I would like to exploit the integration between the two tools to be able to automatically create a branch in GitLab for every new Bug or Feature ticket created in Jira.
I would like to know if (i) it is possible; (ii) what is the link between the two tools (I guess the unique ID number assigned by Jira); (iii) assuming the first point is true, what happens to the created branch when I close the Jira issue (e.g. I've mistakenly created a bug fix that was not needed).
I've used Jira in conjunction with GitHub so I'll try my best to help you.
I) This is definitely possible.
II) We used to use the unique ID given to a ticket and include it within in the branch name this creates a link between both tools. Any changes committed on the branch will be shown in JIRA.
III) From experience when this happens the branch will persist and will need to be deleted manually using a console we used to use a .git console and used a delete command.
I also found through a quick google search some documentation on GitLab on integration with JIRA as well as some insight on creating branches.
Doc - https://docs.gitlab.com/ee/user/project/integrations/jira.html
Branch - https://gitlab.com/gitlab-org/gitlab-ce/issues/3886
Hope this helps.
