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
|
# Author:: Adam Jacob (<adam@chef.io>)
# Copyright:: Copyright 2008-2018, Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require_relative "../../package"
#
# BUGGY AND DEPRECATED: This ruby code is known to not match the python implementation for version comparisons.
# The APIs here should probably be converted to talk to the PythonHelper or just abandonded completely.
#
# e.g. this should just use Chef::Provider::Package::Yum::PythonHelper.instance.compare_versions(x,y)
#
# The python_helper could be extended to support additional APIs in here to remove the ruby code entirely.
#
class Chef
class Provider
class Package
class Yum < Chef::Provider::Package
class RPMUtils
class << self
# RPM::Version version_parse equivalent
def version_parse(evr)
return if evr.nil?
epoch = nil
# assume this is a version
version = evr
release = nil
lead = 0
tail = evr.size
if /^([\d]+):/.match(evr) # rubocop:disable Performance/RedundantMatch
epoch = $1.to_i
lead = $1.length + 1
elsif evr[0].ord == ":".ord
epoch = 0
lead = 1
end
if /:?.*-(.*)$/.match(evr) # rubocop:disable Performance/RedundantMatch
release = $1
tail = evr.length - release.length - lead - 1
if release.empty?
release = nil
end
end
version = evr[lead, tail]
if version.empty?
version = nil
end
[ epoch, version, release ]
end
# verify
def isalnum(x)
isalpha(x) || isdigit(x)
end
def isalpha(x)
v = x.ord
(v >= 65 && v <= 90) || (v >= 97 && v <= 122)
end
def isdigit(x)
v = x.ord
v >= 48 && v <= 57
end
# based on the reference spec in lib/rpmvercmp.c in rpm 4.9.0
def rpmvercmp(x, y)
# easy! :)
return 0 if x == y
if x.nil?
x = ""
end
if y.nil?
y = ""
end
# not so easy :(
#
# takes 2 strings like
#
# x = "1.20.b18.el5"
# y = "1.20.b17.el5"
#
# breaks into purely alpha and numeric segments and compares them using
# some rules
#
# * 10 > 1
# * 1 > a
# * z > a
# * Z > A
# * z > Z
# * leading zeros are ignored
# * separators (periods, commas) are ignored
# * "1.20.b18.el5.extrastuff" > "1.20.b18.el5"
x_pos = 0 # overall string element reference position
x_pos_max = x.length - 1 # number of elements in string, starting from 0
x_seg_pos = 0 # segment string element reference position
x_comp = nil # segment to compare
y_pos = 0
y_seg_pos = 0
y_pos_max = y.length - 1
y_comp = nil
while x_pos <= x_pos_max && y_pos <= y_pos_max
# first we skip over anything non alphanumeric
while (x_pos <= x_pos_max) && (isalnum(x[x_pos]) == false)
x_pos += 1 # +1 over pos_max if end of string
end
y_pos += 1 while (y_pos <= y_pos_max) && (isalnum(y[y_pos]) == false)
# if we hit the end of either we are done matching segments
if (x_pos == x_pos_max + 1) || (y_pos == y_pos_max + 1)
break
end
# we are now at the start of a alpha or numeric segment
x_seg_pos = x_pos
y_seg_pos = y_pos
# grab segment so we can compare them
if isdigit(x[x_seg_pos].ord)
x_seg_is_num = true
# already know it's a digit
x_seg_pos += 1
# gather up our digits
x_seg_pos += 1 while (x_seg_pos <= x_pos_max) && isdigit(x[x_seg_pos])
# copy the segment but not the unmatched character that x_seg_pos will
# refer to
x_comp = x[x_pos, x_seg_pos - x_pos]
y_seg_pos += 1 while (y_seg_pos <= y_pos_max) && isdigit(y[y_seg_pos])
y_comp = y[y_pos, y_seg_pos - y_pos]
else
# we are comparing strings
x_seg_is_num = false
x_seg_pos += 1 while (x_seg_pos <= x_pos_max) && isalpha(x[x_seg_pos])
x_comp = x[x_pos, x_seg_pos - x_pos]
y_seg_pos += 1 while (y_seg_pos <= y_pos_max) && isalpha(y[y_seg_pos])
y_comp = y[y_pos, y_seg_pos - y_pos]
end
# if y_seg_pos didn't advance in the above loop it means the segments are
# different types
if y_pos == y_seg_pos
# numbers always win over letters
return x_seg_is_num ? 1 : -1
end
# move the ball forward before we mess with the segments
x_pos += x_comp.length # +1 over pos_max if end of string
y_pos += y_comp.length
# we are comparing numbers - simply convert them
if x_seg_is_num
x_comp = x_comp.to_i
y_comp = y_comp.to_i
end
# compares ints or strings
# don't return if equal - try the next segment
if x_comp > y_comp
return 1
elsif x_comp < y_comp
return -1
end
# if we've reached here than the segments are the same - try again
end
# we must have reached the end of one or both of the strings and they
# matched up until this point
# segments matched completely but the segment separators were different -
# rpm reference code treats these as equal.
if (x_pos == x_pos_max + 1) && (y_pos == y_pos_max + 1)
return 0
end
# the most unprocessed characters left wins
if (x_pos_max - x_pos) > (y_pos_max - y_pos)
1
else
-1
end
end
end # self
end # RPMUtils
class RPMVersion
include Comparable
def initialize(*args)
if args.size == 1
@e, @v, @r = RPMUtils.version_parse(args[0])
elsif args.size == 3
@e = args[0].to_i
@v = args[1]
@r = args[2]
else
raise ArgumentError, "Expecting either 'epoch-version-release' or 'epoch, " \
"version, release'"
end
end
attr_reader :e, :v, :r
alias epoch e
alias version v
alias release r
def self.parse(*args)
new(*args)
end
def <=>(other)
compare_versions(other)
end
def compare(other)
compare_versions(other, false)
end
def partial_compare(other)
compare_versions(other, true)
end
# RPM::Version rpm_version_to_s equivalent
def to_s
if @r.nil?
@v
else
"#{@v}-#{@r}"
end
end
def evr
"#{@e}:#{@v}-#{@r}"
end
private
# Rough RPM::Version rpm_version_cmp equivalent - except much slower :)
#
# partial lets epoch and version segment equality be good enough to return equal, eg:
#
# 2:1.2-1 == 2:1.2
# 2:1.2-1 == 2:
#
def compare_versions(y, partial = false)
x = self
# compare epoch
if (x.e.nil? == false && x.e > 0) && y.e.nil?
return 1
elsif x.e.nil? && (y.e.nil? == false && y.e > 0)
return -1
elsif x.e.nil? == false && y.e.nil? == false
if x.e < y.e
return -1
elsif x.e > y.e
return 1
end
end
# compare version
if partial && (x.v.nil? || y.v.nil?)
return 0
elsif x.v.nil? == false && y.v.nil?
return 1
elsif x.v.nil? && y.v.nil? == false
return -1
elsif x.v.nil? == false && y.v.nil? == false
cmp = RPMUtils.rpmvercmp(x.v, y.v)
return cmp if cmp != 0
end
# compare release
if partial && (x.r.nil? || y.r.nil?)
return 0
elsif x.r.nil? == false && y.r.nil?
return 1
elsif x.r.nil? && y.r.nil? == false
return -1
elsif x.r.nil? == false && y.r.nil? == false
cmp = RPMUtils.rpmvercmp(x.r, y.r)
return cmp
end
0
end
end
class RPMPackage
include Comparable
def initialize(*args)
if args.size == 4
@n = args[0]
@version = RPMVersion.new(args[1])
@a = args[2]
@provides = args[3]
elsif args.size == 6
@n = args[0]
e = args[1].to_i
v = args[2]
r = args[3]
@version = RPMVersion.new(e, v, r)
@a = args[4]
@provides = args[5]
else
raise ArgumentError, "Expecting either 'name, epoch-version-release, arch, provides' " \
"or 'name, epoch, version, release, arch, provides'"
end
# We always have one, ourselves!
if @provides.empty?
@provides = [ RPMProvide.new(@n, @version.evr, :==) ]
end
end
attr_reader :n, :a, :version, :provides
alias name n
alias arch a
def <=>(other)
compare(other)
end
def compare(y)
x = self
# easy! :)
return 0 if x.nevra == y.nevra
# compare name
if x.n.nil? == false && y.n.nil?
return 1
elsif x.n.nil? && y.n.nil? == false
return -1
elsif x.n.nil? == false && y.n.nil? == false
if x.n < y.n
return -1
elsif x.n > y.n
return 1
end
end
# compare version
if x.version > y.version
return 1
elsif x.version < y.version
return -1
end
# compare arch
if x.a.nil? == false && y.a.nil?
return 1
elsif x.a.nil? && y.a.nil? == false
return -1
elsif x.a.nil? == false && y.a.nil? == false
if x.a < y.a
return -1
elsif x.a > y.a
return 1
end
end
0
end
def to_s
nevra
end
def nevra
"#{@n}-#{@version.evr}.#{@a}"
end
end
# Simple implementation from rpm and ruby-rpm reference code
class RPMDependency
def initialize(*args)
if args.size == 3
@name = args[0]
@version = RPMVersion.new(args[1])
# Our requirement to other dependencies
@flag = args[2] || :==
elsif args.size == 5
@name = args[0]
e = args[1].to_i
v = args[2]
r = args[3]
@version = RPMVersion.new(e, v, r)
@flag = args[4] || :==
else
raise ArgumentError, "Expecting either 'name, epoch-version-release, flag' or " \
"'name, epoch, version, release, flag'"
end
end
attr_reader :name, :version, :flag
# Parses 2 forms:
#
# "mtr >= 2:0.71-3.0"
# "mta"
def self.parse(string)
if /^(\S+)\s+(>|>=|=|==|<=|<)\s+(\S+)$/.match(string) # rubocop:disable Performance/RedundantMatch
name = $1
flag = if $2 == "="
:==
else
:"#{$2}"
end
version = $3
new(name, version, flag)
else
name = string
new(name, nil, nil)
end
end
# Test if another RPMDependency satisfies our requirements
def satisfy?(y)
unless y.is_a?(RPMDependency)
raise ArgumentError, "Expecting an RPMDependency object"
end
x = self
# Easy!
if x.name != y.name
return false
end
# Partial compare
#
# eg: x.version 2.3 == y.version 2.3-1
sense = x.version.partial_compare(y.version)
# Thanks to rpmdsCompare() rpmds.c
if (sense < 0) && ((x.flag == :> || x.flag == :>=) || (y.flag == :<= || y.flag == :<))
return true
elsif (sense > 0) && ((x.flag == :< || x.flag == :<=) || (y.flag == :>= || y.flag == :>))
return true
elsif sense == 0 && (
((x.flag == :== || x.flag == :<= || x.flag == :>=) && (y.flag == :== || y.flag == :<= || y.flag == :>=)) ||
(x.flag == :< && y.flag == :<) ||
(x.flag == :> && y.flag == :>)
)
return true
end
false
end
end
class RPMProvide < RPMDependency; end
class RPMRequire < RPMDependency; end
class RPMDbPackage < RPMPackage
# <rpm parts>, installed, available
def initialize(*args)
@repoid = args.pop
# state
@available = args.pop
@installed = args.pop
super(*args)
end
attr_reader :repoid, :available, :installed
end
# Simple storage for RPMPackage objects - keeps them unique and sorted
class RPMDb
def initialize
# package name => [ RPMPackage, RPMPackage ] of different versions
@rpms = {}
# package nevra => RPMPackage for lookups
@index = {}
# provide name (aka feature) => [RPMPackage, RPMPackage] each providing this feature
@provides = {}
# RPMPackages listed as available
@available = Set.new
# RPMPackages listed as installed
@installed = Set.new
end
def [](package_name)
lookup(package_name)
end
# Lookup package_name and return a descending array of package objects
def lookup(package_name)
pkgs = @rpms[package_name]
if pkgs
pkgs.sort.reverse
else
nil
end
end
def lookup_provides(provide_name)
@provides[provide_name]
end
# Using the package name as a key, and nevra for an index, keep a unique list of packages.
# The available/installed state can be overwritten for existing packages.
def push(*args)
args.flatten.each do |new_rpm|
unless new_rpm.is_a?(RPMDbPackage)
raise ArgumentError, "Expecting an RPMDbPackage object"
end
@rpms[new_rpm.n] ||= []
# we may already have this one, like when the installed list is refreshed
idx = @index[new_rpm.nevra]
if idx
# grab the existing package if it's not
curr_rpm = idx
else
@rpms[new_rpm.n] << new_rpm
new_rpm.provides.each do |provide|
@provides[provide.name] ||= []
@provides[provide.name] << new_rpm
end
curr_rpm = new_rpm
end
# Track the nevra -> RPMPackage association to avoid having to compare versions
# with @rpms[new_rpm.n] on the next round
@index[new_rpm.nevra] = curr_rpm
# these are overwritten for existing packages
if new_rpm.available
@available << curr_rpm
end
if new_rpm.installed
@installed << curr_rpm
end
end
end
def <<(*args)
push(args)
end
def clear
@rpms.clear
@index.clear
@provides.clear
clear_available
clear_installed
end
def clear_available
@available.clear
end
def clear_installed
@installed.clear
end
def size
@rpms.size
end
alias length size
def available_size
@available.size
end
def installed_size
@installed.size
end
def available?(package)
@available.include?(package)
end
def installed?(package)
@installed.include?(package)
end
def whatprovides(rpmdep)
unless rpmdep.is_a?(RPMDependency)
raise ArgumentError, "Expecting an RPMDependency object"
end
what = []
packages = lookup_provides(rpmdep.name)
if packages
packages.each do |pkg|
pkg.provides.each do |provide|
if provide.satisfy?(rpmdep)
what << pkg
end
end
end
end
what
end
end
end
end
end
end
|