liminix/lon.nix

42 lines
1.1 KiB
Nix
Raw Permalink Normal View History

# Generated by lon. Do not modify!
let
lock = builtins.fromJSON (builtins.readFile ./lon.lock);
# Override with a path defined in an environment variable. If no variable is
# set, the original path is used.
overrideFromEnv =
name: path:
let
replacement = builtins.getEnv "LON_OVERRIDE_${name}";
in
if replacement == "" then
path
else
# this turns the string into an actual Nix path (for both absolute and
# relative paths)
if builtins.substring 0 1 replacement == "/" then
/. + replacement
else
/. + builtins.getEnv "PWD" + "/${replacement}";
fetchSource =
args@{ fetchType, ... }:
if fetchType == "git" then
builtins.fetchGit {
url = args.url;
ref = args.branch;
rev = args.revision;
narHash = args.hash;
}
else if fetchType == "tarball" then
builtins.fetchTarball {
url = args.url;
sha256 = args.hash;
}
else
builtins.throw "Unsupported source type ${fetchType}";
in
builtins.mapAttrs (name: args: overrideFromEnv name (fetchSource args)) lock.sources