Hi -
I have an issue with variables being restored in a pipeline job after a
Jenkins restart.
Say I have a pipeline like this:
// Local var set to 'env'
def localEnv = env
// Simple local var
def foo = "Bar"
pipeline {
agent any
environment {
// You can do it here but I really want the whole env in my own var
myBuildNumber = "${env.BUILD_NUMBER}"
}
stages {
stage('Init') {
steps {
echo "${localEnv.BUILD_NUMBER}"
}
}
stage('Hello') {
steps {
echo "hello"
input 'Waiting for input...'
// Lets see what we have
echo "localEnv.BUILD_NUMBER = ${localEnv.BUILD_NUMBER}"
echo "env.BUILD_NUMBER = ${env.BUILD_NUMBER}"
echo "foo = ${foo}"
echo "myBuildNumber = ${myBuildNumber}"
}
}
}
}
I am making my own local variable as copy of the 'env' variable (localEnv).
I do this a lot in my jobs because I call custom library DSL-type structure
similar to this:
myCustomThing {
reference = localEnv.BUILD_NUMBER
message = "Something about build ${localEnv.BUILD_NUMBER}"
}
If I use 'env' there, I get a null pointer exception on this closure -
something to do with groovy Closure delegate (that is another question I
guess), so I did this 'def localEnv = env' thing to get around that.
Anyway, for the normal case my job above outputs this after selecting
approve on the input and all is well:
Waiting for input...
Proceed <http://localhost:32779/job/Foo/21/console#> or Abort
<http://localhost:32779/job/Foo/21/console#>
Approved by Bill Dennis <http://localhost:32779/user/bill>
[Pipeline] echo
localEnv.BUILD_NUMBER = 21
[Pipeline] echo
env.BUILD_NUMBER = 21
[Pipeline] echo
foo = Bar
[Pipeline] echo
myBuildNumber = 21
When I restart Jenkins while the input is waiting then approve the input
the output is like this (note the null):
Waiting for input...
Proceed <http://localhost:32781/job/Foo/22/console#> or Abort
<http://localhost:32781/job/Foo/22/console#>
Resuming build at Mon Mar 27 23:48:21 UTC 2017 after Jenkins restart
Ready to run at Mon Mar 27 23:48:32 UTC 2017
Approved by Bill Dennis <http://localhost:32781/user/bill>
[Pipeline] echo
localEnv.BUILD_NUMBER = null
[Pipeline] echo
env.BUILD_NUMBER = 22
[Pipeline] echo
foo = Bar
As can be seen, 'localEnv.BUILD_NUMBER' comes back as *null* after the
Jenkins restart. So it looks like I need to do a deep-copy of the 'env' or
set up many more variables in my environment section for everything that
needs to be available from 'env' surviving a restart, so that things I need
cans be passed to any of my shared library stuff.
Does anyone have any deeper understanding of this?
Thanks,
--Bill
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