extensions/git/src/git.ts/findGitWin32
function findGitWin32(onLookup: (path: string) => void): Promise<IGit> {
	return findSystemGitWin32(process.env['ProgramW6432'] as string, onLookup)
		.then(undefined, () => findSystemGitWin32(process.env['ProgramFiles(x86)'] as string, onLookup))
		.then(undefined, () => findSystemGitWin32(process.env['ProgramFiles'] as string, onLookup))
		.then(undefined, () => findSystemGitWin32(path.join(process.env['LocalAppData'] as string, 'Programs'), onLookup))
		.then(undefined, () => findGitWin32InPath(onLookup));
}