view tests/heredoctest.py @ 40602:c36175456350

histedit: import chistedit curses UI from hg-experimental

I don't tend to like curses interfaces, but this gets enough use at
work that it seems like it's worth bringing into core. This is a
minimal import from hg-experimental revision 4c7f33bf5f00, in that
I've done the smallest amount of code movement and editing in order to
import the functionality.

.. feature::

    `hg histedit` will now present a curses UI if curses is available
    and `ui.interface` or `ui.interface.histedit` is set to `curses`.

Differential Revision: https://phab.mercurial-scm.org/D5146

from __future__ import absolute_import, print_function

import sys

def flush():
    sys.stdout.flush()
    sys.stderr.flush()

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:
            flush()
            exec(c, globalvars)
            flush()
        except Exception as inst:
            flush()
            print(repr(inst))