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Is it possible to install Haskell and non-Haskell packages within a Python/Django app deployed in Heroku?

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0

My Django application uses packages associated with Haskell, such as HLint, and some non-Haskell packages such as graphviz. I use the shlex command in my app to call a bash script that then goes on to call the package. This runs fine locally.

However, I have also deployed the app to Heroku using Travis - over there, the views designed to activate the bash scripts do not run. I'm running a before_deploy script to install the required packages and the Travis build says they are successfully installed; I don't think the packages are available to the Heroku app.

My question is: is it possible for the required packages to be available in the Heroku app? And if so, how can I configure Heroku to run them via bash or some other means? Any help would be really appreciated!

It may be useful to know that the app is running in a Linux environment, and that I'm using a single Python build pack.

Code

My .travis.yml file is as follows:

sudo: true
language: python
python:
- '3.6'
env:
- DJANGO=2.1.5
install:
- pip install -q Django==$DJANGO
- pip install -q -r requirements.txt
script:
- python manage.py test
before_deploy:
- "./before_deploy.sh"
deploy:
 provider: heroku
 api_key:
 secure: <REDACTED>
 app: hasnetdt-stage
notifications:
 email: false

And here is the before_deploy.sh script for reference:

#!/bin/bash

sudo add-apt-repository -y ppa:hvr/ghc
sudo apt-get update
sudo apt-get install -y cabal-install-1.22 ghc-7.10.2
sudo apt-get install -y graphviz

export PATH=~/.cabal/bin:/opt/cabal/1.22/bin:/opt/ghc/7.10.2/bin:$PATH
cabal sandbox init
cabal update
cabal install alex happy
cabal install hindent hlint

Sidenote:

When I tried deploying locally (i.e. with git push heroku master), the Heroku logs said:

2019-03-24T18:41:29.637402+00:00 app[web.1]: ./static/scripts/prettify.sh: line 3: hindent: command not found
2019-03-24T18:41:29.644886+00:00 app[web.1]: ./static/scripts/linter.sh: line 3: hlint: command not found

But this may be because I deployed it locally rather than with Travis, so the before_deploy script isn't running.

python django bash haskell heroku

share|improve this question

asked Mar 25 at 5:11

Sarthak KumarSarthak Kumar

32

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  After cabal sandbox init, cabal will install in .cabal-sandbox/bin. Is this directory on your PATH?
  
  – bergey
  Mar 26 at 11:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for your comment @bergey. No, it wasn't on my path; however, I removed that line from the before_deploy script and the result was the same. I think the packages are being installed but not actually being deployed in heroku.
  
  – Sarthak Kumar
  Mar 26 at 13:07
  
  

  
  
  
  

add a comment | 

0

My Django application uses packages associated with Haskell, such as HLint, and some non-Haskell packages such as graphviz. I use the shlex command in my app to call a bash script that then goes on to call the package. This runs fine locally.

However, I have also deployed the app to Heroku using Travis - over there, the views designed to activate the bash scripts do not run. I'm running a before_deploy script to install the required packages and the Travis build says they are successfully installed; I don't think the packages are available to the Heroku app.

My question is: is it possible for the required packages to be available in the Heroku app? And if so, how can I configure Heroku to run them via bash or some other means? Any help would be really appreciated!

It may be useful to know that the app is running in a Linux environment, and that I'm using a single Python build pack.

Code

My .travis.yml file is as follows:

sudo: true
language: python
python:
- '3.6'
env:
- DJANGO=2.1.5
install:
- pip install -q Django==$DJANGO
- pip install -q -r requirements.txt
script:
- python manage.py test
before_deploy:
- "./before_deploy.sh"
deploy:
 provider: heroku
 api_key:
 secure: <REDACTED>
 app: hasnetdt-stage
notifications:
 email: false

And here is the before_deploy.sh script for reference:

#!/bin/bash

sudo add-apt-repository -y ppa:hvr/ghc
sudo apt-get update
sudo apt-get install -y cabal-install-1.22 ghc-7.10.2
sudo apt-get install -y graphviz

export PATH=~/.cabal/bin:/opt/cabal/1.22/bin:/opt/ghc/7.10.2/bin:$PATH
cabal sandbox init
cabal update
cabal install alex happy
cabal install hindent hlint

Sidenote:

When I tried deploying locally (i.e. with git push heroku master), the Heroku logs said:

2019-03-24T18:41:29.637402+00:00 app[web.1]: ./static/scripts/prettify.sh: line 3: hindent: command not found
2019-03-24T18:41:29.644886+00:00 app[web.1]: ./static/scripts/linter.sh: line 3: hlint: command not found

But this may be because I deployed it locally rather than with Travis, so the before_deploy script isn't running.

python django bash haskell heroku

share|improve this question

asked Mar 25 at 5:11

Sarthak KumarSarthak Kumar

32

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  After cabal sandbox init, cabal will install in .cabal-sandbox/bin. Is this directory on your PATH?
  
  – bergey
  Mar 26 at 11:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks for your comment @bergey. No, it wasn't on my path; however, I removed that line from the before_deploy script and the result was the same. I think the packages are being installed but not actually being deployed in heroku.
  
  – Sarthak Kumar
  Mar 26 at 13:07
  
  

  
  
  
  

add a comment | 

My Django application uses packages associated with Haskell, such as HLint, and some non-Haskell packages such as graphviz. I use the shlex command in my app to call a bash script that then goes on to call the package. This runs fine locally.

However, I have also deployed the app to Heroku using Travis - over there, the views designed to activate the bash scripts do not run. I'm running a before_deploy script to install the required packages and the Travis build says they are successfully installed; I don't think the packages are available to the Heroku app.

My question is: is it possible for the required packages to be available in the Heroku app? And if so, how can I configure Heroku to run them via bash or some other means? Any help would be really appreciated!

It may be useful to know that the app is running in a Linux environment, and that I'm using a single Python build pack.

Code

My .travis.yml file is as follows:

sudo: true
language: python
python:
- '3.6'
env:
- DJANGO=2.1.5
install:
- pip install -q Django==$DJANGO
- pip install -q -r requirements.txt
script:
- python manage.py test
before_deploy:
- "./before_deploy.sh"
deploy:
 provider: heroku
 api_key:
 secure: <REDACTED>
 app: hasnetdt-stage
notifications:
 email: false

And here is the before_deploy.sh script for reference:

#!/bin/bash

sudo add-apt-repository -y ppa:hvr/ghc
sudo apt-get update
sudo apt-get install -y cabal-install-1.22 ghc-7.10.2
sudo apt-get install -y graphviz

export PATH=~/.cabal/bin:/opt/cabal/1.22/bin:/opt/ghc/7.10.2/bin:$PATH
cabal sandbox init
cabal update
cabal install alex happy
cabal install hindent hlint

Sidenote:

When I tried deploying locally (i.e. with git push heroku master), the Heroku logs said:

2019-03-24T18:41:29.637402+00:00 app[web.1]: ./static/scripts/prettify.sh: line 3: hindent: command not found
2019-03-24T18:41:29.644886+00:00 app[web.1]: ./static/scripts/linter.sh: line 3: hlint: command not found

But this may be because I deployed it locally rather than with Travis, so the before_deploy script isn't running.

python django bash haskell heroku

share|improve this question

asked Mar 25 at 5:11

Sarthak KumarSarthak Kumar

32

sudo: true
language: python
python:
- '3.6'
env:
- DJANGO=2.1.5
install:
- pip install -q Django==$DJANGO
- pip install -q -r requirements.txt
script:
- python manage.py test
before_deploy:
- "./before_deploy.sh"
deploy:
 provider: heroku
 api_key:
 secure: <REDACTED>
 app: hasnetdt-stage
notifications:
 email: false

#!/bin/bash

sudo add-apt-repository -y ppa:hvr/ghc
sudo apt-get update
sudo apt-get install -y cabal-install-1.22 ghc-7.10.2
sudo apt-get install -y graphviz

export PATH=~/.cabal/bin:/opt/cabal/1.22/bin:/opt/ghc/7.10.2/bin:$PATH
cabal sandbox init
cabal update
cabal install alex happy
cabal install hindent hlint

2019-03-24T18:41:29.637402+00:00 app[web.1]: ./static/scripts/prettify.sh: line 3: hindent: command not found
2019-03-24T18:41:29.644886+00:00 app[web.1]: ./static/scripts/linter.sh: line 3: hlint: command not found

share|improve this question

asked Mar 25 at 5:11

Sarthak KumarSarthak Kumar

32

share|improve this question

asked Mar 25 at 5:11

Sarthak KumarSarthak Kumar

32

asked Mar 25 at 5:11

Sarthak KumarSarthak Kumar

32

asked Mar 25 at 5:11

Sarthak KumarSarthak Kumar

32