bashcompletion: show available command-line switches for aliases
When auto-completing hg commands, aliases are listed, but not the available
switches for an alias, because `HGPLAIN=1` filters these out. Add a
`HGPLAINEXCEPT=alias` exception to resolve this.
We make heavy use of aliases that drive hg log with custom revsets, sorting and
the -G switch, but want our users to be able to auto-complete any additional
command-line switches.
#!/usr/bin/env python
from __future__ import print_function
import errno, os, sys
for f in sys.argv[1:]:
try:
print(f, '->', os.readlink(f))
except OSError as err:
if err.errno != errno.EINVAL:
raise
print(f, '->', f, 'not a symlink')
sys.exit(0)