Can't attach the allure report to the Jenkins email - jenkins

Question

The Allure report is not attaching to the Jenkins email. I am using the Jenkins pipeline script and this is my script however this is the error i get in my email:
Groovy Template file [allure-report.groovy] was not found in $JENKINS_HOME/email-templates.
Also I am not able to find allure-report.groovy in my computer
Here is my Jenkins pipeline, I am not sure how to include the template:
pipeline {
agent {
label {
label ""
customWorkspace "/john/qa-end-to-end"
}
}
tools {nodejs "node"}
stages {
stage('Checkout App') {
steps {
dir("${env.HOME}/app") {
echo "Building.."
sh 'git reset --hard HEAD'
sh 'git clean -f -d'
sh 'git pull'
}
}
}
stage('Starting Tests') {
steps {
echo "Starting End to End Tests"
dir("${env.HOME}/qa-end-to-end/") {
sh './tests.sh'
}
}
}
}
post('Publish Report') {
always {
script {
allure([
includeProperties: false,
jdk: '',
properties: [],
reportBuildPolicy: 'ALWAYS',
results: [[path: '$WORKSPACE/${env.HOME}/app/target/allure-results']]
])
}
}
failure {
emailext(
attachmentsPattern: "$WORKSPACE/${env.HOME}/qa-end-to-end/allure-report/index.html",
body: '''${SCRIPT, template="allure-report.groovy"}''',
subject: "Failure in End to End Tests -> Build Number: ${env.BUILD_NUMBER}",
from: "john#gmail.com",
to: "mike#gmail.com"
)
}
}
}

Answer 1

$JENKINS_HOME/email-templates is used to place email body template, generally when you install Jenkins plugin like email, it which includes some pre-defined templates and those templates will be extracted into $JENKINS_HOME/email-templates after plugin installed.
And when you use send email in job's Post Action, you can choose to use one of template of plugin and Jenkins will try to get the template from folder $JENKINS_HOME/email-templates
If you want to use self template, you need to put it into $JENKINS_HOME/email-templates too.
Using custom scripts (those not packaged with email-ext) requires the cooperation of your Jenkins administrator. The steps are relatively simple:
Create the script/template. The name of the script end in the standard extension for the language (.groovy). The template can be named anything
Have your Jenkins administrator place the script inside $JENKINS_HOME\email-templates.
Use the script token with the template parameter equal to your template filename, or in addition the script parameter equal to the custom script name. For example, if the template filename is foobar.template, the email content would look like this ${SCRIPT, template="foobar.template"}.
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