Build the frontend once per pipeline and reuse it in the dev backend image [CI]

ci/shared-web.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+# 同一条流水线里，前端只构建一次：web-build workflow 构建完把 dist 放到流水线的共享目录，开发镜像的 Backend 步骤直接拿来用。
+# 用法：
+#   shared-web.sh publish   把 web/display/dist 和 web/admin/dist 放进共享目录（先写临时目录，最后用一次 rename 加上 ready 标记）
+#   shared-web.sh fetch     等 ready 标记出现（最多 MOSHIRO_SHARED_WEB_WAIT 秒，默认 600），再复制回工作区；
+#                           退出码 0 = 已复制，1 = 没等到或流水线已经失败（调用方自己构建兜底）
+# 共享目录和 ci/guard-step.py 用的是同一个：${MOSHIRO_CI_STATE}/${CI_REPO_ID}-${CI_PIPELINE_NUMBER}。
+set -euo pipefail
+
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+state="${MOSHIRO_CI_STATE:-/home/justme/woodpecker/cache/pipeline-state}/${CI_REPO_ID:-0}-${CI_PIPELINE_NUMBER:-0}"
+shared="$state/web-dist"
+apps=(display admin)
+
+case "${1:-}" in
+  publish)
+    mkdir -p "$state"
+    tmp="$state/web-dist.tmp.$$"
+    rm -rf "$tmp" "$shared"
+    for app in "${apps[@]}"; do
+      [[ -f "$root/web/$app/dist/index.html" ]] || { echo "web/$app/dist is missing" >&2; exit 1; }
+      mkdir -p "$tmp/$app"
+      cp -a "$root/web/$app/dist/." "$tmp/$app/"
+    done
+    mv "$tmp" "$shared"
+    ;;
+  fetch)
+    deadline=$((SECONDS + ${MOSHIRO_SHARED_WEB_WAIT:-600}))
+    until [[ -f "$shared/display/index.html" && -f "$shared/admin/index.html" ]]; do
+      if [[ -e "$state/failed" ]]; then echo "the pipeline already failed; no shared web build" >&2; exit 1; fi
+      if ((SECONDS >= deadline)); then echo "the shared web build did not appear in time" >&2; exit 1; fi
+      sleep 2
+    done
+    for app in "${apps[@]}"; do
+      rm -rf "$root/web/$app/dist"
+      mkdir -p "$root/web/$app/dist"
+      cp -a "$shared/$app/." "$root/web/$app/dist/"
+    done
+    ;;
+  *)
+    echo "usage: shared-web.sh publish|fetch" >&2
+    exit 2
+    ;;
+esac