--- /dev/null
+#!/usr/bin/python
+
+# Interactively prompts for variable values
+# expected arguments are
+# command [default-xml [custom-xml]]
+#
+# Two-steps logic:
+# (1) scans all variables (todo: pass categories as arguments)
+# and prompts for value
+# current value proposed as default
+# also allows to remove site-dependent setting
+# (2) epilogue : allows to
+# list the site-dependent vars with values
+# and to locally (re-)edit a variable from its shell name
+# quit with or without saving
+
+import sys
+import os
+import re
+import readline
+
+from plc_config import PLCConfiguration
+
+####################
+release = "$Id"
+
+def_main_config = "/etc/planetlab/default_config.xml"
+def_site_config = "/etc/planetlab/configs/site.xml"
+
+command_usage="""Usage: %s [default-xml [site-xml]]
+\t default-xml defaults to %s
+\t site-xml defaults to %s
+""" % (sys.argv[0],def_main_config,def_site_config)
+
+####################
+variable_usage= """Special answers :
+#\tShow variable comments
+.\tStops prompting, return to mainloop
+/\tCleans any site-defined value, reverts to default
+=\tShows default value
+>\tSkips to next category
+?\tThis help
+"""
+
+def usage ():
+ print(command_usage)
+ sys.exit(1)
+
+####################
+def get_value (config, category_id, variable_id):
+ (category, variable) = config.get (category_id, variable_id)
+ return variable['value']
+
+# refrain from using plc_config's _sanitize
+def get_varname (config, category_id, variable_id):
+ (category, variable) = config.get (category_id, variable_id)
+ return (category_id+"_"+variable['id']).upper()
+
+def prompt_variable (cdef, cread, cwrite, category, variable):
+
+ assert category.has_key('id')
+ assert variable.has_key('id')
+
+ category_id = category ['id']
+ variable_id = variable['id']
+
+ while True:
+ default_value = get_value(cdef,category_id,variable_id)
+ current_value = get_value(cread,category_id, variable_id)
+ varname = get_varname (cread,category_id, variable_id)
+
+ prompt = "== %s : [%s] " % (varname,current_value)
+ try:
+ answer = raw_input(prompt).strip()
+ except EOFError :
+ raise Exception ('BailOut')
+
+ # no change
+ if (answer == "") or (answer == current_value):
+ return None
+ elif (answer == "."):
+ raise Exception ('BailOut')
+ elif (answer == ">"):
+ raise Exception ('NextCategory')
+ elif (answer == "#"):
+ if friendly_name is not None:
+ print ("### " + friendly_name)
+ if comments == None:
+ print ("!!! No comment associated to %s" % varname)
+ else:
+ for line in comments:
+ print ("# " + line)
+ elif (answer == "?"):
+ print variable_usage.strip()
+ elif (answer == "="):
+ print ("%s defaults to %s" %(varname,default_value))
+ # revert to default : remove from cwrite (i.e. site-config)
+ elif (answer == "/"):
+ cwrite.delete(category_id,variable_id)
+ print ("%s reverted to %s" %(varname,default_value))
+ return
+ else:
+ variable['value'] = answer
+ cwrite.set(category,variable)
+ return
+
+####################
+def prompt_all_variables (cdef, cread, cwrite):
+ try:
+ for (category_id, (category, variables)) in cread.variables().iteritems():
+ print ("========== Category = %s" % category_id)
+ for variable in variables.values():
+ try:
+ newvar = prompt_variable (cdef, cread, cwrite, category, variable)
+ except Exception, inst:
+ if (str(inst) == 'NextCategory'): break
+ else: raise
+
+ except Exception, inst:
+ if (str(inst) == 'BailOut'): return
+ else: raise
+
+
+####################
+def restart_plc ():
+ print ("==================== Stopping plc")
+ os.system("service plc stop")
+ print ("==================== Starting plc")
+ os.system("service plc start")
+
+####################
+mainloop_usage= """Available commands
+c\tEdits commonly tuned variables
+e\tEdits all variables
+p\tPrints all locally-customized vars and values
+e <var>\tPrompts (edit) fro variable <var>
+p <var>\tShows current setting for <var>
+l\tlists all known variables
+w\tSaves and quit
+r\trestarts plc service
+q\tQuits without saving
+"""
+
+re_mainloop_var="^(?P<command>[pe])[ \t]+(?P<varname>\w+)$"
+matcher_mainloop_var=re.compile(re_mainloop_var)
+
+common_variables=("PLC_NAME",
+ "PLC_ROOT_USER",
+ "PLC_ROOT_PASSWORD",
+ "PLC_MAIL_SUPPORT_ADDRESS",
+ "PLC_DB_HOST",
+ "PLC_API_HOST",
+ "PLC_WWW_HOST",
+ "PLC_BOOT_HOST",
+ "PLC_NET_DNS1",
+ "PLC_NET_DNS2")
+
+def mainloop (cdef, cread, cwrite,site_config):
+ while True:
+ try:
+ answer = raw_input("Enter command (c for usual changes, w to save, ? for help) ").strip()
+ except EOFError:
+ answer =""
+ if (answer == "") or (answer == "?") or (answer == "h"):
+ print mainloop_usage
+ elif (answer == "q"):
+ # todo check confirmation
+ return
+ elif (answer == "e"):
+ prompt_all_variables(cdef, cread, cwrite)
+ elif (answer == "w"):
+ try:
+ cwrite.save(site_config)
+ except:
+ print ("Could not save -- fix write access on %s" % site_config)
+ break
+ print ("Wrote %s" % site_config)
+ return
+ elif (answer == "l"):
+ print ("Config involves the following variables")
+ sys.stdout.write(cread.output_variables())
+ elif (answer == "p"):
+ print ("Current site config")
+ sys.stdout.write(cwrite.output_shell(False))
+ elif (answer == "c"):
+ try:
+ for varname in common_variables:
+ (category,variable) = cdef.locate_varname(varname)
+ prompt_variable(cdef, cread, cwrite, category,variable)
+ except Exception, inst:
+ if (str(inst) != 'BailOut'):
+ raise
+ elif (answer == "r"):
+ restart_plc()
+ else:
+ groups_var = matcher_mainloop_var.match(answer)
+ if (groups_var):
+ command = groups_var.group('command')
+ varname = groups_var.group('varname')
+ (category,variable) = cdef.locate_varname(varname)
+ if not category:
+ print "Unknown variable %s" % varname
+ elif (command == 'p'):
+ print ("%s = %s" % (varname,get_value(cwrite,
+ category['id'],
+ variable['id'])))
+ else:
+ try:
+ prompt_variable(cdef, cread, cwrite, category,variable)
+ except Exception, inst:
+ if (str(inst) != 'BailOut'):
+ raise
+ else:
+ print ("Unknown command >%s<" % answer)
+
+####################
+def main ():
+
+ save = True
+ command=sys.argv[0]
+ argv = sys.argv[1:]
+ if len(argv) == 0:
+ (main_config,site_config) = (def_main_config, def_site_config)
+ elif len(argv) == 1:
+ (main_config,site_config) = (argv[1], def_site_config)
+ elif len(argv) == 2:
+ (main_config, site_config) = argv
+ else:
+ usage()
+
+ try:
+ # the default settings only - read only
+ cdef = PLCConfiguration(main_config)
+
+ # in effect : default settings + local settings - read only
+ cread = PLCConfiguration(main_config)
+
+ except:
+ print ("default config files not found, is myplc installed ?")
+ return 1
+
+ # local settings only, will be modified & saved
+ cwrite=PLCConfiguration()
+
+ try:
+ cread.load(site_config)
+ cwrite.load(site_config)
+ except:
+ cwrite = PLCConfiguration()
+
+ print ("This is %s - %s -- Type ? at the prompt for help" %(command,release))
+ mainloop (cdef, cread, cwrite,site_config)
+ return 0
+
+if __name__ == '__main__':
+ main()
git://git.onelab.eu / myplc.git / commitdiff