shopify-extensions version

The version is now stored in a plain text file instead of being part of
the Ruby code. This makes updating the contents a little easier.

Rakefile

@@ -116,10 +116,7 @@ namespace :extensions do
   task :update do
     version = ENV.fetch("VERSION").strip
     error("Invalid version") unless /^v\d+\.\d+\.\d+/.match(version)
-    extconf = Paths.extension("extconf.rb")
-    File.open(extconf) do |f|
-      IO.write(extconf, f.read.gsub(/(?<=version: ")(.*?)(?=")/, version))
-    end
+    File.write(Paths.extension("version"), version)
   end
 
   task :symlink do
@@ -134,10 +131,7 @@ namespace :extensions do
     target = Paths.extension("shopify-extensions")
     require_relative Paths.extension("shopify_extensions.rb")
     File.delete(target) if File.exist?(target)
-    ShopifyExtensions.install(
-      version: "v0.1.0",
-      target: target
-    )
+    ShopifyExtensions.install(target: target)
   end
 
   module Paths

ext/shopify-extensions/extconf.rb

@@ -10,7 +10,6 @@
 
 begin
   ShopifyExtensions.install(
-    version: "v0.1.0",
     target: File.join(File.dirname(__FILE__), "shopify-extensions")
   )
 rescue ShopifyExtensions::InstallationError => error

ext/shopify-extensions/shopify_extensions.rb

@@ -13,7 +13,11 @@ def self.call(platform: Platform.new, **args)
       new.call(platform: platform, **args)
     end
 
-    def call(platform:, version:, target:)
+    def self.version
+      File.read(File.expand_path("../version", __FILE__)).strip
+    end
+
+    def call(platform:, version: self.class.version, target:)
       target = platform.format_path(target.to_s)
 
       asset = Asset.new(

ext/shopify-extensions/version

@@ -0,0 +1 @@
+v0.1.0