如果要使用文件（由于脚本是生成所需值的东西），则可以readFile如下所示使用。如果没有，请使用如下所示sh的script选项：
// Define a groovy global variable, myVar.
// A local, def myVar = 'initial_value', didn't work for me.
// Your mileage may vary.
// Defining the variable here maybe adds a bit of clarity,
// showing that it is intended to be used across multiple stages.
myVar = 'initial_value'
pipeline {
agent { label 'docker' }
stages {
stage('one') {
steps {
echo "${myVar}" // prints 'initial_value'
sh 'echo hotness > myfile.txt'
script {
// OPTION 1: set variable by reading from file.
// FYI, trim removes leading and trailing whitespace from the string
myVar = readFile('myfile.txt').trim()
// OPTION 2: set variable by grabbing output from script
myVar = sh(script: 'echo hotness', returnStdout: true).trim()
}
echo "${myVar}" // prints 'hotness'
}
}
stage('two') {
steps {
echo "${myVar}" // prints 'hotness'
}
}
// this stage is skipped due to the when expression, so nothing is printed
stage('three') {
when {
expression { myVar != 'hotness' }
}
steps {
echo "three: ${myVar}"
}
}
}
}
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