]>
jfr.im git - erebus.git/blob - ctlmod.py
1 # Erebus IRC bot - Author: John Runyon
2 # vim: fileencoding=utf-8
3 # module loading/unloading/tracking code
5 from __future__
import print_function
7 import sys
, time
, importlib
10 if sys
.version_info
.major
>= 3:
11 from importlib
import reload # reload is only available as a global in Py2, only in importlib in Py3
13 importlib
.invalidate_caches
= lambda: None # invalidate_caches doesn't exist in Py2
17 #dependents[modname] = [list of modules which depend on modname]
19 def isloaded(modname
): return modname
in modules
20 def modhas(modname
, attname
): return getattr(modules
[modname
], attname
, None) is not None
22 def load(parent
, modname
, dependent
=False):
23 """Wrapper to call _load and print the return value."""
25 print("(Loading dependency %s..." % (modname
), end
=' ')
27 print("%09.3f [MOD] [?] Loading %s..." % (time
.time() % 100000, modname
), end
=' ')
28 modstatus
= _load(parent
, modname
, dependent
)
31 print("failed: %s)" % (modstatus
), end
=' ')
33 print("failed: %s." % (modstatus
))
34 elif modstatus
== True:
41 print("OK: %s)" % (modstatus
), end
=' ')
43 print("OK: %s." % (modstatus
))
46 def _load(parent
, modname
, dependent
=False):
47 """Load and return the new status of the module."""
49 if not isloaded(modname
):
50 importlib
.invalidate_caches()
52 mod
= importlib
.import_module('modules.'+modname
)
53 reload(mod
) #in case it's been previously loaded.
54 except Exception as e
:
55 return modlib
.error(e
)
58 if not hasattr(mod
, 'modinfo'):
59 return modlib
.error('no modinfo')
61 if parent
.APIVERSION
not in mod
.modinfo
['compatible']:
62 return modlib
.error('API-incompatible')
64 modules
[modname
] = mod
65 dependents
[modname
] = []
67 for dep
in mod
.modinfo
['depends']:
68 if bool(int(parent
.cfg
.get('autoloads', dep
, default
=1))):
69 if dep
not in modules
:
70 depret
= load(parent
, dep
, dependent
=True)
71 if depret
is not None and not depret
:
74 return modlib
.error("dependent %s disabled" % (dep
))
75 dependents
[dep
].append(modname
)
77 for dep
in mod
.modinfo
['softdeps']:
78 if bool(int(parent
.cfg
.get('autoloads', dep
, default
=1))):
79 if dep
not in modules
:
80 depret
= load(parent
, dep
, dependent
=True)
81 if depret
is not None and not depret
:
82 successstatus
.append("softdep %s failed" % (dep
))
84 successstatus
.append("softdep %s disabled" % (dep
))
85 #swallow errors loading - softdeps are preferred, not required
88 ret
= mod
.modstart(parent
)
93 del dependents
[modname
]
94 for dep
in mod
.modinfo
['depends']:
95 dependents
[dep
].remove(modname
)
97 successstatus
= ';'.join(successstatus
)
98 if len(successstatus
) > 0 and ret
:
102 return "%s (%s)" % (ret
, successstatus
)
105 else: #if not isloaded...else:
106 return modlib
.error('already loaded')
108 def unload(parent
, modname
):
109 if isloaded(modname
):
110 for dependent
in dependents
[modname
]:
111 unload(parent
, dependent
)
112 for dep
in modules
[modname
].modinfo
['depends']:
113 dependents
[dep
].remove(modname
)
114 ret
= modules
[modname
].modstop(parent
)
118 return modlib
.error('already unloaded')
120 def reloadmod(parent
, modname
):
121 if isloaded(modname
):
122 if modhas(modname
, 'modrestart'): modules
[modname
].modrestart(parent
)
123 else: modules
[modname
].modstop(parent
)
126 reload(modules
[modname
])
127 except BaseException
as e
:
128 return modlib
.error(e
)
130 if modhas(modname
, 'modrestarted'): ret
= modules
[modname
].modrestarted(parent
)
131 else: ret
= modules
[modname
].modstart(parent
)
135 return load(parent
, modname
)
138 def loadall(parent
, modlist
):
139 for m
in modlist
: load(parent
, m
)
140 def unloadall(parent
, modlist
):
141 for m
in modlist
: unload(parent
, m
)
142 def reloadall(parent
, modlist
):
143 for m
in modlist
: reloadmod(parent
, m
)