Fallback for Process.fork not being supported on Windows

lib/hanami/cli/commands/app/assets/command.rb

@@ -11,7 +11,7 @@ module App
         module Assets
           # Base class for assets commands.
           #
-          # Finds slices with assets present (anything in an `assets/` dir), then forks a child
+          # Finds slices with assets present (anything in an `assets/` dir), then forks or spawns a child
           # process for each slice to run the assets command (`config/assets.js`) for the slice.
           #
           # Prefers the slice's own `config/assets.js` if present, otherwise falls back to the
@@ -85,6 +85,13 @@ def fork_child_assets_command(slice)
               Process.fork do
                 cmd, *args = assets_command(slice)
                 system_call.call(cmd, *args, out_prefix: "[#{slice.slice_name}] ")
+              # Handle Process.fork not being implemented on non-POSIX OS's
+              # by only spawning a child process of the main process
+              rescue NotImplementedError
+                Thread.new do
+                  cmd, *args = assets_command(slice)
+                  system_call.call(cmd, *args, out_prefix: "[#{slice.slice_name}] ")
+                end
               rescue Interrupt
                 # When this has been interrupted (by the Signal.trap handler in #call), catch the
                 # interrupt and exit cleanly, without showing the default full backtrace.

lib/hanami/cli/generators/gem/app.rb

@@ -46,6 +46,8 @@ def generate_app(app, context) # rubocop:disable Metrics/AbcSize
             fs.write("bin/dev", file("dev"))
             fs.chmod("bin/dev", 0o755)
 
+            fs.write("bin/dev.bat", file("dev.bat")) if ::Gem.win_platform?
+
             fs.write("config/app.rb", t("app.erb", context))
             fs.write("config/settings.rb", t("settings.erb", context))
             fs.write("config/routes.rb", t("routes.erb", context))

lib/hanami/cli/generators/gem/app/dev.bat

@@ -0,0 +1 @@
+@bash.exe "%~dpn0" %*