Stop clobbering package.json

Author: David Heinemeier Hansson

lib/install/esbuild/install.rb

@@ -1,3 +1,6 @@
 say "Create default package.json and install esbuild"
 copy_file "#{__dir__}/package.json", "package.json"
 run "yarn add esbuild"
+
+say "Add build script"
+run %(npm set-script build "esbuild app/javascript/*.* --bundle --outdir=app/assets/builds")

lib/install/esbuild/package.json

@@ -21,3 +21,8 @@
   empty_directory app_js_entrypoint_path.parent.to_s
   copy_file "#{__dir__}/application.js", app_js_entrypoint_path
 end
+
+unless Rails.root.join("package.json").exist?
+  say "Add default package.json"
+  copy_file "#{__dir__}/package.json", "package.json"
+end

lib/install/install.rb

@@ -0,0 +1,4 @@
+{
+  "name": "app",
+  "private": "true"
+}

lib/install/package.json

@@ -2,3 +2,6 @@
 copy_file "#{__dir__}/package.json", "package.json"
 copy_file "#{__dir__}/rollup.config.js", "rollup.config.js"
 run "yarn add rollup @rollup/plugin-node-resolve"
+
+say "Add build script"
+run %(npm set-script build "rollup -c rollup.config.js")

lib/install/rollup/install.rb

@@ -2,3 +2,6 @@
 copy_file "#{__dir__}/package.json", "package.json"
 copy_file "#{__dir__}/webpack.config.js", "webpack.config.js"
 run "yarn add webpack webpack-cli"
+
+say "Add build script"
+run %(npm set-script build "webpack --config webpack.config.js")