util: move common proxyobserver attributes to the base class
Fixes the following pytype warnings:
line 791, in _writedata: No attribute 'logdata' on baseproxyobserver [attribute-error]
line 792, in _writedata: No attribute 'logdataapis' on baseproxyobserver [attribute-error]
line 793, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 794, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 799, in _writedata: No attribute 'logdataapis' on baseproxyobserver [attribute-error]
line 800, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 802, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 803, in _writedata: No attribute 'name' on baseproxyobserver [attribute-error]
line 805, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 809, in _writedata: No attribute 'logdataapis' on baseproxyobserver [attribute-error]
line 810, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 814, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 815, in _writedata: No attribute 'name' on baseproxyobserver [attribute-error]
line 817, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
Differential Revision: https://phab.mercurial-scm.org/D7675
#require bzr
$ . "$TESTDIR/bzr-definitions"
$ cat > treeset.py <<EOF
> import sys
> from bzrlib import workingtree
> wt = workingtree.WorkingTree.open('.')
>
> message, rootid = sys.argv[1:]
> wt.set_root_id('tree_root-%s' % rootid)
> wt.commit(message)
> EOF
change the id of the tree root
$ mkdir test-change-treeroot-id
$ cd test-change-treeroot-id
$ bzr init -q source
$ cd source
$ echo content > file
$ bzr add -q file
$ bzr commit -q -m 'Initial add'
$ "$PYTHON" ../../treeset.py 'Changed root' new
$ cd ..
$ hg convert source source-hg
initializing destination source-hg repository
scanning source...
sorting...
converting...
1 Initial add
0 Changed root
$ manifest source-hg tip
% manifest of tip
644 file
$ cd ..