Abort on packaging errors

README.md

@@ -133,6 +133,7 @@ The plugin configurations are simple:
 | useDocker          | Boolean indicating whether to package pip dependencies using Docker. Set this to true if your project uses platform-specific compiled libraries like numpy. Requires a [Docker installation](https://www.docker.com/get-docker).                        | Yes. Defaults to `false`                                   |
 | dockerImage        | The Docker image to use to compile functions if `useDocker` is set to `true`. Must be specified as `repository:tag`. If the image doesn't exist on the system, it will be downloaded. The initial download may take some time.                            | Yes. Defaults to `lambci/lambda:build-${provider.runtime}` |
 | containerName      | The desired name for the Docker container.                                                                                                                                                                         | Yes. Defaults to `serverless-package-python-functions`     |
+| abortOnPackagingErrors | Boolean indicating whether you want to stop deployment when packaging errors are detected. Examples of scenarios that will cause packaging errors include: `useDocker` is enabled but the Docker service is not running, pip finds dependency mismatches, virtual environment errrors, etc.. When an error is detected, this will prompt via commandline to continue or abort deploy. | Yes. Defaults to `false` |
 
 At the function level, you:
 - Specify `name` to give your function a name. The plugin uses the function's name as the name of the zip artifact

index.js

@@ -7,6 +7,7 @@ const Path = require('path');
 const ChildProcess = require('child_process');
 const zipper = require('zip-local');
 const upath = require('upath');
+const readlineSync = require('readline-sync');
 
 BbPromise.promisifyAll(Fse);
 
@@ -32,6 +33,7 @@ class PkgPyFuncs {
     this.dockerImage = config.dockerImage || `lambci/lambda:build-${this.serverless.service.provider.runtime}`
     this.containerName = config.containerName || 'serverless-package-python-functions'
     this.mountSSH = config.mountSSH || false
+    this.abortOnPackagingErrors = config.abortOnPackagingErrors || false
     this.dockerServicePath = '/var/task'
   }
 
@@ -89,7 +91,7 @@ class PkgPyFuncs {
     }
 
     let cmd = 'pip'
-    let args = ['install','--upgrade','-t', upath.normalize(buildPath), '-r']
+    let args = ['install', '--upgrade', '-t', upath.normalize(buildPath), '-r']
     if ( this.useDocker === true ){
       cmd = 'docker'
       args = ['exec', this.containerName, 'pip', ...args]
@@ -111,14 +113,48 @@ class PkgPyFuncs {
       throw new this.serverless.classes.Error(`[serverless-package-python-functions] ${ret.error.message}`)
     }
 
+    const out = ret.stdout.toString()
+
     if (ret.stderr.length != 0){
-      this.log(ret.stderr.toString())
+      const errorText = ret.stderr.toString().trim()
+      this.log(errorText) // prints stderr
+
+      if (this.abortOnPackagingErrors){
+        const countErrorNewLines = errorText.split('\n').length
+
+        if(countErrorNewLines < 2 && errorText.toLowerCase().includes('git clone')){
+          // Ignore false positive due to pip git clone printing to stderr
+        } else if(errorText.toLowerCase().includes('docker')){
+          console.log('stdout:', out)
+          this.error("Docker Error Detected")
+
+        } else {
+          // Error is not false positive, 
+          console.log('___ERROR DETECTED, BEGIN STDOUT____\n', out)
+          this.requestUserConfirmation()
+        }
+      }
+
     }
 
-    const out = ret.stdout.toString()
     return out
   }
 
+  requestUserConfirmation(prompt="\n\n??? Do you wish to continue deployment with the stated errors? \n",
+                          yesText="Continuing Deployment!",
+                          noText='ABORTING DEPLOYMENT'
+                          ){
+    const response = readlineSync.question(prompt);
+    if(response.toLowerCase().includes('y')) {
+      console.log(yesText);
+      return
+    } else {
+      console.log(noText)
+      this.error('Aborting')
+      return
+    }
+  }
+
   setupContainer(){
     let out = this.runProcess('docker',['ps', '-a', '--filter',`name=${this.containerName}`,'--format','{{.Names}}'])
     out = out.replace(/^\s+|\s+$/g, '')

package.json

@@ -11,6 +11,7 @@
     "fs-extra": "^3.0.0",
     "lodash": "^4.17.11",
     "upath": "^1.1.0",
+    "readline-sync": "^1.4.10",
     "zip-local": "^0.3.4"
   },
   "repository": {