Clean up some path shenanigans

linuxkit-builder/default.nix

@@ -25,6 +25,9 @@
 , vmTools
 , makeInitrd
 , shellcheck
+, coreutils
+, openssh
+, gnutar
 , linuxkitKernel ? (forceSystem "x86_64-linux" "x86_64").callPackage ./kernel.nix { }
 , storeDir ? builtins.storeDir
 
@@ -130,6 +133,8 @@ let
 
       Exit this VM by running:
           kill $(cat ~/.nixpkgs/linuxkit-builder/nix-state/hyperkit.pid)
+
+      Or, in this terminal, type 'stop'.
       ======================================================================
     '';
 
@@ -243,7 +248,8 @@ let
     ];
   };
 in shellcheckedScriptBin "linuxkit-builder" ./ui.sh {
-  inherit bash hostPort vpnkit hyperkit linuxkit containerIp;
+  inherit bash hostPort vpnkit hyperkit linuxkit containerIp coreutils
+    openssh gnutar;
 
   boot_files = runCommand "linuxkit-kernel-files" {
     kernel_path = "${linuxkitKernel}/${img}";

linuxkit-builder/ui.sh

@@ -1,5 +1,6 @@
-#!@bash@/bin/bash -eu
+#!@bash@/bin/bash -eux
 
+PATH=@coreutils@/bin:@openssh@/bin:@gnutar@/bin
 BOOT_FILES=@boot_files@
 HOST_PORT=@hostPort@
 INTEGRATED_PATH=@integrated_path@
@@ -51,8 +52,11 @@ if [ ! -d "$DIR/keys" ]; then
 fi
 
 cp "$INTEGRATED_PATH" "$DIR/integrated.sh"
+chmod u+w "$DIR/integrated.sh"
 chmod +x "$DIR/integrated.sh"
+
 cp "$EXAMPLE_PATH" "$DIR/example.nix"
+chmod u+w "$DIR/example.nix"
 
 cat <<EOF > "$DIR/ssh-config"
 Host nix-linuxkit
@@ -100,10 +104,20 @@ EOF
 
 chmod +x "$DIR/finish-setup.sh"
 
-PATH="$VPNKIT_ROOT/bin:$PATH"
-exec "$LINUXKIT_ROOT/bin/linuxkit" run \
+function finish {
+    if [ -f "$DIR/nix-state/hyperkit.pid" ]; then
+        # yeah, yeah, /usr/bin
+        /usr/bin/pkill -F ~/.nixpkgs/linuxkit-builder/nix-state/hyperkit.pid hyperkit
+    fi
+    echo bye
+}
+trap finish EXIT
+
+
+"$LINUXKIT_ROOT/bin/linuxkit" run \
   hyperkit \
-  -hyperkit "$HYPERKIT_ROOT/bin/hyperkit" "$@" \
+  -hyperkit "$HYPERKIT_ROOT/bin/hyperkit" \
+  -vpnkit "$VPNKIT_ROOT/bin/vpnkit" \
   -networking vpnkit \
   -ip "$CONTAINER_IP" \
   -disk "$DIR/nix-disk,size=$SIZE" \