kallithea Changeset - e54ddaa52fee

Changeset - e54ddaa52fee

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Andrew Shadura - 9 years ago 2016-07-24 18:12:14
andrew@shadura.me

hooks: parse incoming git refs correctly

Hooks receive a line of the following format on standard input:

<old-value> SP <new-value> SP <ref-name> LF

where <old-value> is the old object name stored in the ref,
<new-value> is the new object name to be stored in the ref
and <ref-name> is the full name of the ref.

This means, we have to strip at least the LF in order to have a
correct version of the ref name after the split. Also, when
parsing the ref name itself, use all components but first instead
of just second, as a ref name may have slashes in it.

Previously, failure to parse ref name correctly would lead to the
following behaviour. A newly created repository with no commits pushed
has HEAD set to refs/heads/master by default, even though there's no
such ref in the repository yet. Upon first push, Kallithea rewrites
this symbolic reference with a reference to a real branch.

However, due to a bug in ref name parsing, if a ref name had a slash,
Kallithea would update HEAD to an invalid reference:

git push origin feature/branch

would rewrite HEAD to refs/heads/feature. All future attempts to work
with this repository would fail because dulwich would complain it can't
read HEAD as it is a directory.

1 file changed with 2 insertions and 2 deletions:

kallithea/lib/hooks.py

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kallithea/lib/hooks.py

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@@ @@ -403,56 +403,56 @@ def handle_git_receive(repo_path, revs, @@
     # fix if it's not a bare repo
     if repo_path.endswith(os.sep + '.git'):
         repo_path = repo_path[:-5]
     repo = Repository.get_by_full_path(repo_path)
     if not repo:
         raise OSError('Repository %s not found in database'
                       % (safe_str(repo_path)))
     _hooks = dict(baseui.configitems('hooks')) or {}
     if hook_type == 'pre':
         repo = repo.scm_instance
     else:
         #post push shouldn't use the cached instance never
         repo = repo.scm_instance_no_cache()
     if hook_type == 'pre':
         pre_push(baseui, repo)
     # if push hook is enabled via web interface
     elif hook_type == 'post' and _hooks.get(Ui.HOOK_PUSH):
         rev_data = []
         for l in revs:
             old_rev, new_rev, ref = l.split(' ')
+            old_rev, new_rev, ref = l.strip().split(' ')
             _ref_data = ref.split('/')
             if _ref_data[1] in ['tags', 'heads']:
                 rev_data.append({'old_rev': old_rev,
                                  'new_rev': new_rev,
                                  'ref': ref,
                                  'type': _ref_data[1],
-                                 'name': _ref_data[2].strip()})
+                                 'name': '/'.join(_ref_data[2:])})
         git_revs = []
         for push_ref in rev_data:
             _type = push_ref['type']
             if _type == 'heads':
                 if push_ref['old_rev'] == EmptyChangeset().raw_id:
                     # update the symbolic ref if we push new repo
                     if repo.is_empty():
                         repo._repo.refs.set_symbolic_ref('HEAD',
                                             'refs/heads/%s' % push_ref['name'])
                     cmd = ['for-each-ref', '--format=%(refname)','refs/heads/*']
                     heads = repo.run_git_command(cmd)[0]
                     cmd = ['log', push_ref['new_rev'],
                            '--reverse', '--pretty=format:%H', '--not']
                     heads = heads.replace(push_ref['ref'], '')
                     for l in heads.splitlines():
                         cmd.append(l.strip())
                     git_revs += repo.run_git_command(cmd)[0].splitlines()
                 elif push_ref['new_rev'] == EmptyChangeset().raw_id:
                     #delete branch case
                     git_revs += ['delete_branch=>%s' % push_ref['name']]

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