Implement edge-case handling for versioning

abra

@@ -419,6 +419,12 @@ require_vendor_dir() {
   mkdir -p "$ABRA_VENDOR_DIR"
 }
 
+require_consent_for_update() {
+  if [ "$CONSENT_TO_UPDATE" = "false" ]; then
+    error "A new app state will be deployed! Please use --update to consent"
+  fi
+}
+
 require_app_latest() {
   APP="$1"
   APP_DIR="$ABRA_DIR/apps/$APP"
@@ -496,6 +502,9 @@ load_abra_sh() {
 output_version_summary() {
   echo "  Versions:"
 
+  CONSENT_TO_UPDATE=$abra___update
+  IS_AN_UPDATE="false"
+
   IFS=':' read -ra COMPOSE_FILES <<< "$COMPOSE_FILE"
   for COMPOSE in "${COMPOSE_FILES[@]}"; do
     SERVICES=$($YQ e '.services | keys | .[]' "${APP_DIR}/${COMPOSE}")
@@ -517,10 +526,24 @@ output_version_summary() {
         app_version=${!app_version_lookup}
         app_digest_lookup="ABRA_TYPE_${SERVICE^^}_DIGEST"
         app_digest=${!app_digest_lookup}
-        echo "      to de deployed: $(tput setaf 3)$app_version ($app_digest)$(tput sgr0)"
+
+        if [ "$live_version" != "$app_version" ] || [ "$live_digest" != "$app_digest" ]; then
+          IS_AN_UPDATE="true"
+          echo "      to de deployed: $(tput setaf 1)$app_version ($app_digest)$(tput sgr0)"
+        fi
+
+      else
+        warning "Unable to detect deployed version of ${STACK_NAME}_${SERVICE}, please proceed with caution"
       fi
     done
   done
+
+  if [[ $IS_AN_UPDATE == "true" ]]; then
+    require_consent_for_update
+  else
+    success "Nothing to deploy, you're on latest"
+    exit 0
+  fi
 }
 
 ###### FIXME 3wc: name this section
@@ -1745,7 +1768,7 @@ abra() {
     abra__subcommands_ abra___skip_update abra___skip_check \
     abra__backup_file_ abra___verbose abra___debug abra___help \
     abra___branch abra___volumes abra__provider_ abra___type \
-    abra___dev
+    abra___dev abra___update
 
   if ! type tput > /dev/null 2>&1; then
     tput() {