I've setup redmine and have working mercurial repositories.
The hg repos are located in /home/hg/repos so I've set hg as owner to be able to push.
Is it possible to make redmine automatically setup repos when "creating" them in the web UI? There's only one person I can trust with su access on our linux machine but several users should be able to create projects and associated repos. It would be ideal to set this up so redmine automatically creates those repos.
Is this possible? Am I clear enough in my question?
Yes. The reposman.rb script is explicitly meant for this purpose.
Usually it is done calling the above script on a cronjob i.e:
However, mercurial does not have an equivelent implementation as the above is for SVN (http://www.redmine.org/boards/1/topics/575). It is possible to write your own hooks to accomplish this. If you don't mind modifying the Redmine core you can use the information here as very minimal source of approach on the issue: http://joshua-enfield.blogspot.com/2010/09/adding-your-own-hooks-into-redmine.html
With above method you could call a shell script containing the commands you would normally use to create a repository. This is fully customizable. (A shell script is just a file with execute permissions containing commands as you would type them on the command line). Basically using that guide for creating a repository you would call a script which created a directory by the name of the project identifier
cd
into that directory and then runhg init
You could then use mysql to add the repository automatically to the project identified by the project identifier.A more elegant solution would be to use the above with native Redmine hooks in a plugin or creating copies of the modified pages in a plugin which would automatically override the Redmine core - http://www.redmine.org/wiki/1/Hooks
If you need to do anything with the database the below is helpful: https://stackoverflow.com/questions/3215902/3284099#3284099
Check out the Repositories page on the Redmine Wiki and scroll down to the Mercurial repositories section to make sure that your setup correctly.
You can then check out the Apache Configuration for Mercurial Repositories on the Redmine Wiki to make sure you have the right setup to gain access control from within Redmine.
Follows the instructions to install Redmine.pm as described and configure your apache like this.