chore: git_push_dlp 改 robocopy 增量镜像（固定 stage 复用，只复制变动文件）

.kimi-code/skills/git-push-dlp/SKILL.md

@@ -20,11 +20,12 @@ fatal: not a git repository (or any of the parent directories): .git
 
 ## 原理
 
-1. `xcopy .git` 到 `%TEMP%\git_push_dlp\<repo>-<random>\`（保护区外，授权进程
+1. `robocopy /MIR .git` 到固定 stage 目录 `%TEMP%\git_push_dlp\<repo>\`（保护区外，
-   读出明文，写出不再加密）。默认通过 `/EXCLUDE` 排除 `.git\lfs`（LFS 对象
+   授权进程读出明文，写出不再加密）。stage 目录跨运行保留：首次全量镜像，
-   缓存，动辄数 GB，普通提交 push 不需要）。
+   之后每次 push 只复制变动的文件。默认通过 `/XD lfs` 排除 `.git\lfs`（LFS
+   对象缓存，动辄数 GB，普通提交 push 不需要）。
 2. 在 stage 副本里执行 `git push`。
-3. 回到原仓库 `git fetch` 同步远程跟踪引用，然后删除 stage。
+3. 回到原仓库 `git fetch` 同步远程跟踪引用。stage 目录保留不删，供下次增量复用。
 
 ## 使用方法
 
@@ -45,9 +46,9 @@ set GIT_PUSH_DLP_WITH_LFS=1
 
 ## 排障
 
-- **`[ERROR] xcopy .git failed. Insufficient disk space`**：TEMP 所在盘空间不足。
+- **`[ERROR] robocopy .git failed`**：常见于 TEMP 所在盘空间不足。stage 目录
-  先清理 `%TEMP%\git_push_dlp\` 下历史失败残留的 `TestHub-*` 目录（脚本在
+  跨运行复用（`%TEMP%\git_push_dlp\<repo>\`），旧版本脚本留下的 `<repo>-<数字>`
-  xcopy 失败时不会自动清理）。仍不足时确认是否误设了
+  残留目录可以整体删除。仍不足时确认是否误设了
   `GIT_PUSH_DLP_WITH_LFS`（全量 lfs 可能超过盘符剩余空间）。
 - **stage 在 E: 盘也报 128**：整个 E: 盘都在 DLP 拦截范围内，stage 必须落在
   C:（`%TEMP%` 默认位置），不要把 `TEMP` 指到 E:。

.kimi-code/skills/git-push-dlp/scripts/git_push_dlp.bat

@@ -5,8 +5,11 @@ rem Push from a DLP-protected (transparent-encrypted) directory where
 rem "git push" fails with: fatal: not a git repository
 rem
 rem How it works:
-rem   1. xcopy .git to a stage dir under %TEMP% (outside the protected zone,
+rem   1. Mirror .git to a fixed per-repo stage dir under %TEMP% with
-rem      an authorized process reads plaintext, no re-encryption outside).
+rem      robocopy /MIR (outside the protected zone, an authorized process
+rem      reads plaintext, no re-encryption outside). The stage dir is kept
+rem      between runs, so after the first full mirror only changed files
+rem      are copied on subsequent pushes.
 rem   2. Run "git push" from the stage dir.
 rem   3. Run "git fetch" in the original repo to sync remote-tracking refs.
 rem
@@ -16,8 +19,9 @@ rem   git_push_dlp origin main          = git push origin main
 rem   git_push_dlp upstream main:main   = any normal push args
 rem
 rem Env vars:
-rem   GIT_PUSH_DLP_WITH_LFS=1           = also copy .git\lfs (needed only when
+rem   GIT_PUSH_DLP_WITH_LFS=1           = also mirror .git\lfs (needed only
-rem                                       the push contains new LFS objects)
+rem                                       when the push contains new LFS
+rem                                       objects)
 rem ==========================================================================
 setlocal EnableExtensions EnableDelayedExpansion
 chcp 65001 >nul
@@ -28,24 +32,24 @@ if not exist ".git\" (
 )
 
 for %%I in ("%CD%") do set "REPO_NAME=%%~nxI"
-set "STAGE=%TEMP%\git_push_dlp\%REPO_NAME%-%RANDOM%%RANDOM%"
+set "STAGE=%TEMP%\git_push_dlp\%REPO_NAME%"
 
 echo [DLP] Stage dir: %STAGE%
 
 rem .git\lfs is the LFS object cache (often several GB); normal commits do
-rem not need it for push. Excluding it avoids xcopy disk-space failures.
+rem not need it for push. Excluding it avoids filling up the TEMP drive.
 rem If this push contains new/changed LFS files, set GIT_PUSH_DLP_WITH_LFS=1 first.
-set "EXCLUDE_OPT="
+set "EXCLUDE_OPT=/XD lfs"
-if not defined GIT_PUSH_DLP_WITH_LFS (
+if defined GIT_PUSH_DLP_WITH_LFS set "EXCLUDE_OPT="
-    set "EXCLUDE_FILE=%TEMP%\git_push_dlp_exclude.txt"
+if defined GIT_PUSH_DLP_WITH_LFS (
-    > "!EXCLUDE_FILE!" echo \lfs\
+    echo [DLP] Including .git\lfs
-    set "EXCLUDE_OPT=/EXCLUDE:!EXCLUDE_FILE!"
+) else (
     echo [DLP] Excluding .git\lfs ^(set GIT_PUSH_DLP_WITH_LFS=1 to include^)
 )
 
-xcopy /E /I /Q /H /Y %EXCLUDE_OPT% ".git" "%STAGE%\.git" >nul
+robocopy ".git" "%STAGE%\.git" /MIR %EXCLUDE_OPT% /NFL /NDL /NJH /NP >nul
-if errorlevel 1 (
+if errorlevel 8 (
-    echo [ERROR] xcopy .git failed.
+    echo [ERROR] robocopy .git failed ^(exit %ERRORLEVEL%^).
     exit /b 1
 )
 
@@ -64,7 +68,6 @@ popd
 
 if not "%EXIT_CODE%"=="0" (
     echo [ERROR] push failed with exit code %EXIT_CODE%
-    rmdir /s /q "%STAGE%" 2>nul
     exit /b %EXIT_CODE%
 )
 
@@ -72,7 +75,6 @@ echo [DLP] Sync back: git fetch %REMOTE%
 git fetch %REMOTE%
 set "FETCH_CODE=%ERRORLEVEL%"
 
-rmdir /s /q "%STAGE%" 2>nul
 if not "%FETCH_CODE%"=="0" (
     echo [WARN] push succeeded but fetch back failed with exit code %FETCH_CODE%
     exit /b %FETCH_CODE%