drop i686 support without simplifying code

CHANGELOG.md

@@ -11,6 +11,7 @@
 ## Removed Options
 
 * The `system.workaround.make-posix-spawn.enable` has been removed.
+* i686 support has been removed.
 
 ## Release 21.05
 

README.md

@@ -26,17 +26,18 @@ This repository contains:
    on the device.
 
 It is only tested with aarch64 (64-bit ARM devices).
-It may also support x86 devices, but the developers don't own one
-and nobody has reported whether it actually works or not.
-
+It also used to compile for i686 devices, but the developers don't own any
+and nobody has reported whether it actually worked or not,
+so it's no longer built unless a user shows up.
 Sorry, it would not work on 32-bit ARM devices
 and it's not an easy feat to pull off.
 
 
 ## Try it out
 
-Prebuilt stuff resides at https://nix-on-droid.unboiled.info
-Install the APK, launch the app, press OK.
+[Install it from F-Droid](https://f-droid.org/packages/com.termux.nix),
+launch the app, press OK,
+expect many hundreds megabytes of downloads to happen.
 
 
 ## `nix-on-droid` and the module system
@@ -123,10 +124,9 @@ is probably not interesting for you, just download and use a prebuilt one.
 If you really want to rebuild it, you can just use Android Studio for that.
 
 The zipball generation is probably what you are after.
-Get an x86_64 computer with Nix. Run one of the following:
+Get an x86_64 computer with Nix. Run
 ```
 nix build -f ./pkgs --argstr arch aarch64 bootstrapZip
-nix build -f ./pkgs --argstr arch i686 bootstrapZip
 ```
 
 Put the zip file from `result` on some HTTP server

build.sh

@@ -68,8 +68,7 @@
 
 set -e
 
-arches=${arches:-aarch64 i686}
-# If you only care about aarch64, run as `arches=aarch64 ./build.sh`.
+arches=${arches:-aarch64}  # whitespace-separated list of architectures to build
 
 # Create/clear the output directory.
 mkdir -p out

ci.nix

@@ -8,7 +8,7 @@ let
   pkgs = import ./pkgs;
 
   attrs = genAttrs
-    [ "aarch64" "i686" ]
+    [ "aarch64" ]
     (arch: (pkgs { inherit arch; }) // { recurseForDerivations = true; });
 
   isCacheable = p: !(p.preferLocalBuild or false);

flake.nix

@@ -39,7 +39,7 @@
         };
     }
     // flake-utils.lib.eachSystem
-      [ "aarch64-linux" "i686-linux" ]
+      [ "aarch64-linux" ]
       (system: {
         apps.nix-on-droid = appPerSystem system;
         defaultApp = appPerSystem system;

modules/build/config.nix

@@ -12,8 +12,8 @@ with lib;
 
     build = {
       arch = mkOption {
-        type = types.enum [ "aarch64" "i686" ];
-        default = if pkgs.stdenv.isAarch64 then "aarch64" else "i686";
+        type = types.enum [ "aarch64" ];
+        default = "aarch64";
         internal = true;
         description = "Destination arch.";
       };

modules/environment/login/default.nix

@@ -86,7 +86,6 @@ in
         let
           crossCompiledPaths = {
            aarch64 = "/nix/store/dapbgzbpl426jrhz4a2sdl096a8l98ad-proot-termux-aarch64-unknown-linux-android-unstable-2021-11-21";
-           i686 = "/nix/store/6nnjhrh8pgyxjnya72irahxpkbnxai1w-proot-termux-i686-unknown-linux-android-unstable-2021-11-21";
           };
         in
           "${crossCompiledPaths.${config.build.arch}}";

pkgs/nix-directory.nix

@@ -28,7 +28,6 @@ stdenv.mkDerivation {
       let
         archShas = {
          aarch64 = "1hl6pd02nssscn32mrndif2fxfssxiarrpjvqyjicwnz6yn9mhpq";
-         i686 = "0249sbmgmi7cah099wywlqx3ygwpjgl6vcyivqix9rwpnpap417x";
         };
       in
         "${archShas.${config.build.arch}}";