Initial revision

diff --git a/Lib/cmd.py b/Lib/cmd.py
new file mode 100644 (file)
index 0000000..d28e393
--- /dev/null
+++ b/Lib/cmd.py
@@ -0,0 +1,65 @@
+# 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 = ''
+               return self
+
+       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
+                       print line
+               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 = eval('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 = eval('self.help_' + arg)
+                       except:
+                               print '*** No help on', `arg`
+                               return
+                       func()
+               else:
+                       import getattr
+                       names = getattr.dir(self)
+                       cmds = []
+                       for name in names:
+                               if name[:3] == 'do_':
+                                       cmds.append(name[3:])
+                       print cmds