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Date:      Mon, 13 Nov 2017 07:36:15 +1300
From:      Jonathan Chen <jonc@chen.org.nz>
To:        Grzegorz Junka <list1@gjunka.com>
Cc:        freebsd-ports@freebsd.org
Subject:   Re: Firefox (Doesn't) Build
Message-ID:  <CAJuc1zMBZNW8NT-KxRr0=SyeckTzL9gGXx97U0zdGo9xMxyyKA@mail.gmail.com>
In-Reply-To: <CAJuc1zNqseCoKEq=%2BgRcO%2BRgvp3jVAq5LXu-2=-woTtOgJiM0Q@mail.gmail.com>
References:  <BL2PR05MB2274B42AD1B2CFE4B5215767BB550@BL2PR05MB2274.namprd05.prod.outlook.com> <BL2PR05MB22748A248A96B4ECBE5E40EBBB550@BL2PR05MB2274.namprd05.prod.outlook.com> <CAJuc1zM1JqzYYUOHTP=VpAqi6Rz%2BEvGAW6OyODsg9W_mjH6xMg@mail.gmail.com> <a3c414cc-2cf6-2dec-c467-c2ed0aa5c1e6@gjunka.com> <CAJuc1zNqseCoKEq=%2BgRcO%2BRgvp3jVAq5LXu-2=-woTtOgJiM0Q@mail.gmail.com>

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On 13 November 2017 at 07:33, Jonathan Chen <jonc@chen.org.nz> wrote:
> On 13 November 2017 at 00:03, Grzegorz Junka <list1@gjunka.com> wrote:
>> On 12/11/2017 07:14, Jonathan Chen wrote:
>>>
>>> On 12 November 2017 at 12:16, Patrick Dorion <dorionpatrick@outlook.com>
>>> wrote:
>>>>
>>>> What's the difference between using Poudriere or Synth, though?
>>>>
>>>> This is a clean system, I can't imagine a jail being cleaner... it was
>>>> unpacked from the DVD the day before yesterday....
>>>
>>> Both are clean room builds; ie where only minimal build dependancies
>>> are installed for each port build. The main difference is that:
>>>   * poudriere uses jails to achieve this
>>>   * synth uses unionfs+chroot to achieve this
>>
>>
>> Does it mean synth can't be used on ZFS? AFAIK unionfs isn't properly
>> supported on ZFS, i.e. a file that exists in the underlying fs can't be
>> marked as deleted in the overlying fs.
>
> synth uses unionfs for read-only access to the build-host's files; eg:
> ports-dir, system binaries. In normal operation, all build artifacts
> are generated onto on an isolated tmpfs filesystem. There are no
> additions/removals on the build-host's filesystem.

Sorry, this is not true. The build logs and generated packages *do*
affect the build-host's filesystem; but the build operations do not.

Cheers.
-- 
Jonathan Chen <jonc@chen.org.nz>



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