Adds option to leave python libraries out of the deployment on a line-by-line basis by adding a #no-deploy comment beside it in requirements.txt. Creates a parsed .requirements.txt file and retargets pip install to that file.

Author: Jon Medwig

index.js

@@ -39,13 +39,40 @@ class ServerlessPythonRequirements {
     }
   };
 
+  /**
+   * parse requirements.txt into .requirements.txt, leaving out #no-deploy lines
+   * @return true
+   */
+  parseRequirements() {
+    if (!fse.existsSync(path.join(this.serverless.config.servicePath,
+                                  'requirements.txt'))) {
+      return BbPromise.resolve();
+    }
+
+    this.serverless.cli.log(
+      `Parsing Python requirements.txt`);
+
+    var fs = require('fs');
+    var reqs = fs.readFileSync("requirements.txt").toString().split('\n');
+
+    var newReqs = ''
+    for (var i in reqs) {
+      if(reqs[i].indexOf('#no-deploy') == -1) {
+        newReqs += reqs[i] + '\n'
+      }
+    }
+    fs.writeFileSync(".requirements.txt", newReqs, 'utf8');
+
+    return true
+  };
+
   /**
    * pip install the requirements to the .requirements directory
    * @return {Promise}
    */
   installRequirements() {
     if (!fse.existsSync(path.join(this.serverless.config.servicePath,
-                                  'requirements.txt'))) {
+                                  '.requirements.txt'))) {
       return BbPromise.resolve();
     }
 
@@ -58,7 +85,7 @@ class ServerlessPythonRequirements {
       let options;
       const pipCmd = [
         runtime, '-m', 'pip', '--isolated', 'install',
-        '-t', '.requirements', '-r', 'requirements.txt',
+        '-t', '.requirements', '-r', '.requirements.txt',
       ];
       if (!this.custom().dockerizePip) {
         const pipTestRes = spawnSync(runtime, ['-m', 'pip', 'help', 'install']);
@@ -204,6 +231,7 @@ class ServerlessPythonRequirements {
 
     let before = () => BbPromise.bind(this)
         .then(this.addVendorHelper)
+        .then(this.parseRequirements)
         .then(this.packRequirements)
         .then(this.linkRequirements);
 
@@ -218,6 +246,7 @@ class ServerlessPythonRequirements {
       'after:deploy:function:packageFunction': after,
       'requirements:install:install': () => BbPromise.bind(this)
         .then(this.addVendorHelper)
+        .then(this.parseRequirements)
         .then(this.packRequirements),
       'requirements:clean:clean': () => BbPromise.bind(this)
         .then(this.cleanup)