aboutsummaryrefslogtreecommitdiffstats
path: root/share/ConfigFile.py
blob: 40ee8f603af2af6be3d6e23080f2e1fd54bcb69b (plain)
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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
#---------------------------------------------------------------
# Project         : Mandrake Linux
# Module          : msec2
# File            : ConfigFile.py
# Version         : $Id$
# Author          : Frederic Lepied
# Created On      : Wed Dec  5 21:42:49 2001
# Purpose         : class abstraction to handle configuration
#                   files.
#---------------------------------------------------------------

import re
import string
import os
import stat
import Config
import commands
from Log import *
import gettext

try:
    cat = gettext.Catalog('msec')
    _ = cat.gettext
except IOError:
    _ = str

BEFORE=0
INSIDE=1
AFTER=2

space = re.compile('\s')

class ConfigFiles:
    def __init__(self):
        self.files = {}
        self.modified_files = []
        self.action_assoc = []

    def add(self, file, path):
        self.files[path] = file

    def modified(self, path):
        if not path in self.modified_files:
            self.modified_files.append(path)

    def get_config_file(self, path, suffix):
        try:
            return self.files[path]
        except KeyError:
            return ConfigFile(path, suffix, self)

    def add_config_assoc(self, regex, action):
        self.action_assoc.append((re.compile(regex), action))

all_files=ConfigFiles()

def move(old, new):
    try:
        os.unlink(new)
    except OSError:
        pass
    try:
        os.rename(old, new)
    except:
        error('rename %s %s: %s' % (old, new, str(sys.exc_value)))

class ConfigFile:
    def __init__(self, path, suffix=None, meta=all_files):
        self.meta=meta
        self.path = Config.get_config('root', '') + path
        self.is_modified = 0
        self.is_touched = 0
        self.is_deleted = 0
        self.is_moved = 0
        self.suffix = suffix
        self.lines = None
        self.sym_link = None
        self.meta.add(self, path)
        
    def get_lines(self):
        if self.lines == None:
            file=None
            try:
                file = open(self.path, 'r')
            except IOError:
                if self.suffix:
                    try:
                        moved = self.path + self.suffix
                        file = open(moved, 'r')
                        move(moved, self.path)
                        self.meta.modified(self.path)
                    except IOError:
                        self.lines = []
                else:
                    self.lines = []
            if file:
                self.lines = string.split(file.read(), "\n")
                file.close()
        return self.lines

    def append(self, value):
        lines = self.lines
        l = len(lines)
        if l > 0 and lines[l - 1] == '':
            lines.insert(l - 1,  value)
        else:
            lines.append(value)
            lines.append('')
            
    def modified(self):
        self.is_modified = 1
        return self
    
    def touch(self):
        self.is_touched = 1
        return self

    def symlink(self, link):
        self.sym_link = link
        return self
    
    def exists(self, really=0):
        return os.path.exists(self.path) or (not really and self.suffix and os.path.exists(self.path + self.suffix))

    def move(self, suffix):
        self.suffix = suffix
        self.is_moved = 1
        
    def unlink(self):
        self.is_deleted = 1
        self.lines=[]
        return self
    
    def write(self):
        if self.is_deleted:
            if self.exists():
                try:
                    os.unlink(self.path)
                except:
                    error('unlink %s: %s' % (self.path, str(sys.exc_value)))
                log(_('deleted %s') % (self.path,))
        elif self.is_modified:
            content = string.join(self.lines, "\n")
            file = open(self.path, 'w')
            file.write(content)
            file.close()
            self.meta.modified(self.path)
        elif self.is_touched:
            if os.path.exists(self.path):
                try:
                    os.utime(self.path, None)
                except:
                    error('utime %s: %s' % (self.path, str(sys.exc_value)))
            elif self.suffix and os.path.exists(self.path + self.suffix):
                move(self.path + self.suffix, self.path)
                try:
                    os.utime(self.path, None)
                except:
                    error('utime %s: %s' % (self.path, str(sys.exc_value)))
            else:
                self.lines = []
                self.is_modified = 1
                file = open(self.path, 'w')
                file.close()
                log(_('touched file %s') % (self.path,))            
        elif self.sym_link:
            done = 0
            if self.exists():
               full = os.lstat(self.path)
               if stat.S_ISLNK(full[stat.ST_MODE]):
                   link = os.readlink(self.path)
                   # to be fixed: resolv relative symlink
                   done = (link == self.sym_link)
               if not done:
                   try:
                       os.unlink(self.path)
                   except:
                       error('unlink %s: %s' % (self.path, str(sys.exc_value)))
                   log(_('deleted %s') % (self.path,))
            if not done:
                try:
                    os.symlink(self.sym_link, self.path)
                except:
                    error('symlink %s %s: %s' % (self.sym_link, self.path, str(sys.exc_value)))
                log(_('made symbolic link from %s to %s') % (self.sym_link, self.path))
                
        if self.is_moved:
            move(self.path, self.path + self.suffix)
            log(_('moved file %s to %s') % (self.path, self.path + self.suffix))
            self.meta.modified(self.path)
        self.is_touched = 0
        self.is_modified = 0
        self.is_deleted = 0
        self.is_moved = 0

    def set_shell_variable(self, var, value, start=None, end=None):
        regex = re.compile('^' + var + '="?([^#"]+)"?(.*)')
        lines = self.get_lines()
        idx=0
        value=str(value)

        if start:
            status = BEFORE
            start = re.compile(start)
        else:
            status = INSIDE

        if end:
            end = re.compile(end)

        idx = None
        for idx in range(0, len(lines)):
            line = lines[idx]
            if status == BEFORE:
                if start.search(line):
                    status = INSIDE
                else:
                    continue
            elif end and end.search(line):
                break
            res = regex.search(line)
            if res:
                if res.group(1) != value:
                    if space.search(value):
                        lines[idx] = var + '="' + value + '"' + res.group(2)
                    else:
                        lines[idx] = var + '=' + value + res.group(2)
                    self.modified()
                    log(_('set variable %s to %s in %s') % (var, value, self.path,))
                return self
        if space.search(value):
            s = var + '="' + value + '"'
        else:
            s = var + '=' + value
        if idx == None or idx == len(lines):
            self.append(s)
        else:
            lines.insert(idx, s)

        self.modified()
        log(_('set variable %s to %s in %s') % (var, value, self.path,))
        return self
    
    def get_shell_variable(self, var):
        regex = re.compile('^' + var + '="?([^#"]+)"?(.*)')
        lines = self.get_lines()
        for idx in range(0, len(lines)):
            res = regex.search(lines[idx])
            if res:
                return res.group(1)
        return None

    def get_match(self, regex, replace=None):
        r=re.compile(regex)
        lines = self.get_lines()
        for idx in range(0, len(lines)):
            res = r.search(lines[idx])
            if res:
                s = substitute_re_result(res, replace)
                return s
        return None

    def replace_line_matching(self, regex, value, at_end_if_not_found=0, all=0, start=None, end=None):
        r=re.compile(regex)
        lines = self.get_lines()
        matches = 0

        if start:
            status = BEFORE
            start = re.compile(start)
        else:
            status = INSIDE

        if end:
            end = re.compile(end)

        idx = None
        for idx in range(0, len(lines)):
            line = lines[idx]
            if status == BEFORE:
                if start.search(line):
                    status = INSIDE
                else:
                    continue
            elif end and end.search(line):
                break
            res = r.search(line)
            if res:
                s = substitute_re_result(res, value)
                matches = matches + 1
                if s != line:
                    log(_("replaced in %s the line %d:\n%s\nwith the line:\n%s") % (self.path, idx, line, s))
                    lines[idx] = s
                    self.modified()
                if not all:
                    return matches
        if matches == 0 and at_end_if_not_found:
            log(_("appended in %s the line:\n%s") % (self.path, value))
            if idx == None or idx == len(lines):
                self.append(value)
            else:
                lines.insert(idx, value)
            self.modified()
            matches = matches + 1
        return matches

    def insert_after(self, regex, value, at_end_if_not_found=0, all=0):
        matches = 0
        r=re.compile(regex)
        lines = self.get_lines()
        for idx in range(0, len(lines)):
            res = r.search(lines[idx])
            if res:
                s = substitute_re_result(res, value)
                log(_("inserted in %s after the line %d:\n%s\nthe line:\n%s") % (self.path, idx, lines[idx], s))
                lines.insert(idx+1, s)
                self.modified()
                matches = matches + 1
                if not all:
                    return matches
        if matches == 0 and at_end_if_not_found:
            log(_("appended in %s the line:\n%s") % (self.path, value))
            self.append(value)
            self.modified()
            matches = matches + 1
        return matches

    def insert_before(self, regex, value, at_top_if_not_found=0, all=0):
        matches = 0
        r=re.compile(regex)
        lines = self.get_lines()
        for idx in range(0, len(lines)):
            res = r.search(lines[idx])
            if res:
                s = substitute_re_result(res, value)
                log(_("inserted in %s before the line %d:\n%s\nthe line:\n%s") % (self.path, idx, lines[idx], s))
                lines.insert(idx, s)
                self.modified()
                matches = matches + 1
                if not all:
                    return matches
        if matches == 0 and at_top_if_not_found:
            log(_("inserted at the top of %s the line:\n%s") % (self.path, value))
            lines.insert(0, value)
            self.modified()
            matches = matches + 1
        return matches

    def insert_at(self, idx, value):
        lines = self.get_lines()
        try:
            lines.insert(idx, value)
            log(_("inserted in %s at the line %d:\n%s") % (self.path, idx, value))
            self.modified()
            return 1
        except KeyError:
            return 0

    def remove_line_matching(self, regex, all=0):
        matches = 0
        r=re.compile(regex)
        lines = self.get_lines()
        for idx in range(len(lines) - 1, -1, -1):
            res = r.search(lines[idx])
            if res:
                log(_("removing in %s the line %d:\n%s") % (self.path, idx, lines[idx]))
                lines.pop(idx)
                self.modified()
                matches = matches + 1
                if not all:
                    return matches
        return matches
    
# utility funtions

def substitute_re_result(res, s):
    for idx in range(0, (res.lastindex or 0) + 1):
        subst = res.group(idx) or ''
        s = string.replace(s, '@' + str(idx), subst)
    return s

def write_files():
    global all_files

    run_commands = Config.get_config('run_commands', 0)
    for f in all_files.files.values():
        f.write()

    for f in all_files.modified_files:
        for a in all_files.action_assoc:
            res = a[0].search(f)
            if res:
                s = substitute_re_result(res, a[1])
                if run_commands != '0':
                    log(_('%s modified so launched command: %s') % (f, s))
                    cmd = commands.getstatusoutput(s)
                    if cmd[0] == 0:
                        log(cmd[1])
                    else:
                        error(cmd[1])
                else:
                    log(_('%s modified so should have run command: %s') % (f, s))
                    
def get_config_file(path, suffix=None):
    global all_files

    return all_files.get_config_file(path, suffix)

def add_config_assoc(regex, action):
    global all_files

    return all_files.add_config_assoc(regex, action)

# ConfigFile.py ends here