I have project A. The project A is in perforce as well as in github( Business decision). They are both out of sync. I see that I can use git-p4 tool http://git-scm.com/docs/git-p4 to submit git changes to perforce. Problem is first instruction of it says is:
git p4 clone //depot/path/project
This command will create a new repo in git hub. I do not want that. I want my existing perforce depot to connect to exiting github repo and then sync files from github to perforce. Is it possible?
No. git p4 is basically just a wrapper around Perforce. It reads changes to a Git repo and issues the proper Perforce commands to commit them (and vice-versa -- it reads changes to a Perforce checkout and issues the proper Git commands to update a Git repo accordingly). So you need to have a Perforce checkout and a local Git repo that can talk to that Perforce checkout.
Fundamentally you have two different histories for the same project, so you need to find some way to reconcile them.
git-p4 can sync from Perforce (create a new git repository), then you can add a new remote pointing to github, and sync the branches from there.
However that doesn't help with the problem of merging the histories.
You can either:
2 is probably (politically) impossible. May be impossible technically. Perforce is designed to prevent history from being altered.
1 will break anyone cloned from your github repository.
You may want to take a look at Git Fusion, which is a bridge between Git and Perforce:
http://www.perforce.com/git-fusion
This KB article gives an example of how you may wish to work with a project that is both in Perforce and a public Git repo:
http://answers.perforce.com/articles/KB/7481/
Hope this helps!
