Any news? I'm willing to help out where needed...
On 18 Apr 2013, at 20:29, Christian Gruber wrote:
> What Sam said… and…
>
> we have to map a project's internal directory structure but also repository
> kind and the directory structure around projects.
>
> Imagine you have an SVN repo and a git repo. The svn repo had, say, this
> structure and a build system that had build files close to the code:
>
> ${repo_root}/projects/project{1,2,3}/sources/some/package/build_file
> ${repo_root}/projects/project{1,2,3}/sources/some/package/MyCode.java
> but you were open-sourcing project1 in its own git repo at
>
> ${new_repo_root}/build.xml
> ${new_repo_root}/some/package/MyCode.java
> You can't just replay commits. You have to replay commits while
> simultaneously mapping directories around the projects, as well as within the
> project. You also have to scrub in both directions so the tool doesn't suck
> in changes to build.xml about which you may or may not internally care, while
> similarly ignoring build_file in the other direction. You may also want to
> scrub out internal-only code, etc.
>
> (Guava also strips out anything with @GwtIncompatible when we generate our
> GWT-compatible sources so we can maintain fewer sources in duplicate form,
> though that's not an issue we tackle in Guice)
>
> (A version of) the syncing system we use is here
> (https://code.google.com/p/moe-java/) though it is maintained by volunteers
> only. The format has idiosyncrasies and all the experts were very busy
> remaking the universe in their day jobs.
>
> It really is kind of awesome black magic. Dan Bentley and Yash Parghi are
> wizards. But for a company to sync two source code bases that are disparate
> in structure, it's a life-saver (well, ok… a day-job time-saver).
>
> cheers,
> Christian.
>
> On 17 Apr 2013, at 4:59, Sam Berlin wrote:
>
> It's mostly just the directory structures are pretty different. MOE makes
> it all magically happen, so we've been banking on using the newer version
> of that... It just took a while to figure out the right incantation to make
> it happy. Now that Christian's figured it out, things should be smooth
> again.
>
> sam
> On Apr 17, 2013 7:24 AM, "Tim Boudreau" [email protected] wrote:
>
> On Wed, Apr 17, 2013 at 1:05 AM, Christian Gruber [email protected]:
>
> I'm now unblocked on where I was blocked earlier trying to get our
> syncing tool to work between the internal google repository and the code
> site repository.
>
> Having set up and also rebuilt from the ground up a lot of build systems
> over recent years, you've got me curious - what are you guys doing
> internally that makes this hard? I know large organizations have their
> processes and codebases have their history (I worked for Sun, after all!).
> But I've got to say, if it takes months to build a diff and apply it, the
> reason why must be pretty interesting.
>
> -Tim
>
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> Christian Gruber :: Google, Inc. :: Java Core Libraries :: Dependency
> Injection
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>
>
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