view tests/test-demandimport.py @ 27917:97e0dc6d248c stable

repoview: fix corrupted hiddencache crash Mercurial (issue5042)

Before this patch if the hiddencache existed but was empty, it would crash
mercurial. This patch adds exception handling when reading the hiddencache to
avoid the issue.
When encountering a corrupted cache file we print a devel warning. There would
be no point in issuing a normal warning as the user wouldn't be able to do
anything about the situation.

The warning looks like:

devel-warn: corrupted hidden cache, removing it at: /path/to/repoview.py

from mercurial import demandimport
demandimport.enable()

import os
if os.name != 'nt':
    try:
        import distutils.msvc9compiler
        print ('distutils.msvc9compiler needs to be an immediate '
               'importerror on non-windows platforms')
        distutils.msvc9compiler
    except ImportError:
        pass

import re

rsub = re.sub
def f(obj):
    l = repr(obj)
    l = rsub("0x[0-9a-fA-F]+", "0x?", l)
    l = rsub("from '.*'", "from '?'", l)
    l = rsub("'<[a-z]*>'", "'<whatever>'", l)
    return l

import os

print "os =", f(os)
print "os.system =", f(os.system)
print "os =", f(os)

from mercurial import util

print "util =", f(util)
print "util.system =", f(util.system)
print "util =", f(util)
print "util.system =", f(util.system)

from mercurial import hgweb
print "hgweb =", f(hgweb)
print "hgweb_mod =", f(hgweb.hgweb_mod)
print "hgweb =", f(hgweb)

import re as fred
print "fred =", f(fred)

import sys as re
print "re =", f(re)

print "fred =", f(fred)
print "fred.sub =", f(fred.sub)
print "fred =", f(fred)

print "re =", f(re)
print "re.stderr =", f(re.stderr)
print "re =", f(re)

demandimport.disable()
os.environ['HGDEMANDIMPORT'] = 'disable'
demandimport.enable()
from mercurial import node
print "node =", f(node)