Merge pull request #8737 from swagger-api/generator-issue-178

added option to choose template engine.

Author: HugoMario

modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/v3/cli/cmd/Generate.java

@@ -1,6 +1,7 @@
 package io.swagger.codegen.v3.cli.cmd;
 
 import com.fasterxml.jackson.databind.JsonNode;
+import io.swagger.codegen.v3.CodegenConstants;
 import io.swagger.codegen.v3.cli.CLIHelper;
 import io.swagger.codegen.v3.ClientOptInput;
 import io.swagger.codegen.v3.CodegenArgument;
@@ -47,6 +48,7 @@ public class Generate implements Runnable {
     protected String spec;
     protected String templateDir;
     protected String templateVersion;
+    protected String templateEngine;
     protected String auth;
     protected List<String> systemProperties = new ArrayList<>();
     protected String configFile;
@@ -99,6 +101,10 @@ public void setTemplateVersion(String templateVersion) {
         this.templateVersion = templateVersion;
     }
 
+    public void setTemplateEngine(String templateEngine) {
+        this.templateEngine = templateEngine;
+    }
+
     public void setAuth(String auth) {
         this.auth = auth;
     }
@@ -318,6 +324,12 @@ public void run() {
             configurator.setCodegenArguments(codegenArguments);
         }
 
+        if (CodegenConstants.HANDLEBARS_TEMPLATE_ENGINE.equalsIgnoreCase(templateEngine)) {
+            additionalProperties.add(String.format("%s=%s", CodegenConstants.TEMPLATE_ENGINE, CodegenConstants.HANDLEBARS_TEMPLATE_ENGINE));
+        } else {
+            additionalProperties.add(String.format("%s=%s", CodegenConstants.TEMPLATE_ENGINE, CodegenConstants.MUSTACHE_TEMPLATE_ENGINE));
+        }
+
         applySystemPropertiesKvpList(systemProperties, configurator);
         applyInstantiationTypesKvpList(instantiationTypes, configurator);
         applyImportMappingsKvpList(importMappings, configurator);

modules/swagger-codegen-cli/src/main/resources/oas3.yaml

@@ -50,6 +50,11 @@ components:
           title: "template version"
           description: "version of the template used on generation."
           x-option: "--template-version"
+        templateEngine:
+          type: "string"
+          title: "template engine"
+          description: "template engine to generate files, currently supported: 'mustache' and 'handlebars'."
+          x-option: "--template-engine"
         auth:
           type: "string"
           title: "authorization"

modules/swagger-codegen-cli/src/test/java/io/swagger/codegen/v3/cli/cmd/GenerateTest.java

@@ -623,7 +623,7 @@ public void testExternalArgumentsFromFile() throws Exception {
 
         Assert.assertEquals(generate.lang, "java");
         Assert.assertEquals(generate.library, "jersey2");
-        Assert.assertEquals(generate.additionalProperties.size(), 2);
+        Assert.assertEquals(generate.additionalProperties.size(), 3);
         Assert.assertEquals(generate.additionalProperties.get(0), "serializableModel=true");
         Assert.assertEquals(generate.additionalProperties.get(1), "withXml=true");
 
@@ -636,7 +636,7 @@ public void testExternalArgumentsFromFile() throws Exception {
 
         Assert.assertEquals(generate.lang, "java");
         Assert.assertEquals(generate.library, "jersey2");
-        Assert.assertEquals(generate.additionalProperties.size(), 2);
+        Assert.assertEquals(generate.additionalProperties.size(), 3);
         Assert.assertEquals(generate.additionalProperties.get(0), "serializableModel=true");
         Assert.assertEquals(generate.additionalProperties.get(1), "withXml=true");
     }

modules/swagger-codegen/src/main/java/io/swagger/codegen/v3/CodegenConstants.java

@@ -230,6 +230,8 @@ public static enum ENUM_PROPERTY_NAMING_TYPE {camelCase, PascalCase, snake_case,
     public static final String USE_OAS2 = "useOas2";
     public static final String USE_OAS2_DESC = "use OpenAPI v2.0 (Swagger 1.5.x)";
 
+    public static final String TEMPLATE_ENGINE = "templateEngine";
+
     public static final String IS_ENUM_EXT_NAME = PREFIX_IS + "enum";
     public static final String IS_ALIAS_EXT_NAME = PREFIX_IS + "alias";
     public static final String IS_ARRAY_MODEL_EXT_NAME = PREFIX_IS + "array-model";
@@ -323,4 +325,7 @@ public static enum ENUM_PROPERTY_NAMING_TYPE {camelCase, PascalCase, snake_case,
     public static final String API_TESTS_OPTION = "--api-tests";
     public static final String USE_OAS2_OPTION = "--use-oas2";
 
+    public static final String HANDLEBARS_TEMPLATE_ENGINE = "handlebars";
+    public static final String MUSTACHE_TEMPLATE_ENGINE = "mustache";
+
 }