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bootstrap: use env vars to set custom channel urls

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This commit is contained in:
Tobias Happ 2022-10-27 12:33:17 +02:00
parent bb8ac7fe1f
commit b01a2a8a57
2 changed files with 15 additions and 5 deletions
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4
README.md
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@ -137,7 +137,9 @@ To re-trigger the installation, you can use
If you want to change the nix-on-droid channel to your custom one, If you want to change the nix-on-droid channel to your custom one,
you can do that either with `nix-channel` after the installation, you can do that either with `nix-channel` after the installation,
or by using `--argstr nixOnDroidChannelURL <URL>`. or by setting the environment variable `NIX_ON_DROID_CHANNEL_URL`.
Other environment variables are `NIXPKGS_CHANNEL_URL` an
`NIX_ON_DROID_FLAKE_URL`.
**Note**: The `proot` binary is not built on the android device **Note**: The `proot` binary is not built on the android device
(NDK is required for building it, and it's not available on mobile platforms). (NDK is required for building it, and it's not available on mobile platforms).

16
pkgs/default.nix
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@ -14,6 +14,14 @@ let
pkgs = import nixpkgs { inherit system; }; pkgs = import nixpkgs { inherit system; };
urlOptionValue = url: envVar:
let
envValue = builtins.getEnv envVar;
in
pkgs.lib.mkIf
(envValue != "" || url != null)
(if url == null then envValue else url);
modules = import ../modules { modules = import ../modules {
inherit pkgs; inherit pkgs;
@ -29,15 +37,15 @@ let
# Fix invoking bash after initial build. # Fix invoking bash after initial build.
user.shell = "${initialPackageInfo.bash}/bin/bash"; user.shell = "${initialPackageInfo.bash}/bin/bash";
build = with pkgs.lib; { build = {
inherit arch; inherit arch;
channel = { channel = {
nixpkgs = mkIf (nixpkgsChannelURL != null) nixpkgsChannelURL; nixpkgs = urlOptionValue nixpkgsChannelURL "NIXPKGS_CHANNEL_URL";
nix-on-droid = mkIf (nixOnDroidChannelURL != null) nixOnDroidChannelURL; nix-on-droid = urlOptionValue nixOnDroidChannelURL "NIX_ON_DROID_CHANNEL_URL";
}; };
flake.nix-on-droid = mkIf (nixOnDroidFlakeURL != null) nixOnDroidFlakeURL; flake.nix-on-droid = urlOptionValue nixOnDroidFlakeURL "NIX_ON_DROID_FLAKE_URL";
}; };
}; };
}; };