scripts/deploy: avoid ssh-based copies to self

scripts/deploy

@@ -1,6 +1,8 @@
 #!/usr/bin/env nix-shell
 #!nix-shell -i bash -p nettools
 
+SELF=$(hostname)
+
 usage() {
   echo "deploy: deploy a nix config to a remote machine, possibly activating it"
   echo ""
@@ -20,7 +22,7 @@ info() {
 }
 
 action=switch
-host=$(hostname)
+host="$SELF"
 variant=
 nixArgs=()
 parseArgs() {
@@ -61,9 +63,11 @@ parseArgs() {
 runOnTarget() {
   # run the command ($@) on the machine we're deploying to.
   # if that's a remote machine, then do it via ssh, else local shell.
-  if [ -n "$addr" ]; then
-    ssh "$addr" "$@"
+  if [ -n "$host" ] && [ "$host" != "$SELF" ]; then
+    info "running on remote:" "$@"
+    ssh "$host" "$@"
   else
+    info "running locally:" "$@"
     "$@"
   fi
 }
@@ -87,7 +91,7 @@ deployOneHost() {
   # - more introspectability and debuggability
   # - sandbox friendliness (especially: `git` doesn't have to be run as root)
 
-  if [ -n "$host" ]; then
+  if [ -n "$host" ] && [ "$host" != "$SELF" ]; then
     if [ -e /run/secrets/nix_signing_key ]; then
       info "signing store paths ..."
       sudo nix store sign -r -k /run/secrets/nix_signing_key "$storePath"