#Usage

##1. Generate a new pair of keys just for that

It's not the safest deployment method (ssh private keys in environment variables !) , so you'd better generate a pair of deployment keys just for the occasion

$ ssh-keygen -f ~/.ssh/heroku

##2. Setup your deploy keys on the private repos you're using

Configure the public deploy key (the "~/.ssh/heroku.pub" one ) within your gitlab / github / bitbucket (please check the corresponding documentation)...

##3. Setup your deploy key within heroku

a. Set your deploy keys with heroku toolbelt from within your app dir

$ heroku config:set SSH_DEPLOY_KEY_PRIV="$(cat ~/.ssh/heroku)"
$ heroku config:set SSH_DEPLOY_KEY_PUB="$(cat ~/.ssh/heroku.pub)"

b. This buildpack is to be chained at the beginning of a multi-buildpacks buildpacks chain like this one

$ heroku buildpack:set https://github.com/heroku/heroku-buildpack-multi.git
$ heroku config:add BUILDPACK_URL=https://github.com/heroku/heroku-buildpack-multi.git

c. Create your .buildpacks file : here for a nodejs app

$ cat .buildpacks
https://github.com/levequej/heroku-buildpack-ssh-deploy-from-private-git-ssh-repos.git
https://github.com/heroku/heroku-buildpack-nodejs.git

##4 Deal with git management in your package manager here for NPM

$cat .npmrc
git=${PWD}/.ssh/git-ssh-command.sh

UPDATE : or you could also use the envvar npm_config_git like so (I like it better b/c it does not interfere with your local build, and you do not need a different .npmrc in your heroku branch if you've got one

$ heroku config:set npm_config_git="\${PWD}/.ssh/git-ssh-command.sh"

All comments & suggestions are welcome

There must be a better way to solve this simple problem and maybe I'd better just have forked the nodejs official buildpack : I don't know I did not check it, but I needed a quick solution for my first heroku app to work asap ,and I came up with that, it works and its portable.

I guess if you use a github private repo you'd much better use a OAuth token for you own safety.

Tested on linux with a private bitbucket repo (I do not think they have Oauth for non team repos : do they ?)