How to set Jenkins environment variable from script

Question

I\'m trying to setup a script to increment the build number of my Xcode project. I make an API call to get the current build number, then I wanted to increment it and apply

Answer 1

Add a build step to execute shell - in there determine APP_BUILD_NUMBER and output to file, e.g.

APP_BUILD_NUMBER=$(curl --request GET 'https://api.domain.com/api/GetBuildNumber')
APP_BUILD_NUMBER=$((APP_BUILD_NUMBER +1))
echo APP_BUILD_NUMBER=$APP_BUILD_NUMBER > build.properties

then add build step Inject environment variables and set there Properties File Path to $WORKSPACE/build.properties

after that $APP_BUILD_NUMBER is accessible in all build steps after as environment variable; e.g. in Xcode build step

Answer 2

These are also worth considering

• https://wiki.jenkins-ci.org/display/JENKINS/Environment+Script+Plugin.
• https://wiki.jenkins-ci.org/display/JENKINS/EnvInject+Plugin