bash_completion: recognize normal command abbreviations
In many common cases, this eliminates a call to "hg help" to get a
complete command name, thus improving responsiveness.
#!/usr/bin/env python
import errno, os, sys
for f in sys.argv[1:]:
try:
print f, '->', os.readlink(f)
except OSError, err:
if err.errno != errno.EINVAL:
raise
print f, 'not a symlink'
sys.exit(0)