Re: [Ltib] Adding building of kernel from SVN

[Stuart Hughes]

Hi Peter,

I can certainly see why this could be convenient for you, however
unfortunately I can't merge this.  I went down this patch a couple of
years ago with git and in the end you end up with these issues:

  * LTIB has to understand the SCP and becomes a front end for the tool
  * The floodgate open for SCM system x, y,x (mecurial, cvs, git ......)

After a lot of thought I concluded that the best approach was for LTIB
to be ignorant and agnostic of the underlying SCM being used for
development.  The idea is that for this activity you should use
directory build mechanism and handle any SCM work in the .spec file you
are using.  This turns out to work quite well, you can put all the SCM
handling in the %prep (checkout) and %build (update) sections (I have
some examples for git somewhere.

Regards, Stuart

On 28/01/11 16:32, Peter Barada wrote:
> Stuart,
> My company uses SVN as its SCM, and I've added support to build a kernel 
> using SVN instead of the tarball/patches to make it much easier for more than 
> one developer to hack up kernel code.
> 
> To support this (and make it properly work with Buildbot) I've modified the 
> ltib script to:
> 
> 1) Ignore .svn files
> 2) If the package version is "svn" then we force a build (but not a $dir_bld) 
> to have ltib go throught he package %prep step
> 3) Export KERNEL_RESPOITORY (the SVN URL to access the kernel source)
> 4) Export KERNEL_SCM_SKIP_UPDATE (to allow skipping "svn update" for a 
> previously unpacked package)
> 
> Note that ltib-svn-kernel-build.patch works in conjunction with my previous 
> ltib-clobber.patch as it uses $svn_bld to set $r (which causes a build) 
> instead of $dir_bld which prevents --clobber from affecting the unpacked 
> source.
> 
> I've also attached:
> 1) kernel26-svn-build.spec.in which will checkout/update kernel source (in 
> rpm/BUILD/kernel-svn) from an SVN repository.
> 2) kernel_dir_build.lkc.patch which adds 
> KERNEL_REPOSITORY/KERNEL_SCM_SKIP_UPDATE if KERNEL_SVN_BUILD is enabled 
> (assumed this is done in a platform main.lkc where once can select 
> KERNEL_DIR_BUILD)
> 3) kernel-common.tmpl.patch to use tar to copy over the kernel header files 
> (as cp fails with "permission denied" on .svn files in the headers)
> 
> I'm sure with a minor additions this approach can be extended to support CVS 
> and git to allow kernel building from any of the common SCMs.  Ultimately it 
> would be nice to extend this to support building any package from an SCM...
> 
> Hope others finds this useful!
> 
> 
> 
> 
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