Adds a dockerBuildCmdExtraArgs option for adding arbitrary arguments to the Docker build step.

Author: ChiliJohnson

index.js

@@ -48,6 +48,7 @@ class ServerlessPythonRequirements {
         dockerImage: null,
         dockerFile: null,
         dockerEnv: false,
+        dockerBuildCmdExtraArgs: [],
         dockerRunCmdExtraArgs: [],
         useStaticCache: false,
         useDownloadCache: false,

lib/docker.js

@@ -25,11 +25,21 @@ function dockerCommand(options) {
 /**
  * Build the custom Docker image
  * @param {string} dockerFile
+ * @param {string[]} extraArgs
  * @return {string} The name of the built docker image.
  */
-function buildImage(dockerFile) {
+function buildImage(dockerFile, extraArgs) {
   const imageName = 'sls-py-reqs-custom';
-  const options = ['build', '-f', dockerFile, '-t', imageName, '.'];
+  const options = ['build', '-f', dockerFile, '-t', imageName];
+
+  if (Array.isArray(extraArgs)) {
+    options.push(...extraArgs);
+  } else {
+    throw new Error('dockerRunCmdExtraArgs option must be an array');
+  }
+
+  options.push('.');
+
   dockerCommand(options);
   return imageName;
 }

lib/pip.js

@@ -180,7 +180,7 @@ function installRequirements(targetFolder, serverless, options) {
       serverless.cli.log(
         `Building custom docker image from ${options.dockerFile}...`
       );
-      dockerImage = buildImage(options.dockerFile);
+      dockerImage = buildImage(options.dockerFile, options.dockerBuildCmdExtraArgs);
     } else {
       dockerImage = options.dockerImage;
     }