update

deploy/lxc/install.sh

@@ -98,12 +98,24 @@ log "Installing Python dependencies (this takes a minute)"
 chown -R "$SVC_USER:$SVC_USER" "$APP_DIR"
 
 # --- Configuration --------------------------------------------------------
+# --- Configuration --------------------------------------------------------
+# Prefer a filled-in .env if one exists, otherwise fall back to the template.
+ENV_SRC=""
+for candidate in "$SRC_DIR/.env" "$SRC_DIR/.env.example"; do
+  [[ -f "$candidate" ]] && { ENV_SRC="$candidate"; break; }
+done
+[[ -n "$ENV_SRC" ]] || die "Can't find $SRC_DIR/.env or $SRC_DIR/.env.example to seed the config from."
+
 mkdir -p "$CONF_DIR"
-if [[ ! -f "$CONF_DIR/env" ]]; then
-  log "Creating $CONF_DIR/env from the template"
+# An empty file counts as "not configured" -- a previous failed run can leave
+# a zero-byte config behind, and silently keeping it is worse than replacing it.
+if [[ ! -s "$CONF_DIR/env" ]]; then
+  log "Creating $CONF_DIR/env from $(basename "$ENV_SRC")"
   # systemd EnvironmentFile does not understand quotes or inline comments the
-  # way a shell does, so strip comments and blank lines out of the example.
-  grep -vE '^\s*(#|$)' "$SRC_DIR/.env.example" > "$CONF_DIR/env"
+  # way a shell does, so strip comments and blank lines out of the source.
+  # Write to a temp file first so a failure here can't leave an empty config.
+  grep -vE '^\s*(#|$)' "$ENV_SRC" > "$CONF_DIR/env.tmp"
+  mv "$CONF_DIR/env.tmp" "$CONF_DIR/env"
   NEW_CONFIG=1
 else
   log "Keeping existing $CONF_DIR/env"