mirror of
https://github.com/python/cpython.git
synced 2024-11-27 03:45:08 +08:00
92 lines
2.0 KiB
Python
92 lines
2.0 KiB
Python
# A generic class to build line-oriented command interpreters
|
|
|
|
import string
|
|
import sys
|
|
import linecache
|
|
|
|
PROMPT = '(Cmd) '
|
|
IDENTCHARS = string.letters + string.digits + '_'
|
|
|
|
class Cmd:
|
|
|
|
def __init__(self):
|
|
self.prompt = PROMPT
|
|
self.identchars = IDENTCHARS
|
|
self.lastcmd = ''
|
|
|
|
def cmdloop(self):
|
|
stop = None
|
|
while not stop:
|
|
try:
|
|
line = raw_input(self.prompt)
|
|
except EOFError:
|
|
line = 'EOF'
|
|
stop = self.onecmd(line)
|
|
|
|
def onecmd(self, line):
|
|
line = string.strip(line)
|
|
if not line:
|
|
line = self.lastcmd
|
|
else:
|
|
self.lastcmd = line
|
|
i, n = 0, len(line)
|
|
while i < n and line[i] in self.identchars: i = i+1
|
|
cmd, arg = line[:i], string.strip(line[i:])
|
|
if cmd == '':
|
|
return self.default(line)
|
|
else:
|
|
try:
|
|
func = getattr(self, 'do_' + cmd)
|
|
except AttributeError:
|
|
return self.default(line)
|
|
return func(arg)
|
|
|
|
def default(self, line):
|
|
print '*** Unknown syntax:', line
|
|
|
|
def do_help(self, arg):
|
|
if arg:
|
|
# XXX check arg syntax
|
|
try:
|
|
func = getattr(self, 'help_' + arg)
|
|
except:
|
|
print '*** No help on', `arg`
|
|
return
|
|
func()
|
|
else:
|
|
import newdir
|
|
names = newdir.dir(self.__class__)
|
|
cmds_doc = []
|
|
cmds_undoc = []
|
|
help = {}
|
|
for name in names:
|
|
if name[:5] == 'help_':
|
|
help[name[5:]]=1
|
|
for name in names:
|
|
if name[:3] == 'do_':
|
|
cmd=name[3:]
|
|
if help.has_key(cmd):
|
|
cmds_doc.append(cmd)
|
|
del help[cmd]
|
|
else:
|
|
cmds_undoc.append(cmd)
|
|
print
|
|
self.print_topics("Documented commands (type help " \
|
|
"<topic>):",cmds_doc, 15, 80)
|
|
self.print_topics("Miscellaneous help topics:",
|
|
help.keys(), 15, 80)
|
|
self.print_topics("Undocumented commands:",
|
|
cmds_undoc, 15, 80)
|
|
|
|
def print_topics(self, header, cmds, cmdlen, maxcol):
|
|
if cmds:
|
|
print header;
|
|
print "="*len(header)
|
|
(cmds_per_line,junk)=divmod(maxcol,cmdlen)
|
|
col=cmds_per_line
|
|
for cmd in cmds:
|
|
if col==0: print
|
|
print (("%-"+`cmdlen`+"s") % cmd),
|
|
col = (col+1) % cmds_per_line
|
|
print "\n"
|