Re: LZMA support in flat packages?
Re: LZMA support in flat packages?
- Subject: Re: LZMA support in flat packages?
- From: Pepijn Bruienne <email@hidden>
- Date: Mon, 09 Sep 2013 14:40:23 -0400
Looking with a disassembler at the custom binary Adobe uses to perform their postflight it seems that they compiled LZMA support in, adding further proof that Apple's installer itself will not handle it natively.
Pepijn.
--
Pepijn Bruienne
email@hidden
On Sep 9, 2013, at 2:30 PM, Greg Neagle <email@hidden> wrote:
> FWIW, same behavior on Snow Leopard. Of course it's _possible_ that xar/pkgutil/installer can _decompress_ flat packages compressed using LZMA, but I'm pretty skeptical.
>
> -Greg
>
> On Sep 9, 2013, at 11:26 AM, Greg Neagle <email@hidden> wrote:
>
>> I think Apple's documentation is lying. Yes, `man xar` has mentions of LZMA support, but on my Mountain Lion machine:
>>
>> % xar -caf Flash.pkg foo
>> Error while creating archive:(foo/Bom): lzma support not compiled in. (Undefined error: 0)
>>
>> So the support seems more theoretical than actual.
>>
>> -Greg
>>
>> On Sep 9, 2013, at 11:03 AM, Per Olofsson <email@hidden> wrote:
>>
>>> Say you have an installer package that will be downloaded millions of times and you'd like to make sure that the installer is as small as possible to save on bandwidth costs, would it be possible to have the package payload compressed with LZMA and still be installed correctly on 10.6+? LZMA is supported both by xar, which is responsible for the pkg file format, and by cpio, which compresses the Payload.
>>>
>>> The original discussion is here: http://forums.adobe.com/message/5665793
>>>
>>> --
>>> Per Olofsson
>>> System Administrator, IT-services, University of Gothenburg
>>>
>>>
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