Dmitry Bogatov <kact...@gnu.org> skribis:
> Currently, I am at master branch. I want install parallel-20151122.
> But it is gone since 0877e. I propose to keep *all* versions,
> but just 'parallel' refer to latest.
First, I think it’s important to distinguish the source (the package
recipes in gnu/packages/*.scm) and the installed packages (stuff in
/gnu/store.)
Users can keep the versions they want in their store and in their
profiles.
For recipes, as Andreas noted, it would be terrible for Guix as a
project to provide and maintain zillions of different versions of each
package (keeping them all would be easy, but we want to provide packages
that actually build :-)).
However, users can write their own modules containing different versions
or variants of the packages. For instance, you could write:
(define-module (my-packages)
#:use-module (gnu packages parallel))
(define my-parallel
;; Inherit from the Parallel recipe that Guix provides, but override
;; the version being used.
(package
(inherit parallel)
(version "x.y.z")
(source (origin
(method url-fetch)
(uri (string-append "mirror://gnu/parallel/parallel-"
version ".tar.bz2"))
(sha256
(base32
"0phn9dlkqlq3cq468ypxbbn78bsjcin743pyvf8ip4qg6jz662jm"))))))
Then drop that in ‘GUIX_PACKAGE_PATH’, and run:
guix package -i parallel-x.y.z
HTH,
Ludo’.
