Merge pull request #98 from UnitedIncome/symlink

deal with reqs being a symlink in docker

Author: dschep

lib/pip.js

@@ -7,9 +7,10 @@ const {spawnSync} = require('child_process');
  * @return {Promise}
  */
 function installRequirements() {
+  const dotSlsReqs = '.serverless/requirements.txt';
   let fileName = this.options.fileName;
   if (this.options.usePipenv && fse.existsSync(path.join(this.servicePath, 'Pipfile'))) {
-    fileName = '.serverless/requirements.txt';
+    fileName = dotSlsReqs;
   }
 
   if (!fse.existsSync(path.join(this.servicePath, fileName)))
@@ -38,6 +39,11 @@ function installRequirements() {
       pipCmd.push('--system');
   }
   if (this.options.dockerizePip) {
+    // In case the requirements file is a symlink, copy it to .serverless/requirements.txt
+    if (fileName !== dotSlsReqs) {
+      fse.copySync(fileName, dotSlsReqs);
+      fileName = dotSlsReqs;
+    }
     cmd = 'docker';
 
     this.serverless.cli.log(`Docker Image: ${this.options.dockerImage}`);