Use AWS Lambda for sending email on workflow.onComplete

[olgabot]

Capturing while I remember ...

For cloud infrastructure, sendmail is not necessarily available as in the template so allowing the AWS batch pipeline to submit the lambda function to send an email.

[apeltzer]

Should address this centrally in the template 👍

[ewels]

What about mail? The pipeline falls back to this if sendmail doesn't work..

Also, note that we have been intending to strip all of this out for ages now, as it is a central Nextflow feature. So it should probably be added into core Nextflow 😓

[ewels]

cf #112

[ewels]

The Nextflow docs for config scope mail has a snippet showing how the built-in Nextflow email support can send emails via AWS Simple Email Service - https://www.nextflow.io/docs/latest/config.html#scope-mail

mail {
    smtp.host = 'email-smtp.us-east-1.amazonaws.com'
    smtp.port = 587
    smtp.user = '<Your AWS SES access key>'
    smtp.password = '<Your AWS SES secret key>'
    smtp.auth = true
    smtp.starttls.enable = true
    smtp.starttls.required = true
}

Given that we want to rewrite to use the built-in Nextflow support (issue #112) I don't think that we need to have any AWS-specific code in the template. So I think we can close this issue as it's already covered by #112 basically.

Shout if anyone disagrees and we can reopen :)