tests/heredoctest.py

dispatch: stop warning about EPIPE in --debug mode

It seems silly for "hg --debug manifest | less" to print a scary
message after the user hits "q" in less.  hg should just exit silently
instead, since EPIPE on stdout is a perfectly reasonable result.

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))