scripts/deploy: add the equivalent of my "pre-deploy" functionality

scripts/deploy

@@ -8,8 +8,12 @@ usage() {
   echo ""
   echo "usage: deploy [options] [host]"
   echo "options:"
-  echo "- --action switch|test"
+  echo "- --action copy|switch|test   (default: 'switch')"
-  echo "- --variant light|min"
+  echo "- --variant light|min|''|all  (default: '')"
+  echo "- --pre: alias for --action copy --variant all all"
+  echo ""
+  echo "common idioms:"
+  echo "deploy all: deploy all hosts, sequentially"
   exit 1
 }
 
@@ -40,6 +44,11 @@ parseArgs() {
       (crappy|desko|lappy|moby|servo)
         host="$arg"
         ;;
+      (--pre)
+        action=copy
+        host=all
+        variant=all
+        ;;
       (*)
         nixArgs+=("$arg")
         ;;
@@ -57,7 +66,10 @@ runOnTarget() {
   fi
 }
 
-parseArgs "$@"
+# deployOneHost $host $variant
+deployOneHost() {
+  local host="$1"
+  local variant="$2"
 
   nix-build -A "hosts.$host$variant" --out-link "./build/result-$host$variant" "${nixArgs[@]}"
   storePath="$(readlink ./build/result-$host$variant)"
@@ -83,7 +95,24 @@ if [ -n "$host" ]; then
     nix copy -vv --option builders-use-substitutes false --to "ssh-ng://$host" "$storePath"
   fi
 
-if [ -n "$action" ]; then
+  if [ -n "$action" ] && [ "$action" != "copy" ]; then
     runOnTarget sudo nix-env -p /nix/var/nix/profiles/system --set "$storePath"
     runOnTarget sudo "$storePath/bin/switch-to-configuration" "$action"
   fi
+}
+
+parseArgs "$@"
+
+if [ "$host" = "all" ]; then
+  for host in moby lappy crappy servo desko; do
+    if [ "$variant" = "all" ]; then
+      for variant in -min -light ""; do
+        deployOneHost "$host" "$variant"
+      done
+    else
+      deployOneHost "$host" "$variant"
+    fi
+  done
+else
+  deployOneHost "$host" "variant"
+fi