fix: make optional inputs actually optional.

src/main.rs

@@ -170,11 +170,13 @@ async fn in_(input: model::InInput, dest: &Path) -> Result<model::InOutput> {
         },
         metadata: vec![],
     };
-    if out.version != input.version {
-        return Err(anyhow!(format!(
-            "Did not get correct version of resource, requested '{:?}', got '{:?}'",
-            input.version, out.version
-        )));
+    if let Some(input_version) = &input.version {
+        if out.version != *input_version {
+            return Err(anyhow!(format!(
+                "Did not get correct version of resource, requested '{:?}', got '{:?}'",
+                input.version, out.version
+            )));
+        }
     }
     Ok(out)
 }
@@ -189,7 +191,7 @@ async fn out(input: model::OutInput, src: &Path) -> Result<model::OutOutput> {
     response.error_for_status()?;
     let version = check(model::CheckInput {
         source: input.source.clone(),
-        version: model::Version::None,
+        version: None,
     })
     .await?
     .0[0]

src/model.rs

@@ -150,19 +150,22 @@ pub struct Params {
 #[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
 pub struct CheckInput {
     pub source: Source,
-    pub version: Version,
+    #[serde(default)]
+    pub version: Option<Version>,
 }
 
 #[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
 pub struct InInput {
     pub source: Source,
-    pub version: Version,
+    pub version: Option<Version>,
+    #[serde(default)]
     pub params: Params,
 }
 
 #[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
 pub struct OutInput {
     pub source: Source,
+    #[serde(default)]
     pub params: Params,
 }