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part 5 修复 2:默认 dispatch 在只读 /app 下建不了 worktree——workspace 绑定 /app/work
RETEST4 新发现 2:make_worktree 把 worktree 建在 HERE/work/
host-worktrees,单元内 HERE=/app 而 /app 是 --bind-ro,带 repo
的默认 dispatch 撞 OSError Errno 30(--no-worktree 的同任务
越过此关、跑到真实 turn)。
二选一取 (a) 给 worktree 一条单元内可写路径:客机 workspace
下的 .chv-worktrees 以可写 --bind 挂到单元内 /app/work 上
(build_nspawn_argv 新增 worktrees_dir 参数,默认
WORKTREE_DIR=/home/chv/workspace/.chv-worktrees;run_cell 起
单元前 _ensure_bind_source 建好该目录并 chown 回 chv)。
取舍:
- 不选 (b) 执行器默认 dispatch 带 --no-worktree:worktree
隔离就丢了——任务改动直接落进 repo 本身,多任务同仓互撞,
merge/discard/seed-dir 语义全坏;且只修 dispatch,goal/fork
同样调 make_worktree,照样撞 Errno 30。
- (a) 内不选可写 tmpfs:tmpfs 随单元退出即丢 worktree,跨
cell 的 run/merge 续跑找不着工作区;workspace 绑定随客机
磁盘持久化,worktree 语义、隔离与落盘位置(仍是
/app/work/host-worktrees/<任务>)全都不变,也不碰 P2 的
/usr 只读约束。
- bind 必须排在 --bind-ro=/app 之后(nspawn 按顺序挂载,后挂
的才盖住只读子树下的子路径),单测钉住该顺序。
未决(须 RETEST5 真机验证):nspawn 对 --bind 目的路径的
处理(目的不存在时是否自动建挂载点)与挂载叠加顺序只能在
真机上验证,单测只能钉住 argv 形状;本轮不建镜像、不跑真机。
新测试 cloud/tests/test_chv_muse_p2.py::CellPart5WorktreeTest
(4 项):可写 bind 在位且在 workspace 下、顺序在
--bind-ro=/app 之后、自定义目录参数生效。
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