Replace Python clone script with a Bash script

Eliminates the need for a virtualenv.

Author: Renzo Lucioni

Makefile

@@ -5,7 +5,7 @@ help: ## Display this help message
 	@perl -nle'print $& if m{^[\.a-zA-Z_-]+:.*?## .*$$}' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m  %-25s\033[0m %s\n", $$1, $$2}'
 
 clone: ## Clone service repos
-	./clone.py
+	./clone.sh
 
 # TODO Print out help for this target. Even better if we can iterate over the services in docker-compose.yml, and
 # print the actual service names.

README.md

@@ -23,50 +23,36 @@ All of the services can be run by following the steps below. Note that since we
 configure Docker with a sufficient amount of resources. Our testing found that [configuring Docker for Mac](https://docs.docker.com/docker-for-mac/#/advanced)
  with 2 CPUs and 4GB of memory works well.
 
-1. Create a Python 3 `virtualenv`. If you're using [virtualenvwrapper](https://virtualenvwrapper.readthedocs.io
-), you can do this with:
+1. The Docker Compose file mounts a host volume for each service's executing code. The host directory is expected to be
+  a sibling of this directory. For example, if this repo is cloned to `~/workspace/devstack`, host volumes will be
+  expected in `~/workspace/course-discovery`, `~/workspace/ecommerce`, etc. These repos can be cloned with the command
+  below.
 
   ```
-  $ mkvirtualenv devstack --python=$(which python3)
+  $ make clone
   ```
 
-  Source the virtualenv and install requirements:
+2. Run the provision command, if you haven't already, to configure the various services with superusers (for
+  development without the auth service) and tenants (for multi-tenancy).
+
+  The username and password for the superusers are both "edx". You can access the services directly via Django admin
+  at the `/admin/` path, or login via single sign-on at `/login/`.
 
   ```
-  $ workon devstack
-  (devstack)$ make requirements
+  $ make devstack.provision
   ```
 
-2. The Docker Compose file mounts a host volume for each service's executing code. The host directory is expected to be
-   a sibling of this directory. For example, if this repo is cloned to `~/workspace/devstack`, host volumes will be
-   expected in `~/workspace/course-discovery`, `~/workspace/ecommerce`, etc. These repos can be cloned with the command
-   below.
+3. Start the services.
 
   ```
-  (devstack)$ make clone
+  $ make devstack.start
   ```
 
-3. Run the provision command, if you haven't already, to configure the various services with superusers (for
-   development without the auth service) and tenants (for multi-tenancy).
-
-   The username and password for the superusers are both "edx". You can access the services directly via Django admin
-   at the `/admin/` path, or login via single sign-on at `/login/`.
-
-   ```
-   (devstack)$ make devstack.provision
-   ```
-
-4. Start the services.
-
-    ```
-    (devstack)$ make devstack.start
-    ```
-
 After the services have started, if you need shell access to one of the services, run `make devstack.open.<service>`.
 For example to access the Catalog/Course Discovery Service, you can run:
 
 ```
-(devstack)$ make devstack.open.discovery
+$ make devstack.open.discovery
 ```
 
 ## Usernames and Passwords

clone.py

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+# Script for cloning Git repos housing edX services. These repos are mounted as
+# data volumes into their corresponding Docker containers to facilitate development.
+# Repos are cloned to the directory above the one housing this file.
+
+repos=(
+    "https://github.com/edx/course-discovery.git"
+    "https://github.com/edx/credentials.git"
+    "https://github.com/edx/ecommerce.git"
+    "https://github.com/edx/edx-platform.git"
+    "https://github.com/edx/programs.git"
+)
+
+name_pattern=".*edx/(.*).git"
+
+for repo in ${repos[*]}
+do
+    # Use Bash's regex match operator to capture the name of the repo.
+    # Results of the match are saved to an array called $BASH_REMATCH.
+    [[ $repo =~ $name_pattern ]]
+    name="${BASH_REMATCH[1]}"
+
+    cd ..
+    if [ -d "$name" ]; then
+        printf "The [%s] repo is already checked out. Continuing.\n" $name
+    else
+        git clone $repo
+    fi
+    cd - &> /dev/null
+done

clone.sh

@@ -1,2 +1 @@
 docker-compose>=1.9.0,<2.0.0
-PyYAML>=3.12,<4.0