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#!/usr/bin/env python3
import logging
import sys
from abc import ABC, abstractmethod
from getopt import getopt
import palhm
class ProgConf:
conf = "/etc/palhm/palhm.conf"
cmd = None
override_vl = None
ctx = None
def alloc_ctx ():
ProgConf.ctx = palhm.setup_conf(palhm.load_conf(ProgConf.conf))
if not ProgConf.override_vl is None:
ProgConf.ctx.l.setLevel(ProgConf.override_vl)
def err_unknown_cmd ():
sys.stderr.write("Unknown command. Run '" + sys.argv[0] + " help' for usage.\n")
exit(2)
class Cmd (ABC):
@abstractmethod
def do_cmd (self):
...
class ConfigCmd (Cmd):
def __init__ (self, *args, **kwargs):
pass
def do_cmd (self):
ProgConf.alloc_ctx()
print(ProgConf.ctx)
return 0
def print_help ():
print(
"Usage: " + sys.argv[0] + " config" + '''
Load and parse config. Print the structure to stdout.''')
class RunCmd (Cmd):
def __init__ (self, optlist, args):
self.optlist = optlist
self.args = args
def do_cmd (self):
ProgConf.alloc_ctx()
if self.args:
task = self.args[0]
else:
task = palhm.DEFAULT.RUN_TASK.value
ProgConf.ctx.task_map[task].run(ProgConf.ctx)
return 0
def print_help ():
print(
"Usage: " + sys.argv[0] + " run [TASK]" + '''
Run a task in config. Run the "''' + palhm.DEFAULT.RUN_TASK.value +
'''" task if [TASK] is not specified.''')
class HelpCmd (Cmd):
def __init__ (self, optlist, args):
self.optlist = optlist
self.args = args
def do_cmd (self):
if len(self.args) >= 2:
if not args[0] in CmdMap:
err_unknown_cmd()
else:
CmdMap[self.args[0]].print_help()
else:
HelpCmd.print_help()
return 0
def print_help ():
print(
"Usage: " + sys.argv[0] + " [options] CMD [command options ...]" + '''
Options:
-q Set the verbosity level to 0(FATAL error only). Overrides config
-v Increase the verbosity level by 1. Overrides config
-f FILE Load config from FILE instead of the hard-coded default
Config: ''' + ProgConf.conf + '''
Commands:
run run a task
config load config and print the contents
help [CMD] print this message and exit normally if [CMD] is not specified.
Print usage of [CMD] otherwise''')
return 0
CmdMap = {
"config": ConfigCmd,
"run": RunCmd,
"help": HelpCmd
}
optlist, args = getopt(sys.argv[1:], "qvf:")
optkset = set()
for p in optlist:
optkset.add(p[0])
if "-v" in optkset and "-q" in optkset:
sys.stderr.write("Options -v and -q cannot not used together.\n")
exit(2)
if not args or not args[0] in CmdMap:
err_unknown_cmd()
for p in optlist:
match p[0]:
case "-q": ProgConf.override_vl = logging.ERROR
case "-v":
if ProgConf.override_vl is None:
ProgConf.override_vl = palhm.DEFAULT.VL.value - 10
else:
ProgConf.override_vl -= 10
case "-f": ProgConf.conf = p[1]
logging.basicConfig(format = "%(name)s %(message)s")
ProgConf.cmd = CmdMap[args[0]](optlist, args)
del args[0]
exit(ProgConf.cmd.do_cmd())
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