tool: Enable updating apps automatically

tool/update.sh

@@ -2,6 +2,16 @@
 set -euxo pipefail
 cd "$(dirname "$0")/.."
 
+function update_app() {
+    name="$1"
+    (
+      cd "external/nextcloud-$name"
+      git fetch --tags
+      latest_tag="$(git tag --sort=v:refname | grep -vi "rc" | grep -vi "alpha" | grep -vi "beta" | tail -n 1)"
+      git reset --hard "$latest_tag"
+    )
+}
+
 if [[ "$1" == "flutter" ]]; then
   flutter_channel="stable"
   flutter_version="$(curl https://raw.githubusercontent.com/fluttertools/fvm/main/releases_linux.json | jq -r "[.releases[] | select(.channel==\"$flutter_channel\")][0].version")"
@@ -15,6 +25,8 @@ if [[ "$1" == "flutter" ]]; then
   find ./packages -name "pubspec.yaml" -exec sed -i "s/flutter: '>=.*'/flutter: '>=$flutter_version'/" {} \;
   find ./packages -name "pubspec.yaml" -exec sed -i "s/sdk: '>=.* <.*'/sdk: '>=$dart_version_major.$dart_version_minor.0 <$dart_version_next_major.0.0'/" {} \;
   fvm exec mono_repo pub get
+elif [ -d "external/nextcloud-$1" ]; then
+    update_app "$1"
 else
   echo "$1 not found"
   exit 1