[yocto] how to set up PREMIRRORS_prepend to avoid constant git clones?

[Robert P. J. Day]

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.

  one last point -- what i typically do as a test is always

  $ bitbake -c fetchall <target>

before doing the actual build, just to see that everything is
fetchable and gets fetched.  is there a bitbake task that would tell
me what needs actual fetching before i start that?

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================