Re: Openembedded-core Digest, Vol 106, Issue 126

[Joseph Reynolds <jrey@linux.ibm.com>]

On 11/17/19 3:19 PM, openembedded-core-request@lists.openembedded.org wrote:

 >Message: 4 >Date: Sun, 17 Nov 2019 22:19:32 +0100 >From: Alexander 
Kanavin <alex.kanavin@gmail.com> >To: Joseph Reynolds 
<jrey@linux.ibm.com> >Cc: OE-core 
<openembedded-core@lists.openembedded.org> >Subject: Re: [OE-core] How 
to add build date? (was: ... basehash value > changed...) >Message-ID: > 
<CANNYZj8LNhF26TLHuLMPh6K40dXe8V5pgEvv8N3MAEFVy+vveg@mail.gmail.com> 
 >Content-Type: text/plain; charset="utf-8" > >I'd write the date into 
the file at image creation, via >ROOTFS_POSTPROCESS_COMMAND. Got it, 
thanks. I was unaware of ROOTFS_POSTPROCESS_COMMAND. >Having it in a 
recipe means that you either force the recipe to not be a >part of 
sstate cache, always rebuilding it and its dependencies (bad idea), >or 
accept that the date comes from a previously built cache object, which 
 >means it will mismatch the actual image creation date. > >A bit of 
context would help: why would you want that info in os-release? >Who 
would use that information and how? I don't fully understand the use 
case. I think the build date is being used as a substitute for a 
software version. I've re-asked the question to the original poster in 
the OpenBMC email list: 
https://lists.ozlabs.org/pipermail/openbmc/2019-November/019493.html - 
Joseph >Alex >On Sat, 16 Nov 2019 at 23:14, Joseph Reynolds 
<jrey@linux.ibm.com> wrote:

> Is there a best practice for folks who want to put the build date into
> their generated os-release file?  I've seen this question come up at
> least 3 times in my brief involvement with OE.  I could perhaps add
> comment to the OpenBMC os-release.bbappend file to provide the proper
> guidance.  I would like to hear your ideas.
>
> - Joseph
>
>
> -------- Forwarded Message --------
> Subject:        Re: how to solve the error that basehash value changed
> from
> 'xxx' to 'aaaa' ?
> Date:   Sat, 16 Nov 2019 15:50:38 -0600
> From:   Joseph Reynolds<jrey@linux.ibm.com>
> To:     www<ouyangxuan10@163.com>,openbmc@lists.ozlabs.org
> <openbmc@lists.ozlabs.org>
>
>
>
> Byron,
>
> What modification did you put into the os-release recipe?  It would help
> us help you if you put that in your email.
>
>
> Are you adding the build date to the generated os-release file? If so,
> be aware that might cause the issues with the shared state cache you are
> experiencing.  Also be aware this practice wrecks reproducible builds.
>
> A better way to get the same effect might be to create a git tag with
> the information you want to appear in the generated os-release file.
> When you buld with this tag is then picked up by the OpenBMC
> meta-phosphor os-release.bbappend (via `git describe`) and included in
> the genersted os-release file as the BUILD_ID. See:
>
> https://github.com/ibm-openbmc/openbmc/blob/d1c59b7a36c10c18838c07af10b18080174cd61d/meta-phosphor/recipes-core/os-release/os-release.bbappend
> (But I have not tried that.)
>
> A way to work around the hash change is to add a line to your recipe
> like: PR[vardepsxeclude]="DATETIME"
> As suggested by:
> https://forums.openpli.org/topic/41447-how-to-get-rid-of-taskhash-mismatch/
>
>
> My apologies for top posting -- my email reader was not quoting the
> message properly, so I cut/pasted it below.
>
> - Joseph
>
>
> On 11/13/19 1:38 AM, www wrote:
>
> When I modify the os-release file in my yocto project, it appear some
> error, and how can I solve it ? Who can give me some help or advice?
> Thank you?
> I execute the recommended command on the console and it didn't work.