New .gitignore structure overhaul

[bilderbuchi]

Some problems have cropped up since the last gitignore overhaul (#1107), we'll collect them here and I'll submit a PR.

See discussion in #1981.

• ofxSynth and ofxThreadedImageLoader are missing in the official addon list.
• some files are committed but match ignore rules (found with git ls-files -i --exclude-standard)
• the one which could be optimized away would be the one in SerialTest.
• apps/devApps/VboExample/bin/data/.gitignore could be renamed .gitkeep cause it's empty
• see if it makes sense to simplify the gitignore collection in in apps/devApps/AdvancedImageLoading and /libs/openFrameworksCompiled/lib/*/
• are the .elf & .hex files in serialTest necessary?

[bilderbuchi]

So, the list of files which are in the repo erroneously is

$ git ls-files -i --exclude-standard
apps/devApps/projectGenerator/src/pugixmlLib/scripts/pugixml.xcodeproj/project.xcworkspace/contents.xcworkspacedata
apps/devApps/projectGenerator/src/pugixmlLib/scripts/pugixml.xcodeproj/project.xcworkspace/xcuserdata/molmol.xcuserdatad/UserInterfaceState.xcuserstate
apps/devApps/projectGenerator/src/pugixmlLib/scripts/pugixml.xcodeproj/project.xcworkspace/xcuserdata/molmol.xcuserdatad/WorkspaceSettings.xcsettings
apps/devApps/projectGenerator/src/pugixmlLib/scripts/pugixml.xcodeproj/xcuserdata/molmol.xcuserdatad/xcschemes/pugixml.xcscheme
apps/devApps/projectGenerator/src/pugixmlLib/scripts/pugixml.xcodeproj/xcuserdata/molmol.xcuserdatad/xcschemes/xcschememanagement.plist
scripts/ios/template/emptyExample.xcodeproj/project.xcworkspace/contents.xcworkspacedata
scripts/osx/template/emptyExample.xcodeproj/project.xcworkspace/contents.xcworkspacedata

There are a couple of things I need cleared up by XCode users. Calling @ofTheo @ofZach @julapy

1: it's clear that xcuserdata folders/files should be ignored. this is unproblematic as far as I can see. Correct? One exception: this pugixml.xcscheme seems to be a build scheme, but it's user-specific when it should be shared, which would move it into xcshareddata, resolving the problem. Correct? If so, could someone do that and commit it to the repo, so I can remove the xcuserdata folders?

2: *.xcworkspace is currently ignored according to this. Is this still correct? there seems to be disagreement in the SO community if thsi should be ignored or not: here, here, here. Do you know if I can safely remove those from the repo?

[kylemcdonald]

1. i think xcuserdata can be ignored competely, and i always ignore it in my .gitignore files. but i'm not positive about this, it would be good to have someone else chime in. i think sometimes my project files require users to select a certain build scheme, but i'm not sure.
2. i looked through those SO responses, and my feeling is that if we are getting by ok without it, then it's fine to keep excluding it.

[ofTheo]

thanks!!

the only files we need to have for xcode are:

emptyExample.xcodeproj/project.pbxproj
emptyExample.xcodeproj/xcshareddata/xcschemes/emptyExample Debug.xcscheme
emptyExample.xcodeproj/xcshareddata/xcschemes/emptyExample Release.xcscheme

all other files inside of an xcodeproj folder can be removed

[bilderbuchi]

awesome guys. I'll add this to the PR.