implement darwin-rebuild flags

pkgs/nix-tools/darwin-rebuild.sh

@@ -5,13 +5,18 @@ export PATH=@path@:$PATH
 
 
 showSyntax() {
-  echo "$0: {build|switch}"
+  echo "darwin-rebuild [--help] {build | switch} [{--profile-name | -p} name]" >&2
+  echo "               [--verbose...] [-v...] [-Q] [{--max-jobs | -j} number] [--cores number]" >&2
+  echo "               [--keep-failed] [-K] [--fallback] [--show-trace] [-I path]" >&2
+  echo "               [--option name value] [--arg name value] [--argstr name value]" >&2
   exec man darwin-rebuild
   exit 1
 }
 
 # Parse the command line.
 origArgs=("$@")
+extraBuildFlags=()
+profile=@profile@
 action=
 
 while [ "$#" -gt 0 ]; do
@@ -23,6 +28,37 @@ while [ "$#" -gt 0 ]; do
     switch|build)
       action="$i"
       ;;
+    --show-trace|--no-build-hook|--keep-failed|-K|--verbose|-v|-vv|-vvv|-vvvv|-vvvvv|--fallback|-Q)
+      extraBuildFlags+=("$i")
+      ;;
+    --max-jobs|-j|--cores|-I)
+      if [ -z "$1" ]; then
+        echo "$0: ‘$i’ requires an argument"
+        exit 1
+      fi
+      j="$1"; shift 1
+      extraBuildFlags+=("$i" "$j")
+      ;;
+    --arg|--argstr|--option)
+      if [ -z "$1" -o -z "$2" ]; then
+        echo "$0: ‘$i’ requires two arguments"
+        exit 1
+      fi
+      j="$1"; shift 1
+      k="$1"; shift 1
+      extraBuildFlags+=("$i" "$j" "$k")
+      ;;
+    --profile-name|-p)
+      if [ -z "$1" ]; then
+        echo "$0: ‘--profile-name’ requires an argument"
+        exit 1
+      fi
+      if [ "$1" != system ]; then
+        profile="/nix/var/nix/profiles/system-profiles/$1"
+        mkdir -p -m 0755 "$(dirname "$profile")"
+      fi
+      shift 1
+      ;;
     *)
       echo "$0: unknown option \`$i'"
       exit 1
@@ -34,7 +70,7 @@ if [ -z "$action" ]; then showSyntax; fi
 
 echo "building the system configuration..." >&2
 if [ "$action" = switch -o "$action" = build ]; then
-  systemConfig="$(nix-build '<darwin>' --no-out-link -A system)"
+  systemConfig="$(nix-build '<darwin>' ${extraBuildFlags[@]} --no-out-link -A system)"
 fi
 
 if [ "$action" = build ]; then
@@ -43,12 +79,10 @@ fi
 
 
 if [ "$action" = switch ]; then
-  profileDir=$(dirname @profile@)
-
-  if [ "$USER" != root -a ! -w $profileDir ]; then
-    sudo nix-env -p @profile@ --set $systemConfig
+  if [ "$USER" != root -a ! -w $(dirname "$profile") ]; then
+    sudo nix-env -p $profile --set $systemConfig
   else
-    nix-env -p @profile@ --set $systemConfig
+    nix-env -p $profile --set $systemConfig
   fi
 
   if [ "$USER" != root ]; then