Modify submit-type for Gerrit project via meta/config

The Submit-type of a gerrit code review project can not be changed in the UI after creation. It can be modified via the hidden meta/config branch. Any setting available to create-project can be edited this way.

Project information is not stored in the gerrit database. The information is stored directly in the git repository in a branch named 'meta/config', in two files 'project.config' and 'groups'. The values from these files are cached in the'project-list' and 'projects' caches.

Steps to make a change:

1. set read and push permissions on refs/meta/config
2. check out the branch,
3. change the files,
4. push the repo back,
5. clear the cache.

Check out the branch:

% git fetch origin refs/meta/config:refs/remotes/origin/meta/config
% git checkout meta/config

Push back the changes:

#directly:
% git push origin meta/config:meta/config
#via review:
% git push origin meta/config:refs/for/meta/config

Flush the caches:

% ssh gerrit gerrit flush-caches --cache project_list
% ssh gerrit gerrit flush-caches --cache projects

project.config

[access "refs/*"]
        owner = group MYgroup
[receive]
        requireChangeId = true
[submit]
        mergeContent = true
        action = merge always

groups

# UUID                                          Group Name
# eca2c52d733e5740a01747e71f018dcfdeadbeef      MYgroup

I found the meta/config mentioned in some posts (post post) in the repo-discuss newsgroup.