feat: [rust] Dynamically add uuid crate only if used (#20619)

Author: ranger-ross

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java

@@ -38,11 +38,10 @@
 import org.openapitools.codegen.CodegenConstants;
 import org.openapitools.codegen.CodegenModel;
 import org.openapitools.codegen.CodegenOperation;
-import org.openapitools.codegen.CodegenProperty;
 import org.openapitools.codegen.CodegenParameter;
+import org.openapitools.codegen.CodegenProperty;
 import org.openapitools.codegen.CodegenType;
 import org.openapitools.codegen.SupportingFile;
-import org.openapitools.codegen.VendorExtension;
 import org.openapitools.codegen.meta.features.ClientModificationFeature;
 import org.openapitools.codegen.meta.features.DocumentationFeature;
 import org.openapitools.codegen.meta.features.GlobalFeature;
@@ -109,6 +108,10 @@ public class RustClientCodegen extends AbstractRustCodegen implements CodegenCon
     protected String modelDocPath = "docs/";
     protected String apiFolder = "src/apis";
     protected String modelFolder = "src/models";
+    // The API has at least one UUID type.
+    // If the API does not contain any UUIDs we do not need depend on the `uuid` crate
+    private boolean hasUUIDs = false;
+
 
     @Override
     public CodegenType getTag() {
@@ -253,6 +256,7 @@ public RustClientCodegen() {
         supportedLibraries.put(REQWEST_LIBRARY, "HTTP client: Reqwest.");
         supportedLibraries.put(REQWEST_TRAIT_LIBRARY, "HTTP client: Reqwest (trait based).");
 
+
         CliOption libraryOption = new CliOption(CodegenConstants.LIBRARY, "library template (sub-template) to use.");
         libraryOption.setEnum(supportedLibraries);
         // set reqwest as the default
@@ -642,6 +646,13 @@ public OperationsMap postProcessOperationsWithModels(OperationsMap objs, List<Mo
                 }
             }
 
+            for (var param : operation.allParams) {
+                if (!hasUUIDs && param.isUuid) {
+                    hasUUIDs = true;
+                    break;
+                }
+            }
+
             // http method verb conversion, depending on client library (e.g. Hyper: PUT => Put, Reqwest: PUT => put)
             if (HYPER_LIBRARY.equals(getLibrary())) {
                 operation.httpMethod = StringUtils.camelize(operation.httpMethod.toLowerCase(Locale.ROOT));
@@ -705,9 +716,43 @@ public OperationsMap postProcessOperationsWithModels(OperationsMap objs, List<Mo
             }*/
         }
 
+        if (!hasUUIDs) {
+            for (var map : allModels) {
+                CodegenModel m = map.getModel();
+                if (m.getIsUuid() || hasUuidInProperties(m.vars)) {
+                    hasUUIDs = true;
+                    LOGGER.debug("found UUID in model: " + m.name);
+                    break;
+                }
+            }
+        }
+
+        this.additionalProperties.put("hasUUIDs", hasUUIDs);
         return objs;
     }
 
+    /**
+     * Recursively searches for a model's properties for a UUID type field.
+     */
+    private boolean hasUuidInProperties(List<CodegenProperty> properties) {
+        for (CodegenProperty property : properties) {
+            if (property.isUuid) {
+                return true;
+            }
+            // Check nested properties
+            if (property.items != null && hasUuidInProperties(Collections.singletonList(property.items))) {
+                return true;
+            }
+            if (property.additionalProperties != null && hasUuidInProperties(Collections.singletonList(property.additionalProperties))) {
+                return true;
+            }
+            if (property.vars != null && hasUuidInProperties(property.vars)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     @Override
     public String toDefaultValue(Schema p) {
         if (p.getDefault() != null) {

modules/openapi-generator/src/main/resources/rust/Cargo.mustache

@@ -39,7 +39,9 @@ serde_with = { version = "^3.8", default-features = false, features = ["base64",
 serde_json = "^1.0"
 serde_repr = "^0.1"
 url = "^2.5"
+{{#hasUUIDs}}
 uuid = { version = "^1.8", features = ["serde", "v4"] }
+{{/hasUUIDs}}
 {{#hyper}}
 {{#hyper0x}}
 hyper = { version = "~0.14", features = ["full"] }

samples/client/others/rust/hyper/api-with-ref-param/Cargo.toml

@@ -12,7 +12,6 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = "^1.0"
 serde_repr = "^0.1"
 url = "^2.5"
-uuid = { version = "^1.8", features = ["serde", "v4"] }
 hyper = { version = "^1.3.1", features = ["full"] }
 hyper-util = { version = "0.1.5", features = ["client", "client-legacy", "http1", "http2"] }
 http-body-util = { version = "0.1.2" }

samples/client/others/rust/hyper/composed-oneof/Cargo.toml

@@ -12,7 +12,6 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = "^1.0"
 serde_repr = "^0.1"
 url = "^2.5"
-uuid = { version = "^1.8", features = ["serde", "v4"] }
 hyper = { version = "^1.3.1", features = ["full"] }
 hyper-util = { version = "0.1.5", features = ["client", "client-legacy", "http1", "http2"] }
 http-body-util = { version = "0.1.2" }

samples/client/others/rust/hyper/emptyObject/Cargo.toml

@@ -12,7 +12,6 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = "^1.0"
 serde_repr = "^0.1"
 url = "^2.5"
-uuid = { version = "^1.8", features = ["serde", "v4"] }
 hyper = { version = "^1.3.1", features = ["full"] }
 hyper-util = { version = "0.1.5", features = ["client", "client-legacy", "http1", "http2"] }
 http-body-util = { version = "0.1.2" }

samples/client/others/rust/hyper/oneOf-array-map/Cargo.toml

@@ -12,7 +12,6 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = "^1.0"
 serde_repr = "^0.1"
 url = "^2.5"
-uuid = { version = "^1.8", features = ["serde", "v4"] }
 hyper = { version = "^1.3.1", features = ["full"] }
 hyper-util = { version = "0.1.5", features = ["client", "client-legacy", "http1", "http2"] }
 http-body-util = { version = "0.1.2" }

samples/client/others/rust/hyper/oneOf-reuseRef/Cargo.toml

@@ -11,7 +11,6 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = "^1.0"
 serde_repr = "^0.1"
 url = "^2.5"
-uuid = { version = "^1.8", features = ["serde", "v4"] }
 hyper = { version = "^1.3.1", features = ["full"] }
 hyper-util = { version = "0.1.5", features = ["client", "client-legacy", "http1", "http2"] }
 http-body-util = { version = "0.1.2" }

samples/client/others/rust/hyper/oneOf/Cargo.toml

@@ -12,7 +12,6 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = "^1.0"
 serde_repr = "^0.1"
 url = "^2.5"
-uuid = { version = "^1.8", features = ["serde", "v4"] }
 hyper = { version = "^1.3.1", features = ["full"] }
 hyper-util = { version = "0.1.5", features = ["client", "client-legacy", "http1", "http2"] }
 http-body-util = { version = "0.1.2" }

samples/client/others/rust/reqwest-regression-16119/Cargo.toml

@@ -12,5 +12,4 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = "^1.0"
 serde_repr = "^0.1"
 url = "^2.5"
-uuid = { version = "^1.8", features = ["serde", "v4"] }
 reqwest = { version = "^0.12", features = ["json", "blocking", "multipart"] }

samples/client/others/rust/reqwest/api-with-ref-param/Cargo.toml

@@ -12,5 +12,4 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = "^1.0"
 serde_repr = "^0.1"
 url = "^2.5"
-uuid = { version = "^1.8", features = ["serde", "v4"] }
 reqwest = { version = "^0.12", features = ["json", "multipart"] }