How to pass environment variable of hudson as a parameter for svn build

Question

My requirement is I need the scope of Hudson's environment variable in the subproject's build parameter for svn url.

I want to set SVN Branch name as an environment variable of Hudson, as I want it to be used by all my projects configured there.

If I access my environment variable [BUILD_BRANCH] as

http://svn/repos/project/subproj/branches/${BUILD_BRANCH}

the url is not getting replaced with the value.

But in the same case if I have BUILD_BRANCH as String Parameter for Parameterised Build in each subproj the url is replaced with value. But I cannot not change the branch value [build parameter value] each time in all the projects. Also the downstream projects were not able to access the build parameters [String] of the calling projects.

Answer 1

set BUILD_BRANCH in ManageHudson->Configure System->Global properties->Environment Variables