Refactor bootstrap script for SwarmUI management and enhance error handling

- Introduced functions `swarm_git_ok`, `clone_swarmui`, and `update_swarmui` to streamline the cloning and updating process of SwarmUI.
- Improved error handling during the update process, ensuring a fallback to cloning if the update fails.
- Enhanced logging messages for better visibility during cloning and updating operations.
- Updated tests to verify the presence of new functions and logging messages in the bootstrap script.

src/gpu_rent/remote/bootstrap.sh

@@ -127,16 +127,30 @@ fi
 
 rm -f "${DATA_ROOT}/.gpu-rent-llm-only" 2>/dev/null || true
 
-if [[ ! -d "${SWARM_ROOT}/.git" ]]; then
-  log "clone SwarmUI -> ${SWARM_ROOT}"
+swarm_git_ok() {
+  # .git dir can exist after a failed/partial boot and still not be a repo.
+  [[ -d "${SWARM_ROOT}/.git" ]] \
+    && git -C "$SWARM_ROOT" rev-parse --is-inside-work-tree >/dev/null 2>&1
+}
+
+clone_swarmui() {
   mkdir -p "$(dirname "$SWARM_ROOT")"
+  if [[ -e "$SWARM_ROOT" ]]; then
+    log "удаляю битый/неполный ${SWARM_ROOT} перед clone"
+    rm -rf "$SWARM_ROOT"
+  fi
+  log "clone SwarmUI -> ${SWARM_ROOT}"
   git clone --depth 1 "$SWARM_REPO" "$SWARM_ROOT"
-elif [[ "${GPU_RENT_UPDATE_GIT:-1}" == "1" ]]; then
-  log "обновляю SwarmUI в ${SWARM_ROOT}"
+}
+
+update_swarmui() {
+  local branch
   branch="$(git -C "$SWARM_ROOT" remote show origin 2>/dev/null | sed -n '/HEAD branch/s/.*: //p' || true)"
   branch="${branch:-master}"
   # shallow clone: deepen tip of default branch
-  git -C "$SWARM_ROOT" fetch --depth 1 origin "$branch" || git -C "$SWARM_ROOT" fetch --depth 1 origin
+  git -C "$SWARM_ROOT" fetch --depth 1 origin "$branch" \
+    || git -C "$SWARM_ROOT" fetch --depth 1 origin \
+    || return 1
   if git -C "$SWARM_ROOT" rev-parse --verify -q "origin/${branch}" >/dev/null; then
     git -C "$SWARM_ROOT" checkout -B "$branch" "origin/${branch}"
     git -C "$SWARM_ROOT" reset --hard "origin/${branch}"
@@ -144,6 +158,16 @@ elif [[ "${GPU_RENT_UPDATE_GIT:-1}" == "1" ]]; then
     git -C "$SWARM_ROOT" pull --ff-only || true
   fi
   log "SwarmUI @ $(git -C "$SWARM_ROOT" rev-parse --short HEAD)"
+}
+
+if ! swarm_git_ok; then
+  clone_swarmui
+elif [[ "${GPU_RENT_UPDATE_GIT:-1}" == "1" ]]; then
+  log "обновляю SwarmUI в ${SWARM_ROOT}"
+  if ! update_swarmui; then
+    log "WARN: git update failed (exit $?) — переклонирую"
+    clone_swarmui
+  fi
 else
   log "SwarmUI уже в ${SWARM_ROOT} (update off)"
 fi