Refactor and tidy up

Author: eoinkelly

bin/build

@@ -2,8 +2,9 @@
 
 require "fileutils"
 require "yaml"
-require_relative "./lib/config"
-require_relative "./lib/builder"
+require_relative "lib/build_config"
+require_relative "lib/builder"
+require_relative "lib/terminal"
 
 # Usage:
 #
@@ -19,13 +20,23 @@ require_relative "./lib/builder"
 #   $ ./build default       # build using the default config
 #   $ ./build basic         # build using the basic CI config
 #   $ ./build react         # build using the React CI config
+#
+# You can capture the output to a file using the `tee` command:
+#
+#   $ ./build all_variants | tee build.log
+#
+# If you want to capture the output to a file and keep the color output, you can
+# use the `unbuffer` command:
+#
+#   $ brew install expect # or your linux distro equivalent
+#   $ unbuffer ./build all_variants | tee build.log
 
 class Main
   class << self
     def main
-      configs = Config.resolve_to_configs(ARGV.first)
+      configs = BuildConfig.resolve_to_configs(ARGV.first)
 
-      puts configs_summary(configs)
+      Terminal.puts_header(configs_summary(configs))
 
       configs.each do |config|
         Builder.new(config:).build

bin/compare

@@ -0,0 +1,20 @@
+#!/usr/bin/env ruby
+
+require_relative "lib/comparison_config"
+require_relative "lib/terminal"
+
+class Main
+  class << self
+    def main(dry_run:)
+      Dir.chdir(ComparisonConfig.comparison_repo_root_path) do
+        ComparisonConfig.comparison_builds.each do |build_name|
+          Terminal.puts_header("Creating PR for #{build_name}")
+          cmd = "gh pr create --title 'Compare #{build_name} against vanilla Rails' --body 'Compare #{build_name} against vanilla Rails' --base main --head #{build_name} #{dry_run ? "--dry-run" : ""}"
+          system(cmd)
+        end
+      end
+    end
+  end
+end
+
+Main.main(dry_run: ARGV.include?("--dry-run"))

bin/create_comarison_repo_prs

@@ -0,0 +1,87 @@
+#!/usr/bin/env ruby
+
+require "fileutils"
+require_relative "lib/comparison_config"
+require_relative "lib/terminal"
+
+class Main
+  class << self
+    def main
+      reset_comparison_repo
+      use_vanilla_rails_as_main_branch
+
+      ComparisonConfig.comparison_builds.each do |build_name|
+        populate_new_branch_for_build(build_name:)
+        checkout_main
+      end
+    end
+
+    private
+
+    def reset_comparison_repo
+      repo_path = ComparisonConfig.comparison_repo_root_path
+
+      FileUtils.rm_rf(repo_path)
+      FileUtils.mkdir_p(repo_path)
+
+      Dir.chdir(repo_path) do
+        system("git init")
+        system("git remote add origin git@github.com:ackama/rails-template-variants-comparison.git")
+      end
+    end
+
+    def use_vanilla_rails_as_main_branch
+      Terminal.puts_header("Adding vanilla Rails build to main branch")
+      copy_build(build_path: ComparisonConfig.vanilla_build_path)
+      commit_changes(commit_message: "Add #{ComparisonConfig.vanilla_build_name}")
+    end
+
+    def populate_new_branch_for_build(build_name:)
+      Terminal.puts_header("Creating branch for #{build_name}")
+
+      rm_rf_except_git_dir
+      create_new_branch(branch_name: build_name)
+
+      build_path = File.join(ComparisonConfig.build_path, build_name)
+      copy_build(build_path:)
+
+      commit_changes(commit_message: "Add #{build_name}")
+    end
+
+    def checkout_main
+      Dir.chdir(ComparisonConfig.comparison_repo_root_path) do
+        system("git checkout main")
+      end
+    end
+
+    # clean out all the files from the previous build (except .git)
+    def rm_rf_except_git_dir
+      Dir.chdir(ComparisonConfig.comparison_repo_root_path) do
+        keepers = [".git", "."]
+        deletable_files = Dir.glob("{*,.*}").reject { |f| keepers.include?(f) }
+
+        FileUtils.rm_rf(deletable_files)
+      end
+    end
+
+    def create_new_branch(branch_name:)
+      Dir.chdir(ComparisonConfig.comparison_repo_root_path) do
+        system("git checkout -b #{branch_name}")
+      end
+    end
+
+    def commit_changes(commit_message:)
+      Dir.chdir(ComparisonConfig.comparison_repo_root_path) do
+        system("git add .")
+        # skip pre-commit hooks because they're not relevant here
+        system("git commit --quiet --no-verify -m '#{commit_message}'")
+      end
+    end
+
+    def copy_build(build_path:)
+      system("rsync -qav --exclude='.git' --exclude='node_modules' --exclude='tmp' #{build_path}/ #{ComparisonConfig.comparison_repo_root_path}/")
+    end
+  end
+end
+
+Main.main

bin/create_comparison_repo

@@ -1,4 +1,4 @@
-class Config
+class BuildConfig
   PROJECT_ROOT_PATH = File.absolute_path(File.join(__dir__, "../.."))
   CI_CONFIGS_PATH = File.join(PROJECT_ROOT_PATH, "ci/configs")
   BUILD_PATH = File.join(PROJECT_ROOT_PATH, "tmp/builds")

bin/create_prs

@@ -1,25 +1,21 @@
-##
-# Invokes the template as a user would, not as CI does via the build-and-test script.
-# Automatically removes old DB before generating the app if required
-#
+require "rubygems"
+
 class Builder
   def initialize(config:)
     @config = config
+    @rails_cmd_version = build_rails_cmd_version(target_rails_major_minor: config.target_rails_major_minor)
   end
 
   def build
-    verify_rails_cmd_is_expected_version!
-
     Dir.chdir(@config.build_path) do
       delete_any_previous_build
       drop_dbs_from_previous_build
 
-      # TODO: how to handle errors? raise? or log and continue? or rename the app dir with a .failed suffix?
-      # TODO: how to handle output? redirect to a file? or sep files for stdout and stderr?
-
       if @config.vanilla?
+        Terminal.puts_header("Building vanilla Rails app")
         system(build_vanilla_cmd_env, build_vanilla_cmd)
       else
+        Terminal.puts_header("Building Rails app")
         system(build_cmd_env, build_cmd)
       end
     end
@@ -29,20 +25,33 @@ def build
 
   def base_cmd_parts
     [
-      "rails new #{@config.app_name}",
+      "rails _#{@rails_cmd_version}_ new #{@config.app_name}",
       "-d postgresql",
       "--skip-javascript",
       "--skip-kamal",
       "--skip-solid"
     ]
   end
 
-  def verify_rails_cmd_is_expected_version!
-    actual_rails_version = `rails -v`.strip.sub("Rails ", "")
+  def build_rails_cmd_version(target_rails_major_minor:)
+    specs = Gem::Specification.find_all_by_name("rails")
+
+    raise "No versions of gem '#{gem_name}' are installed" if specs.empty?
 
-    return if actual_rails_version.start_with?(@config.target_rails_major_minor)
+    version = specs
+              .map { _1.version.to_s }
+              .sort
+              .reverse
+              .find { |v| v.start_with?(target_rails_major_minor) }
+    test_cmd = "rails _#{version}_ -v"
+    expected_test_output = "Rails #{version}"
+    actual_test_output = `#{test_cmd}`.strip
 
-    raise "Expected Rails version #{@config.target_rails_major_minor}, but got #{actual_rails_version}"
+    raise "Command failed: #{test_cmd}. Actual: #{actual_test_output}" unless expected_test_output == actual_test_output
+
+    Terminal.puts_header("Using Rails version #{version}")
+
+    version
   end
 
   def delete_any_previous_build
@@ -84,17 +93,10 @@ def build_vanilla_cmd
     base_cmd_parts.join(" ")
   end
 
-  def print_separator
-    puts ""
-    puts "*" * 80
-    puts ""
-  end
-
   def drop_dbs_from_previous_build
-    print_separator
+    Terminal.puts_header("Dropping databases from previous build")
     system "psql -c 'DROP DATABASE IF EXISTS #{@config.app_name}_test;'"
     system "psql -c 'DROP DATABASE IF EXISTS #{@config.app_name}_development;'"
     system "psql -c 'DROP DATABASE IF EXISTS #{@config.app_name}_test;'"
-    print_separator
   end
 end

bin/lib/config.rb renamed to bin/lib/build_config.rb

@@ -0,0 +1,30 @@
+class ComparisonConfig
+  PROJECT_ROOT_PATH = File.absolute_path(File.join(__dir__, "../.."))
+  BUILD_PATH = File.join(PROJECT_ROOT_PATH, "tmp/builds")
+
+  class << self
+    def build_path
+      BUILD_PATH
+    end
+
+    def comparison_repo_root_path
+      File.join(PROJECT_ROOT_PATH, "tmp/rails-template-variants-comparison")
+    end
+
+    def vanilla_build_name
+      all_builds.find { |build_name| build_name.start_with?("vanilla_") }
+    end
+
+    def vanilla_build_path
+      File.join(BUILD_PATH, vanilla_build_name)
+    end
+
+    def comparison_builds
+      all_builds - [vanilla_build_name]
+    end
+
+    def all_builds
+      Dir.children(BUILD_PATH)
+    end
+  end
+end

bin/lib/builder.rb

@@ -0,0 +1,12 @@
+class Terminal
+  class << self
+    def puts_header(title)
+      puts <<~EO_HEADER
+
+        #{title}
+        #{"=" * title.length}
+
+      EO_HEADER
+    end
+  end
+end