Heroku NodeJS app using OpenCV

Question

I have tried so many buildpacks and googled so many SO articles, but I just cannot deploy my NodeJS app. All buildpacks are out-of-date for 2+ years and none of them work.

Answer 1

I ran into the exact same issue -- here's what worked for me:

If your stack is heroku-16, these are the Heroku buildpacks you want to add (in this particular order!):

• https://github.com/Starkast/heroku-buildpack-cmake.git
• https://github.com/onboardiq/heroku16-buildpack-opencv3.git
• heroku/nodejs

Answer 2

So, it is very well known that once you give up and post a question to SO, the solution eventually comes up!

# NodeJS buildpack

$ heroku buildpacks:add heroku/nodejs

# OpenCV builbpack

$ heroku buildpacks:add --index 1 https://github.com/automata/heroku-buildpack-opencv.git

# Downgrade to Cedar 14
# since on Cedar 16 it won't work without extra configurations

$ heroku stack:set cedar-14

# Push to Heroku

$ git push heroku

# After deploying your app may scale down to 0 dynos
# ... so increase dynos amount to the desired number

$ heroku ps:scale web=1

Perfect for a hobby project!

Note: if you have multiple apps, simply add --app YOUR-APP-NAME to the end of each command.