jinja2 basename or dirname from builtin filters?

Question

Is there any way of doing a basename or dirname in jinja2 using only builtin filters? E.g. something like:

#!/usr/bin/python
import jinja2

mybin = '/my/favorite/full/path/foo'
t = jinja2.Template("my binary is {{ mybin }}")
print t.render()
t = jinja2.Template("my basename is {{ mybin|basename() }}")
print t.render()
t = jinja2.Template("my dirname is {{ mybin|dirname() }}")
print t.render()

1

Any ideas?

Answer 1

If you found this question & are using Ansible, then these filters do exist in Ansible.

To get the last name of a file path, like ‘foo.txt’ out of ‘/etc/asdf/foo.txt’:

{{ path | basename }}

To get the directory from a path:

{{ path | dirname }}

Without Ansible, it's easy to add custom filters to Jinja2:

def basename(path):
    return os.path.basename(path)

def dirname(path):
    return os.path.dirname(path)

You register these in the template environment by updating the filters dictionary in the environment, prior to rendering the template:

environment.filters['basename'] = basename
environment.filters['dirname']  = dirname