Many formats generate an image only large enough for the generated NixOS
config. This quickly runs out of space for NixOS servers that are updated
over time rather than being redeployed with fresh images.
Signed-off-by: James Alseth <james@jalseth.me>
this has the positive side effect that the nixos-generate
binary now also works on configurations
that already import one of the nixos modules
That means, we can use the same cli interface regardless if
the config was pre-produced or is produced by the cli on the fly
fix: #181
* rename eval-format.nix to nixos-generate.nix
Make it clear that it's meant to be used by the nixos-generate script
* rename config.nix to configuration.nix
Bring the name closer to /etc/nixos/configuration.nix
* fix the NIXOS_CONFIG
this is the env name that nixos-rebuild uses
* use -I to load the configuration and format
This has a nice side-effect of allowing URLs as configuration
* add Travis CI
* cleanSource
* gitignore nix result files
* use modulesPath everywhere
this makes sure that the passed pkgs in nixos-generate.nix is the same
one we use to load these other modules
* use toString to avoid evaluation error
