heroku-buildpack-rgeo-prep

This buildpack overwrites Heroku's default .bundle/config to set BUNDLE_BUILD__RGEO to Heroku's build directory.

Setup

This solution closely follows this blog article by SpacialDB.

Create this .buildpacks file in the root of your project.

https://github.com/peterkeen/heroku-buildpack-vendorbinaries.git
https://github.com/aaronrenner/heroku-buildpack-rgeo-prep.git
https://github.com/heroku/heroku-buildpack-ruby.git

Create this .vendor_urls file in the root of your project.

https://s3.amazonaws.com/spacialdb/heroku/geos-3.4.2.tar.gz
https://s3.amazonaws.com/spacialdb/heroku/proj-4.8.0.tar.gz

Add these files to git.

Now, set up your heroku configuration.

heroku config:set BUILDPACK_URL=https://github.com/ddollar/heroku-buildpack-multi.git LD_LIBRARY_PATH=/app/lib

If you haven't already set up your heroku database for postgis, you need to run the following steps. You currently must have a production level database to enable postgis.

Since postgis uses different settings in the database.yml, you need to modify the DATABASE_URL variable. Run the following command and extract the nessecary components out of it:

$ heroku config:get DATABASE_URL 
postgres://<username>:<password>@<host>:<port>/<database>

With those variables, run the following command

$ heroku config:set DATABASE_URL="postgis://<username>:<password>@<host>:<port>/<database>?postgis_extension=true&search_schema_path=public,postgis"

Enable PostGIS

$ heroku pg:psql
=> CREATE EXTENSION postgis;

Deploy

git push heroku master

Verify it worked

heroku run bash
~> bundle exec rails c

>> RGeo::Geos.supported?
=> true
>> RGeo::CoordSys::Proj4.supported?
=> true

If both of these are true, you should be ready to go.

Credits

This solution draws from many people's research including

• https://github.com/jcamenisch/heroku-buildpack-rgeo
• https://github.com/davekapp for help with troubleshooting the extconf.rb build process
• https://gist.github.com/perplexes/5357663