implement OperatingSystem

[zwetan]

when we updated from redtamarin 0.3.2 to 0.4
OperatingSystem got very summarily implemented
we need to upgrade it

[zwetan]

clarification

see Implementation Of OperatingSystem - Advanced

we want to be able to know everything about the OS

if( OperatingSystem.vendor == "Linux" )
{
    if( OperatingSystem.vendorName == "Ubuntu" )
    {
          var version:String = OperatingSystem.vendorVersion;
          if( version.indexOf( "12.04" ) > 0 ||
              version.indexOf( "14.04" ) > 0 ||
              version.indexOf( "16.04" ) > 0 )
          {
                  trace( "is LTS - Long Term Support" );
          }
    }
}

see the different description and example of name, version, vendor, vendorName, vendorVersion, etc.

[zwetan]

before we implemented uname() as a native function
but for a quick "hack" we will use basic file or command line parsing
to detect the OS version, name, etc.

[zwetan]

for now we re-implemented all that we needed using basic parsing

• command line ver for Windows
• file /System/Library/CoreServices/SystemVersion.plist for Mac OS X
• release file, for ex /etc/lsb-release for Linux Ubuntu

It is good enough for now, because we have the "luxury"
of being able to access Runtime.platform we don't really need uname().

At a later time we will implement uname() to get more details
like the kernel name, kernel release and kernel version.

[zwetan]

also at a later time it would be nice to be able to load a cached version of the OS detection

for example, the first time the detection occurs we could
cache a file in /home/username/.redtamarin/os

os

_macintoshName = "Mac OS X 10.10";
_macintoshVersion = "10.10";
_macintoshProductName = "Mac OS X";
_macintoshProductBuildVersion = "14F27";
_macintoshProductVersion = "10.10.5";
_macintoshProductUserVisibleVersion = "10.10.5";
_macintoshProductDescription = "Apple Mac OS X 10.10.5";
_macintoshLongDescription = "Apple Mac OS X 10.10.5 (Yosemite build 14F27)";
_macintoshCodename = "Yosemite";

so next item a detection need to happen we could simply load the data from cache
to avoid parsing files and other logics and make it faster