Heroku buildpack: Py+Geo

This is a Heroku buildpack for Python apps, powered by pip.

It has been modified from the Heroku original to add precompiled binaries for GEOS, PROJ.4, GDAL, and Shapely.

Optionally, it will also fetch and convert a single zipped OGR datasource to /app/datasource.shp when provided with the environment variable ZIPPED_DATA_URL. Note that Heroku stack must be set to cedar for this to work:

Usage

Example usage:

$ ls
Procfile  requirements.txt  web.py

$ heroku create --stack cedar --buildpack https://github.com/codeforamerica/heroku-buildpack-pygeo

The following step is optional, and will create /app/datasource.shp based on the remote file.

$ heroku config:set ZIPPED_DATA_URL=http://forever.codeforamerica.org/heroku-pygeo/data-sfgov-org-parcels.zip

Make it so.

$ git push heroku master
...
-----> Fetching custom git buildpack... done
-----> Python app detected
-----> No runtime.txt provided; assuming python-2.7.4.
-----> Preparing Python runtime (python-2.7.4)
-----> Installing Distribute (0.6.36)
-----> Installing Pip (1.3.1)
-----> Fetching and installing GEOS 3.3.8
       GEOS cached in /app/tmp/repo.git/.cache/vendor/geos
-----> Fetching and installing Proj 4.8.0
       Proj cached in /app/tmp/repo.git/.cache/vendor/proj
-----> Fetching and installing GDAL 1.10.0
       GDAL cached in /app/tmp/repo.git/.cache/vendor/gdal
-----> Preparing datasource
       Downloading http://forever.codeforamerica.org/heroku-pygeo/data-sfgov-org-parcels.zip to /app/tmp/repo.git/.cache/2aac292c2cbe849d129ccb4bbb7c1c3d.zip
       citylots.dbf --> /tmp/tmpiAkkBI/datasource.dbf
       citylots.prj --> /tmp/tmpiAkkBI/datasource.prj
       citylots.shp --> /tmp/tmpiAkkBI/datasource.shp
       citylots.shx --> /tmp/tmpiAkkBI/datasource.shx
       /tmp/tmpiAkkBI/datasource.shp --> /app/tmp/repo.git/.cache/datasource.shp
       (ogr2ogr might take a long time)
-----> Installing dependencies using Pip (1.3.1)
       ...
       Successfully installed shapely
       Cleaning up...

You can also add it to upcoming builds of an existing application:

$ heroku config:add BUILDPACK_URL=git://github.com/codeforamerica/heroku-buildpack-pygeo.git

The buildpack will detect your app as Python if it has the file requirements.txt in the root.

It will use Pip to install your dependencies, vendoring a copy of the Python runtime into your slug.

Specify a Runtime

You can also provide arbitrary releases Python with a runtime.txt file.

$ cat runtime.txt
python-3.3.0

Runtime options include:

• python-2.7.4
• python-3.3.1
• pypy-1.9 (experimental)