Create mrsc.rb

Author: z0ny

mrsc.rb

@@ -0,0 +1,111 @@
+# Helper script for creating examples used in https://tech.showmax.com/2023/01/backend-developer-guide/ blog post.
+#
+# Usage:
+#   ruby mrsc.rb <action>
+#
+# Available actions are init, example1, example2
+#
+require 'securerandom'
+
+def edit(f, r = 5, a: true)
+  File.open(f, a ? 'a' : 'w') do |file|
+    (rand(r) + 1).times do
+      file.puts SecureRandom.alphanumeric(rand(16) + 1)
+    end
+  end
+end
+
+def mkdir(p)
+  Dir.mkdir(p) unless Dir.exist?(p)
+end
+
+def del(f)
+  File.delete(f) if File.exist?(f)
+end
+
+def init
+  mkdir('services')
+  Dir.chdir('services') do
+    3.times do |n|
+      service = "service#{n}"
+      mkdir(service)
+      Dir.chdir(service) do
+        mkdir('app')
+
+        edit('service_file1.rb')
+        Dir.chdir('app') do
+          edit('app_file1.rb')
+        end
+      end
+    end
+  end
+
+  mkdir('gems')
+  Dir.chdir('gems') do
+    mkdir('gem1')
+    Dir.chdir('gem1') do
+      edit('gem_file1.rb')
+    end
+  end
+end
+
+def example1
+  Dir.chdir('services/service0') do
+    Dir.chdir('app') do
+      edit('app_file1.rb', a: false)
+      edit('app_file2.rb')
+    end
+  end
+  Dir.chdir('services/service2') do
+    Dir.chdir('app') do
+      edit('app_file2.rb')
+    end
+  end
+end
+
+def example2
+  Dir.chdir('services') do
+    3.times do |n|
+      Dir.chdir("service#{n}") do
+        case n
+          when 0
+            Dir.chdir('app') do
+              edit('app_file1.rb', 50)
+              edit('app_file3.rb', 50)
+              del('app_file2.rb')
+            end
+          when 1
+            Dir.chdir('app') do
+              edit('app_file1.rb', a: false)
+            end
+          when 2
+            Dir.chdir('app') do
+              edit('app_file1.rb', 1)
+              edit('app_file2.rb', 50)
+            end
+
+            mkdir('lib')
+            Dir.chdir('lib') do
+              edit('lib_file1.rb', 50)
+            end
+
+            edit('service_file1.rb')
+        end
+      end
+    end
+  end
+  Dir.chdir('gems/gem1') do
+    edit('gem_file1.rb')
+  end
+end
+
+case ARGV[0]
+  when 'init'
+    init
+  when 'example1'
+    example1
+  when 'example2'
+    example2
+  else
+    puts 'Missing command (init, example1, example2)'
+end