Mark Silex server generator as deprecated (#6220)

Quote from Silex package on Packagist:
https://packagist.org/packages/silex/silex
WARNING: Silex is in maintenance mode only. Ends of life is set to June
2018. Read more on https://symfony.com/blog/the-end-of-silex.

bin/ci/php-silex-petstore-server.json

@@ -1,5 +1,5 @@
 {
-  "generatorName": "php-silex",
+  "generatorName": "php-silex-deprecated",
   "inputSpec": "modules/openapi-generator/src/test/resources/2_0/petstore.yaml",
   "outputDir": "samples/server/petstore/php-silex/OpenAPIServer",
   "templateDir": "modules/openapi-generator/src/main/resources/php-silex"

bin/openapi3/php-silex-petstore-server.sh

@@ -27,6 +27,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="generate -t modules/openapi-generator/src/main/resources/php-silex -i modules/openapi-generator/src/test/resources/3_0/petstore.yaml -g php-silex -o samples/server/petstore/php-silex/OpenAPIServer $@"
+ags="generate -t modules/openapi-generator/src/main/resources/php-silex -i modules/openapi-generator/src/test/resources/3_0/petstore.yaml -g php-silex-deprecated -o samples/server/petstore/php-silex/OpenAPIServer $@"
 
 java $JAVA_OPTS -jar $executable $ags

bin/php-silex-petstore-server.sh

@@ -27,6 +27,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="generate -t modules/openapi-generator/src/main/resources/php-silex -i modules/openapi-generator/src/test/resources/2_0/petstore.yaml -g php-silex -o samples/server/petstore/php-silex/OpenAPIServer $@"
+ags="generate -t modules/openapi-generator/src/main/resources/php-silex -i modules/openapi-generator/src/test/resources/2_0/petstore.yaml -g php-silex-deprecated -o samples/server/petstore/php-silex/OpenAPIServer $@"
 
 java $JAVA_OPTS -jar $executable $ags

bin/windows/php-silex-petstore-server.bat

@@ -5,6 +5,6 @@ If Not Exist %executable% (
 )
 
 REM set JAVA_OPTS=%JAVA_OPTS% -Xmx1024M
-set ags=generate -i modules\openapi-generator\src\test\resources\2_0\petstore.yaml -g php-silex -o samples\server\petstore\php-silex\OpenAPIServer
+set ags=generate -i modules\openapi-generator\src\test\resources\2_0\petstore.yaml -g php-silex-deprecated -o samples\server\petstore\php-silex\OpenAPIServer
 
 java %JAVA_OPTS% -jar %executable% %ags%

docs/generators.md

@@ -108,7 +108,7 @@ The following generators are available:
 * [nodejs-server-deprecated (deprecated)](generators/nodejs-server-deprecated.md)  
 * [php-laravel](generators/php-laravel.md)  
 * [php-lumen](generators/php-lumen.md)  
-* [php-silex](generators/php-silex.md)  
+* [php-silex-deprecated (deprecated)](generators/php-silex-deprecated.md)  
 * [php-slim-deprecated (deprecated)](generators/php-slim-deprecated.md)  
 * [php-slim4](generators/php-slim4.md)  
 * [php-symfony](generators/php-symfony.md)  

docs/generators/php-silex-deprecated.md

@@ -1,6 +1,6 @@
 ---
-title: Config Options for php-silex
+title: Config Options for php-silex-deprecated
-sidebar_label: php-silex
+sidebar_label: php-silex-deprecated
 ---
 
 | Option | Description | Values | Default |

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

@@ -23,6 +23,8 @@ import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.*;
 import org.openapitools.codegen.meta.features.*;
 import org.openapitools.codegen.utils.ModelUtils;
+import org.openapitools.codegen.meta.GeneratorMetadata;
+import org.openapitools.codegen.meta.Stability;
 
 import java.io.File;
 import java.util.*;
@@ -39,6 +41,10 @@ public class PhpSilexServerCodegen extends DefaultCodegen implements CodegenConf
     public PhpSilexServerCodegen() {
         super();
 
+        generatorMetadata = GeneratorMetadata.newBuilder(generatorMetadata)
+                .stability(Stability.DEPRECATED)
+                .build();
+
         modifyFeatureSet(features -> features
                 .includeDocumentationFeatures(DocumentationFeature.Readme)
                 .wireFormatFeatures(EnumSet.of(WireFormatFeature.JSON, WireFormatFeature.XML))
@@ -136,15 +142,13 @@ public class PhpSilexServerCodegen extends DefaultCodegen implements CodegenConf
     }
 
     @Override
-    public String getName()
+    public String getName() {
-
+        return "php-silex-deprecated";
-    {
-        return "php-silex";
     }
 
     @Override
     public String getHelp() {
-        return "Generates a PHP Silex server library.";
+        return "Generates a PHP Silex server library. IMPORTANT NOTE: this generator is no longer actively maintained.";
     }
 
     @Override