[yocto] A simpler way of creating an using a local kernel repository - BeagleBone example

[Gary Thomas]

On 2014-05-06 20:48, Bob Feretich wrote:
>
> On 5/6/2014 3:45 PM, Gary Thomas wrote:
>> On 2014-05-06 16:31, Bob Feretich wrote:
>>> I have had problems getting good download performance when accessing the kernels at kernel.org. Since I expect to build the kernel several times, I decided to create a copy of the
>>> kernel repository locally and use that for my builds.
>>>
>>> There are instructions on how to create a local repository in the Yocto manuals, but those are more complex than I needed. (I don't plan on checking anything into the repository.)
>>>
>>> The below is a simpler way of creating and using the repository.
>>> I'm publishing this because my search though the Yocto/OE/Angstrom yielded only the more complicated or incomplete methods.
>>>
>>> // First set up local kernel repository
>>> mkdir ~/ksrc3-8
>>> cd ~/ksrc3-8
>>> git clone --bare git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git stable-work-bare.git
>>>
>>> // Then modify the kernel recipe to use the local repository instead of the the one at kernel.org.
>>> // The beaglebone recipe for the 3.8 kernel is at...
>>> setup-scripts/sources/meta-beagleboard/common-bsp/recipes-kernel/linux/linux-mainline_3.8.bb
>>>
>>> // Replace the file's SRC_URI with one that points to your local repository.
>>> #SRC_URI = "git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git;branch=linux-3.8.y"
>>> SRC_URI = "git:///home/Bob/ksrc3-8/stable-work-bare.git;branch=linux-3.8.y"
>>
>> IMO a much simpler (and certainly less invasive) way is to just
>> use your own local source mirrors.  Add these lines to your local.conf:
>>   SOURCE_MIRROR_URL = "file:///some-mirror-directory/"
>>   INHERIT += "own-mirrors "
>>   BB_GENERATE_MIRROR_TARBALLS ?= "1"
>>
>> Once the git repository has been downloaded, it will be packed up in a
>> tarball, e.g.
>> git2_git.kernel.org.pub.scm.linux.kernel.git.stable.linux-stable.git.tar.gz
>> If you then put this file into your SOURCE_MIRROR, the next time bitbake will
>> fetch from there [first].  It's even smart enough that if you need a revision
>> which is not in the tarball, it will update the git repository and rebuild the
>> tarball, which you can then move to your mirror.
> Better!
> Questions:
> Is     INHERIT += "own-mirrors "
> coded as you state it, or am I supposed to substitute something for "own-mirrors " ?

This line is used as written.

>
> Where does      BB_GENERATE_MIRROR_TARBALLS ?= "1"
> put the tarball?

In your downloads directory.

>
> Does do_rm_work remove them?

No (since that only touches files in tmp/work/...)

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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