Load deserializers from files specified in package.json

spec/fixtures/packages/package-with-deserializers/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "package-with-deserializers",
+  "version": "1.0.0",
+  "atom-deserializers": {
+    "TheDeserializerName": "./the-deserializer.js"
+  }
+}

spec/fixtures/packages/package-with-deserializers/the-deserializer.js

@@ -0,0 +1,6 @@
+module.exports = function (state) {
+  return {
+    wasDeserializedBy: 'TheDeserializer',
+    state: state
+  }
+}

spec/package-manager-spec.coffee

@@ -79,6 +79,16 @@ describe "PackageManager", ->
 
       expect(loadedPackage.name).toBe "package-with-main"
 
+    it "registers any deserializers specified in the package's package.json", ->
+      atom.packages.loadPackage("package-with-deserializers")
+
+      state = {deserializer: 'TheDeserializerName', a: 'b'}
+
+      expect(atom.deserializers.deserialize(state)).toEqual {
+        wasDeserializedBy: 'TheDeserializer'
+        state: state
+      }
+
   describe "::unloadPackage(name)", ->
     describe "when the package is active", ->
       it "throws an error", ->

src/package.coffee

@@ -84,6 +84,7 @@ class Package
         @loadKeymaps()
         @loadMenus()
         @loadStylesheets()
+        @loadDeserializers()
         @settingsPromise = @loadSettings()
         @requireMainModule() unless @mainModule? or @activationShouldBeDeferred()
       catch error
@@ -253,6 +254,12 @@ class Package
     @stylesheets = @getStylesheetPaths().map (stylesheetPath) =>
       [stylesheetPath, @themeManager.loadStylesheet(stylesheetPath, true)]
 
+  loadDeserializers: ->
+    for name, implementationPath of @metadata['atom-deserializers']
+      deserialize = require(path.join(@path, implementationPath))
+      atom.deserializers.add({name, deserialize})
+    return
+
   getStylesheetsPath: ->
     path.join(@path, 'styles')