Do not generate pidfile in production environments (#50644)

* Remove pidfile in production

* Update changelog

* Update activestorage/test/dummy/config/puma.rb

Co-authored-by: Rafael Mendonça França <rafael@franca.dev>

* Update template and other dummy files

---------

Co-authored-by: Rafael Mendonça França <rafael@franca.dev>

actionmailbox/test/dummy/config/puma.rb

@@ -28,7 +28,11 @@ port ENV.fetch("PORT") { 3000 }
 environment ENV.fetch("RAILS_ENV") { "development" }
 
 # Specifies the `pidfile` that Puma will use.
-pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
+if ENV["PIDFILE"]
+  pidfile ENV["PIDFILE"]
+else
+  pidfile "tmp/pids/server.pid" if ENV.fetch("RAILS_ENV", "development") == "development"
+end
 
 # Allow puma to be restarted by `bin/rails restart` command.
 plugin :tmp_restart

actiontext/test/dummy/config/puma.rb

@@ -28,7 +28,11 @@ port ENV.fetch("PORT") { 3000 }
 environment ENV.fetch("RAILS_ENV") { "development" }
 
 # Specifies the `pidfile` that Puma will use.
-pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
+if ENV["PIDFILE"]
+  pidfile ENV["PIDFILE"]
+else
+  pidfile "tmp/pids/server.pid" if ENV.fetch("RAILS_ENV", "development") == "development"
+end
 
 # Allow puma to be restarted by `bin/rails restart` command.
 plugin :tmp_restart

activestorage/test/dummy/config/puma.rb

@@ -28,7 +28,11 @@ port ENV.fetch("PORT") { 3000 }
 environment ENV.fetch("RAILS_ENV") { "development" }
 
 # Specifies the `pidfile` that Puma will use.
-pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
+if ENV["PIDFILE"]
+  pidfile ENV["PIDFILE"]
+else
+  pidfile tmp/pids/server.pid" if ENV.fetch("RAILS_ENV", "development") == "development"
+end
 
 # Allow puma to be restarted by `bin/rails restart` command.
 plugin :tmp_restart

railties/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Disable `pidfile` generation in production environment.
+
+    *Hans Schnedlitz*
+
 *   Set `config.action_view.annotate_rendered_view_with_filenames` to `true` in the
     development environment.
 

railties/lib/rails/commands/server/server_command.rb

@@ -114,7 +114,7 @@ module Rails
       class_option :using, aliases: "-u", type: :string,
         desc: "Specify the Rack server used to run the application (thin/puma/webrick).", banner: :name
       class_option :pid, aliases: "-P", type: :string,
-        desc: "Specify the PID file - defaults to #{DEFAULT_PIDFILE}."
+        desc: "Specify the PID file. Defaults to #{DEFAULT_PIDFILE} in development."
       class_option :dev_caching, aliases: "-C", type: :boolean, default: nil,
         desc: "Specify whether to perform caching in development."
       class_option :restart, type: :boolean, default: nil, hide: true
@@ -243,11 +243,13 @@ module Rails
         end
 
         def pid
-          File.expand_path(options[:pid] || ENV.fetch("PIDFILE", DEFAULT_PIDFILE))
+          default_pidfile = environment == "development" ? DEFAULT_PIDFILE : nil
+          pid = options[:pid] || ENV["PIDFILE"] || default_pidfile
+          File.expand_path(pid) if pid
         end
 
         def prepare_restart
-          FileUtils.rm_f(pid) if options[:restart]
+          FileUtils.rm_f(pid) if pid && options[:restart]
         end
 
         def rack_server_suggestion(server)

railties/lib/rails/generators/rails/app/templates/config/puma.rb.tt

@@ -29,7 +29,11 @@ port ENV.fetch("PORT") { 3000 }
 environment ENV.fetch("RAILS_ENV") { "development" }
 
 # Specifies the `pidfile` that Puma will use.
-pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
+if ENV["PIDFILE"]
+  pidfile ENV["PIDFILE"]
+else
+  pidfile "tmp/pids/server.pid" if ENV.fetch("RAILS_ENV", "development") == "development"
+end
 
 # Allow puma to be restarted by `bin/rails restart` command.
 plugin :tmp_restart