From 4a0b00ed4ffc46486d50cd855e797300a29eddc9 Mon Sep 17 00:00:00 2001
From: catvayor <catvayor@katvayor.net>
Date: Tue, 1 Oct 2024 16:43:53 +0200
Subject: [PATCH] begin minimization of systemd

trivial part
---
 overlay.nix | 160 ++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 111 insertions(+), 49 deletions(-)

diff --git a/overlay.nix b/overlay.nix
index 74327e2..1e9b150 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -259,7 +259,12 @@ extraPkgs // {
     patches = o.patches ++ [
       ./pkgs/qemu/arm-image-friendly-load-addr.patch
     ];
-  }); in q.override { nixosTestRunner = true; sdlSupport = false; hostCpuTargets = [ "mips-softmmu" ]; };
+  }); in q.override {
+    vde2 = null;
+    nixosTestRunner = true;
+    sdlSupport = false;
+    hostCpuTargets = [ "mips-softmmu" ];
+  };
 
   rsyncSmall =
     let r = prev.rsync.overrideAttrs(o: {
@@ -330,54 +335,111 @@ extraPkgs // {
       };
     }) { };
 
-  systemd = prev.systemd.override {
-    withAcl = false;
-    withAnalyze = false;
-    withApparmor = false;
-    withAudit = false;
-    withBootloader = false;
-    # withCompression = true;
-    withCoredump = false;
-    withCryptsetup = false;
-    withRepart = false;
-    withDocumentation = false;
-    withEfi = false;
-    withFido2 = false;
-    withHomed = false;
-    # withHostnamed = true;
-    withHwdb = false;
-    withImportd = false;
-    withIptables = false;
-    withKmod = false;
-    withLibBPF = false;
-    withLibidn2 = false;
-    withLocaled = false;
-    withLogind = false;
-    withMachined = false;
-    withNetworkd = false;
-    withNss = false;
-    withOomd = false;
-    withPam = false;
-    withPasswordQuality = false;
-    withPCRE2 = false;
-    withPolkit = false;
-    withPortabled = false;
-    withQrencode = false;
-    withRemote = false;
-    withResolved = false;
-    # withShellCompletions = true;
-    # withSysusers = true;
-    withSysupdate = false;
-    # withTimedated = true;
-    # withTimesyncd = true;
-    withTpm2Tss = false;
-    withUkify = false;
-    withUserDb = false;
-    withUtmp = false;
-    withVmspawn = false;
-    withKernelInstall = false;
-    withLibarchive = false;
-  };
+  systemd =
+    let base = prev.systemd.override {
+      withAcl = false;
+      withAnalyze = false;
+      withApparmor = false;
+      withAudit = false;
+      withBootloader = false;
+      withCompression = false;
+      withCoredump = false;
+      withCryptsetup = false;
+      withRepart = false;
+      withDocumentation = false;
+      withEfi = false;
+      withFido2 = false;
+      withHomed = false;
+      withHostnamed = false;
+      withHwdb = false;
+      withImportd = false;
+      withIptables = false;
+      withKmod = false;
+      withLibBPF = false;
+      withLibidn2 = false;
+      withLocaled = false;
+      withLogind = false;
+      withMachined = false;
+      withNetworkd = false;
+      withNss = false;
+      withOomd = false;
+      withPam = false;
+      withPasswordQuality = false;
+      withPCRE2 = false;
+      withPolkit = false;
+      withPortabled = false;
+      withQrencode = false;
+      withRemote = false;
+      withResolved = false;
+      withShellCompletions = false;
+      withSysusers = false;
+      withSysupdate = false;
+      withTimedated = false;
+      withTimesyncd = false;
+      withTpm2Tss = false;
+      withUkify = false;
+      withUserDb = false;
+      withUtmp = false;
+      withVmspawn = false;
+      withKernelInstall = false;
+      withLibarchive = false;
+    };
+    in base.overrideAttrs (o: {
+      mesonFlags = o.mesonFlags ++ [
+      #  "--optimization=s"
+        "--default-library=static"
+        "--buildtype=minsize"
+      ];
+      postInstall = o.postInstall + ''
+        rm -rf $out/share
+        rm $out/lib/libudev.so*
+        rm -rf $out/lib/systemd/catalog
+        rm -rf $out/lib/systemd/system-generators
+        rm $out/lib/systemd/systemd-backlight
+        rm $out/lib/systemd/systemd-battery-check
+        rm $out/lib/systemd/systemd-hibernate-resume
+        rm $out/lib/systemd/systemd-makefs
+        rm $out/lib/systemd/systemd-nsresourced
+        rm $out/lib/systemd/systemd-nsresourcework
+        rm $out/lib/systemd/systemd-shutdown
+        rm $out/lib/systemd/systemd-sleep
+        rm $out/lib/systemd/systemd-binfmt
+        rm $out/lib/systemd/systemd-growfs
+        rm $out/lib/systemd/systemd-mountfsd
+        rm $out/lib/systemd/systemd-mountwork
+        rm $out/lib/systemd/systemd-network-generator
+        rm $out/lib/systemd/systemd-pstore
+        rm $out/lib/systemd/systemd-remount-fs
+        rm $out/lib/systemd/systemd-reply-password
+        rm $out/lib/systemd/systemd-rfkill
+        rm $out/lib/systemd/systemd-socket-proxyd
+        rm $out/lib/systemd/systemd-ssh-proxy
+        rm $out/lib/systemd/systemd-storagetm
+        rm $out/lib/systemd/systemd-volatile-root
+        rm $out/lib/systemd/systemd-xdg-autostart-condition
+        rm -rf $out/example
+        rm $out/bin/bootctl
+        rm $out/bin/systemd-nspawn
+        rm $out/bin/systemd-ac-power
+        rm $out/bin/systemd-dissect
+        rm $out/bin/systemd-ask-password
+        rm $out/bin/systemd-cgls
+        rm $out/bin/systemd-cgtop
+        rm $out/bin/systemd-creds
+        rm $out/bin/systemd-delta
+        rm $out/bin/systemd-detect-virt
+        rm $out/bin/systemd-escape
+        rm $out/bin/systemd-id128
+        rm $out/bin/systemd-machine-id-setup
+        rm $out/bin/systemd-path
+        rm $out/bin/systemd-run
+        rm $out/bin/systemd-socket-activate
+        rm $out/bin/systemd-stdio-bridge
+        rm $out/bin/systemd-sysext
+        rm $out/bin/systemd-tty-ask-password-agent
+        rm $out/bin/systemd-vpick
+      '';
+    });
 
   ubootQemuAarch64 = final.buildUBoot {
     defconfig = "qemu_arm64_defconfig";