Class: Gem::Commands::NixCommand
- Inherits:
-
Gem::Command
- Object
- Gem::Command
- Gem::Commands::NixCommand
- Defined in:
- lib/nix/gem-nix-command.rb,
lib/rubygems_plugin.rb
Instance Method Summary collapse
-
#adddep(dep) ⇒ Object
helper funtions ================.
-
#arguments ⇒ Object
:nodoc:.
-
#defaults_str ⇒ Object
:nodoc:.
-
#description ⇒ Object
:nodoc:.
- #exec ⇒ Object
- #execute ⇒ Object
-
#find_gem_with_source(dep) ⇒ Object
copied from various rubygems sources, added caching to speedup subsequent executions TODO: develop a patch to rubygems sources that will increase speed for all users.
-
#initialize ⇒ NixCommand
constructor
A new instance of NixCommand.
-
#usage ⇒ Object
:nodoc:.
Constructor Details
#initialize ⇒ NixCommand
Returns a new instance of NixCommand.
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# File 'lib/rubygems_plugin.rb', line 5 def initialize defaults = Gem::DependencyInstaller::DEFAULT_OPTIONS.merge({ :system_generated_nix => ENV.fetch('NIXPKGS_ALL', '/etc/nixos/nixpkgs') + '/pkgs/development/interpreters/ruby/generated.nix', :user_generated_nix => ENV['HOME'] + '/.nixpkgs/gems/generated.nix', :user_install => true, :nix_file => nil, :ignore_existing => false }) super 'nix', 'Create a nix file containing expressions of the gems', defaults add_option('--nix-file=/path/to/generated.nix', 'Use specified nix file instead of default one') do |value, | [:nix_file] = value end add_option('--[no-]user-install', "Which generated.nix file to use:", " * user-specific (#{defaults[:user_generated_nix]})", " * system-wide (#{defaults[:system_generated_nix]})" ) do |value, | [:user_install] = value end add_option('--[no-]ignore-existing', 'Ignore gems from the previous run') do |value, | [:ignore_existing] = value end end |
Instance Method Details
#adddep(dep) ⇒ Object
helper funtions ================
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# File 'lib/nix/gem-nix-command.rb', line 160 def adddep(dep) say "adding dep #{dep.name}." if Gem.configuration.really_verbose spec, source_uri = find_gem_with_source(dep) full_name = spec.full_name return if @gems_with_deps.key?(full_name) @gems_with_deps[full_name] = nil # there maybe circular dependencies. thus mark this gem seen as early as possible # development deps can't be found. Some are old. Thus only add rutime dependencies deps = spec.dependencies.find_all { |d| d.type != :development } say " total deps of #{full_name}: #{deps.length}" if Gem.configuration.really_verbose # recurse while collecting deps dep_specs = deps.map { |dep| adddep(dep) } @gems_with_deps[full_name] = [ spec, source_uri, dep_specs ] spec # only return spec, no source for dep list end |
#arguments ⇒ Object
:nodoc:
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# File 'lib/rubygems_plugin.rb', line 45 def arguments # :nodoc: "GEMNAME name of gem to be added to the expressions file" end |
#defaults_str ⇒ Object
:nodoc:
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# File 'lib/rubygems_plugin.rb', line 49 def defaults_str # :nodoc: # what to put in here ? TODO (probably nothing is ok) "" end |
#description ⇒ Object
:nodoc:
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# File 'lib/rubygems_plugin.rb', line 32 def description # :nodoc: <<-EOF create a nix file containing expressions of the gems There are many gems. So it's best to only specify some target gems and take them into acocunt with their deps TODO more details EOF end |
#exec ⇒ Object
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# File 'lib/nix/gem-nix-command.rb', line 81 def exec begin @prerelease = false; [:nix_file] = [:nix_file] || ([:user_install] ? [:user_generated_nix] : [:system_generated_nix]) args = [:args] if FileTest.exists?([:nix_file]) raise "File #{[:nix_file]} is not a regular file" unless FileTest.file?([:nix_file]) File.open([:nix_file], 'r') do |f| l = f.readlines.select {|s| s =~ /gem_nix_args =/}.first args += l. sub(/ *gem_nix_args = \[ (.*) \];/, '\1').split(' '). map do |s| s.sub(/\A''/, '').sub(/''\Z/, '') end end unless [:ignore_existing] end args.sort! args.uniq! say "Will generate nix file for the following gems: #{args.join ', '}" if Gem::configuration.really_verbose @gems_with_deps = {} # args to dep informations args.each { |arg| if arg =~ /(.+)-?(.*)?/ then gem_name = $1 version = $2.empty? ? Gem::Requirement.default : Gem::Version.new($2) else raise Gem::CommandLineError, "couldn't parse arg. expected: name or name-version" end adddep(Gem::Dependency.new gem_name, version) } say " total: #{@gems_with_deps.length}" if Gem.configuration.really_verbose # define aliases aliases = {} output_gems = {} @gems_with_deps.each_value do |(spec, src, deps)| if !aliases.key?(spec.name) or aliases[spec.name].version < spec.version aliases[spec.name] = spec end output_gems[spec.nix_name(:symbol)] = spec.nix_derivation.merge({ :requiredGems => deps.compact.map { |d| d.nix_name(:rhs_sym) } }) end File.open([:nix_file], 'w') do |f| f << "# WARNING: automatically generated file\n" f << "# Generated by 'gem nix' command that comes from 'nix' gem\n" f << "g: # Get dependencies from patched gems\n" f << ({ :gem_nix_args => args, :gems => output_gems, :aliases => aliases.values.inject({}) do |h, s| h[s.nix_name(:short_sym)] = s.nix_name(:rhs_sym) h end }.to_nix) << "\n" end exit_code = 0 rescue => e puts e.inspect puts e.backtrace end end |
#execute ⇒ Object
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# File 'lib/rubygems_plugin.rb', line 54 def execute require 'nix/gem-nix-command' unless respond_to? :exec exec end |
#find_gem_with_source(dep) ⇒ Object
copied from various rubygems sources, added caching to speedup subsequent executions TODO: develop a patch to rubygems sources that will increase speed for all users
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# File 'lib/nix/gem-nix-command.rb', line 185 def find_gem_with_source(dep) if @specs_by_name.nil? or @specs_by_name.empty? @specs_by_name = { } f = Gem::SpecFetcher.fetcher f.list(true, @prerelease).map do |source_uri, specs| specs.each do |spec_name, version, spec_platform| if Gem::Platform.match(spec_platform) @specs_by_name[spec_name] = [] unless @specs_by_name.key?(spec_name) @specs_by_name[spec_name].push([version, spec_platform, source_uri]) end end end end raise "#{dep.name} not found!" unless @specs_by_name.key?(dep.name) found = @specs_by_name[dep.name].select do |version, spec_platform, source_uri| dep.match?(dep.name, version) end raise Gem::CommandLineError, "couldn't find #{dep}" if found.empty? latest = found.sort { |a, b| a.first <=> b.first }.last [Gem::SpecFetcher.fetcher.fetch_spec([dep.name, latest.first, latest[1]], latest.last), latest.last.to_s] end |
#usage ⇒ Object
:nodoc:
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# File 'lib/rubygems_plugin.rb', line 41 def usage # :nodoc: "#{program_name} GEMNAME [GEMNAME ...] [options] -- --build-flags" end |