summaryrefslogtreecommitdiff
path: root/portato/backend/flags.py
blob: 163a4f7da0d124c8cb9322975c57934d694c254f (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
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
# -*- coding: utf-8 -*-
#
# File: portato/backend/flags.py
# This file is part of the Portato-Project, a graphical portage-frontend.
#
# Copyright (C) 2006 René 'Necoro' Neumann
# This is free software.  You may redistribute copies of it under the terms of
# the GNU General Public License version 2.
# There is NO WARRANTY, to the extent permitted by law.
#
# Written by René 'Necoro' Neumann <necoro@necoro.net>

from __future__ import absolute_import, with_statement

import os
import os.path
from subprocess import Popen, PIPE # needed for grep
from gettext import lgettext as _

from . import system, is_package
from ..helper import debug, error, unique_array

CONFIG = {
		"usefile" : "portato",
		"maskfile" : "portato",
		"testingfile" : "portato",
		"usePerVersion" : True,
		"maskPerVersion" : True,
		"testingPerVersion" : True
		}

class Constants:

	def __init__ (self):
		self.clear()
	
	def clear (self):
		self._use_path = None
		self._mask_path = None
		self._unmask_path = None
		self._testing_path = None
		self._use_path_is_dir = None
		self._mask_path_is_dir = None
		self._unmask_path_is_dir = None
		self._testing_path_is_dir = None

	def __get (self, name, path):
		if self.__dict__[name] is None:
			self.__dict__[name] = os.path.join(system.get_config_path(), path)

		return self.__dict__[name]

	def __is_dir(self, path):
		name = "_" + path + "_is_dir"
		if self.__dict__[name] is None:
			self.__dict__[name] = os.path.isdir(self.__class__.__dict__[path](self))
		return self.__dict__[name]
	
	def use_path (self):
		return self.__get("_use_path", "package.use")

	def use_path_is_dir (self):
		return self.__is_dir("use_path")

	def mask_path (self):
		return self.__get("_mask_path", "package.mask")

	def mask_path_is_dir (self):
		return self.__is_dir("mask_path")

	def unmask_path (self):
		return self.__get("_unmask_path", "package.unmask")

	def unmask_path_is_dir (self):
		return self.__is_dir("unmask_path")

	def testing_path (self):
		return self.__get("_testing_path", "package.keywords")

	def testing_path_is_dir (self):
		return self.__is_dir("testing_path")

CONST = Constants()

### GENERAL PART ###

def grep (pkg, path):
	"""Grep runs "egrep" on a given path and looks for occurences of a given package.
	@param pkg: the package
	@type pkg: string (cpv) or L{backend.Package}-object
	@param path: path to look in
	@type path: string
	
	@returns: occurences of pkg in the format: "file:line-no:complete_line_found"
	@rtype: string"""

	if not is_package(pkg):
		pkg = system.new_package(pkg) # assume it is a cpv or a gentoolkit.Package

	if os.path.exists(path):
		command = "egrep -x -n -r -H '^[<>!=~]{0,2}%s(-[0-9].*)?[[:space:]]?.*$' %s" # %s is replaced in the next line ;)
		return Popen((command % (pkg.get_cp(), path)), shell = True, stdout = PIPE).communicate()[0].splitlines()
	else:
		return []

def get_data(pkg, path):
	"""This splits up the data of L{grep} and builds tuples in the format (file,line,criterion,list_of_flags).
	@param pkg: package to find
	@type pkg: string (cpv) or L{backend.Package}-object
	@param path: path to look in
	@type path: string
	
	@returns: a list of tuples in the form (file,line,criterion,list_of_flags)
	@rtype: (string,string,string,string[])[]"""
	
	flags = []

	# do grep
	list = grep(pkg, path)
	
	for i in range(len(list)):
		file, line, fl = tuple(list[i].split(":")) # get file, line and flag-list
		fl = fl.split()
		crit = fl[0]
		fl = fl[1:]
		# stop after first comment
		for j in range(len(fl)):
			if fl[j][0] == "#": # comment - stop here
				fl = fl[:j]
				break
		flags.append((file,line,crit,fl))

	return flags

def set_config (cfg):
	"""This function sets the CONFIG-variable for the whole module. Use this instead of modifying L{CONFIG} directly.
	@param cfg: a dictionary with at least all the keys of the CONFIG-var
	@type cfg: dict
	@raises KeyError: if a keyword is missing in the new cfg"""

	for i in CONFIG.keys():
		if not i in cfg:
			raise KeyError, "Missing keyword in config: "+i

	for i in CONFIG:
		CONFIG[i] = cfg[i]

def generate_path (cpv, exp):
	"""Generates the correct path out of given wildcards. 
	These wildcards can be:
		- $(cat) : category
		- $(cat-1): first part of the category (e.g. "app")
		- $(cat-2): second part of the category
		- $(pkg) : name of the package
	
	@param cpv: the cpv of the current package
	@type cpv: string (cat/pkg-ver)
	@param exp: the expression to render the path from
	@type exp: string
	@returns: rendered path
	@rtype string"""

	if exp.find("$(") != -1:
		cat, pkg, ver, rev = system.split_cpv(cpv)
		exp = exp.replace("$(cat)",cat).\
				replace("$(pkg)",pkg).\
				replace("$(cat-1)",cat.split("-")[0]).\
				replace("$(cat-2)",cat.split("-")[1])
	return exp

### USE FLAG PART ###
useFlags = {} # useFlags in the file
newUseFlags = {} # useFlags as we want them to be: format: cpv -> [(file, line, useflag, (true if removed from list / false if added))]

def invert_use_flag (flag):
	"""Invertes a flag.

		>>> invert_use_flag("foo")
		-foo
		>>> invert_use_flag("-bar")
		bar

	@param flag: the flag
	@type flag: string
	@returns: inverted flag
	@rtype: string
	"""
	
	if flag[0] == "-":
		return flag[1:]
	else:
		return "-"+flag

def sort_use_flag_list (flaglist):
	"""
	Sorts a list of useflags. If a use flag starts with "+" or "-" this one is ignored for the matter of sorting.
	This functions sorts the list itself - thus does not create a new one. But for convenience it returns the list too.

	@param flaglist: the list of useflags
	@type flaglist: string[]

	@returns: the sorted list (Note: it is the same as the one passed in)
	@rtype: string[]
	"""
	
	def flag_key (flag):
			if flag.startswith(("+","-")):
				return flag[1:]
			else:
				return flag
	
	flaglist.sort(key = flag_key)
	return flaglist

def filter_defaults (flaglist):
	"""
	Removes "+" and "-" from IUSE defaults.

	@param flaglist: the list of useflags
	@type flaglist: string<iterator>

	@returns: the "cleaned" list
	@rtype: string<iterator>
	"""

	for flag in flaglist:
		if flag.startswith(("+","-")):
			yield flag[1:]
		else:
			yield flag

def set_use_flag (pkg, flag):
	"""Sets the useflag for a given package.
	
	@param pkg: the package
	@type pkg: string (cpv) or L{backend.Package}-object
	@param flag: the flag to set
	@type flag: string"""

	global useFlags, newUseFlags

	if not is_package(pkg):
		pkg = system.new_package(pkg) # assume cpv or gentoolkit.Package

	cpv = pkg.get_cpv()
	invFlag = invert_use_flag(flag)
	
	# if not saved in useFlags, get it by calling get_data() which calls grep()
	data = None
	if not cpv in useFlags:
		data = get_data(pkg, CONST.use_path())
		useFlags[cpv] = data
	else:
		data = useFlags[cpv]

	if not cpv in newUseFlags:
		newUseFlags[cpv] = []

	debug("data: %s", str(data))
	# add a useflag / delete one
	added = False
	for file, line, crit, flags in data:
		if pkg.matches(crit):
			# we have the inverted flag in the uselist/newuselist --> delete it
			if invFlag in flags or (file, line, invFlag, False) in newUseFlags[cpv] or (file, line, flag, True) in newUseFlags[cpv]:
				if added: del newUseFlags[-1] # we currently added it as an extra option - delete it
				added = True
				jumpOut = False
				for t in ((file, line, invFlag, False),(file, line, flag, True)):
					if t in newUseFlags[cpv]:
						newUseFlags[cpv].remove(t)
						jumpOut = True
						# break # don't break as both cases can be valid (see below)
				if not jumpOut:	
					newUseFlags[cpv].append((file, line, invFlag, True))
					
					# we removed the inverted from package.use - but it is still enabled somewhere else
					# so set it explicitly here
					if invFlag in pkg.get_actual_use_flags():
						newUseFlags[cpv].append((file, line, flag, False))
				break
			
			# we want to duplicate the flag --> ignore
			elif flag in flags:
				added = True # emulate adding
				break

			# add as an extra flag
			else:
				if not added: newUseFlags[cpv].append((file, line, flag, False))
				added = True
	
	# create a new line
	if not added:
		path = CONST.use_path()
		if CONST.use_path_is_dir():
			path = os.path.join(CONST.use_path(), generate_path(cpv, CONFIG["usefile"]))
		try:
			newUseFlags[cpv].remove((path, -1, invFlag, False))
		except ValueError: # not in UseFlags
			newUseFlags[cpv].append((path, -1, flag, False))

	newUseFlags[cpv] = unique_array(newUseFlags[cpv])
	debug("newUseFlags: %s", str(newUseFlags))

def remove_new_use_flags (cpv):
	"""Removes all new use-flags for a specific package.
	
	@param cpv: the package for which to remove the flags
	@type cpv: string (cpv) or L{backend.Package}-object"""
	
	if is_package(cpv):
		cpv = cpv.get_cpv()
	
	try:
		del newUseFlags[cpv]
	except KeyError:
		pass

def get_new_use_flags (cpv):
	"""Gets all the new use-flags for a specific package.
	
	@param cpv: the package from which to get the flags
	@type cpv: string (cpv) or L{backend.Package}-object
	@returns: list of flags
	@rtype: string[]"""
	
	if is_package(cpv):
		cpv = cpv.get_cpv()

	list2return = set()
	try:
		for file, line, flag, remove in newUseFlags[cpv]:
			if remove:
				list2return.add("~"+invert_use_flag(flag))
			else:
				list2return.add(flag)
	except KeyError:
		pass

	return list(list2return)

def write_use_flags ():
	"""This writes our changed useflags into the file."""
	global newUseFlags, useFlags

	def insert (flag, list):
		"""Shortcut for inserting a new flag right after the package-name."""
		list.insert(1,flag)
	
	def remove (flag, list):
		"""Removes a flag."""
		try:
			list.remove(flag)
		except ValueError: # flag is given as flag\n
			list.remove(flag+"\n")
			list.append("\n") #re-insert the newline

		# no more flags there - comment it out
		if len(list) == 1 or list[1][0] in ("#","\n"):
			list[0] = "#"+list[0]
			insert("#removed by portato#",list)

	file_cache = {} # cache for having to read the file only once: name->[lines]
	for cpv in newUseFlags:
		flagsToAdd = [] # this is used for collecting the flags to be inserted in a _new_ line

		newUseFlags[cpv].sort(key = lambda x: x[3]) # now the flags are sorted in a manner, that removal comes after appending

		for file, line, flag, delete in newUseFlags[cpv]:
			line = int(line) # it is saved as a string so far!
			# add new line
			if line == -1:
				flagsToAdd.append(flag)
			# change a line
			else:
				if not file in file_cache:
					# read file
					with open(file, "r") as f:
						lines = []
						i = 1
						while i < line: # stop at the given line
							lines.append(f.readline())
							i += 1
						l = f.readline().split(" ")
						
						# delete or insert
						if delete:
							remove(flag,l)
						else:
							insert(flag,l)
						lines.append(" ".join(l))
						
						# read the rest
						lines.extend(f.readlines())
						
						file_cache[file] = lines

				else: # in cache
					l = file_cache[file][line-1].split(" ")
					if delete:
						remove(flag, l)
					else:
						insert(flag,l)
					file_cache[file][line-1] = " ".join(l)

		if flagsToAdd:
		# write new lines
			msg = "\n#portato update#\n"
			if CONFIG["usePerVersion"]: # add on a per-version-base
				msg += "=%s %s\n" % (cpv, ' '.join(flagsToAdd))
			else: # add on a per-package-base
				list = system.split_cpv(cpv)
				msg += "%s/%s %s\n" % (list[0], list[1], ' '.join(flagsToAdd))
			if not file in file_cache:
				f = open(file, "a")
				f.write(msg)
				f.close()
			else:
				file_cache[file].append(msg)
	
	# write to disk
	for file in file_cache.keys():
		f = open(file, "w")
		f.writelines(file_cache[file])
		f.close()
	# reset
	useFlags = {}
	newUseFlags = {}
	system.reload_settings()

### MASKING PART ###
new_masked = {}
new_unmasked = {}

def set_masked (pkg, masked = True):
	"""Sets the masking status of the package.
	
	@param pkg: the package from which to get the flags
	@type pkg: string (cpv) or L{backend.Package}-object
	@param masked: if True: mask it; if False: unmask it
	@type masked: boolean"""
	
	global new_masked, newunmasked
	
	if not is_package(pkg):
		pkg = system.new_package(pkg)

	cpv = pkg.get_cpv()

	if not cpv in new_unmasked:
		new_unmasked[cpv] = []
	if not cpv in new_masked:
		new_masked[cpv] = []

	if masked:
		link_neq = new_masked
		link_eq = new_unmasked
		path = CONST.unmask_path()
	else:
		link_neq = new_unmasked
		link_eq = new_masked
		path = CONST.mask_path()

	copy = link_eq[cpv][:]
	for file, line in copy:
		if line == "-1":
			link_eq[cpv].remove((file, line))
	
	copy = link_neq[cpv][:]
	for file, line in copy:
		if line != "-1":
			link_neq[cpv].remove((file, line))

	if masked == pkg.is_masked():
		return

	data = get_data(pkg, path)
	debug("data: %s", str(data))
	done = False
	for file, line, crit, flags in data:
		if pkg.matches(crit):
			link_eq[cpv].append((file, line))
			done = True

	if done: return

	if masked:
		is_dir = CONST.mask_path_is_dir()
		path = CONST.mask_path()
	else:
		is_dir = CONST.unmask_path_is_dir()
		path = CONST.unmask_path()

	if is_dir:
		file = os.path.join(path, generate_path(cpv, CONFIG["usefile"]))
	else:
		file = path
	
	link_neq[cpv].append((file, "-1"))
	link_neq[cpv] = unique_array(link_neq[cpv])
	debug("new_(un)masked: %s",str(link_neq))

def remove_new_masked (cpv):
	if is_package(cpv):
		cpv = cpv.get_cpv()
	
	try:
		del new_masked[cpv]
	except KeyError:
		pass

	try:
		del new_unmasked[cpv]
	except KeyError:
		pass

def new_masking_status (cpv):
	if is_package(cpv):
		cpv = cpv.get_cpv()

	def get(list):
		ret = None
		if cpv in list and list[cpv] != []:
			for file, line in list[cpv]:
				_ret = (int(line) == -1)
				if ret is not None and _ret != ret:
					error(_("Conflicting values for masking status: %s"), list)
				else:
					ret = _ret
		return ret

	masked = get(new_masked)
	if masked is None:
		masked = get(new_unmasked)
		if masked is not None:
			masked = not masked # revert for new_unmasked

	if masked is not None:
		if masked: return "masked"
		else: return "unmasked"
	else:
		return None

def is_locally_masked (pkg, changes = True):

	if not is_package(pkg):
		pkg = system.new_package(pkg) # assume it is a cpv or a gentoolkit.Package

	if changes:
		if new_masking_status(pkg) == "masked": # we masked it ourselves, but did not save it yet
			# but sometimes, new_masking_status() returns "masked" if a package's unmask is removed
			# then it is masked by the system but not locally (except rarely exotic cases)
			if pkg.get_cpv() in new_unmasked:
				if new_unmasked[pkg.get_cpv()]: return False # assume that there only exists one entry for this package
															 # else new_masking_status should have printed an error
			return True

		if new_masking_status(pkg) == "unmasked": # we unmasked it
			return False
	
	list = get_data(pkg, CONST.mask_path())

	if not list: return False

	for file, line, crit, fl in list:
		if pkg.matches(crit):
			return True

	return False
	
def write_masked ():
	global new_unmasked, new_masked
	file_cache = {}

	def write(cpv, file, line):
		line = int(line)
		# add new line
		if line == -1:
			msg = "\n#portato update#\n"
			if CONFIG["maskPerVersion"]:
				msg += "=%s\n" % cpv
			else:
				list = system.split_cpv(cpv)
				msg += "%s/%s\n" % (list[0],list[1])
			if not file in file_cache:
				f = open(file, "a")
				f.write(msg)
				f.close()
			else:
				file_cache[file].append(msg)
		# change a line
		else:
			if not file in file_cache:
				# read file
				f = open(file, "r")
				lines = []
				i = 1
				while i < line: # stop at the given line
					lines.append(f.readline())
					i = i+1
				# delete
				l = f.readline()
				l = "#"+l[:-1]+" # removed by portato\n"
				lines.append(l)
				
				# read the rest
				lines.extend(f.readlines())
				
				file_cache[file] = lines
				f.close()
			else: # in cache
				l = file_cache[file][line-1]
				# delete:
				l = "#"+l[:-1]+" # removed by portato\n"
				file_cache[file][line-1] = l
	
	
	for cpv in new_masked:
		for file, line in new_masked[cpv]:
			write(cpv, file, line)
	
	for cpv in new_unmasked:
		for file, line in new_unmasked[cpv]:
			write(cpv, file, line)
	
	# write to disk
	for file in file_cache.keys():
		f = open(file, "w")
		f.writelines(file_cache[file])
		f.close()
	# reset
	new_masked = {}
	new_unmasked = {}
	system.reload_settings()

### TESTING PART ###
newTesting = {}
arch = ""

def remove_new_testing (cpv):
	if is_package(cpv):
		cpv = cpv.get_cpv()
	
	try:
		del newTesting[cpv]
	except KeyError:
		pass

def new_testing_status (cpv):
	if is_package(cpv):
		cpv = cpv.get_cpv()

	if cpv in newTesting:
		for file, line in newTesting[cpv]:
			if line == "-1": return False
			else: return True

	return None

def set_testing (pkg, enable):
	"""Enables the package for installing when it is marked as testing (~ARCH).
	@param pkg: the package
	@type pkg: string (cpv) or L{backend.Package}-object
	@param enable: controls whether to enable (True) or disable (False) for test-installing
	@type enable: boolean"""

	global arch, newTesting
	if not is_package(pkg):
		pkg = system.new_package(pkg)

	arch = pkg.get_global_settings("ARCH")
	cpv = pkg.get_cpv()
	if not cpv in newTesting: 
		newTesting[cpv] = []

	for file, line in newTesting[cpv]:
		if (enable and line != "-1") or (not enable and line == "-1"):
			newTesting[cpv].remove((file, line))

	if (enable and not pkg.is_testing(use_keywords=True)) or (not enable and pkg.is_testing(use_keywords=True)):
		return

	if not enable:
		test = get_data(pkg, CONST.testing_path())
		debug("data (test): %s", str(test))
		for file, line, crit, flags in test:
			if pkg.matches(crit) and flags[0] == "~"+arch:
				newTesting[cpv].append((file, line))
	else:
		if CONST.testing_path_is_dir():
			file = os.path.join(CONST.testing_path(), CONFIG["testingfile"])
		else:
			file = CONST.testing_path()
		newTesting[cpv].append((file, "-1"))

	newTesting[cpv] = unique_array(newTesting[cpv])
	debug("newTesting: %s",str(newTesting))

def write_testing ():
	global arch, newTesting
	file_cache = {}

	for cpv in newTesting:
		for file, line in newTesting[cpv]:
			line = int(line)
			# add new line
			if line == -1:
				msg = "\n#portato update#\n"
				if CONFIG["testingPerVersion"]:
					msg += "=%s ~%s\n" % (cpv, arch)
				else:
					list = system.split_cpv(cpv)
					msg += "%s/%s ~%s\n" % (list[0],list[1],arch)
				if not file in file_cache:
					f = open(file, "a")
					f.write(msg)
					f.close()
				else:
					file_cache[file].append(msg)
			# change a line
			else:
				if not file in file_cache:
					# read file
					f = open(file, "r")
					lines = []
					i = 1
					while i < line: # stop at the given line
						lines.append(f.readline())
						i = i+1
					# delete
					l = f.readline()
					l = "#"+l[:-1]+" # removed by portato\n"
					lines.append(l)
					
					# read the rest
					lines.extend(f.readlines())
					
					file_cache[file] = lines
					f.close()
				else: # in cache
					l = file_cache[file][line-1]
					# delete:
					l = "#"+l[:-1]+" # removed by portato\n"
					file_cache[file][line-1] = l
	
	# write to disk
	for file in file_cache.keys():
		f = open(file, "w")
		f.writelines(file_cache[file])
		f.close()
	# reset
	newTesting = {}
	system.reload_settings()