Add option to generate empty md files

WebsiteGenerator/Files/Configuration.swift

@@ -1,15 +1,54 @@
 import Foundation
 
+/**
+ The global configuration of the website.
+ */
 struct Configuration: Codable {
 
+    /**
+     The width of page content in pixels.
+
+     The width specification is used to scale images to the correct width,
+     when images are included in markdown content using the syntax
+     `![](image.jpg)`.
+     - Note: A high-resolution `@2x` version will be generated as well.
+     */
     let pageImageWidth: Int
 
+    /**
+     Automatically minify all `.css` and `.js` resources which are copied
+     to the output folder.
+     - Note: This option requires the `uglifyjs` and `clean-css` tools,
+     which can be installed using the `install.sh` script in the root folder of the generator.
+     */
     let minifyCSSandJS: Bool
 
+    /**
+     The path to the directory where the root element metadata is located.
+     */
     let contentPath: String
 
+    /**
+     The path where the generated website should be written.
+     */
     let outputPath: String
 
+    /**
+     Create .md files for content pages, if they don't exist.
+
+     After the languages of the root element are read, the generator looks
+     for localized `.md` files for each page element which has metadata.
+     If it can't find a content file, it generates a placeholder.
+
+     Setting this option to `true` will cause the generator to create empty `.md`
+     files for each root level language. This can be helpful to see which content still needs
+     to be written. There is then also no need to manually create these files.
+
+     - Note: Empty content files will continue to be ignored by the generator,
+     and treated as if they are not present.
+     */
+    let createMdFilesIfMissing: Bool
+
     var contentDirectory: URL {
         .init(fileURLWithPath: contentPath)
     }

config_example.json

@@ -1,6 +1,7 @@
 {
     "pageImageWidth" : 748,
     "minifyCSSandJS" : true,
+    "createMdFilesIfMissing" : false,
     "contentPath" : "/path/to/content/folder",
     "outputPath" : "/path/to/output/folder")
 }