globset: Implement serde::{Serialize, Deserialize} for Glob

PR #1492

crates/globset/src/serde_impl.rs

@@ -0,0 +1,38 @@
+use serde::de::Error;
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+use Glob;
+
+impl Serialize for Glob {
+    fn serialize<S: Serializer>(
+        &self,
+        serializer: S,
+    ) -> Result<S::Ok, S::Error> {
+        serializer.serialize_str(self.glob())
+    }
+}
+
+impl<'de> Deserialize<'de> for Glob {
+    fn deserialize<D: Deserializer<'de>>(
+        deserializer: D,
+    ) -> Result<Self, D::Error> {
+        let glob = <&str as Deserialize>::deserialize(deserializer)?;
+        Glob::new(glob).map_err(D::Error::custom)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use Glob;
+
+    #[test]
+    fn glob_json_works() {
+        let test_glob = Glob::new("src/**/*.rs").unwrap();
+
+        let ser = serde_json::to_string(&test_glob).unwrap();
+        assert_eq!(ser, "\"src/**/*.rs\"");
+
+        let de: Glob = serde_json::from_str(&ser).unwrap();
+        assert_eq!(test_glob, de);
+    }
+}