1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
#!/usr/bin/python3
# vim:set fileencoding=utf-8 et ts=4 sts=4 sw=4:
# This file is shared between postinst and config
import configparser
import debconf
import os
import sys
PREFIX_SIZE=len('apt-listchannges')
DEFAULT_SEEN_DB='/var/lib/apt/listchanges.db'
SECTION='apt'
def _tmpl2Key(name):
return name[PREFIX_SIZE:].replace('-', '_')
def _debug(*args):
if 'APT_LISTCHANGES_DEBCONF_DEBUG' in os.environ:
print(*args, file=sys.stderr)
def _handleString(cfgkey, config, template, db, fromConfig):
_debug("handleString(", template, cfgkey, fromConfig, ")")
if fromConfig:
value = config.get(SECTION, cfgkey)
if value == 'none': value = ''
db.set(template, value)
else:
value = db.getString(template)
if value == '': value = 'none'
config.set(SECTION, cfgkey, value)
def _handleList(cfgkey, config, template, db, fromConfig):
_debug("handleList(", template, cfgkey, fromConfig, ")")
if fromConfig:
value = config.get(SECTION, cfgkey)
db.set(template, value.lower())
else:
value = db.getString(template)
config.set(SECTION, cfgkey, value)
def _handleBoolean(cfgkey, config, template, db, fromConfig):
value = config.getboolean(SECTION, cfgkey, fallback=None)
_debug("handleBoolean(", template, cfgkey, fromConfig, "), old config value:", value)
if fromConfig:
db.set(template, str(value).lower())
else:
newvalue = db.getBoolean(template)
if value == None or value != newvalue:
config.set(SECTION, cfgkey, str(newvalue).lower())
def _handleSeen(cfgkey, config, template, db, fromConfig):
# The 'save-seen' is very special: a path in config file,
# but in debconf is stored as boolean...
value = config.get(SECTION, cfgkey, fallback=None)
_debug("handleSeen(", template, cfgkey, fromConfig, "), old config value:", value)
if fromConfig:
db.set(template, str(value and value != 'none').lower())
elif not db.getBoolean(template):
value = 'none'
elif not value or value == 'none':
value = DEFAULT_SEEN_DB
config.set(SECTION, cfgkey, value)
NAMES = {'apt-listchanges/frontend' : _handleList,
'apt-listchanges/confirm' : _handleBoolean,
'apt-listchanges/email-address': _handleString,
'apt-listchanges/save-seen' : _handleSeen,
'apt-listchanges/which' : _handleList }
def _updateDebconfFromConfig(config, db):
_debug("updateDebconfFromConfig()")
for tmpl in sorted(NAMES):
cfgkey = _tmpl2Key(tmpl)
if config.has_option(SECTION, cfgkey):
NAMES[tmpl](cfgkey, config, tmpl, db, True)
def _communicateWithDebconf(config, db, is_postinst):
_debug("communicateWithDebconf(", is_postinst, ")")
# Handle frontend first
tmpl = 'apt-listchanges/frontend'
if not is_postinst:
db.forceInput(debconf.MEDIUM, tmpl)
db.go()
frontend = db.get(tmpl)
if is_postinst:
NAMES[tmpl](_tmpl2Key(tmpl), config, tmpl, db, False)
del NAMES[tmpl]
if frontend == 'none':
return
if frontend == 'mail':
del NAMES['apt-listchanges/confirm']
# Handle remaining variables
if not is_postinst:
for tmpl in sorted(NAMES):
db.forceInput(debconf.LOW, tmpl)
db.go()
else:
for tmpl in sorted(NAMES):
NAMES[tmpl](_tmpl2Key(tmpl), config, tmpl, db, False)
def main(argv):
if len(argv) < 3:
print("Usage: script postinst|config config_file mainscript_params",
file=sys.stderr)
sys.exit(1)
debconf.runFrontEnd()
is_postinst = argv[1] == 'postinst' # otherwise it is config
config_file = argv[2]
_debug("apt-listchanges debconf script started(", is_postinst, config_file, ")")
config = configparser.ConfigParser()
config.read(config_file)
if not config.has_section(SECTION):
config.add_section(SECTION)
try:
output = os.fdopen(3, "wt")
except Exception as ex:
_debug("failed to open file descriptor 3", str(ex))
output = sys.stdout
db = debconf.Debconf(write=output)
if not is_postinst:
_updateDebconfFromConfig(config, db)
_communicateWithDebconf(config, db, is_postinst)
if is_postinst:
with open(config_file + '.new', 'wt') as newfile:
config.write(newfile, space_around_delimiters=False)
os.fchmod(newfile.fileno(), 0o644)
if __name__ == "__main__":
main(sys.argv)
sys.exit(0)
|
