![\"\"](\"https:\/\/artem.services\/wp-content\/uploads\/2019\/02\/Jenkins-Logo.png\"){kind=logo}
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If a variable is used in Jenkins Pipeline<\/strong> that is created on the basis of a Webhook<\/strong> or etc, then a task will fail with a manual start. To avoid this, you can add a check for the existence of a variable and set its value.<\/p>\n <\/p>\n In this example, the presence of the variable "GIT_COMMIT_ID<\/strong>" is checked, and if it is absent, a script is executed that sets this variable with the value of the last HASH<\/strong> commit for this branch. This check should be performed only after the "checkout<\/strong>" stage.<\/p>\n","protected":false},"excerpt":{"rendered":" If a variable is used in Jenkins Pipeline that is created on the basis of a Webhook or etc, then a task will fail with a manual start. To avoid this, you can add a check for the existence of a variable and set its value. In this example, the presence of the … \u041f\u0440\u043e\u0434\u043e\u043b\u0436\u0438\u0442\u044c \u0447\u0438\u0442\u0430\u0442\u044c "Jenkins — Check for the existence of a variable"<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[613],"tags":[615,1319,617,641],"_links":{"self":[{"href":"https:\/\/artem.services\/index.php?rest_route=\/wp\/v2\/posts\/1660"}],"collection":[{"href":"https:\/\/artem.services\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/artem.services\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/artem.services\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/artem.services\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1660"}],"version-history":[{"count":3,"href":"https:\/\/artem.services\/index.php?rest_route=\/wp\/v2\/posts\/1660\/revisions"}],"predecessor-version":[{"id":1663,"href":"https:\/\/artem.services\/index.php?rest_route=\/wp\/v2\/posts\/1660\/revisions\/1663"}],"wp:attachment":[{"href":"https:\/\/artem.services\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1660"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/artem.services\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1660"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/artem.services\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\r\npipeline {\r\n agent any\r\n stage('Check ENV') {\r\n when { expression { env.GIT_COMMIT_ID == null } }\r\n steps {\r\n script {\r\n echo "COMMIT ID IS NOT SET"\r\n env.GIT_COMMIT_ID = sh(script: 'git log --format="%H" -n 1', returnStdout: true).trim()\r\n }\r\n }\r\n }\r\n }\r\n} \r\n<\/pre>\n