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931c88a4 | 1 | # Erebus IRC bot - Author: John Runyon |
2 | # module loading/unloading/tracking code | |
3 | ||
a28e2ae9 | 4 | from __future__ import print_function |
5 | ||
9221e6f6 | 6 | import sys, time, importlib |
e4255e70 | 7 | import modlib |
db50981b | 8 | |
a28e2ae9 | 9 | if sys.version_info.major >= 3: |
10 | from importlib import reload | |
9221e6f6 | 11 | else: |
12 | importlib.invalidate_caches = lambda: None | |
a28e2ae9 | 13 | |
db50981b | 14 | modules = {} |
e4255e70 | 15 | dependents = {} |
a8553c45 | 16 | #dependents[modname] = [list of modules which depend on modname] |
db50981b | 17 | |
18 | def isloaded(modname): return modname in modules | |
d431e543 | 19 | def modhas(modname, attname): return getattr(modules[modname], attname, None) is not None |
db50981b | 20 | |
b9c6eb1d | 21 | def load(parent, modname, dependent=False): |
9221e6f6 | 22 | """Wrapper to call _load and print the return value.""" |
b9c6eb1d | 23 | if dependent: |
a28e2ae9 | 24 | print("(Loading dependency %s..." % (modname), end=' ') |
b9c6eb1d | 25 | else: |
a28e2ae9 | 26 | print("%09.3f [MOD] [?] Loading %s..." % (time.time() % 100000, modname), end=' ') |
b9c6eb1d | 27 | modstatus = _load(parent, modname, dependent) |
28 | if not modstatus: | |
a62d0d18 | 29 | if dependent: |
a28e2ae9 | 30 | print("failed: %s)" % (modstatus), end=' ') |
a62d0d18 | 31 | else: |
a28e2ae9 | 32 | print("failed: %s." % (modstatus)) |
b9c6eb1d | 33 | elif modstatus == True: |
34 | if dependent: | |
a28e2ae9 | 35 | print("OK)", end=' ') |
b9c6eb1d | 36 | else: |
a28e2ae9 | 37 | print("OK.") |
b9c6eb1d | 38 | else: |
a62d0d18 | 39 | if dependent: |
a28e2ae9 | 40 | print("OK: %s)" % (modstatus), end=' ') |
a62d0d18 | 41 | else: |
a28e2ae9 | 42 | print("OK: %s." % (modstatus)) |
b9c6eb1d | 43 | return modstatus |
44 | ||
45 | def _load(parent, modname, dependent=False): | |
9221e6f6 | 46 | """Load and return the new status of the module.""" |
a62d0d18 | 47 | successstatus = [] |
db50981b | 48 | if not isloaded(modname): |
9221e6f6 | 49 | importlib.invalidate_caches() |
96d0b31e | 50 | try: |
9221e6f6 | 51 | mod = importlib.import_module('modules.'+modname) |
8ba56606 | 52 | reload(mod) #in case it's been previously loaded. |
83ed3882 | 53 | except Exception as e: |
96d0b31e | 54 | return modlib.error(e) |
20df9fbb | 55 | |
e4255e70 | 56 | |
6b2c681d | 57 | if not hasattr(mod, 'modinfo'): |
58 | return modlib.error('no modinfo') | |
59 | ||
a76c4bd8 | 60 | if parent.APIVERSION not in mod.modinfo['compatible']: |
e4255e70 | 61 | return modlib.error('API-incompatible') |
62 | ||
db50981b | 63 | modules[modname] = mod |
e4255e70 | 64 | dependents[modname] = [] |
65 | ||
66 | for dep in mod.modinfo['depends']: | |
a62d0d18 | 67 | if bool(int(parent.cfg.get('autoloads', dep, default=1))): |
68 | if dep not in modules: | |
69 | depret = load(parent, dep, dependent=True) | |
70 | if depret is not None and not depret: | |
71 | return depret | |
72 | else: | |
73 | return modlib.error("dependent %s disabled" % (dep)) | |
e4255e70 | 74 | dependents[dep].append(modname) |
75 | ||
a62d0d18 | 76 | for dep in mod.modinfo['softdeps']: |
77 | if bool(int(parent.cfg.get('autoloads', dep, default=1))): | |
78 | if dep not in modules: | |
79 | depret = load(parent, dep, dependent=True) | |
80 | if depret is not None: | |
81 | if not depret: | |
82 | successstatus.append("softdep %s failed" % (dep)) | |
83 | else: | |
84 | successstatus.append("softdep %s disabled" % (dep)) | |
85 | #swallow errors loading - softdeps are preferred, not required | |
86 | ||
e4255e70 | 87 | |
db50981b | 88 | ret = mod.modstart(parent) |
a62d0d18 | 89 | if ret is None: |
90 | ret = True | |
91 | if not ret: | |
db50981b | 92 | del modules[modname] |
e4255e70 | 93 | del dependents[modname] |
94 | for dep in mod.modinfo['depends']: | |
95 | dependents[dep].remove(modname) | |
a62d0d18 | 96 | |
97 | successstatus = ';'.join(successstatus) | |
98 | if len(successstatus) > 0 and ret: | |
99 | if ret == True: | |
100 | return successstatus | |
101 | else: | |
102 | return "%s (%s)" % (ret, successstatus) | |
103 | else: | |
104 | return ret | |
e4255e70 | 105 | else: #if not isloaded...else: |
106 | return modlib.error('already loaded') | |
db50981b | 107 | |
108 | def unload(parent, modname): | |
109 | if isloaded(modname): | |
e4255e70 | 110 | for dependent in dependents[modname]: |
111 | unload(parent, dependent) | |
a8553c45 | 112 | for dep in modules[modname].modinfo['depends']: |
e4255e70 | 113 | dependents[dep].remove(modname) |
5a81c82b | 114 | ret = modules[modname].modstop(parent) |
115 | del modules[modname] | |
116 | return ret | |
db50981b | 117 | else: |
e4255e70 | 118 | return modlib.error('already unloaded') |
db50981b | 119 | |
120 | def reloadmod(parent, modname): | |
121 | if isloaded(modname): | |
d431e543 | 122 | if modhas(modname, 'modrestart'): modules[modname].modrestart(parent) |
123 | else: modules[modname].modstop(parent) | |
db50981b | 124 | |
e3878612 | 125 | try: |
65b86c90 | 126 | reload(modules[modname]) |
96d0b31e | 127 | except BaseException as e: |
e3878612 | 128 | return modlib.error(e) |
db50981b | 129 | |
8ba56606 | 130 | if modhas(modname, 'modrestarted'): ret = modules[modname].modrestarted(parent) |
131 | else: ret = modules[modname].modstart(parent) | |
db50981b | 132 | |
8ba56606 | 133 | return ret |
db50981b | 134 | else: |
e3878612 | 135 | return load(parent, modname) |
136 | ||
db50981b | 137 | |
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) |