[tycho-user] Proposal for improving speed of tycho-p2-repository-plugin'

[Sandra Parsick <sparsick@xxxxxx>]

Hi Mailing list,

in our project we want to create local p2 mirrors to speed up our local
Maven Tycho build. The idea is that firstly, the devs creates local p2
mirros on their dev machine. Then, target platform is referred to local
p2 mirrors and both ,Eclipse and Maven Tycho Build are using the local
p2 mirrors instead of the remote ones.

I try out the tycho-p2-repository-plugin with the goal mirror. It works,
but it needs too much time to create a local p2 mirror. The second point
is that our self-hosted P2 Repostories are ZIP files in an Artifactory
Repository Manager (btw Nexus hosts P2 repositories also as ZIP files),
so the idea is why not to download the zip instead of the each file by
file that are inside of the zip file. So the proposal to improve the
speed of the mirror goal is the following one:

When the plugin recognizes that the P2 repository is hosted as a zip
file, then plugin download the whole zip file and unpack it on the local
machine in a specific folder. If it has to download more then one P2
repository then it creates a composite P2 repository with the following
layout:

local-p2-mirror // (sample-name)
    ├── repo 1
    ├── repo 2
    ├── compositeArtifacts.xml
    ├── compositeContent.xml
    └── p2.index

What do you think about this idea?

Best regards,

Sandra

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