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Bug
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Resolution: Duplicate
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Major
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None
Description:
When using the kubernetes plugin and executing a script inside of a container block, environment variables that contain a literal dollar in their value appear to have an extra dollar added before the existing literal dollar.
E.g. if the environment and container block were:
environment {
FOO="\$BAH"
}
steps {
container('busybox') {
sh 'echo "FOO=$FOO"'
}
}
then the console output shows:
[Pipeline] withEnv
[Pipeline] {
[Pipeline] container
[Pipeline] {
[Pipeline] sh
+ echo 'FOO=$$BAH'
FOO=$$BAH
[Pipeline] }
[Pipeline] // container
[Pipeline] }
[Pipeline] // withEnv
Expected behaviour:
the value of the environment variable is not altered when referenced inside the container block.
Work around:
None that I've found yet.
Other info:
Some other permutations I've tried:
- When the script is executed outside of the container block, the environment variable value is unchanged.
- When the value of the environment variable contains a literal dollar not at the start of the string, the value is still changed. E.g. A value of "Something \$BAH" echoes as "Something $$BAH"
Environment where the bug was seen:
Jenkins: CloudBees Core Managed Master 2.204.3.2-rolling
Kubernetes plugin: 1.23.1
- duplicates
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- Resolved
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FWIW, an ugly workaround I'm using is to use "@@" as a placeholder for "$" in the value of the env var and then use sed to once inside the container block to fix up the env var value. E.g.:
environment { FOO="@@BAH" } steps { container('busybox') { sh ''' #!/bin/bash set +x echo "Before: FOO=$FOO" ## Replace "@@" placeholder with "$" FOO=$( echo $FOO | sed 's/@@/\$/g' ) echo "After: FOO=$FOO" ''' } }gives the desired result in the console output: