87d5e6fc1a
Before this change, a Dhall package like the Prelude would be
encoded as a record with one field per supported version. Then
downstream packages would specify which package to override
by selecting a different record field.
The problem with that approach is that it did not provide an
easy way to override a package to a version other than the default
ones supplied by Nixpkgs. Normally you would use the `.override`
method for this purpose, but the `override` method added by
`buildDhall{Directory,GitHub}Package` is clobbered by the
`override` method added by `callPackage` in
`./pkgs/top-level/dhall-packages.nix`.
The solution is to add a separate `.overridePackage` method which is
essentially the exact same as `.override`, except that it is no
longer clobbered by `callPackage`. This `.overridePackage` method
allows one to override the arguments supplied to
`buildDhall{Directory,GitHub}Package`, making it easier to specify
package versions outside of the ones supported by Nixpkgs..
This also includes a change to only build one (preferred) version of each
package (instead of multiple supported versions per package), in order to
minimize the maintenance burden for the Dhall package set.
|
||
|---|---|---|
| .. | ||
| androidndk-pkgs | ||
| arduino | ||
| beam-modules | ||
| bower-modules/generic | ||
| chez-modules | ||
| compilers | ||
| coq-modules | ||
| dhall-modules | ||
| dotnet-modules | ||
| em-modules/generic | ||
| go-modules | ||
| go-packages | ||
| guile-modules | ||
| haskell-modules | ||
| idris-modules | ||
| interpreters | ||
| java-modules | ||
| libraries | ||
| lisp-modules | ||
| lua-modules | ||
| misc | ||
| mobile | ||
| node-packages | ||
| ocaml-modules | ||
| perl-modules | ||
| pharo | ||
| php-packages | ||
| pure-modules | ||
| python-modules | ||
| r-modules | ||
| ruby-modules | ||
| tools | ||
| web | ||