(v3) project load spec must specify a diskUrl: or gitUrl: or trouble will ensue

[dalehenrich]

This is a properly specified load spec:

RwLoadSpecificationV2 {
	#projectName : 'RwCAQ',
	#projectSpecFile : 'rowan/project.ston',
	#gitUrl : 'git@github.com:GemTalk/RwCAQ.git',
	#revision : 'rowan.v3',
	#componentNames : [
		'Core'
	],
	#platformProperties : {
		'gemstone' : {
			'allusers' : {
				#defaultSymbolDictName : 'Globals'
			}
		}
	},
	#comment : ''
}

If the gitUrl or diskUrl spec is missing, the project will load just fine (if it is already present on disk), however you will not be able do a diff because the RwNoRepositoryDefinitionV2 will be used and that means the no interaction with the disk based repo is possible ...

Upon reading a loadSpec for a project or for a required project, we must check that a proper source location url has been specifiied.

Note that this is more likely to occur when a project is loaded as a required project that is already in ROWAN_PROJECTS_HOME ... but if it's on disk specification is missing a gitUrl or diskUrl, then when the project is read for comparison things will go bad ...