Re: [PATCH] build: honor autogen.sh --no-git

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On Mon, Jul 08, 2013 at 07:44:18AM -0600, Eric Blake wrote:
> On 07/04/2013 03:32 AM, Daniel P. Berrange wrote:
> > On Wed, Jul 03, 2013 at 03:07:51PM -0600, Eric Blake wrote:
> >> Based on a report by Chandrashekar Shastri, at
> >> https://bugzilla.redhat.com/show_bug.cgi?id=979360
> >>
> >> On systems where git cannot access the outside world, a developer
> >> can instead arrange to get a copy of gnulib at the right commit
> >> via side channels (such as NFS share drives), set GNULIB_SRCDIR,
> >> then use ./autogen.sh --no-git.  In this setup, we will now
> >> avoid direct use of git.  Of course, this means no automatic
> >> gnulib updates when libvirt.git updates its submodule, but it
> >> is expected that any developer in such a situation is already
> >> prepared to deal with the fallout.
> > 
> > Could you also expand
> > 
> >   http://libvirt.org/compiling.html#building
> > 
> > to describe how to build from GIT, but without needing direct
> > net access. It has come up periodically & we don't have any
> > docs about this aspect afaik.
> > 
> > ACK to changes
> 
> How does this work as a followup patch?  (Actually, I may just squash it
> in with the gnulib patch and do it all at once...)
> 
> Hmm, this would be the first time the auto-generated HACKING file refers
> to an in-tree html file (rather than an external project page), and I'm
> not sure I like how the formatting turned out.  Any suggestions on how
> to make that look better?
> 
> diff --git i/HACKING w/HACKING
> index a310faa..37e102c 100644
> --- i/HACKING
> +++ w/HACKING
> @@ -36,7 +36,10 @@ developer is:
>    git checkout -t origin -b workbranch
>    Hack, committing any changes along the way
> 
> -Then, when you want to post your patches:
> +More hints on compiling can be found
> +
> +  here
> +  compiling.html. When you want to post your patches:
> 
>    git pull --rebase
>    (fix any conflicts)
> diff --git i/docs/compiling.html.in w/docs/compiling.html.in
> index 66d2925..215fdf1 100644
> --- i/docs/compiling.html.in
> +++ w/docs/compiling.html.in
> @@ -65,8 +65,36 @@
>        checkout it is necessary to generate the configure script and
> Makefile.in
>        templates using the <code>autogen.sh</code> command. By default when
>        the <code>configure</code> script is run from within a GIT
> checkout, it
> -      will turn on -Werror for builds. This can be disabled with
> --disable-werror,
> -      but this is not recommended. To build &amp; install libvirt to
> your home
> +      will turn on -Werror for builds. This can be disabled with
> +      --disable-werror, but this is not recommended.
> +    </p>
> +    <p>
> +      Libvirt takes advantage of
> +      the <a href="http://www.gnu.org/software/gnulib/";>gnulib</a>
> +      project to provide portability to a number of platforms.  This
> +      is normally done dynamically via a git submodule in
> +      the <code>.gnulib</code> subdirectory, which is auto-updated as
> +      needed when you do incremental builds.  Setting the environment
> +      variable <code>GNULIB_SRCDIR</code> to a local directory
> +      containing a git checkout of gnulib will let you reduce local
> +      disk space requirements and network download time, regardless of
> +      which actual commit you have in that reference directory.
> +    </p>
> +    <p>
> +      However, if you are developing on a platform where git is not
> +      available, or are behind a firewall that does not allow for git
> +      to easily obtain the gnulib submodule, it is possible to instead
> +      use a static mode of operation where you are then responsible
> +      for updating the git submodule yourself.  In this mode, you must
> +      track the exact gnulib commit needed by libvirt (usually not the
> +      latest gnulib.git) via alternative means, such as a shared NFS
> +      drive or manual download, and run this any time libvirt.git
> +      updates the commit stored in the .gnulib submodule:</p>
> +    <pre>
> +      $ GNULIB_SRCDIR=/path/to/gnulib ./autogen.sh --no-git
> +    </pre>
> +
> +    <p>To build &amp; install libvirt to your home
>        directory the following commands can be run:
>      </p>
> 
> diff --git i/docs/hacking.html.in w/docs/hacking.html.in
> index 904b846..78d4df6 100644
> --- i/docs/hacking.html.in
> +++ w/docs/hacking.html.in
> @@ -35,7 +35,9 @@
>    git checkout -t origin -b workbranch
>    Hack, committing any changes along the way
>  </pre>
> -        <p>Then, when you want to post your patches:</p>
> +        <p>More hints on compiling can be
> +        found <a href="compiling.html">here</a>.  When you want to
> +        post your patches:</p>
>  <pre>
>    git pull --rebase
>    (fix any conflicts)

ACK


Daniel
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