Installing pdftotext library on heroku

[Joel Mathew]

pdftotext library is a requirement in requirements.txt. While trying to push to heroku, I get the following error:

remote:          Running setup.py install for pdftotext: started
remote:            Running setup.py install for pdftotext: finished with status 'error'
remote:            Complete output from command /app/.heroku/python/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-rnbekz45/pdftotext/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-o0if2tl3-record/install-record.txt --single-version-externally-managed --compile:
remote:            /app/.heroku/python/lib/python3.6/distutils/dist.py:261: UserWarning: Unknown distribution option: 'long_description_content_type'
remote:              warnings.warn(msg)
remote:            running install
remote:            running build
remote:            running build_ext
remote:            building 'pdftotext' extension
remote:            creating build
remote:            creating build/temp.linux-x86_64-3.6
remote:            gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -DPOPPLER_CPP_AT_LEAST_0_30_0=0 -I/app/.heroku/python/include/python3.6m -c pdftotext.cpp -o build/temp.linux-x86_64-3.6/pdftotext.o -Wall
remote:            pdftotext.cpp:3:10: fatal error: poppler/cpp/poppler-document.h: No such file or directory
remote:             #include <poppler/cpp/poppler-document.h>
remote:                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
remote:            compilation terminated.
remote:            error: command 'gcc' failed with exit status 1
remote:            
remote:            ----------------------------------------
remote:        Command "/app/.heroku/python/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-rnbekz45/pdftotext/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-o0if2tl3-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-rnbekz45/pdftotext/
remote:  !     Push rejected, failed to compile Python app.
remote: 
remote:  !     Push failed

Normally I'd solve this by installing libpoppler-cpp-dev with apt. But on heroku, I don't have root access to do that. Is there a solution for this?

Sincerely yours,

 Joel G Mathew

[joelryan2k]

I'm curious about this, too. I've been using docker containers on heroku to avoid potential issues like this.

[Joel Mathew]

This was solved after a user helped me out on StackOverflow. The solution is to use build packs. 

https://help.heroku.com/IYRYW6VB/how-do-i-install-additional-software-packages-that-my-application-requires

Sincerely yours,

 Joel G Mathew

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