Allowing generators to be aware of original inputSpec path (#3592)

* Enabling knowledge of inputSpec path for custom generators

* Enabling knowledge of inputSpec path for custom generators

* Enabling direct use of "inputSpec" property in templates

* Fixing spaces

modules/swagger-codegen/src/main/java/io/swagger/codegen/CodegenConfig.java

@@ -79,6 +79,10 @@ public interface CodegenConfig {
 
     List<SupportingFile> supportingFiles();
 
+    String getInputSpec();
+
+    void setInputSpec(String inputSpec);
+
     String getOutputDir();
 
     void setOutputDir(String dir);

modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java

@@ -73,7 +73,8 @@ import java.util.regex.Pattern;
 
 public class DefaultCodegen {
     protected static final Logger LOGGER = LoggerFactory.getLogger(DefaultCodegen.class);
-
+    
+    protected String inputSpec;
     protected String outputFolder = "";
     protected Set<String> defaultIncludes = new HashSet<String>();
     protected Map<String, String> typeMapping = new HashMap<String, String>();
@@ -507,6 +508,14 @@ public class DefaultCodegen {
         return outputFolder();
     }
 
+    public String getInputSpec() {
+        return inputSpec;
+    }
+
+    public void setInputSpec(String inputSpec) {
+        this.inputSpec = inputSpec;
+    }
+
     public void setTemplateDir(String templateDir) {
         this.templateDir = templateDir;
     }

modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultGenerator.java

@@ -140,7 +140,8 @@ public class DefaultGenerator extends AbstractGenerator implements Generator {
 
         config.additionalProperties().put("generatedDate", DateTime.now().toString());
         config.additionalProperties().put("generatorClass", config.getClass().toString());
-
+        config.additionalProperties().put("inputSpec", config.getInputSpec());
+        
         if (swagger.getInfo() != null) {
             Info info = swagger.getInfo();
             if (info.getTitle() != null) {

modules/swagger-codegen/src/main/java/io/swagger/codegen/config/CodegenConfigurator.java

@@ -352,6 +352,7 @@ public class CodegenConfigurator {
 
         CodegenConfig config = CodegenConfigLoader.forName(lang);
 
+        config.setInputSpec(inputSpec);
         config.setOutputDir(outputDir);
         config.setSkipOverwrite(skipOverwrite);