Class: CompactIndex::GemInfo

Inherits:
Object
  • Object
show all
Defined in:
lib/compact_index/gem_info.rb

Overview

Return data about all the gems: all gem names, all versions of all gems, all dependencies for all versions of a gem

Defined Under Namespace

Classes: DepKey

Instance Method Summary collapse

Constructor Details

#initialize(connection) ⇒ GemInfo

Returns a new instance of GemInfo.



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# File 'lib/compact_index/gem_info.rb', line 7

def initialize(connection)
  @conn = connection
end

Instance Method Details

#deps_for(gems = []) ⇒ Object

Parameters:

  • array (String) —

    of strings with the gem names



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# File 'lib/compact_index/gem_info.rb', line 12

def deps_for(gems = [])
  dataset =
    if gems.any?
      @conn["        SELECT rv.name, rv.number, rv.platform, rv.required_ruby_version, rv.checksum,\n               rv.rubygems_version, d.requirements, for_dep_name.name dep_name\n        FROM\n          (SELECT r.name, v.number, v.platform,v.rubygems_version, v.checksum,\n                  v.required_ruby_version, v.id AS version_id\n          FROM rubygems AS r, versions AS v\n          WHERE v.rubygem_id = r.id\n            AND v.indexed is true\n            AND r.name IN ?) AS rv\n        LEFT JOIN dependencies AS d ON\n          d.version_id = rv.version_id\n        LEFT JOIN rubygems AS for_dep_name ON\n          d.rubygem_id = for_dep_name.id\n          AND d.scope = 'runtime';\n      SQL\n    else\n      @conn[<<-SQL]\n        SELECT rv.name, rv.number, rv.platform, d.requirements, for_dep_name.name dep_name\n        FROM\n          (SELECT r.name, v.number, v.platform, v.id AS version_id\n          FROM rubygems AS r, versions AS v\n          WHERE v.rubygem_id = r.id\n            AND v.indexed is true) AS rv\n        LEFT JOIN dependencies AS d ON\n          d.version_id = rv.version_id\n        LEFT JOIN rubygems AS for_dep_name ON\n          d.rubygem_id = for_dep_name.id\n          AND d.scope = 'runtime';\n", Sequel.value_list(gems)]
    end

  deps = {}

  dataset.each do |row|
    key = DepKey.new(row[:name], row[:number], row[:platform], row[:required_ruby_version], row[:rubygems_version], row[:checksum])
    deps[key] = [] unless deps[key]
    deps[key] << [row[:dep_name], row[:requirements]] if row[:dep_name]
  end

  deps.map do |dep_key, gem_deps|
    {
      name:                  dep_key.name,
      number:                dep_key.number,
      platform:              dep_key.platform,
      rubygems_version:      dep_key.rubygems_version,
      required_ruby_version: dep_key.required_ruby_version,
      checksum:              dep_key.checksum,
      dependencies:          gem_deps
    }
  end
end

#names ⇒ Object

return list of gem names



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# File 'lib/compact_index/gem_info.rb', line 69

def names
  @conn[:rubygems].select(:name).order(:name).all.map {|r| r[:name] }
end

#versions ⇒ Object

return a list of gem names and their versions



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# File 'lib/compact_index/gem_info.rb', line 74

def versions
  specs_hash = Hash.new {|h, k| h[k] = [] }
  rows = @conn["    SELECT v.full_name, v.number, v.platform\n    FROM versions AS v\n    WHERE v.indexed is true\n"]
  rows.each do |row|
    full_name = row[:full_name]
    version = row[:number]
    version += "-" << row[:platform] unless row[:platform] == "ruby"
    name = full_name.chomp("-" << version)
    specs_hash[name] << version
  end

  specs_hash.each {|k, v| v.sort! }
end