When specifying the `builder` attribute in `stdenv.mkDerivation`, this
will be effectively transformed into
builtins.derivation {
builder = stdenv.shell;
args = [ "-e" builder ];
}
This also means that `default-builder.sh` is never sourced and as a
result it's not guaranteed that `$NIX_ATTRS_SH_FILE` is set to a correct
location[1].
Also, we need to source `.attrs.sh` to source `$stdenv`. So, the
following is done now:
* If `$NIX_ATTRS_SH_FILE` points to a correct location, then use it.
Directly using `.attrs.sh` is problematic for `nix-shell(1)` usage
(see previous commit for more context), so prefer the environment
variable if possible.
* Otherwise, if `.attrs.sh` exists, then use it. See [1] for when this
can happen.
* If neither applies, it can be assumed that `__structuredAttrs` is
turned off and thus nothing needs to be done.
[1] It's possible that it doesn't exist at all - in case of Nix 2.3 or
it can point to a wrong location on older Nix versions with a bug in
`__structuredAttrs`.
- fetchdarcs_2pre added
- flapjax added
- no longer used : annotatedDerivations
- added bleeding edge repos with a tiny nix repository manager which dowloads and
updates repostiries, then creates tar.gz dist files which are used by bleeding_edge_source
(darcs tested only by now)
- added experimental my_environment with example
svn path=/nixpkgs/trunk/; revision=10974
* added an experimental fetchdarcs function, based on fetchsvn
(there are no expressions yet that use this function)
svn path=/nixpkgs/trunk/; revision=4615
