Support packaging functions individually

src/index.ts

@@ -149,7 +149,7 @@ export class TypeScriptPlugin {
       await this.linkOrCopy(path.resolve('package.json'), outPkgPath, 'file')
     }
 
-    // include any "extras" from the "include" section
+    // include any "extras" from the "include" section of the main service
     if (this.serverless.service.package.include && this.serverless.service.package.include.length > 0) {
       const files = await globby(this.serverless.service.package.include)
 
@@ -166,6 +166,25 @@ export class TypeScriptPlugin {
         }
       }
     }
+
+    // include any "extras" from the "include" section of each function
+    for (const fnName in this.functions) {
+      const fn = this.functions[fnName]
+      if (fn.package.include !== undefined) {
+        for (const filename of fn.package.include) {
+          const destFileName = path.resolve(path.join(buildFolder, filename))
+          const dirname = path.dirname(destFileName)
+
+          if (!fs.existsSync(dirname)) {
+            fs.mkdirpSync(dirname)
+          }
+
+          if (!fs.existsSync(destFileName)) {
+            fs.copySync(path.resolve(filename), path.resolve(path.join(buildFolder, filename)))
+          }
+        }
+      }
+    }
   }
 
   async moveArtifacts(): Promise<void> {
@@ -202,6 +221,18 @@ export class TypeScriptPlugin {
       serverlessFolder,
       path.basename(this.serverless.service.package.artifact)
     )
+
+    this.serverless.service.getAllFunctions().forEach(name => {
+      if (this.serverless.service.functions[name].package.artifact) {
+        this.serverless.service.functions[name].package.artifact = path.join(
+          this.originalServicePath,
+          serverlessFolder,
+          path.basename(
+            this.serverless.service.functions[name].package.artifact
+          )
+        )
+      }
+    })
   }
 
   async cleanup(): Promise<void> {