contrib/objcwrapper: add the -o option to specify the output file

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/contrib/objcwrapper/src/objc_generator.nit b/contrib/objcwrapper/src/objc_generator.nit
index 673e306..3b50721 100644 (file)
--- a/contrib/objcwrapper/src/objc_generator.nit
+++ b/contrib/objcwrapper/src/objc_generator.nit
@@ -15,8 +15,15 @@
 # Code generation
 module objc_generator
 
+import opts
+
 import objc_model
 
+redef class Sys
+       # Path to the output file
+       var opt_output = new OptionString("Output file", "-o")
+end
+
 class CodeGenerator
        # Merge the calls to `alloc` and `init...` in a single constructor?
        #
@@ -34,11 +41,25 @@ class CodeGenerator
        var init_with_alloc = true is writable
 
        fun generator(classes: Array[nullable ObjcClass]) do
+               # Open specified path or stdin
+               var file
+               var path = opt_output.value
+               if path != null then
+                       if path.file_extension != "nit" then
+                               print_error "Warning: output file path does not end with '.nit'"
+                       end
+
+                       file = new FileWriter.open(path)
+               else
+                       file = stdout
+               end
+
+               # Generate code
                for classe in classes do
-                       var file = new FileWriter.open(classe.name + ".nit")
                        nit_class_generator(classe, file, init_with_alloc)
-                       file.close
                end
+
+               if path != null then file.close
        end
 
        fun type_convertor(type_word: String): String do