Explicitly activate plugins via site.json

SiteGenerator/Sources/SiteGenerator/Feeds/JSONFeedPlugin.swift

@@ -21,6 +21,15 @@ final class JSONFeedPlugin: Plugin {
 
     // MARK: - Plugin methods
 
+    convenience init(options: [String: Any]) {
+        if let feedPath = options["feed_path"] as? String {
+            self.init(jsonFeedWriter: JSONFeedWriter(feedPath: feedPath))
+        }
+        else {
+            self.init()
+        }
+    }
+
     func setUp(site: Site, sourceURL: URL) throws {
         guard postRepo.postDataExists(at: sourceURL) else {
             return

SiteGenerator/Sources/SiteGenerator/Feeds/RSSFeedPlugin.swift

@@ -21,6 +21,15 @@ final class RSSFeedPlugin: Plugin {
 
     // MARK: - Plugin methods
 
+    convenience init(options: [String: Any]) {
+        if let feedPath = options["feed_path"] as? String {
+            self.init(rssFeedWriter: RSSFeedWriter(feedPath: feedPath))
+        }
+        else {
+            self.init()
+        }
+    }
+
     func setUp(site: Site, sourceURL: URL) throws {
         guard postRepo.postDataExists(at: sourceURL) else {
             return

SiteGenerator/Sources/SiteGenerator/Generator/Generator.swift

@@ -15,12 +15,12 @@ public final class Generator {
     // Site properties
     let site: Site
     let sourceURL: URL
-    let plugins: [Plugin]
+    var plugins: [Plugin] = []
     let renderers: [Renderer]
 
     let ignoredFilenames = [".DS_Store", ".gitkeep"]
 
-    public init(sourceURL: URL, plugins: [Plugin], renderers: [Renderer]) throws {
+    public init(sourceURL: URL, renderers: [Renderer]) throws {
         let siteURL = sourceURL.appendingPathComponent("site.json")
         let site = try Site.decode(from: siteURL)
 
@@ -29,9 +29,24 @@ public final class Generator {
 
         self.site = site
         self.sourceURL = sourceURL
-        self.plugins = plugins
         self.renderers = renderers
 
+        try initializePlugins()
+    }
+
+    private func initializePlugins() throws {
+        plugins = site.plugins.map { (sitePlugin, options) in
+            switch sitePlugin {
+            case .projects:
+                return ProjectsPlugin(options: options)
+            case .posts:
+                return PostsPlugin(options: options)
+            case .jsonFeed:
+                return JSONFeedPlugin(options: options)
+            case .rssFeed:
+                return RSSFeedPlugin(options: options)
+            }
+        }
         for plugin in plugins {
             try plugin.setUp(site: site, sourceURL: sourceURL)
         }

SiteGenerator/Sources/SiteGenerator/Generator/HumanSite.swift

@@ -20,6 +20,7 @@ struct HumanSite: Codable {
     let avatar: String?
     let icon: String?
     let favicon: String?
+    let plugins: [String: [String: String]]?
 }
 
 extension Site {
@@ -35,7 +36,15 @@ extension Site {
             scripts: humanSite.scripts ?? [],
             avatarPath: humanSite.avatar,
             iconPath: humanSite.icon,
-            faviconPath: humanSite.favicon
+            faviconPath: humanSite.favicon,
+            plugins: (humanSite.plugins ?? [:]).reduce(into: [:], { dict, pair in
+                let (name, options) = pair
+                guard let sitePlugin = SitePlugin(rawValue: name) else {
+                    print("warning: unknown site plugin \"\(name)\"")
+                    return
+                }
+                dict[sitePlugin] = options
+            })
         )
     }
 }

SiteGenerator/Sources/SiteGenerator/Generator/Plugin.swift

@@ -8,6 +8,8 @@
 import Foundation
 
 public protocol Plugin {
+    init(options: [String: Any])
+
     func setUp(site: Site, sourceURL: URL) throws
 
     func render(site: Site, targetURL: URL, templateRenderer: TemplateRenderer) throws

SiteGenerator/Sources/SiteGenerator/Generator/Site.swift

@@ -21,6 +21,8 @@ public struct Site {
     public let avatarPath: String?
     public let iconPath: String?
     public let faviconPath: String?
+
+    public let plugins: [SitePlugin: [String: Any]]
 }
 
 extension Site {

SiteGenerator/Sources/SiteGenerator/Generator/SitePlugin.swift

@@ -0,0 +1,15 @@
+//
+//  SitePlugin.swift
+//  SiteGenerator
+//
+//  Created by Sami Samhuri on 2019-12-10.
+//
+
+import Foundation
+
+public enum SitePlugin: String, Codable {
+    case posts
+    case projects
+    case jsonFeed = "json_feed"
+    case rssFeed = "rss_feed"
+}

SiteGenerator/Sources/SiteGenerator/Posts/PostsPlugin.swift

@@ -21,6 +21,15 @@ final class PostsPlugin: Plugin {
 
     // MARK: - Plugin methods
 
+    convenience init(options: [String: Any]) {
+        if let outputPath = options["path"] as? String {
+            self.init(postWriter: PostWriter(outputPath: outputPath))
+        }
+        else {
+            self.init()
+        }
+    }
+
     func setUp(site: Site, sourceURL: URL) throws {
         guard postRepo.postDataExists(at: sourceURL) else {
             return

SiteGenerator/Sources/SiteGenerator/Projects/ProjectsPlugin.swift

@@ -28,6 +28,15 @@ final class ProjectsPlugin: Plugin {
         self.outputPath = outputPath
     }
 
+    convenience init(options: [String: Any]) {
+        if let outputPath = options["path"] as? String {
+            self.init(outputPath: outputPath)
+        }
+        else {
+            self.init()
+        }
+    }
+
     func setUp(site: Site, sourceURL: URL) throws {
         self.sourceURL = sourceURL
         let projectsURL = sourceURL.appendingPathComponent("projects.json")

Tests/test-posts/in/site.json

@@ -1,5 +1,8 @@
 {
   "author": "Hunter S. Thompson",
   "title": "gonzo journalism",
-  "url": "http://example.net"
+  "url": "http://example.net",
+  "plugins": {
+    "posts": {}
+  }
 }

Tests/test-projects/in/site.json

@@ -1,5 +1,8 @@
 {
   "author": "Linus Torvalds",
   "title": "Nvidia, fuck you!",
-  "url": "http://example.net"
+  "url": "http://example.net",
+  "plugins": {
+    "projects": {}
+  }
 }

site.json

@@ -12,4 +12,11 @@
   "icon": "images/apple-touch-icon-300.png",
   "favicon": "images/apple-touch-icon-80.png",
   "avatar": "images/me.jpg",
+  "plugins": {
+    "projects": {},
+    "posts": {
+      "json_feed": "feed.json",
+      "rss_feed": "feed.xml"
+    }
+  }
 }