Write an update archive with only the files changed since the last publish

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

publish.sh

@@ -5,7 +5,9 @@
 # files, so the second publish only adds what the first lacks. The target
 # machine needs no .NET install. Use publish-windows.sh or publish-linux.sh, or
 # pass the runtime id, for example win-arm64 (the bridge and XMMT.ocx are 32
-# bit x86 either way).
+# bit x86 either way). When an archive from an earlier run exists, a second
+# archive, dist/nonemm-<rid>-update, holds only the files that are new or
+# changed since then, for unpacking over the old install.
 rid="${1:?usage: publish.sh <runtime id>}"
 cd "$(dirname "$0")" || exit 1
 name="nonemm-$rid"
@@ -13,20 +15,38 @@ out="dist/$name"
 mkdir -p dist
 rm -rf "$out"
 
+case "$rid" in
+    win-*) extension=zip ;;
+    *) extension=tar.gz ;;
+esac
+archive="dist/$name.$extension"
+update="dist/$name-update.$extension"
+
+# the full archive is replaced below, so keep the old one to compare against
+previous=""
+if [ -f "$archive" ]; then
+    previous="dist/$name.previous.$extension"
+    cp "$archive" "$previous" || exit 1
+fi
+
 for project in Nonemm.App Nonemm.Recorder.App; do
     ./build.sh publish "src/$project" -c Release -r "$rid" --self-contained -o "$out" || exit 1
 done
 rm -f "$out"/*.pdb
 
-case "$rid" in
-    win-*)
-        rm -f "dist/$name.zip"
+case "$extension" in
+    zip)
         python3 -c 'import shutil, sys; shutil.make_archive(sys.argv[1], "zip", "dist", sys.argv[2])' \
             "$out" "$name" || exit 1
-        echo "dist/$name.zip"
         ;;
     *)
-        tar -C dist -czf "dist/$name.tar.gz" "$name" || exit 1
-        echo "dist/$name.tar.gz"
+        tar -C dist -czf "$archive" "$name" || exit 1
         ;;
 esac
+echo "$archive"
+
+rm -f "$update"
+if [ -n "$previous" ]; then
+    python3 "$(dirname "$0")/publish-update.py" "$previous" "$out" "$update" || exit 1
+    rm -f "$previous"
+fi