Class: Chef::Provider::Package::Yum::RPMUtils
- Inherits:
-
Object
- Object
- Chef::Provider::Package::Yum::RPMUtils
- Defined in:
- lib/chef/provider/package/yum/rpm_utils.rb
Class Method Summary collapse
-
.isalnum(x) ⇒ Object
verify.
- .isalpha(x) ⇒ Object
- .isdigit(x) ⇒ Object
-
.rpmvercmp(x, y) ⇒ Object
based on the reference spec in lib/rpmvercmp.c in rpm 4.9.0.
-
.version_parse(evr) ⇒ Object
RPM::Version version_parse equivalent.
Class Method Details
.isalnum(x) ⇒ Object
verify
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# File 'lib/chef/provider/package/yum/rpm_utils.rb', line 75 def isalnum(x) isalpha(x) || isdigit(x) end |
.isalpha(x) ⇒ Object
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# File 'lib/chef/provider/package/yum/rpm_utils.rb', line 79 def isalpha(x) v = x.ord (v >= 65 && v <= 90) || (v >= 97 && v <= 122) end |
.isdigit(x) ⇒ Object
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# File 'lib/chef/provider/package/yum/rpm_utils.rb', line 84 def isdigit(x) v = x.ord v >= 48 && v <= 57 end |
.rpmvercmp(x, y) ⇒ Object
based on the reference spec in lib/rpmvercmp.c in rpm 4.9.0
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# File 'lib/chef/provider/package/yum/rpm_utils.rb', line 90 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 |
.version_parse(evr) ⇒ Object
RPM::Version version_parse equivalent
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# File 'lib/chef/provider/package/yum/rpm_utils.rb', line 38 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 |