[cpp-pistache] add the option to fetch dependencies (#495)

* Add the Possibility to fetch dependencies needed by the generated code

* Fix typo

* Make External Libraries default to false

* Add parameter string to the javadoc comment

Author: etherealjoy

bin/cpp-pistache-server-petstore.sh

@@ -27,6 +27,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="generate -g cpp-pistache-server -i modules/openapi-generator/src/test/resources/2_0/petstore.yaml -o samples/server/petstore/cpp-pistache $@"
+ags="generate -g cpp-pistache-server -t modules/openapi-generator/src/main/resources/cpp-pistache-server -i modules/openapi-generator/src/test/resources/2_0/petstore.yaml -o samples/server/petstore/cpp-pistache $@"
 
 java $JAVA_OPTS -jar $executable $ags

bin/openapi3/cpp-pistache-server-petstore.sh

@@ -27,6 +27,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="generate -g cpp-pistache-server -i modules/openapi-generator/src/test/resources/3_0/petstore.yaml -o samples/server/petstore/cpp-pistache $@"
+ags="generate -g cpp-pistache-server -t modules/openapi-generator/src/main/resources/cpp-pistache-server -i modules/openapi-generator/src/test/resources/3_0/petstore.yaml -o samples/server/petstore/cpp-pistache $@"
 
 java $JAVA_OPTS -jar $executable $ags

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

@@ -43,7 +43,9 @@
 
 public class CppPistacheServerCodegen extends AbstractCppCodegen {
     protected String implFolder = "impl";
-
+    protected boolean isAddExternalLibs = false;
+    public static final String OPTIONAL_EXTERNAL_LIB = "addExternalLibs";
+    public static final String OPTIONAL_EXTERNAL_LIB_DESC = "Add the Possibility to fetch and compile external Libraries needed by this Framework.";
     @Override
     public CodegenType getTag() {
         return CodegenType.SERVER;
@@ -77,6 +79,7 @@ public CppPistacheServerCodegen() {
         embeddedTemplateDir = templateDir = "cpp-pistache-server";
 
         cliOptions.clear();
+        addSwitch(OPTIONAL_EXTERNAL_LIB, OPTIONAL_EXTERNAL_LIB_DESC, this.isAddExternalLibs);
 
         reservedWords = new HashSet<>();
 
@@ -118,7 +121,12 @@ public void processOpts() {
         additionalProperties.put("modelNamespaceDeclarations", modelPackage.split("\\."));
         additionalProperties.put("modelNamespace", modelPackage.replaceAll("\\.", "::"));
         additionalProperties.put("apiNamespaceDeclarations", apiPackage.split("\\."));
-        additionalProperties.put("apiNamespace", apiPackage.replaceAll("\\.", "::"));
+        additionalProperties.put("apiNamespace", apiPackage.replaceAll("\\.", "::"));   
+        if (additionalProperties.containsKey(OPTIONAL_EXTERNAL_LIB)) {
+            setAddExternalLibs(convertPropertyToBooleanAndWriteBack(OPTIONAL_EXTERNAL_LIB));
+        } else {
+            additionalProperties.put(OPTIONAL_EXTERNAL_LIB, isAddExternalLibs);
+        }
     }
 
     /**
@@ -410,9 +418,17 @@ public String escapeQuotationMark(String input) {
     public String escapeUnsafeCharacters(String input) {
         return input.replace("*/", "*_/").replace("/*", "/_*");
     }
-    
+
     @Override
     public String getTypeDeclaration(String str) {
         return toModelName(str);
     }
+
+    /**
+     * Specify whether external libraries will be added during the generation 
+     * @param value the value to be set
+     */
+    public void setAddExternalLibs(boolean value){
+        isAddExternalLibs = value;   
+    }
 }

modules/openapi-generator/src/main/resources/cpp-pistache-server/cmake.mustache

@@ -4,6 +4,26 @@ project(server)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -pg -g3" )
 
+{{#addExternalLibs}}
+include(ExternalProject)
+
+set(EXTERNAL_INSTALL_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/external)
+
+ExternalProject_Add(PISTACHE
+    GIT_REPOSITORY https://github.com/oktal/pistache.git
+    CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${EXTERNAL_INSTALL_LOCATION}
+)
+
+ExternalProject_Add(NLOHMANN
+    GIT_REPOSITORY https://github.com/nlohmann/json.git
+    CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${EXTERNAL_INSTALL_LOCATION}
+
+)
+include_directories(${EXTERNAL_INSTALL_LOCATION}/include)
+include_directories(${EXTERNAL_INSTALL_LOCATION}/include/nlohmann)
+link_directories(${EXTERNAL_INSTALL_LOCATION}/lib)
+{{/addExternalLibs}}
+
 link_directories(/usr/local/lib/)
 
 aux_source_directory(model MODEL_SOURCES)

samples/server/petstore/cpp-pistache/CMakeLists.txt

@@ -4,6 +4,7 @@ project(server)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -pg -g3" )
 
+
 link_directories(/usr/local/lib/)
 
 aux_source_directory(model MODEL_SOURCES)