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Manuel Jacob

controllers: don’t pass start=0 to BaseRepository.get_changesets()

MercurialRepository.get_changesets() can fail if passing start=0 if the
revision 0 is not in self.revisions. That can happen if revision 0 is not in
the visible subset of the revisions in the repository. Before Kallithea
changeset 7c43e15fb8bc7a73f17f577e59a4698589b6809d, it was working by chance
because start=0 was treated like start=None in the relevant places
(GitRepository.get_changesets still does that).

The intention of passing start=0 was seemingly to not limit the start.
Therefore passing start=None (or nothing, as it’s the default value) should be
correct.

I got the following traceback before this change:

Traceback (most recent call last):
File "~/vcs/kallithea/kallithea/controllers/changelog.py", line 117, in index
collection = c.db_repo_scm_instance.get_changesets(start=0, end=revision,
File "~/vcs/kallithea/kallithea/lib/vcs/backends/hg/repository.py", line 529, in get_changesets
start_pos = None if start is None else self.revisions.index(start_raw_id)
ValueError: '4257f758b3eaacaebb6956d1aefc019afab956b8' is not in list

#!/usr/bin/env python3
"""
pyflakes with filter configuration for Kallithea.
Inspired by pyflakes/api.py and flake8/plugins/pyflakes.py .
"""

import sys

import pyflakes.api
import pyflakes.messages


class Reporter:

    warned = False

    def flake(self, warning):
        # ignore known warnings
        if isinstance(warning, pyflakes.messages.UnusedVariable):
            return
        if warning.filename == 'kallithea/bin/kallithea_cli_ishell.py':
            if isinstance(warning, pyflakes.messages.ImportStarUsed) and warning.message_args == ('kallithea.model.db',):
                return
            if isinstance(warning, pyflakes.messages.UnusedImport) and warning.message_args == ('kallithea.model.db.*',):
                return

        print('%s:%s %s   [%s %s]' % (warning.filename, warning.lineno, warning.message % warning.message_args, type(warning).__name__, warning.message_args))
        self.warned = True

    def unexpectedError(self, filename, msg):
        print('Unexpected error for %s: %s' % (filename, msg))


reporter = Reporter()

for filename in sorted(set(sys.argv[1:])):
    pyflakes.api.checkPath(filename, reporter=reporter)
if reporter.warned:
    raise SystemExit(1)