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Type: Bug
Resolution: Won't Do
Priority: Minor
Component/s: email-ext-plugin, token-macro-plugin
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Using email-ext-plugin, when writing a String like <pre>${SOME:TEXT}</pre> in the email body, the String is not processed properly and results in Error processing tokens. Note that using the String <pre>${SOME_TEXT}</pre> does not lead in an error and works properly.

This happens even in the latest version of the plugin.

How to reproduce?

Start a Jenkins instance with email-ext-plugin installed,

Configure SMTP

Use the following pipeline:

#!/usr/bin/env groovy

// NOTE: The only difference between these two reports is the content in the <pre> block. _ vs :

def GOOD_HTML_REPORT = '''\
<html>
    <body>
        <table>
            <tr>
                <td><pre>${SOME_TEXT}</pre></td>
            </tr>
        </table>
    </body>
</html>
'''.stripIndent()

def BAD_HTML_REPORT = '''\
<html>
    <body>
        <table>
            <tr>
                <td><pre>${SOME:TEXT}</pre></td>
            </tr>
        </table>
    </body>
</html>
'''.stripIndent()

pipeline {
    agent any
    stages {
        stage('Test') {
            steps{
                writeFile file: "GoodHTMLReport.html", text: GOOD_HTML_REPORT
                writeFile file: "BadHTMLReport.html", text: BAD_HTML_REPORT
            }
            post {
                success {
                    // THIS WORKS - Results in email with "${SOME_TEXT}"
                    emailext(
                        from: "someemail@company.com",
                        to: "youremail@company.com",  // MODIFY THIS TO YOUR EMAIL ADDRESS
                        subject: "email-ext-plugin issue",
                        body: '${FILE, path="GoodHTMLReport.html"}',
                        mimeType: 'text/html'
                    )
                    // THIS DOES NOT WORK - Results in email with "[Error replacing 'FILE' - Error processing tokens]"
                    emailext(
                        from: "someemail@company.com",
                        to: "youremail@company.com",  // MODIFY THIS TO YOUR EMAIL ADDRESS
                        subject: "email-ext-plugin issue",
                        body: '${FILE, path="BadHTMLReport.html"}',
                        mimeType: 'text/html'
                    )
                }
            }
        }
    }
}

You will receive 2 mails: one containing ${SOME_TEXT} as expected, and the other one containing "[Error replacing 'FILE' - Error processing tokens]".

I did not get enough time to find the exact root cause, but the problem occurs from this method: