nixos-container-shell -> nixos-container { login | root-shell }

nixos/modules/virtualisation/containers.nix

@@ -14,57 +14,13 @@ let
     installPhase = "true";
   };
 
-  nixos-container-shell = pkgs.writeScriptBin "nixos-container-shell"
-    ''
-      #! ${pkgs.bash}/bin/sh -e
-
-      usage() {
-        echo "Usage: $0 <container-name>" >&2
-        echo "       $0 (-r|--root-shell) <container-name>" >&2
-      }
-
-      args="`getopt --options 'r' -l help -- "$@"`"
-      eval "set -- $args"
-      rootShell=
-      while [ $# -gt 0 ]; do
-        case "$1" in
-          (--help) usage; exit 0;;
-          (-r|--root-shell) rootShell=1;;
-          (--) shift; break;;
-          (*) break;;
-        esac
-        shift
-      done
-
-      container="$1"
-      if [ -z "$container" ]; then
-        usage
-        exit 1
-      fi
-      shift
-
-      root="/var/lib/containers/$container"
-      if ! [ -d "$root" ]; then
-        echo "$0: container ‘$container’ does not exist" >&2
-        exit 1
-      fi
-
-      if [ -n "$rootShell" ]; then
-        socket="$root/var/lib/root-shell.socket"
-      else
-        socket="$root/var/lib/login.socket"
-      fi
-      if ! [ -S "$socket" ]; then
-        echo "$0: socket ‘$socket’ does not exist" >&2
-        exit 1
-      fi
-
-      if [ -n "$rootShell" ]; then
-        exec ${pkgs.socat}/bin/socat "unix:$socket" -
-      else
-        exec ${pkgs.socat}/bin/socat "unix:$socket" -,echo=0,raw
-      fi
-    '';
+  nixos-container = pkgs.substituteAll {
+    name = "nixos-container";
+    dir = "bin";
+    isExecutable = true;
+    src = ./nixos-container.sh;
+    inherit (pkgs) bash socat;
+  };
 
 in
 
@@ -299,7 +255,7 @@ in
         ${cfg.localAddress} ${name}.containers
       '') config.containers);
 
-    environment.systemPackages = optional (config.containers != {}) nixos-container-shell;
+    environment.systemPackages = optional (config.containers != {}) nixos-container;
 
   };
 }

nixos/modules/virtualisation/nixos-container.sh

@@ -0,0 +1,54 @@
+#! @bash@/bin/sh -e
+
+usage() {
+    echo "Usage: $0 login <container-name>" >&2
+    echo "       $0 root-shell <container-name>" >&2
+}
+
+args="`getopt --options '' -l help -- "$@"`"
+eval "set -- $args"
+while [ $# -gt 0 ]; do
+    case "$1" in
+        (--help) usage; exit 0;;
+        (--) shift; break;;
+        (*) break;;
+    esac
+    shift
+done
+
+action="$1"
+if [ -z "$action" ]; then usage; exit 1; fi
+shift
+
+getContainerRoot() {
+    root="/var/lib/containers/$container"
+    if ! [ -d "$root" ]; then
+        echo "$0: container ‘$container’ does not exist" >&2
+        exit 1
+    fi
+}
+
+if [ $action = login ]; then
+
+    container="$1"
+    if [ -z "$container" ]; then usage; exit 1; fi
+    shift
+
+    getContainerRoot
+
+    exec @socat@/bin/socat "unix:$root/var/lib/login.socket" -,echo=0,raw
+
+elif [ $action = root-shell ]; then
+
+    container="$1"
+    if [ -z "$container" ]; then usage; exit 1; fi
+    shift
+
+    getContainerRoot
+
+    exec @socat@/bin/socat "unix:$root/var/lib/root-shell.socket" -
+
+else
+    echo "$0: unknown action ‘$action’" >&2
+    exit 1
+fi