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0

I would like to pack a python program and ship it in a deb package.

For reasons (I know in 99% it is bad practice) I want to ship the program in a python virtual environment within a debian package.

I know I can do this using dh-virtualenv. This works great - generally no problem.
But the problem arises when I want to upload this to launchpad. Uploading to launchpad means uploading a source package. In terms of dh-virtualenv a source package is the package description, where the virtualenv has not been created, yet.

What happens when I upload this to launchpad is, that the package will not build, since the dh-virtualenv which is executed during the build process on launchpad will try to install python modules into the virtualenv, which means installing these from the PyPI, which will not work, since launchpad does not allow external network access.

So basically there are two possible solutions:

Approach A

Prepare the virtualenv and somehow incorporate it into the source package and having the dh build process simply "move" this prepared virtualenv to its end location. This could work with virtualenv --relocatable. BUT the relocation strips the utf-8 marker at the beginning of all python scripts, rendering all python scripts in the virtualenv broken.

Apporach B

Somehow cache all necessary python packages in the source package and have dh_virtualenv install from the cache instead of from PyPI.
This seems like to be doable with pip2pi, but certain experiements show, that it will not install packages, although they are located in the local package index.

Both approaches seem a bit clumsy and prone to errors.
What do you think of this?
What are your experiences?
What would you recommend?

python virtualenv dpkg

share|improve this question

asked Mar 25 at 18:42

cornelinuxcornelinux

55244 silver badges1515 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I would recommend doing it properly and packaging every dependency separately. Consider that py2deb exists and it helps you creating a skeleton structure from pip dependencies.
  
  – LtWorf
  Mar 25 at 18:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I knew that s.o. would say this. But considering we also want to provide the software on other distros, this would get a fulltime job, which I am currently not willing to take. But thanks for your point of view!
  
  – cornelinux
  Mar 25 at 21:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If you learn proper packaging, you'll find out that it's easier than your own hand written scripts. (I contribute to Debian).
  
  – LtWorf
  Mar 25 at 23:01
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also, are you still using python2?
  
  – LtWorf
  Mar 25 at 23:12
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @LtWorf I have no time to explain the above mentioned many reasons and you are obviously not interested in. Anyway thanks for your time to comment on this.
  
  – cornelinux
  Mar 26 at 6:10
  

  
  
  
  

 | 
show 1 more comment

0

I would like to pack a python program and ship it in a deb package.

For reasons (I know in 99% it is bad practice) I want to ship the program in a python virtual environment within a debian package.

I know I can do this using dh-virtualenv. This works great - generally no problem.
But the problem arises when I want to upload this to launchpad. Uploading to launchpad means uploading a source package. In terms of dh-virtualenv a source package is the package description, where the virtualenv has not been created, yet.

What happens when I upload this to launchpad is, that the package will not build, since the dh-virtualenv which is executed during the build process on launchpad will try to install python modules into the virtualenv, which means installing these from the PyPI, which will not work, since launchpad does not allow external network access.

So basically there are two possible solutions:

Approach A

Prepare the virtualenv and somehow incorporate it into the source package and having the dh build process simply "move" this prepared virtualenv to its end location. This could work with virtualenv --relocatable. BUT the relocation strips the utf-8 marker at the beginning of all python scripts, rendering all python scripts in the virtualenv broken.

Apporach B

Somehow cache all necessary python packages in the source package and have dh_virtualenv install from the cache instead of from PyPI.
This seems like to be doable with pip2pi, but certain experiements show, that it will not install packages, although they are located in the local package index.

Both approaches seem a bit clumsy and prone to errors.
What do you think of this?
What are your experiences?
What would you recommend?

python virtualenv dpkg

share|improve this question

asked Mar 25 at 18:42

cornelinuxcornelinux

55244 silver badges1515 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I would recommend doing it properly and packaging every dependency separately. Consider that py2deb exists and it helps you creating a skeleton structure from pip dependencies.
  
  – LtWorf
  Mar 25 at 18:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I knew that s.o. would say this. But considering we also want to provide the software on other distros, this would get a fulltime job, which I am currently not willing to take. But thanks for your point of view!
  
  – cornelinux
  Mar 25 at 21:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If you learn proper packaging, you'll find out that it's easier than your own hand written scripts. (I contribute to Debian).
  
  – LtWorf
  Mar 25 at 23:01
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also, are you still using python2?
  
  – LtWorf
  Mar 25 at 23:12
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @LtWorf I have no time to explain the above mentioned many reasons and you are obviously not interested in. Anyway thanks for your time to comment on this.
  
  – cornelinux
  Mar 26 at 6:10
  

  
  
  
  

 | 
show 1 more comment

I would like to pack a python program and ship it in a deb package.

For reasons (I know in 99% it is bad practice) I want to ship the program in a python virtual environment within a debian package.

I know I can do this using dh-virtualenv. This works great - generally no problem.
But the problem arises when I want to upload this to launchpad. Uploading to launchpad means uploading a source package. In terms of dh-virtualenv a source package is the package description, where the virtualenv has not been created, yet.

What happens when I upload this to launchpad is, that the package will not build, since the dh-virtualenv which is executed during the build process on launchpad will try to install python modules into the virtualenv, which means installing these from the PyPI, which will not work, since launchpad does not allow external network access.

So basically there are two possible solutions:

Approach A

Prepare the virtualenv and somehow incorporate it into the source package and having the dh build process simply "move" this prepared virtualenv to its end location. This could work with virtualenv --relocatable. BUT the relocation strips the utf-8 marker at the beginning of all python scripts, rendering all python scripts in the virtualenv broken.

Apporach B

Somehow cache all necessary python packages in the source package and have dh_virtualenv install from the cache instead of from PyPI.
This seems like to be doable with pip2pi, but certain experiements show, that it will not install packages, although they are located in the local package index.

Both approaches seem a bit clumsy and prone to errors.
What do you think of this?
What are your experiences?
What would you recommend?

python virtualenv dpkg

share|improve this question

asked Mar 25 at 18:42

cornelinuxcornelinux

55244 silver badges1515 bronze badges

share|improve this question

asked Mar 25 at 18:42

cornelinuxcornelinux

55244 silver badges1515 bronze badges

share|improve this question

asked Mar 25 at 18:42

cornelinuxcornelinux

55244 silver badges1515 bronze badges

asked Mar 25 at 18:42

cornelinuxcornelinux

55244 silver badges1515 bronze badges

asked Mar 25 at 18:42

cornelinuxcornelinux

55244 silver badges1515 bronze badges