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| author | John Ericson <Ericson2314@Yahoo.com> | 2016-04-26 10:53:31 -0700 |
|---|---|---|
| committer | John Ericson <Ericson2314@Yahoo.com> | 2016-07-14 14:33:23 -0700 |
| commit | 4af2bf66631d187d952b70fba4963e33002d1dcb (patch) | |
| tree | f1750f69a1519370f0ef7761fc66f9dbfd682982 /pkgs/top-level/impure.nix | |
| parent | 18a91ddfb66f2f3f706b93a874152a428874d346 (diff) | |
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Separate fix-point from config importing hacks and other impurities
Diffstat (limited to 'pkgs/top-level/impure.nix')
| -rw-r--r-- | pkgs/top-level/impure.nix | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/pkgs/top-level/impure.nix b/pkgs/top-level/impure.nix new file mode 100644 index 00000000000..e9066815927 --- /dev/null +++ b/pkgs/top-level/impure.nix @@ -0,0 +1,24 @@ +/* Impure default args for `pkgs/top-level/default.nix`. See that file + for the meaning of each argument. */ + +{ # Fallback: Assume we are building packages for the current (host, in GNU + # Autotools parlance) system. + system ? builtins.currentSystem + +, # Fallback: The contents of the configuration file found at $NIXPKGS_CONFIG or + # $HOME/.nixpkgs/config.nix. + config ? let + inherit (builtins) getEnv pathExists; + + configFile = getEnv "NIXPKGS_CONFIG"; + homeDir = getEnv "HOME"; + configFile2 = homeDir + "/.nixpkgs/config.nix"; + in + if configFile != "" && pathExists configFile then import configFile + else if homeDir != "" && pathExists configFile2 then import configFile2 + else {} + +, ... +} @ args: + +import ./. (args // { inherit system config; }) |