RFR: 49: Add forwarder bot

[Robin Westberg via github.com]

On Wed, 7 Aug 2019 11:59:56 GMT, Erik Duveblad via github.com <duke at openjdk.java.net> wrote:

> Hi all,
> 
> this patch adds a "forwarder" bot that can forward commits between repositories and or branches. This is useful for e.g. a sandbox use-case where we want to forwards commits from jdk:master to e.g. sandbox:master.
> 
> # Testing
> - [x] Run `sh gradlew test` on Linux x86-64
> - [x] Added two new unit tests for the bot
> 
> I also did some manual testing of the bots to ensure it successfully forwarded commits between two remote repositories.
> 
> ----------------
> 
> Commits:
>  - 04f1d351:	49: Add forwarder bot
> 
> Pull request:
> https://git.openjdk.java.net/skara/pull/40
> 
> Webrev:
> https://webrevs.openjdk.java.net/skara/40/webrev.00
> 
> Patch:
> https://git.openjdk.java.net/skara/pull/40.diff
> 
> Fetch command:
> git fetch https://git.openjdk.java.net/skara pull/40/head:pull/40

bots/forward/src/main/java/org/openjdk/skara/bots/forward/ForwardBot.java line 69:

> 68:                 URLEncoder.encode(toHostedRepo.getUrl().toString(), StandardCharsets.UTF_8);
> 69:             var toDir = scratchPath.resolve("forward").resolve(sanitizedUrl);
> 70:             Repository toLocalRepo = null;

Perhaps it would be better to use permanent storage here (like the hgbridge) to avoid excessive copies when running concurrently.

PR: https://git.openjdk.java.net/skara/pull/40