How to assign git commit hash to a variable in Jenkins File

Question

I am trying to assign the git commit hash to a variable defines in Jenkins pipeline as follows

GIT_COMMIT_HASH = sh "(git log -n 1 --pretty=format:'%H')"

This will print the commit hash in Jenkins build log but it fails to assign the value.

When I try to print the value using

steps{
    script {
                GIT_COMMIT_HASH = sh "(git log -n 1 --pretty=format:'%H')"

                echo "**************************************************"
                echo "${GIT_COMMIT_HASH}"
                echo "**************************************************"
    }
}

This will results null

How may I assign the value?

Answer 1

你必须告诉sh脚本将stdout返回给你的脚本，而不是仅仅将它转储到stdout。

GIT_COMMIT_HASH = sh (script: "git log -n 1 --pretty=format:'%H'", returnStdout: true)

Answer 2

You may use this inside the environment block

Answer 3

You can define a helper function and then call it within your pipeline

def getCommitSha() {
  return sh(returnStdout: true, script: 'git rev-parse HEAD')
}

// to an env var
env.GIT_COMMIT_HASH = getCommitSha()

// to a var within the pipeline
GIT_COMMIT_HASH = getCommitSha()

Answer 4

为什么不直接使用内置的环境变量GIT_COMMIT<\/code> ？

"