Save gem root

exe/diversipub

@@ -2,11 +2,12 @@
 # frozen_string_literal: true
 
 gem_name = 'diversipub'
+gem_root = File.expand_path('..', __dir__).freeze
 
 begin
   require gem_name
 rescue LoadError
-  lib = File.expand_path('../lib', __dir__).freeze
+  lib = File.join(gem_root, 'lib').freeze
   file = File.join lib, "#{gem_name}.rb"
   $LOAD_PATH.unshift lib if File.file?(file) && !$LOAD_PATH.include?(lib)
   require gem_name
@@ -56,6 +57,7 @@ $stdout.sync = true
 $stderr.sync = true
 
 main = Diversipub::Main.new(
+  gem_root: gem_root,
   pwd: Pathname.pwd,
   program_name: $PROGRAM_NAME,
   argv: ARGV,

lib/diversipub/main.rb

@@ -5,15 +5,18 @@ module Diversipub
   # The whole application runner.
   #
   class Main
-    attr_reader :pwd, :program_name, :argv, :env, :stdin, :stdout, :stderr
+    attr_reader :gem_root, :pwd, :program_name, :argv, :env,
+                :stdin, :stdout, :stderr
 
-    def initialize(pwd:,
+    def initialize(gem_root:,
+                   pwd:,
                    program_name:,
                    argv:,
                    env:,
                    stdin:,
                    stdout:,
                    stderr:)
+      self.gem_root = gem_root
       self.pwd = pwd
       self.program_name = program_name
       self.argv = argv
@@ -25,6 +28,7 @@ module Diversipub
     end
 
     def run
+      p gem_root
       p pwd
       p program_name
       p argv
@@ -51,6 +55,10 @@ module Diversipub
 
     attr_writer :stdin, :stdout, :stderr
 
+    def gem_root=(gem_root)
+      @gem_root = Pathname.new(gem_root).freeze
+    end
+
     def pwd=(pwd)
       @pwd = Pathname.new(pwd).freeze
     end