tests/heredoctest.py

setdiscovery: don't use dagutil for rev -> node conversions

We don't need to use dagutil to perform a simple rev -> node
conversion.

I haven't measured, but the new code is likely faster, as we
avoid extra function calls and avoid some attribute lookups.

Differential Revision: https://phab.mercurial-scm.org/D4304

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))