How to use Jenkins parameters in a shell script

Question

I want to use the parameters that we define in the Jenkins job as arguments to the shell commands in the same job.

I have created a parameterized build with the following parameters:

high.version: 234 low.version: 220 

I want to use these variables as arguments for the build's shell script:

/bin/bash /hai/mycode/scripts/run_script.sh high.version 

How do I these parameters in the same job?

Answer 1

What really helped me was Hudson: How to pass parameters to shell script

Solution: the variables are UPPERCASE even you define them in lowercase!

Answer 2

Jenkins will create environment variables with the parameters' names.

The caveat here is that Jenkins will also do that for parameters that do not represent valid variable names -- those are difficult to access in bash. This is the case in your example, as bash variable names must not contain the . character.

The easiest solution is that you

• rename your parameters, e.g. to high_version and low_version (which are valid bash variable names)
• then use the corresponding variable names when calling your script

Example:

/bin/bash /hai/mycode/scripts/run_script.sh "$high_version" 

If you cannot rename parameters to represent valid bash variable names (e.g., for usability reasons: Jenkins presents variable names to end users in the Web form for starting a build): you can still access such parameters by grepping for the parameter name in the output of the env command.