Voila template help for @rosteen, related issue: spacetelescope/jdaviz#1729

find_available_voila_templates.py

import sys
import os
from glob import glob

prefix_targets = [
    "nbconvert/templates",
    "voila/templates",
]

def user_dir():
    homedir = os.path.expanduser('~')
    # Next line will make things work even when /home/ is a symlink to
    # /usr/home as it is on FreeBSD, for example
    homedir = os.path.realpath(homedir)
    if sys.platform == 'darwin':
        return os.path.join(homedir, 'Library', 'Jupyter')
    elif os.name == 'nt':
        appdata = os.environ.get('APPDATA', None)
        if appdata:
            return os.path.join(appdata, 'jupyter')
        else:
            return os.path.join(jupyter_config_dir(), 'data')
    else:
        # Linux, non-OS X Unix, AIX, etc.
        import pathlib
        env = os.environ
        home = pathlib.Path.home().as_posix()
        xdg = env.get("XDG_DATA_HOME", None)
        if not xdg:
            xdg = os.path.join(home, '.local', 'share')
        return os.path.join(xdg, 'jupyter')


target_dir = os.path.join(sys.prefix, 'share', 'jupyter')

for name, target_dir in [
    ("user dir", user_dir()), 
    ("env-specific jupyter dir", os.path.join(target_dir))
]:
    for prefix_target in prefix_targets:
        source = os.path.join('share', 'jupyter', prefix_target)
        target = os.path.join(target_dir, prefix_target)
        target_subdir = os.path.dirname(target)
        available_subdirs = glob(os.path.join(target_subdir, '*', '*'))
        print(f"templates available within {name} '{target}':\n{[os.path.basename(p) for p in available_subdirs if os.path.isdir(p)]}\n")