declare "extras" in requirements.txt

[ewjoachim]

This is a feature request.

When pkg_resources creates an egg file, the egg_info contains a "requires.txt" that ressembles a lot to the requirements.txt format except that it also contains the "extras" information that the setup.py declares, with brackets tags, having this form :

package1==1.2.3
package2==4.5.6

[specific_feature]
package3

[other_feature]
package4

If pip would parse this format, or a format like this, that could reduce a lot the need for having multiple files with a base.txt file and all other files beggining with -r base.txt (see for exemple this folder : https://github.com/twoscoops/django-twoscoops-project/tree/develop/requirements )

One would then call it using pip install -r requirements.txt[specific_feature] (to install packages 1, 2 and 3) or just pip install -r requirements.txt to install packages 1 and 2

Thank you

[boblannon]

+1

[piotr-dobrogost]

See issue #1795

[rbtcollins]

This doesn't make sense to me. extras are exported metadata about a package. requirements.txt are local pins to facilitate deployments. Any extras needed should be in your setup.cfg / setup.py extra_requires section.

[sigmavirus24]

== @rbtcollins

[dstufft]

Yea I agree. Going to close this.