<'de> for DiagnosticCategory {
   }
 }
 
+impl Serialize for DiagnosticCategory {
+  fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+  where
+    S: Serializer,
+  {
+    let value = match self {
+      DiagnosticCategory::Warning => 0 as i32,
+      DiagnosticCategory::Error => 1 as i32,
+      DiagnosticCategory::Suggestion => 2 as i32,
+      DiagnosticCategory::Message => 3 as i32,
+    };
+    Serialize::serialize(&value, serializer)
+  }
+}
+
 impl From<i64> for DiagnosticCategory {
   fn from(value: i64) -> Self {
     match value {
@@ -169,7 +186,7 @@ impl From<i64> for DiagnosticCategory {
   }
 }
 
-#[derive(Debug, Deserialize, Clone, Eq, PartialEq)]
+#[derive(Debug, Deserialize, Serialize, Clone, Eq, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub struct DiagnosticMessageChain {
   message_text: String,
@@ -196,14 +213,14 @@ impl DiagnosticMessageChain {
   }
 }
 
-#[derive(Debug, Deserialize, Clone, Eq, PartialEq)]
+#[derive(Debug, Deserialize, Serialize, Clone, Eq, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub struct Position {
   pub line: u64,
   pub character: u64,
 }
 
-#[derive(Debug, Deserialize, Clone, Eq, PartialEq)]
+#[derive(Debug, Deserialize, Serialize, Clone, Eq, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub struct Diagnostic {
   pub category: DiagnosticCategory,
@@ -367,6 +384,15 @@ impl<'de> Deserialize<'de> for Diagnostics {
   }
 }
 
+impl Serialize for Diagnostics {
+  fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+  where
+    S: Serializer,
+  {
+    Serialize::serialize(&self.0, serializer)
+  }
+}
+
 impl fmt::Display for Diagnostics {
   fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
     let mut i = 0;