Describe the Feature

Could the packages/install target work with custom git repos?

Use Case

I was playing with idea of having a fork of https://github.com/cloudposse/packages.

In general I like the idea of submitting PR's back to this repo, but wondering if these will get a bit too specific to my own use-cases. For now I've got my own fork that I would like to use with build-harness to install packages for my project needs.

Describe Ideal Solution

Would love to set an variable in the top-level build-harnessMakefile that could control this:

export PACKAGES_VERSION = master
export PACKAGES_VENDOR ?= cloudposse
export PACKAGES_REPO ?= packages.git

Then in the modules/packages/install

## Install packages 
packages/install:
	@if [ ! -d $(PACKAGES_PATH) ]; then \
	  echo "Installing packages ref=$(PACKAGES_VERSION)..."; \
	  rm -rf $(PACKAGES_PATH); \
	  $(GIT) clone -c advice.detachedHead=false --depth=1 -b $(PACKAGES_VERSION) https://github.com/$(PACKAGES_VENDOR)/$(PACKAGES_REPO) $(PACKAGES_PATH); \
	  rm -rf $(PACKAGES_PATH)/.git; \
	fi 

Currently I do this as a module override, but it generates a lot of noise:

... /build-harness-extensions/modules/packages/Makefile:9: warning: overriding recipe for target 'packages/install'
... /build-harness/modules/packages/Makefile:15: warning: ignoring old recipe for target 'packages/install'

Questions

1 - Is there any way to avoid printing out those warnings when overriding recipes?
2 - Would you accept a PR for making package-vendor/repo configurable?