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1 | 1 | require 'open-uri' |
2 | | -require 'nokogiri' |
| 2 | + |
| 3 | +module MicroXMLParser |
| 4 | + HEADER = %r{<\?xml\s.+\?>\n} |
| 5 | + ATTRIBUTE = %r{(\w+)="([^"]+)"} |
| 6 | + OPEN_TAG = %r{<(\w+)((?:\s+#{ATTRIBUTE})*)>} |
| 7 | + CLOSE_TAG = %r{</(\w+)>} |
| 8 | + TEXT = %r{([^<]*)} |
| 9 | + |
| 10 | + def self.parse(xml) |
| 11 | + xml = xml.strip |
| 12 | + raise xml unless xml.start_with? HEADER |
| 13 | + xml = xml[$&.size..-1].strip |
| 14 | + value, rest = rec(xml) |
| 15 | + raise rest unless rest.empty? |
| 16 | + value |
| 17 | + end |
| 18 | + |
| 19 | + def self.rec(xml) |
| 20 | + xml = xml.strip |
| 21 | + if xml.start_with? OPEN_TAG |
| 22 | + entries = [] |
| 23 | + while xml.start_with? OPEN_TAG |
| 24 | + tag, attributes = $1, $2 |
| 25 | + xml = xml[$&.size..-1].strip |
| 26 | + |
| 27 | + until attributes.empty? |
| 28 | + attributes = attributes.strip |
| 29 | + raise attributes unless attributes.start_with? ATTRIBUTE |
| 30 | + key, value = $1, $2 |
| 31 | + attributes = attributes[$&.size..-1] |
| 32 | + entries << { key.to_sym => value } |
| 33 | + end |
| 34 | + |
| 35 | + value, xml = rec(xml) |
| 36 | + entries << { tag.to_sym => value } |
| 37 | + |
| 38 | + close_tag = "</#{tag}>" |
| 39 | + raise "Missing close tag #{close_tag}: #{xml}" unless xml.start_with? close_tag |
| 40 | + xml = xml[close_tag.size..-1].strip |
| 41 | + end |
| 42 | + |
| 43 | + keys = entries.map { |entry| entry.first.first } |
| 44 | + if keys == keys.uniq |
| 45 | + entries = entries.inject({}, :merge) |
| 46 | + end |
| 47 | + |
| 48 | + [entries, xml] |
| 49 | + elsif xml.start_with? TEXT |
| 50 | + text = $1 |
| 51 | + xml = xml[$&.size..-1] |
| 52 | + [text, xml] |
| 53 | + else |
| 54 | + raise xml |
| 55 | + end |
| 56 | + end |
| 57 | +end |
3 | 58 |
|
4 | 59 | base_url = 'https://oss.sonatype.org/content/repositories/snapshots/org/jruby/jruby-dist' |
5 | 60 | index_url = "#{base_url}/maven-metadata.xml" |
|
8 | 63 | xml = URI.open(index_url, &:read) |
9 | 64 | STDERR.puts xml |
10 | 65 |
|
11 | | -versions = Nokogiri::XML(xml).css('version').map(&:text) |
| 66 | +parsed = MicroXMLParser.parse(xml) |
| 67 | +versions = parsed.dig(:metadata, :versioning, :versions).map { |e| e[:version] } |
12 | 68 | most_recent = (versions - %w[9000.dev-SNAPSHOT]).last |
13 | 69 |
|
14 | 70 | builds_url = "#{base_url}/#{most_recent}/maven-metadata.xml" |
15 | 71 | STDERR.puts builds_url |
16 | 72 | xml = URI.open(builds_url, &:read) |
17 | 73 | STDERR.puts xml |
18 | 74 |
|
19 | | -last_build = Nokogiri::XML(xml).css('snapshotVersion').select { |node| |
20 | | - classifier = node.at('classifier') |
21 | | - classifier and classifier.text == 'bin' and node.at('extension').text == 'tar.gz' |
22 | | -}.map { |node| node.at('value').text }.last |
| 75 | +parsed = MicroXMLParser.parse(xml) |
| 76 | +last_build = parsed.dig(:metadata, :versioning, :snapshotVersions).map { |e| e[:snapshotVersion] }.select { |node| |
| 77 | + node[:classifier] == 'bin' and node[:extension] == 'tar.gz' |
| 78 | +}.map { |node| node[:value] }.last |
23 | 79 |
|
24 | 80 | final_url = "#{base_url}/#{most_recent}/jruby-dist-#{last_build}-bin.tar.gz" |
25 | 81 | puts final_url |
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