♻ (flatpak-sync) Put code in own method

The new method sync is at this point always called

flatpak-sync/flatpak-sync.sh

@@ -9,27 +9,31 @@ set -euo pipefail
 
 APPS_LIST_PATH="${APPS_LIST_PATH:=$HOME/.config/flatpak-sync/apps.list}"
 
-readarray -t requested_apps < <(cat "$APPS_LIST_PATH")
-readarray -t installed_apps < <(flatpak list --app --columns app | tail -n +1)
+function sync() {
+    readarray -t requested_apps < <(cat "$APPS_LIST_PATH")
+    readarray -t installed_apps < <(flatpak list --app --columns app | tail -n +1)
 
-declare -a requested_apps_cleaned=()
+    declare -a requested_apps_cleaned=()
 
-echo "Checking for apps to install."
-for app in "${requested_apps[@]}"; do
-    if [[ -z "$app" ]] || [[ "$app" =~ ^#.* ]]; then
-        continue
-    fi
-    requested_apps_cleaned+=("$app")
-    if [[ ! "${installed_apps[*]}" =~ "${app}" ]]; then
-        echo "$app not installed. Installing it."
-        flatpak install -y "$app"
-    fi
-done
+    echo "Checking for apps to install."
+    for app in "${requested_apps[@]}"; do
+        if [[ -z "$app" ]] || [[ "$app" =~ ^#.* ]]; then
+            continue
+        fi
+        requested_apps_cleaned+=("$app")
+        if [[ ! "${installed_apps[*]}" =~ "${app}" ]]; then
+            echo "$app not installed. Installing it."
+            flatpak install -y "$app"
+        fi
+    done
 
-echo "Checking for apps to remove."
-for app in "${installed_apps[@]}"; do
-    if [[ ! "${requested_apps_cleaned[*]}" =~ "${app}" ]]; then
-        echo "$app no found in apps list. Removing it.";
-        flatpak uninstall -y "$app"
-    fi
-done
+    echo "Checking for apps to remove."
+    for app in "${installed_apps[@]}"; do
+        if [[ ! "${requested_apps_cleaned[*]}" =~ "${app}" ]]; then
+            echo "$app no found in apps list. Removing it.";
+            flatpak uninstall -y "$app"
+        fi
+    done
+}
+
+sync