Move cmdtable and reposetup handling out of extensions.py
A new function (extensions.extensions) allows the code that is
interested in those attributes to handle them directly.
This allows some cleanups of extensions.py. Notably, we can
remove the extensions.commandtable hack.
It also makes it easier to add standard extension attributes,
like a "hgwebsetup" function or a "helptable" dict that augments
the data in help.py, etc.
#!/bin/sh
# test children command
cat <<EOF >> $HGRCPATH
[extensions]
hgext.children=
EOF
echo "% init"
hg init t
cd t
echo "% no working directory"
hg children
echo % setup
echo 0 > file0
hg ci -qAm 0 -d '0 0'
echo 1 > file1
hg ci -qAm 1 -d '1 0'
echo 2 >> file0
hg ci -qAm 2 -d '2 0'
hg co null
echo 3 > file3
hg ci -qAm 3 -d '3 0'
echo "% hg children at revision 3 (tip)"
hg children
hg co null
echo "% hg children at nullrev (should be 0 and 3)"
hg children
hg co 1
echo "% hg children at revision 1 (should be 2)"
hg children
hg co 2
echo "% hg children at revision 2 (other head)"
hg children
for i in null 0 1 2 3; do
echo "% hg children -r $i"
hg children -r $i
done
echo "% hg children -r 0 file0 (should be 2)"
hg children -r 0 file0
echo "% hg children -r 1 file0 (should be 2)"
hg children -r 1 file0
hg co 0
echo "% hg children file0 at revision 0 (should be 2)"
hg children file0