Class: Licensed::Sources::Go

Inherits:
Source
  • Object
show all
Includes:
ContentVersioning
Defined in:
lib/licensed/sources/go.rb

Constant Summary

Constants included from ContentVersioning

ContentVersioning::CONTENTS, ContentVersioning::GIT

Instance Attribute Summary

Attributes inherited from Source

#config

Instance Method Summary collapse

Methods included from ContentVersioning

#contents_hash, #contents_version, #git_version, #version_strategy

Methods inherited from Source

#dependencies, full_type, #ignored?, inherited, #initialize, type, type_and_version

Constructor Details

This class inherits a constructor from Licensed::Sources::Source

Instance Method Details

#contents_version_arguments ⇒ Object

Determines the arguments to pass to contents_version based on which version strategy is selected

Returns an array of arguments to pass to contents version



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# File 'lib/licensed/sources/go.rb', line 127

def contents_version_arguments
  if version_strategy == Licensed::Sources::ContentVersioning::GIT
    ["."]
  else
    Dir["*"]
  end
end

#enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/licensed/sources/go.rb', line 11

def enabled?
  Licensed::Shell.tool_available?("go") && go_source?
end

#enumerate_dependencies ⇒ Object 



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# File 'lib/licensed/sources/go.rb', line 15

def enumerate_dependencies
  with_configured_gopath do
    packages.map do |package|
      import_path = non_vendored_import_path(package)
      error = package.dig("Error", "Err") if package["Error"]

      Dependency.new(
        name: import_path,
        version: package_version(package),
        path: package["Dir"],
        search_root: search_root(package),
        errors: Array(error),
        metadata: {
          "type"        => Go.type,
          "summary"     => package["Doc"],
          "homepage"    => homepage(import_path)
        }
      )
    end
  end
end

#go_list_deps ⇒ Object

Returns the list of dependencies as returned by “go list -json -deps” available in go 1.11



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# File 'lib/licensed/sources/go.rb', line 61

def go_list_deps
  args = ["-deps"]
  args << "-mod=vendor" if config.dig("go", "mod") == "vendor"

  # the CLI command returns packages in a pretty-printed JSON format but
  # not separated by commas. this gsub adds commas after all non-indented
  # "}" that close root level objects.
  # (?!\z) uses negative lookahead to not match the final "}"
  deps = package_info_command(*args).gsub(/^}(?!\z)$/m, "},")
  JSON.parse("[#{deps}]")
end

#go_source? ⇒ Boolean

Returns whether go source is found

Returns:

  • (Boolean) 


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# File 'lib/licensed/sources/go.rb', line 210

def go_source?
  with_configured_gopath { Licensed::Shell.success?("go", "doc") }
end

#go_std_package?(package) ⇒ Boolean

Returns whether the given package import path belongs to the go std library or not

package - package to check as part of the go standard library

Returns:

  • (Boolean) 


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# File 'lib/licensed/sources/go.rb', line 77

def go_std_package?(package)
  return false unless package

  # return true if package self-identifies
  return true if package["Standard"]

  import_path = non_vendored_import_path(package)
  return false unless import_path

  # check different variations of the import path to match against
  # what's returned from `go list std`
  [
    import_path,
    import_path.sub("golang.org", "internal"),
    import_path.sub("golang.org", "golang_org"),
  ].any? do |path|
    # true if go standard packages includes the path or "vendor/<path>"
    go_std_packages.include?(path) || go_std_packages.include?("vendor/#{path}")
  end
end

#go_std_packages ⇒ Object

Returns a list of go standard packages



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# File 'lib/licensed/sources/go.rb', line 215

def go_std_packages
  @std_packages ||= Licensed::Shell.execute("go", "list", "std").lines.map(&:strip)
end

#go_version ⇒ Object

Returns the current version of go available, as a Gem::Version



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# File 'lib/licensed/sources/go.rb', line 233

def go_version
  @go_version ||= begin
    full_version = Licensed::Shell.execute("go", "version").strip
    version_string = full_version.gsub(%r{.*go(\d+\.\d+(\.\d+)?).*}, "\\1")
    Gem::Version.new(version_string)
  end
end

#gopath ⇒ Object

Returns a GOPATH value from either a configuration value or ENV, with the configuration value preferred over the ENV var



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# File 'lib/licensed/sources/go.rb', line 221

def gopath
  return @gopath if defined?(@gopath)

  @gopath = begin
    path = config.dig("go", "GOPATH")
    return File.expand_path(path, config.root) unless path.to_s.empty?
    return ENV["GOPATH"] if ENV["GOPATH"]
    Licensed::Shell.execute("go", "env", "GOPATH")
  end
end

#homepage(import_path) ⇒ Object

Returns the pkg.go.dev page for a package.



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# File 'lib/licensed/sources/go.rb', line 136

def homepage(import_path)
  return unless import_path
  "https://pkg.go.dev/#{import_path}"
end

#local_package?(package) ⇒ Boolean

Returns whether the package is local to the current project

Returns:

  • (Boolean) 


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# File 'lib/licensed/sources/go.rb', line 99

def local_package?(package)
  return false unless package && package["Dir"]
  return false unless File.fnmatch?("#{config.root}*", package["Dir"], File::FNM_CASEFOLD)
  vendored_path_parts(package).nil?
end

#non_vendored_import_path(package) ⇒ Object

Returns the non-vendored portion of the package import path if vendored, otherwise returns the package’s import path as given

package - Package to get the non-vendored import path for



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# File 'lib/licensed/sources/go.rb', line 181

def non_vendored_import_path(package)
  return if package.nil?
  parts = vendored_path_parts(package)
  return parts[:import_path] if parts

  # if a package isn't vendored, return the packages "ImportPath"
  package["ImportPath"]
end

#package_info(import_path) ⇒ Object

Returns a hash of information about the package with a given import path

import_path - Go package import path



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# File 'lib/licensed/sources/go.rb', line 193

def package_info(import_path)
  JSON.parse(package_info_command(import_path))
end

#package_info_command(*args) ⇒ Object

Returns package information as a JSON string

args - additional arguments to ‘go list`, e.g. Go package import path



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# File 'lib/licensed/sources/go.rb', line 200

def package_info_command(*args)
  Licensed::Shell.execute("go", "list", "-e", "-json", *Array(args)).strip
end

#package_version(package) ⇒ Object

Returns the version for a given package

package - package to get version of



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# File 'lib/licensed/sources/go.rb', line 108

def package_version(package)
  # use module version if it exists
  go_mod = package["Module"]
  return go_mod["Version"] if go_mod

  package_directory = package["Dir"]
  return unless package_directory && File.exist?(package_directory)

  # find most recent git SHA for a package, or nil if SHA is
  # not available
  Dir.chdir package_directory do
    contents_version(*contents_version_arguments)
  end
end

#packages ⇒ Object

Returns an array of dependency package import paths



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# File 'lib/licensed/sources/go.rb', line 38

def packages
  dependency_packages = if go_version < Gem::Version.new("1.11.0")
    root_package_deps
  else
    go_list_deps
  end

  # don't include go std packages
  # don't include packages under the root project that aren't vendored
  dependency_packages
    .reject { |pkg| go_std_package?(pkg) }
    .reject { |pkg| local_package?(pkg) }
end

#root_package ⇒ Object

Returns the info for the package under test



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# File 'lib/licensed/sources/go.rb', line 205

def root_package
  @root_package ||= package_info(".")
end

#root_package_deps ⇒ Object

Returns non-ignored packages found from the root packages “Deps” property



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# File 'lib/licensed/sources/go.rb', line 53

def root_package_deps
  # check for ignored packages to avoid raising errors calling `go list`
  # when ignored package is not found
  Parallel.map(Array(root_package["Deps"])) { |name| package_info(name) }
end

#search_root(package) ⇒ Object

Returns the root directory to search for a package license

package - package object obtained from package_info



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# File 'lib/licensed/sources/go.rb', line 144

def search_root(package)
  return if package.nil?

  # search root choices:
  # 1. module directory if using go modules and directory is available
  module_dir = package.dig("Module", "Dir")
  return module_dir if module_dir

  # 2. vendor folder if package is vendored
  parts = vendored_path_parts(package)
  return parts[:vendor_path] if parts

  # 3. package root value if available
  return package["Root"] if package["Root"]

  # 4. GOPATH if the package directory is under the gopath
  return gopath if package["Dir"]&.start_with?(gopath)

  # 5. nil
  nil
end

#vendored_path_parts(package) ⇒ Object

If the package is vendored, returns a Match object containing named :vendor_path and :import_path match groups based on the packages “Dir” value

If the package is not vendored, returns nil

package - Package to get vendored path information for



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# File 'lib/licensed/sources/go.rb', line 172

def vendored_path_parts(package)
  return if package.nil? || package["Dir"].nil?
  package["Dir"].match(/^(?<vendor_path>#{config.root}(\/.+)*\/[^\/]*vendor[^\/]*)\/(?<import_path>.+)$/i)
end