How can I start a bash login shell in jenkins pipeline (formerly known as workflow)?

Question

I am just starting to convert my Jenkins jobs into the new Jenkins Pipeline(workflow) tool, and I'm having trouble getting the sh command to use a bash login shell.

I've tried

sh '''
#!/bin/bash -l
echo $0
'''

but the echo $0 command is always being executed in an interactive shell, rather then a bash login shell.

Answer 1

@izzekil is right!!!! Thank you so much!

So to elaborate a little bit about what is going on. I used sh with ''' , which indicates a multiple line script. HOWEVER, the resulting shell script that gets dumped on to the jenkins node will be one line down, rather then the first line. So I was able to fix this with this

sh '''#!/bin/bash -l
echo $0
# more stuff I needed to do,
# like use rvm, which doesn't work with shell, it needs bash.
'''