move min-list-garbage into min-collect-garbage pkg

we don't want it in the same package as min-copy-closure as
that depends on bash

pkgs/default.nix

@@ -46,6 +46,7 @@
   openwrt = callPackage ./openwrt {};
 
   initramfs-peek = callPackage ./initramfs-peek {};
+  min-collect-garbage = callPackage ./min-collect-garbage {};
   min-copy-closure = callPackage ./min-copy-closure {};
   hi = callPackage ./hi {};
 }

pkgs/min-collect-garbage/default.nix

@@ -0,0 +1,17 @@
+{
+  stdenv
+, nix
+, cpio
+, openssh
+}: stdenv.mkDerivation {
+  name = "min-collect-garbage";
+  buildInputs = [ ];
+#  propagatedBuildInputs = [ openssh ];
+  src = ./.;
+  makeFlags = [ "min-list-garbage" ];
+  installPhase = ''
+    mkdir -p $out/bin
+    cp  min-collect-garbage.sh $out/bin/min-collect-garbage
+    cp min-list-garbage $out/bin
+  '';
+}

pkgs/min-collect-garbage/min-collect-garbage.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+test -f /persist/nix-store-paths || exit 1
+(cd /nix/store && min-list-garbage /persist/nix-store-paths | xargs rm -r)

pkgs/min-collect-garbage/min-list-garbage.c

@@ -19,7 +19,6 @@ int add_list_entry(char *name)
 	hash_list = realloc(hash_list, hash_list_size * sizeof(hash_t));
     }
     strncpy(hash_list[hash_list_entries++], name, 32);
-    printf("%d %d\n", hash_list_entries, hash_list_size);
 }
 
 int read_list(char *filename)

pkgs/min-copy-closure/default.nix

@@ -8,13 +8,11 @@
   buildInputs = [ ];
   propagatedBuildInputs = [ cpio openssh nix ];
   src = ./.;
-  makeFlags = [ "min-list-garbage" ];
   installPhase = ''
     mkdir -p $out/bin
     for i in min-copy-closure liminix-rebuild; do
       echo $i
       cp ''${i}.sh $out/bin/$i
     done
-    cp min-list-garbage $out/bin
   '';
 }