groovy install pugin

gistfile1.txt

import jenkins.model.*
import hudson.PluginWrapper
import java.nio.file.*

def pluginDir = new File(Jenkins.instance.rootDir, "plugins")
def pluginList = [
  [name: "git", version: "5.2.1"],
  [name: "workflow-job", version: "2.40"]
]

pluginList.each { plugin ->
    def pluginFile = new File("/opt/jenkins-plugins/${plugin.name}.hpi")
    def destFile = new File(pluginDir, "${plugin.name}.jpi")
    
    if (!destFile.exists()) {
        println "Installing ${plugin.name} version ${plugin.version}"
        Files.copy(pluginFile.toPath(), destFile.toPath(), StandardCopyOption.REPLACE_EXISTING)
    }
}

Jenkins.instance.pluginManager.doCheckUpdatesServer()
Jenkins.instance.pluginManager.doLoad()
Jenkins.instance.restart() // Optional