On Mar 15, 2013, at 7:29 PM, Hin-Tak Leung wrote:

> The decision to actively discourage non-subsersion usage of snapshot build is 
> already made (r62183). So I am just here to register a differing opinion.
> 
> - it is not about subversion vs other-version-control-tools. There are two 
> parts of R's dev build process which requires an active network connection - 
> tools/rsync-recommended and capturing `svn info` into R's headers.

That is a false statement - svn info doesn't require any network connection.

Cheers,
Simon



> The former can be overridden with "./configure 
> --with-recommended-packages=no". A few changes had been made in the last 6 
> months to make the latter mandatory. It used to be optional.
> 
> --- there are genuine needs for testing snapshots in a non-networked 
> minimalist environment - e.g. banks or telecom industries - where one wants a 
> "standardised host" build, and often it means an "outdated host"; or in a 
> virtual machine environment - which are non-networked for security reasons, 
> and also do not have tools beyond necessary for compiling and building. This 
> is quite a common scenario.
> 
> --- AFAIK, 6 months ago, a snapshot copied to an non-networked host will 
> build with "./configure --with-recommended-packages=no". Of course copying 
> those recommended package tar balls across would be nicer. This is sadly no 
> longer the case.
> 
> - dependent on `svn info` and sitting on top of a svn checkout possibly also 
> affects cross-compiling. But then, it is not clear whether it is still 
> possible to cross-compile R, since quite a few changes have been made to 
> remove the capability of cross-compiling R for windows on unix hosts in the 
> last few years. 
> 
> - testing dev snapshots is about trying things and fixing bugs before 
> release. Making it difficult for non-core people to "try", seem to go against 
> that ethos. If that's the case, maybe the repository could be closed off to 
> anonymous check outs altogether, just to make it clear that testing snapshots 
> before releases or even close to release, is not welcomed. Just a thought.
> 
> - although the official repository of the "main" linux kernel branch is 
> git-based, there are mercurial mirrors; AFAIK the digital video broadcasting 
> hardware support of the linux kernel is officially in mercurial repositories, 
> but have git mirrors; likewise much of Xorg's is in mercurial but have git 
> mirrors. I haven't heard of any much bigger public projects than R where some 
> actively discourage others.
> 
> - To be honest r62183 itself is probably a good reason to move away from 
> server-side repositories to distributed repositories (hg/git/arch/bzr). Local 
> enhancements - i.e. an in-house fork - some of which are never going 
> upstream, such as a local revert of r62183 (or a local revert of any other 
> upstream commits) is one reason why some have distributed repositories.
> 
> Lastly, a minor grip. The current head of the HK government is probably 
> sometimes called "HK Leung", just as some might call a certain old lady "UK 
> Windsor" and a certain black person "US Obama".
> 
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> 
> 

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