Check out https://github.com/benalavi/buildpack-packages which is a more
up-to-date way to install s3cmd (and other simple binary packages) on Heroku.
Heroku buildpack that installs exiftool.
You probably want to compose this with other buildpack(s) using heroku-buildpack-multi (https://github.com/ddollar/heroku-buildpack-multi):
Set your buildpack:
heroku config:set BUILDPACK_URL=https://github.com/ddollar/heroku-buildpack-multi
And add this to your .buildpacks, i.e.:
https://github.com/benalavi/buildpack-exiftool
https://github.com/heroku/heroku-buildpack-ruby
Once built you will have exiftool available on PATH.
ruby test/buildpack_test.rb
There is also a Vagrantfile which will set up a VM with the build/test
environment ready to go:
vagrant up
vagrant ssh
cd /vagrant
ruby test/buildpack_test.rb
The exiftool-9.40 package this buildpack installs is available at https://s3.amazonaws.com/buildpack-exiftool/exiftool-9.40.tar.gz.
It is simply a repackaged version of the one available at
http://www.sno.phy.queensu.ca/~phil/exiftool/ with only the exiftool binary and
required lib folder included.