在Jenkinsfile中的环境变量中使用git分支

Question

I would like to customize one of environment variable depending on branch that is being build.

environment {
        CUSTOM_ENV='xyz_${GIT_BRANCH}'
    }

I'd like to get CUSTOM_ENV=xyz_dev for origin/dev and CUSTOM_ENV=xyz_master for origin/master . Not sure if its important, but its multibranch project in Jenkins.

I tried things like xyz_${GIT_BRANCH} or xyz_env.GIT_BRANCH , but none of this worked out.

Answer 1

If your shell happens to be compatible with ksh or bash then you can use the variable-expansion modifier ## to discard everything up to and including the final / character, leaving get just the part of ${GIT_BRANCH} that comes after that / . That would look like:

CUSTOM_ENV="xyz_${GIT_BRANCH##*/}"

Note the double-quotes " rather than the single-quotes ' you used in your question. Single-quotes prevent the evaluation of variables inside the quoted string, and that's definitely not what you want in this case.

If your shell does not understand the ## modifier then you'll have to use something like sed to get just the last part of ${GIT_BRANCH} . That would look like this:

CUSTOM_ENV="xyz_$(echo ${GIT_BRANCH} | sed -e 's@.*/@@')"

Answer 2

When you are doing a substitution in jenkinsfile for a variable. It should always be in "" . From environment directive , I guess you are using pipelines. So, you can leverage the groovy syntax to achieve string manipulation. Something like,

environment {
        GIT_BRANCH = 'orgin/master'.split('/')[1]
        CUSTOM_ENV="xyz_${GIT_BRANCH}"
    }