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0

I'm trying to implement Deploy to Heroku functionality for my Python application:
https://github.com/jet-admin/jet-bridge/tree/heroku

It woks OK if just use requirements.txt to install dependencies, but it require me to modify my requirements.txt to include some extra packages that i normally don't need (psycopg2, mysqlclient).

Is it possible not to include all requirements in requirements.txt, but install it with some extra command? I've tried adding postdeploy script which will perform pip install command, but after deploy succed my application says that psycopg2 is not installed (thought i installed it in postdeploy command).

python heroku pip tornado

share|improve this question

asked Mar 21 at 15:23

Denis KildishevDenis Kildishev

3601413

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  "it require me to modify my requirements.txt to include some extra packages that i normally don't need (psycopg2, mysqlclient)"—why don't you normally need those packages? What's different on Heroku? (Note that developing with one database engine and deploying to another is a generally bad idea. They're not drop-in replacements for each other.) I think the reason postdeploy isn't working is that it runs after your slug has already been compiled. Your libraries need to be included in the slug.
  
  – Chris
  Mar 21 at 16:50
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Chris because by application is compatible with many databases thanks to ORM. so code in repository should not have all possible database adapters, but for application on heroku I need to include all of them, so that users can deploy it to Heroku and use it with their specific database. Is it possible to pip install somehow another way without including dep in requirements.txt ?
  
  – Denis Kildishev
  Mar 22 at 6:35
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If you want it to be run on Heroku I think your only options are (a) to include all of those dependencies in requirements.txt (or in Pipfile and Pipfile.lock if you would rather user Pipenv) or (b) to have your users modify those files before deploying.
  
  – Chris
  Mar 22 at 12:03
  

  
  
  
  

add a comment | 

0

I'm trying to implement Deploy to Heroku functionality for my Python application:
https://github.com/jet-admin/jet-bridge/tree/heroku

It woks OK if just use requirements.txt to install dependencies, but it require me to modify my requirements.txt to include some extra packages that i normally don't need (psycopg2, mysqlclient).

Is it possible not to include all requirements in requirements.txt, but install it with some extra command? I've tried adding postdeploy script which will perform pip install command, but after deploy succed my application says that psycopg2 is not installed (thought i installed it in postdeploy command).

python heroku pip tornado

share|improve this question

asked Mar 21 at 15:23

Denis KildishevDenis Kildishev

3601413

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  "it require me to modify my requirements.txt to include some extra packages that i normally don't need (psycopg2, mysqlclient)"—why don't you normally need those packages? What's different on Heroku? (Note that developing with one database engine and deploying to another is a generally bad idea. They're not drop-in replacements for each other.) I think the reason postdeploy isn't working is that it runs after your slug has already been compiled. Your libraries need to be included in the slug.
  
  – Chris
  Mar 21 at 16:50
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Chris because by application is compatible with many databases thanks to ORM. so code in repository should not have all possible database adapters, but for application on heroku I need to include all of them, so that users can deploy it to Heroku and use it with their specific database. Is it possible to pip install somehow another way without including dep in requirements.txt ?
  
  – Denis Kildishev
  Mar 22 at 6:35
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If you want it to be run on Heroku I think your only options are (a) to include all of those dependencies in requirements.txt (or in Pipfile and Pipfile.lock if you would rather user Pipenv) or (b) to have your users modify those files before deploying.
  
  – Chris
  Mar 22 at 12:03
  

  
  
  
  

add a comment | 

I'm trying to implement Deploy to Heroku functionality for my Python application:
https://github.com/jet-admin/jet-bridge/tree/heroku

It woks OK if just use requirements.txt to install dependencies, but it require me to modify my requirements.txt to include some extra packages that i normally don't need (psycopg2, mysqlclient).

Is it possible not to include all requirements in requirements.txt, but install it with some extra command? I've tried adding postdeploy script which will perform pip install command, but after deploy succed my application says that psycopg2 is not installed (thought i installed it in postdeploy command).

python heroku pip tornado

share|improve this question

asked Mar 21 at 15:23

Denis KildishevDenis Kildishev

3601413

share|improve this question

asked Mar 21 at 15:23

Denis KildishevDenis Kildishev

3601413

share|improve this question

asked Mar 21 at 15:23

Denis KildishevDenis Kildishev

3601413

asked Mar 21 at 15:23

Denis KildishevDenis Kildishev

3601413

asked Mar 21 at 15:23

Denis KildishevDenis Kildishev

3601413

1 Answer
1

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0

The Heroku Python buildpack has a hook where you can execute extra commands after the initial slug compilation.

To use it, you can add a bin/post_compile file, putting inside the shell commands for installing the extra packages.

You can even make it depend on an environment variable, like:

# assuming you have files mysql-requirements.txt and postgres-requirements.txt
if [ "$JET_BRIDGE_DB" == "mysql" ]; then
 echo "Installing Python dependencies for MySQL support"
 pip install -r mysql-requirements.txt
else
 echo "Assuming Postgres database, installing Python dependencies"
 pip install -r postgres-requirements.txt
fi

Read more:

• Buildpacks: https://devcenter.heroku.com/articles/buildpacks
  


• Heroku Python Buildpack: https://github.com/heroku/heroku-buildpack-python
  


• Slug compilation: https://devcenter.heroku.com/articles/slug-compiler
  

share|improve this answer

answered Mar 22 at 14:43

eliaselias

14.1k84882

add a comment | 

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0

The Heroku Python buildpack has a hook where you can execute extra commands after the initial slug compilation.

To use it, you can add a bin/post_compile file, putting inside the shell commands for installing the extra packages.

You can even make it depend on an environment variable, like:

# assuming you have files mysql-requirements.txt and postgres-requirements.txt
if [ "$JET_BRIDGE_DB" == "mysql" ]; then
 echo "Installing Python dependencies for MySQL support"
 pip install -r mysql-requirements.txt
else
 echo "Assuming Postgres database, installing Python dependencies"
 pip install -r postgres-requirements.txt
fi

Read more:

• Buildpacks: https://devcenter.heroku.com/articles/buildpacks
  


• Heroku Python Buildpack: https://github.com/heroku/heroku-buildpack-python
  


• Slug compilation: https://devcenter.heroku.com/articles/slug-compiler
  

share|improve this answer

answered Mar 22 at 14:43

eliaselias

14.1k84882

add a comment | 

0

The Heroku Python buildpack has a hook where you can execute extra commands after the initial slug compilation.

To use it, you can add a bin/post_compile file, putting inside the shell commands for installing the extra packages.

You can even make it depend on an environment variable, like:

# assuming you have files mysql-requirements.txt and postgres-requirements.txt
if [ "$JET_BRIDGE_DB" == "mysql" ]; then
 echo "Installing Python dependencies for MySQL support"
 pip install -r mysql-requirements.txt
else
 echo "Assuming Postgres database, installing Python dependencies"
 pip install -r postgres-requirements.txt
fi

Read more:

• Buildpacks: https://devcenter.heroku.com/articles/buildpacks
  


• Heroku Python Buildpack: https://github.com/heroku/heroku-buildpack-python
  


• Slug compilation: https://devcenter.heroku.com/articles/slug-compiler
  

share|improve this answer

answered Mar 22 at 14:43

eliaselias

14.1k84882

add a comment | 

The Heroku Python buildpack has a hook where you can execute extra commands after the initial slug compilation.

To use it, you can add a bin/post_compile file, putting inside the shell commands for installing the extra packages.

You can even make it depend on an environment variable, like:

# assuming you have files mysql-requirements.txt and postgres-requirements.txt
if [ "$JET_BRIDGE_DB" == "mysql" ]; then
 echo "Installing Python dependencies for MySQL support"
 pip install -r mysql-requirements.txt
else
 echo "Assuming Postgres database, installing Python dependencies"
 pip install -r postgres-requirements.txt
fi

Read more:

• Buildpacks: https://devcenter.heroku.com/articles/buildpacks
  


• Heroku Python Buildpack: https://github.com/heroku/heroku-buildpack-python
  


• Slug compilation: https://devcenter.heroku.com/articles/slug-compiler
  

share|improve this answer

answered Mar 22 at 14:43

eliaselias

14.1k84882

# assuming you have files mysql-requirements.txt and postgres-requirements.txt
if [ "$JET_BRIDGE_DB" == "mysql" ]; then
 echo "Installing Python dependencies for MySQL support"
 pip install -r mysql-requirements.txt
else
 echo "Assuming Postgres database, installing Python dependencies"
 pip install -r postgres-requirements.txt
fi

share|improve this answer

answered Mar 22 at 14:43

eliaselias

14.1k84882

answered Mar 22 at 14:43

eliaselias

14.1k84882

answered Mar 22 at 14:43

eliaselias

14.1k84882