merge master

Author: bweigel

README.md

@@ -385,4 +385,4 @@ zipinfo .serverless/xxx.zip
  * [@dee-me-tree-or-love](https://github.com/dee-me-tree-or-love) - the `slim` package option
  * [@alexjurkiewicz](https://github.com/alexjurkiewicz) - [docs about docker workflows](#native-code-dependencies-during-build)
  * [@andrewfarley](https://github.com/andrewfarley) - Implemented download caching and static caching
- * [@bweigel](https://github.com/bweigel) - migrating tests from bats to tape, additional configuration for slim-option
+ * [@bweigel](https://github.com/bweigel) - adding the `slimPatternsAppendDefaults` option & fixing per-function packaging when some functions don't have requirements

lib/pip.js

@@ -381,6 +381,20 @@ function installRequirementsIfNeeded(
   // Our source requirements, under our service path, and our module path (if specified)
   const fileName = path.join(servicePath, modulePath, options.fileName);
 
+  // Skip requirements generation, if requirements file doesn't exist
+  if (options.usePipenv) {
+    if (
+      !fse.existsSync(path.join(servicePath, 'Pipfile')) &&
+      !fse.existsSync(fileName)
+    ) {
+      return false;
+    }
+  } else {
+    if (!fse.existsSync(fileName)) {
+      return false;
+    }
+  }
+
   // First, generate the requirements file to our local .serverless folder
   fse.ensureDirSync(path.join(servicePath, '.serverless'));
   const slsReqsTxt = path.join(servicePath, '.serverless', 'requirements.txt');