[yocto] how to set up PREMIRRORS_prepend to avoid constant git clones?
Robert P. J. Day
rpjday at crashcourse.ca
Sat Mar 10 05:39:31 PST 2012
On Sat, 10 Mar 2012, Gary Thomas wrote:
> All you really need are these lines:
> SOURCE_MIRROR_URL ?= "file://${COREBASE}/sources/"
> INHERIT += "own-mirrors"
> Adjust the SOURCE_MIRROR_URL to wherever you want the files. I also always
> add
> BB_GENERATE_MIRROR_TARBALLS = "1"
> This will let the fetcher make a git2_XXX tarball, once the repo has been
> cloned.
>
> My understanding is that the git (and other SCM) fetcher works like this:
> * If there is a git2_XXX tar file in the DL_DIR (or mirror), unpack it
> into ${BUILD}/downloads/git2
> * Check to see if the desired ${SRCREV} is present. If not, do a 'git pull'
> to update the local clone and then rebuild the git2_XXX tarball.
> This way, you only have to clone once - just copy any generated tarballs back
> to your source mirror.
>
> Finally, if you set
> BB_NO_NETWORK = "1"
> the build will fail if bitbake *ever* has to go to the network,
well, that (sort of) worked so let me summarize for the benefit of
anyone else interested.
i configured for a new build (beagleboard), and added the following
to the bottom of local.conf:
SOURCE_MIRROR_URL ?= "file:///home/rpjday/dl/"
INHERIT += "own-mirrors"
BB_GENERATE_MIRROR_TARBALLS = "1"
# BB_NO_NETWORK = "1"
(since i know i'll need to do some downloading, i won't ban network
access, obviously, not for this first run.)
did a "bitbake -c fetchall core-image-minimal", then checked my
downloads/ directory for any content that actually got downloaded and
tarball-ed, and found one obvious and sizable download:
... 87770604 2012-03-10 06:45 gcc-4_6-branch_gcc.gnu.org_.svn.gcc.branches_184847_.tar.gz
i copied that over to my own mirror dl/ directory, then configured a
whole new build (also beagleboard), added same mirror directives to
local.conf except (of course) banning network access this time, and
once again did
$ bitbake -c fetchall core-image-minimal
and got something unexpected:
NOTE: package bash-4.2-r1: task do_fetch: Started
ERROR: Function failed: Network access disabled through BB_NO_NETWORK
but access rquested with command /usr/bin/env wget -t 5 -nv
--passive-ftp --no-check-certificate -P
/home/rpjday/yocto/builds/beag2/downloads
'ftp://ftp.gnu.org/gnu/bash/bash-4.2-patches/bash42-001' (for url
None)
ERROR: Logfile of failure stored in:
/home/rpjday/yocto/builds/beag2/tmp/work/armv7a-vfp-neon-poky-linux-gnueabi/bash-4.2-r1/temp/log.do_fetch.32479
Log data follows:
| DEBUG: Trying PREMIRRORS
... snip ...
i can clearly see the problem -- while i have the bash tarball
itself in my own mirror, i don't have the patches to go with it, as
defined in the recipes file:
SRC_URI = "${GNU_MIRROR}/bash/${BPN}-${PV}.tar.gz;name=tarball \
${GNU_MIRROR}/bash/bash-4.2-patches/bash42-001;apply=yes;striplevel=0;name=patch001 \
${GNU_MIRROR}/bash/bash-4.2-patches/bash42-002;apply=yes;striplevel=0;name=patch002 \
${GNU_MIRROR}/bash/bash-4.2-patches/bash42-003;apply=yes;striplevel=0;name=patch003 \
... etc etc ...
when i went looking for actual downloads in step 1, i just searched
for sizable tarballs or zip files, it never occurred to me to check
for patch files. so i guess i just have to be more observant and
check for patch files as well (or anything else a recipe might want to
download).
so far, so good?
rday
--
========================================================================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
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