Infinite recursion while finding cl.exe

[nyanpasu64]

I have quite a complex setup, with a "path" folder stored under %userprofile%/Dropbox/encrypted/dirlinks/path, and symlinked to %userprofile%/encrypted/dirlinks/path and %userprofile%/path. I also have ConEmu installed.

I only added %userprofile%/path to my PATH variable, while building in Visual Studio.

When I copy clcache.exe to cl.exe and execute it, it enters infinite recursion, unless:

1. %CD% current directory does not contain cl.exe.
2. %PATH% contains the normalized path to path folder, and not a path to that folder, but containing symlinks along the way.

If 2 is not true, findCompilerBinary() returns the wrong path since myExecutablePath() (sys.executable.upper()) differs from path.upper() (from %PATH%), even if cl.exe is the same file, accessed via different symlinks.

If 1 is not true, I don't know what's wrong since I don't know how to debug py2exe programs.

---

I could set CLCACHE_CL, but the default folder differs by host and EXE architecture, making me feel somewhat uncomfortable about setting it up (hard-coded to match one VS project and configuration).

---

Maybe you should use os.path.realpath(...) or Path.resolve() to normalize paths, to fix 2. I'm not sure if that will fix 1.

[nyanpasu64]

I tried running a build in Visual Studio with CLCACHE_CL set. The build never started (I'm not sure if CLCACHE_CL was passed into clcache.exe properly) complained CL.exe path was too long (must be below 260 characters or something). Ctrl-F through Diagnostic logs showed that error was the only occurrence of cl.exe (it never got called).

---

In [5]: from pathlib import Path

In [13]: Path('/users/jimbo1qaz/path').resolve()
Out[13]: WindowsPath('C:/Users/jimbo1qaz/Dropbox/encrypted/dirlinks/path')

In [14]: Path('/users/jimbo1qaz/path').resolve() ==  Path('/users/jimbo1qaz/dropbox/encrypted/dirlinks/path').resolve()
Out[14]: True

In [15]: Path('/users/jimbo1qaz/path') ==  Path('/users/jimbo1qaz/dropbox/encrypted/dirlinks/path')
Out[15]: False

In [16]: Path('/users') == Path('/Users')
Out[16]: True

In [17]: os.path.realpath('/users') ==  os.path.realpath('/userS')
Out[17]: False

Pathlib was introduced in 3.4. Apparently you've dropped Python 3.3 and 2.x already.

[nyanpasu64]

• Call path: C:\path\cl.exe -> python C:\path\cl(which doesn't exist) -> loads the actual clcache package from directory tree.
  • This may be wrong.
• hasattr(sys, "frozen") is false.
• sys.argv[0] is "C:\path\cl" (which doesn't exist, only C:\path\cl.exe exists)
• When searching for cl.exe, ensure cl.exe -> (Path(_).resolve(), os.path.splitext(_)[0], Path(_)) != Path(sys.argv[0]).resolve().
  • This fixes the bug for me, but is very ugly.

I'd send a pull request, but this project seems unmaintained.