"Create SuggestedColors file" option not working and automatically converts project to XML format

[bagage]

This seems to be project specific, but at least I can reproduce it 100% time on Linphone project.

Steps to reproduce:

• Clone project: git clone https://github.com/BelledonneCommunications/linphone-iphone.git --depth 1
• Open it in XCode: open linphone-iphone/linphone.xcodeproj
• Select Edit -> Create SuggestedColors file
• Nothing appears except that:
  • Option Edit -> Create SuggestedColors file disappeared
  • Filelinphone.xcodeproj/project.pbxproj has been converted from JSON structure to XML structure

Expected: a file should have been created at the root of Linphone project and xcode project structure not modified. Any know issue about that?

[bagage]

Regarding automatic json to XML conversion, this is probably caused by SuggestedColors.m:260:

NSData  *dicDat = [NSPropertyListSerialization dataWithPropertyList:dictionary format:NSPropertyListXMLFormat_v1_0 options:0 error:&error];

It seems that there is no way to write a JSON formatted xcodeproj from XCode API. Maybe using an external project such as XcodeEditor would help on this matter?