From 38b17aa9d5389db4914b967dfd059d949b839afb Mon Sep 17 00:00:00 2001
From: Alexander Sosedkin <monk@unboiled.info>
Date: Sun, 7 Jul 2024 23:42:33 +0200
Subject: [PATCH] WIP: login-inner: get rid of gnused in flake bootstrap

---
 modules/environment/login/login-inner.nix | 33 ++++++++++++++++-------
 tests/emulator/bootstrap_flakes.py        |  4 +--
 2 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/modules/environment/login/login-inner.nix b/modules/environment/login/login-inner.nix
index 81d12a9b..bcc83fd6 100644
--- a/modules/environment/login/login-inner.nix
+++ b/modules/environment/login/login-inner.nix
@@ -3,7 +3,7 @@
 { config, lib, initialPackageInfo, writeText, targetSystem }:
 
 let
-  inherit (initialPackageInfo) cacert nix;
+  inherit (initialPackageInfo) cacert nix coreutils;
 
   nixCmd = "${nix}/bin/nix --extra-experimental-features 'flakes nix-command'";
 in
@@ -81,24 +81,37 @@ writeText "login-inner" ''
 
         ${lib.optionalString config.build.flake.inputOverrides ''
           echo "Overriding input urls in the flake..."
-          ${nixCmd} run nixpkgs#gnused -- \
-            -i \
-            -e 's,\"github:NixOS/nixpkgs.*\",\"${config.build.flake.nixpkgs}\",' \
-            -e 's,\"github:nix-community/nix-on-droid.*\",\"${config.build.flake.nix-on-droid}\",' \
-            "${config.user.home}/.config/nix-on-droid/flake.nix"
+          while IFS="" read -r p || [[ -n "$p" ]]
+          do
+              if [[ $p =~ (.*)github:NixOS/nixpkgs.*\"\; ]]; then
+                  printf "''${BASH_REMATCH[1]}${config.build.flake.nixpkgs}\";\n" "$p"
+              elif [[ $p =~ (.*)github:nix-community/nix-on-droid.*\"\; ]]; then
+                  printf "''${BASH_REMATCH[1]}${config.build.flake.nix-on-droid}\";\n" "$p"
+              else
+                  printf '%s\n' "$p"
+              fi
+          done <<<$(< "${config.user.home}/.config/nix-on-droid/flake.nix") \
+                    > "${config.user.home}/.config/nix-on-droid/flake.nix"
         ''}
 
         echo "Overriding system value in the flake..."
-        ${nixCmd} run nixpkgs#gnused -- \
-          -i \
-          -e 's,\"aarch64-linux",\"${targetSystem}\",' \
-          "${config.user.home}/.config/nix-on-droid/flake.nix"
+        while IFS="" read -r p || [[ -n "$p" ]]
+        do
+          if [[ $p =~ (.*)\"aarch64-linux\"(.*) ]]; then
+              printf "''${BASH_REMATCH[1]}\"${targetSystem}\"''${BASH_REMATCH[2]}\n" "$p"
+          else
+              printf '%s\n' "$p"
+          fi
+        done <<<$(< "${config.user.home}/.config/nix-on-droid/flake.nix") \
+                  > "${config.user.home}/.config/nix-on-droid/flake.nix"
 
         echo "Installing first Nix-on-Droid generation..."
         ${nixCmd} run ${config.build.flake.nix-on-droid} -- switch --flake ${config.user.home}/.config/nix-on-droid
 
         . "${config.user.home}/.nix-profile/etc/profile.d/nix-on-droid-session-init.sh"
 
+        rm -f "${config.user.home}/.config/nix-on-droid/flake.nix.tmp"
+
       fi
 
       echo
diff --git a/tests/emulator/bootstrap_flakes.py b/tests/emulator/bootstrap_flakes.py
index 8131d86f..ae944f47 100644
--- a/tests/emulator/bootstrap_flakes.py
+++ b/tests/emulator/bootstrap_flakes.py
@@ -40,8 +40,8 @@ def run(d):
     wait_for(d, 'Setting up Nix-on-Droid with flakes...')
 
     wait_for(d, 'Installing flake from default template...')
-    wait_for(d, 'Overriding system value in the flake...', timeout=600)
-    wait_for(d, 'Installing first Nix-on-Droid generation...')
+    wait_for(d, 'Overriding system value in the flake...')
+    wait_for(d, 'Installing first Nix-on-Droid generation...', timeout=180)
     wait_for(d, 'Building activation package', timeout=180)
     wait_for(d, 'Congratulations!', timeout=900)
     wait_for(d, 'bash-5.2$')