Fix PyInstaller temp directory accumulation on Windows by Copilot · Pull Request #18 · apache/casbin-python-cli

Copilot · 2025-10-30T02:41:04Z

PyInstaller's --runtime-tmpdir ./temp flag creates persistent _MEI* directories in the user's working directory that accumulate unbounded, consuming >10GB after repeated runs.

Changes

Removed --runtime-tmpdir ./temp from PyInstaller build command in scripts/build_binaries.py

PyInstaller now extracts to OS-managed temp directories (%TEMP% on Windows, /tmp on Linux) that are automatically cleaned up.

# Before
cmd = [
    "pyinstaller",
    "--onefile",
    "--runtime-tmpdir", "./temp",  # Creates persistent ./temp/_MEI* dirs
    "--name", binary_name,
    ...
]

# After
cmd = [
    "pyinstaller",
    "--onefile",
    "--name", binary_name,  # Uses OS temp dir by default
    ...
]

Original prompt

This section details on the original issue you should resolve

<issue_title>[bug] Running casbin-python-cli-windows-x86_64.exe in Windows causes downloading a lot of run-time DLLs</issue_title>
<issue_description>Running casbin-python-cli-windows-x86_64.exe in Windows causes downloading a lot of run-time DLLs like:

C:\github_repos\casdoor\temp>dir
 Volume in drive C has no label.
 Volume Serial Number is C82E-F3DE

 Directory of C:\github_repos\casdoor\temp

10/30/2025  10:32 AM    <DIR>          .
10/30/2025  12:03 AM    <DIR>          ..
10/30/2025  10:27 AM    <DIR>          _MEI104562
10/30/2025  10:22 AM    <DIR>          _MEI105002
10/30/2025  10:20 AM    <DIR>          _MEI155202
10/30/2025  10:24 AM    <DIR>          _MEI167442
10/30/2025  10:11 AM    <DIR>          _MEI33402
10/30/2025  10:22 AM    <DIR>          _MEI48402
               0 File(s)              0 bytes
               8 Dir(s)  31,406,051,328 bytes free

C:\github_repos\casdoor\temp>cd _MEI104562

C:\github_repos\casdoor\temp\_MEI104562>dir
 Volume in drive C has no label.
 Volume Serial Number is C82E-F3DE

 Directory of C:\github_repos\casdoor\temp\_MEI104562

10/30/2025  10:27 AM    <DIR>          .
10/30/2025  10:32 AM    <DIR>          ..
10/30/2025  10:27 AM            22,072 api-ms-win-core-console-l1-1-0.dll
10/30/2025  10:27 AM            22,056 api-ms-win-core-datetime-l1-1-0.dll
10/30/2025  10:27 AM            21,944 api-ms-win-core-debug-l1-1-0.dll
10/30/2025  10:27 AM            22,096 api-ms-win-core-errorhandling-l1-1-0.dll
10/30/2025  10:27 AM            22,072 api-ms-win-core-fibers-l1-1-0.dll
10/30/2025  10:27 AM            22,072 api-ms-win-core-fibers-l1-1-1.dll
10/30/2025  10:27 AM            26,152 api-ms-win-core-file-l1-1-0.dll
10/30/2025  10:27 AM            22,056 api-ms-win-core-file-l1-2-0.dll
10/30/2025  10:27 AM            21,960 api-ms-win-core-file-l2-1-0.dll
10/30/2025  10:27 AM            21,944 api-ms-win-core-handle-l1-1-0.dll
10/30/2025  10:27 AM            22,072 api-ms-win-core-heap-l1-1-0.dll
10/30/2025  10:27 AM            22,072 api-ms-win-core-interlocked-l1-1-0.dll
10/30/2025  10:27 AM            22,080 api-ms-win-core-kernel32-legacy-l1-1-1.dll
10/30/2025  10:27 AM            22,056 api-ms-win-core-libraryloader-l1-1-0.dll
10/30/2025  10:27 AM            22,080 api-ms-win-core-localization-l1-2-0.dll
10/30/2025  10:27 AM            22,056 api-ms-win-core-memory-l1-1-0.dll
10/30/2025  10:27 AM            22,096 api-ms-win-core-namedpipe-l1-1-0.dll
10/30/2025  10:27 AM            21,968 api-ms-win-core-processenvironment-l1-1-0.dll
10/30/2025  10:27 AM            22,096 api-ms-win-core-processthreads-l1-1-0.dll
10/30/2025  10:27 AM            22,072 api-ms-win-core-processthreads-l1-1-1.dll
10/30/2025  10:27 AM            22,080 api-ms-win-core-profile-l1-1-0.dll
10/30/2025  10:27 AM            21,960 api-ms-win-core-rtlsupport-l1-1-0.dll
10/30/2025  10:27 AM            22,056 api-ms-win-core-string-l1-1-0.dll
10/30/2025  10:27 AM            22,056 api-ms-win-core-synch-l1-1-0.dll
10/30/2025  10:27 AM            22,080 api-ms-win-core-synch-l1-2-0.dll
10/30/2025  10:27 AM            22,072 api-ms-win-core-sysinfo-l1-1-0.dll
10/30/2025  10:27 AM            22,080 api-ms-win-core-sysinfo-l1-2-0.dll
10/30/2025  10:27 AM            22,056 api-ms-win-core-timezone-l1-1-0.dll
10/30/2025  10:27 AM            21,944 api-ms-win-core-util-l1-1-0.dll
10/30/2025  10:27 AM            22,056 api-ms-win-crt-conio-l1-1-0.dll
10/30/2025  10:27 AM            26,056 api-ms-win-crt-convert-l1-1-0.dll
10/30/2025  10:27 AM            22,080 api-ms-win-crt-environment-l1-1-0.dll
10/30/2025  10:27 AM            22,056 api-ms-win-crt-filesystem-l1-1-0.dll
10/30/2025  10:27 AM            22,096 api-ms-win-crt-heap-l1-1-0.dll
10/30/2025  10:27 AM            22,080 api-ms-win-crt-locale-l1-1-0.dll
10/30/2025  10:27 AM            30,248 api-ms-win-crt-math-l1-1-0.dll
10/30/2025  10:27 AM            22,096 api-ms-win-crt-process-l1-1-0.dll
10/30/2025  10:27 AM            26,152 api-ms-win-crt-runtime-l1-1-0.dll
10/30/2025  10:27 AM            26,168 api-ms-win-crt-stdio-l1-1-0.dll
10/30/2025  10:27 AM            26,176 api-ms-win-crt-string-l1-1-0.dll
10/30/2025  10:27 AM            22,096 api-ms-win-crt-time-l1-1-0.dll
10/30/2025  10:27 AM            21,952 api-ms-win-crt-utility-l1-1-0.dll
10/30/2025  10:27 AM         1,443,565 base_library.zip
10/30/2025  10:27 AM    <DIR>          casbin
10/30/2025  10:27 AM         5,191,960 libcrypto-3.dll
10/30/2025  10:27 AM           787,224 libssl-3.dll
10/30/2025  10:27 AM    <DIR>          pycasbin-2.3.0.dist-info
10/30/2025  10:27 AM         5,800,216 python311.dll
10/30/2025  10:27 AM            30,488 select.pyd
10/30/2025  10:27 AM           119,192 VCRUNTIME140.dll
10/30/2025  10:27 AM            84,760 _bz2.pyd
10/30/2025  10:27 AM       ...

</details>

- Fixes casbin/casbin-python-cli#17

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CLAassistant · 2025-10-30T02:41:10Z

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

…ctories Co-authored-by: hsluoyz <3787410+hsluoyz@users.noreply.github.com>

Initial plan

0b01850

Copilot AI assigned Copilot and hsluoyz Oct 30, 2025

hsluoyz marked this pull request as ready for review October 30, 2025 02:41

Remove --runtime-tmpdir flag to prevent DLL accumulation in user dire…

907d495

…ctories Co-authored-by: hsluoyz <3787410+hsluoyz@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Fix DLLs downloading issue for casbin-python-cli on Windows~~ Fix PyInstaller temp directory accumulation on Windows Oct 30, 2025

Copilot AI requested a review from hsluoyz October 30, 2025 02:47

hsluoyz closed this Oct 30, 2025

hsluoyz mentioned this pull request Oct 30, 2025

feat: add cleanOldMEIFolders() for casbin-python-cli casdoor/casdoor#4353

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Fix PyInstaller temp directory accumulation on Windows#18

Fix PyInstaller temp directory accumulation on Windows#18
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Copilot AI commented Oct 30, 2025 •

edited

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Copilot AI commented Oct 30, 2025 •

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