Class: Tetra::PomGetter

Inherits:
Object
  • Object
show all
Includes:
Logging
Defined in:
lib/tetra/pom_getter.rb

Overview

attempts to get java projects’ pom file

Instance Method Summary collapse

Methods included from Logging

#log

Instance Method Details

#cleanup_name(path) ⇒ Object

get a heuristic name from a path



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# File 'lib/tetra/pom_getter.rb', line 100

def cleanup_name(path)
  Pathname.new(path).basename.to_s.sub(/.jar$/, "")
end

#get_pom(filename) ⇒ Object

saves a jar poms in <jar_filename>.pom returns filename and status if found, else nil



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# File 'lib/tetra/pom_getter.rb', line 10

def get_pom(filename)
  content, status = (get_pom_from_jar(filename) || get_pom_from_sha1(filename) || get_pom_from_heuristic(filename))
  return unless content

  pom_filename = filename.sub(/(\.jar)?$/, ".pom")
  File.open(pom_filename, "w") { |io| io.write(content) }
  [pom_filename, status]
end

#get_pom_from_heuristic(filename) ⇒ Object

returns a pom from search.maven.org with a heuristic name search



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# File 'lib/tetra/pom_getter.rb', line 61

def get_pom_from_heuristic(filename)
  begin
    log.debug("Attempting heuristic POM search for #{filename}")
    site = MavenWebsite.new
    filename = cleanup_name(filename)
    version_matcher = VersionMatcher.new
    my_artifact_id, my_version = version_matcher.split_version(filename)
    log.debug("Guessed artifact id: #{my_artifact_id}, version: #{my_version}")

    result = site.search_by_name(my_artifact_id).first
    log.debug("Artifact id search result: #{result}")
    unless result.nil?
      group_id, artifact_id, = site.get_maven_id_from result
      results = site.search_by_group_id_and_artifact_id(group_id, artifact_id)
      log.debug("All versions: #{results}")
      their_versions = results.map { |doc| doc["v"] }
      best_matched_version = (
        if !my_version.nil?
          version_matcher.best_match(my_version, their_versions)
        else
          their_versions.max
        end
      )
      best_matched_result = (results.select { |r| r["v"] == best_matched_version }).first

      group_id, artifact_id, version = site.get_maven_id_from(best_matched_result)
      log.warn("pom.xml for #{filename} found on search.maven.org with heuristic search\
        (#{group_id}:#{artifact_id}:#{version})"
              )

      return site.download_pom(group_id, artifact_id, version), :found_via_heuristic
    end
  rescue NotFoundOnMavenWebsiteError
    log.warn("Got a 404 error while looking for #{filename} heuristically in search.maven.org")
  end
  nil
end

#get_pom_from_jar(file) ⇒ Object

returns a pom embedded in a jar file



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# File 'lib/tetra/pom_getter.rb', line 20

def get_pom_from_jar(file)
  log.debug("Attempting unpack of #{file} to find a POM")
  begin
    Zip::File.foreach(file) do |entry|
      if entry.name =~ %r{/pom.xml$}
        log.info("pom.xml found in #{file}##{entry.name}")
        return entry.get_input_stream.read, :found_in_jar
      end
    end
  rescue Zip::Error
    log.warn("#{file} does not seem to be a valid jar archive, skipping")
  rescue TypeError
    log.warn("#{file} seems to be a valid jar archive but is corrupt, skipping")
  end
  nil
end

#get_pom_from_sha1(file) ⇒ Object

returns a pom from search.maven.org with a jar sha1 search



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# File 'lib/tetra/pom_getter.rb', line 38

def get_pom_from_sha1(file)
  log.debug("Attempting SHA1 POM lookup for #{file}")
  begin
    if File.file?(file)
      site = MavenWebsite.new
      sha1 = Digest::SHA1.hexdigest File.read(file)
      results = site.search_by_sha1(sha1).select { |result| result["ec"].include?(".pom") }
      result = results.first
      unless result.nil?
        log.info("pom.xml for #{file} found on search.maven.org for sha1 #{sha1}\
          (#{result['g']}:#{result['a']}:#{result['v']})"
                )
        group_id, artifact_id, version = site.get_maven_id_from result
        return site.download_pom(group_id, artifact_id, version), :found_via_sha1
      end
    end
  rescue NotFoundOnMavenWebsiteError
    log.warn("Got a 404 error while looking for #{file}'s SHA1 in search.maven.org")
  end
  nil
end