[yocto] Question about BB_NO_NETWORK

Gary Thomas gary at mlbassoc.com
Sat Mar 28 04:47:06 PDT 2015 

On 2015-03-27 12:24, Gary Thomas wrote:
> On 2015-03-27 11:19, Richard Purdie wrote:
>> On Fri, 2015-03-27 at 11:09 -0600, Gary Thomas wrote:
>>> On 2015-03-27 11:00, Gary Thomas wrote:
>>>> Can someone explain to me why this recipe (from meta-fsl-arm-extra)
>>>> requires network access if I have a current (built today on a different
>>>> machine) git tarball of the repository?
>>>
>>> Oops, forgot the recipe:
>>>
>>>>
>>>> The error I get is:
>>>>
>>>>      ERROR: Function failed: Network access disabled through BB_NO_NETWORK (or set indirectly due to use of BB_FETCH_PREMIRRORONLY) but access requested with command git -c
>>>> core.fsyncobjectfiles=0 fetch -f --prune git://github.com/boundarydevices/u-boot-imx6.git refs/*:refs/* (for url
>>>> git://github.com/boundarydevices/u-boot-imx6.git;branch=v2014.07-20140914)
>>>>      ERROR: Logfile of failure stored in:
>>>> /local/imx6_2015-03-27/tmp/work/nitrogen6x-amltd-linux-gnueabi/u-boot-script-boundary/v2014.07+gitAUTOINC+fcb04d6103-r0/temp/log.do_fetch.22945
>>>>      Log data follows:
>>>>      | DEBUG: Executing python function do_fetch
>>>>      | DEBUG: Executing python function base_do_fetch
>>>>      | DEBUG: Trying Upstream
>>>>      | DEBUG: Running export
>>>> PATH="/local/poky-cutting-edge/scripts:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/usr/bin/arm-amltd-linux-gnueabi:/local/imx6_2015-03-27/tmp/sysroots/nitrogen6x/usr/bin/crossscripts:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/usr/sbin:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/usr/bin:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/sbin:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/bin:/local/poky-cutting-edge/scripts:/local/poky-cutting-edge/bitbake/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games";
>>>>
>>>> export HOME="/home/gthomas"; git -c core.fsyncobjectfiles=0 branch --contains fcb04d6103e2a1f62d3ae197432559aee5621765 --list v2014.07-20140914 2> /dev/null | wc -l
>>>>      | DEBUG: Running export
>>>> PATH="/local/poky-cutting-edge/scripts:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/usr/bin/arm-amltd-linux-gnueabi:/local/imx6_2015-03-27/tmp/sysroots/nitrogen6x/usr/bin/crossscripts:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/usr/sbin:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/usr/bin:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/sbin:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/bin:/local/poky-cutting-edge/scripts:/local/poky-cutting-edge/bitbake/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games";
>>>>
>>>> export HOME="/home/gthomas"; git -c core.fsyncobjectfiles=0 remote rm origin
>>>>      | DEBUG: Running export
>>>> PATH="/local/poky-cutting-edge/scripts:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/usr/bin/arm-amltd-linux-gnueabi:/local/imx6_2015-03-27/tmp/sysroots/nitrogen6x/usr/bin/crossscripts:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/usr/sbin:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/usr/bin:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/sbin:/local/imx6_2015-03-27/tmp/sysroots/i686-linux/bin:/local/poky-cutting-edge/scripts:/local/poky-cutting-edge/bitbake/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games";
>>>>
>>>> export HOME="/home/gthomas"; git -c core.fsyncobjectfiles=0 remote add --mirror=fetch origin git://github.com/boundarydevices/u-boot-imx6.git
>>>>      | DEBUG: Python function base_do_fetch finished
>>>>      | DEBUG: Python function do_fetch finished
>>>>      | ERROR: Function failed: Network access disabled through BB_NO_NETWORK (or set indirectly due to use of BB_FETCH_PREMIRRORONLY) but access requested with command git -c
>>>> core.fsyncobjectfiles=0 fetch -f --prune git://github.com/boundarydevices/u-boot-imx6.git refs/*:refs/* (for url
>>>> git://github.com/boundarydevices/u-boot-imx6.git;branch=v2014.07-20140914)
>>>>      ERROR: Task 111 (/local/poky-cutting-edge/meta-fsl-arm-extra/recipes-bsp/u-boot/u-boot-script-boundary_git.bb, do_fetch) failed with exit code '1'
>>>>
>>>> The git tarball and full log are at http://www.mlbassoc.com/poky
>>>>
>>>> Is this a BUG?  I'm using these layers:
>>>>     meta              = "master:5c76cebc24675edb3dff473fce9b67cedff615db"
>>>>     meta-fsl-arm      = "master:115aaced72fddc23024f8838f0eeb8ad5e37d048"
>>>>     meta-fsl-arm-extra = "master:22f6672c3ef58bf5070d0c6894a459fada66f55e"
>>>>
>>
>> Is the specified revision on the specified branch in the tarball?
>
> Absolutely (otherwise, I wouldn't be asking).  Here's the result
> of the first query mentioned above:
>
> $ git -c core.fsyncobjectfiles=0 branch --contains fcb04d6103e2a1f62d3ae197432559aee5621765 --list v2014.07-20140914
>    v2014.07-20140914
>

After trying this scenario on seven different hosts, some failed
while others worked as expected.  I have now determined that the
problem occurred because of stale data that I didn't think to clean
up.  Here's how it went (in chronological order):

* Machine A [2014-12-03]
   Successfully built, from scratch, for the given target, BB_NO_NETWORK unset
   This downloaded git://github.com/boundarydevices/u-boot-imx6.git
   into BUILD/downloads/git2/github.boundarydevices.u-boot-imx6.git
   and saved the result tarball, which I then moved to my shared mirror

* meta-fsl-arm-extra [2015-03-19]
   Update recipes-bsp/u-boot/u-boot-script-boundary_git.bb

* Machine B [2015-03-27]
   Tried to build for the same target, BB_NO_NETWORK="1"
   Fetch failed (as documented above)

* Machine A [2015-03-27]
   Rebuilt for the target, BB_NO_NETWORK is unset.
   The git tree is updated (since network is OK) and tarball rebuilt
   Move tarball to shared mirror

* Machine B [2015-03-27]
   Retry build BB_NO_NETWORK="1" - fails?
   Report error (this email thread) to list

The problem was that on Machine B, the git tree had already been
unpacked into BUILD/downloads/git2/github.boundarydevices.u-boot-imx6.git
with the data from 2014-12-03.  As long as that existed, it was never going
to check for a new tarball from the mirror.

* Machine B [2015-03-28]
   $ rm -fr downloads/git2_github.com.boundarydevices.u-boot-imx6.git.tar.gz*
   $ rm -fr downloads/git2/github.com.boundarydevices.u-boot-imx6.git*
   Built successfully, BB_NO_NETWORK="1"

Sorry for the lengthy explanation, but I thought it worth it
to document the confusing situation I encountered.  I'm sure
this could bite my customers who routinely use BB_NO_NETWORK="1"
if I ship them a new recipe + tarball (for any odd recipe, not just
this one).

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

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