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I need to add the pipeline

source file -> latex -> pdf file

to a rails app that I am working on and that is deployed at heroku (http://vschool.herokuapp.com). I've tried following the advice at 

https://github.com/holiture/heroku-buildpack-tex

and also the further advice on using mutipacks, e.g., doing

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

after creating a file .buildpacks with contents

git://github.com/heroku/heroku-buildpack-python.git
git://github.com/holiture/heroku-buildpack-tex.git
git://github.com/heroku/heroku-buildpack-ruby.git

Here is what happens when I push:

$ git push heroku master
Counting objects: 11, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (6/6), done.
Writing objects: 100% (6/6), 480 bytes | 0 bytes/s, done.
Total 6 (delta 5), reused 0 (delta 0)

-----> Fetching custom git buildpack... done

 !     Push rejected, no Cedar-supported app detected

To git@heroku.com:vschool.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:vschool.git'

After this my app is hosed and I have to do this:

$ heroku config:unset BUILDPACK_URL

after which I am returned to a working state.

I must not have understood how to install multiple buildpacks. Any advice would be much appreciated.

jxxcarlson
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1 Answers1

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Try replacing your .buildpack with

git://github.com/heroku/heroku-buildpack-ruby.git
git://github.com/holiture/heroku-buildpack-tex.git

It seems that Heroku may be searching for a Python-specific file (requirements.txt or setup.py) when it is building your app, instead of a Ruby-specific file (the Gemfile).

Benjamin Manns
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  • Hi, thanks so much. I tried that, but got the same kind of error: `! [remote rejected] master -> master (pre-receive hook declined)` `error: failed to push some refs to 'git@heroku.com:vschool.git'` – jxxcarlson Oct 13 '13 at 03:53
  • That error looks like a problem with your git repository. Did you use `git commit --amend`? Has anyone else been working on the server. If it is just you, run `git push heroku master --force` to force update Heroku's copy. If others are pushing code, you should pull in their changes `git pull heroku master` then `git push heroku master`. – Benjamin Manns Oct 13 '13 at 21:42
  • It is just me. I will try --force. Thanks! – jxxcarlson Oct 14 '13 at 01:52