templater: port formatnode filter from changeset_templater
This slightly reduces the difference between changeset_templater and formatter,
and helps extending formatter to support changeset templating.
New formatnode() is not a template filter, but a function since a filter
cannot access to ui. And it's marked as DEPRECATED since I think it exists
only for compatibility reasons.
from __future__ import absolute_import, print_function
import sys
globalvars = {}
lines = sys.stdin.readlines()
while lines:
l = lines.pop(0)
if l.startswith('SALT'):
print(l[:-1])
elif l.startswith('>>> '):
snippet = l[4:]
while lines and lines[0].startswith('... '):
l = lines.pop(0)
snippet += l[4:]
c = compile(snippet, '<heredoc>', 'single')
try:
exec(c, globalvars)
except Exception as inst:
print(repr(inst))