tests/hgweberror.py

mergestate: move binary format documentation into _readrecordsv2

This is too low-level to be the top-level documentation for mergestate. We're
restricting the top-level documentation to only be about what consumers of the
mergestate and anyone extending it need to care about.

# A dummy extension that installs an hgweb command that throws an Exception.

from mercurial.hgweb import webcommands

def raiseerror(web, req, tmpl):
    '''Dummy web command that raises an uncaught Exception.'''

    # Simulate an error after partial response.
    if 'partialresponse' in req.form:
        req.respond(200, 'text/plain')
        req.write('partial content\n')

    raise AttributeError('I am an uncaught error!')

def extsetup(ui):
    setattr(webcommands, 'raiseerror', raiseerror)
    webcommands.__all__.append('raiseerror')