InstallCommand silently dying on me

[mxdev88]

I've been trying to understand what I was doing wrong. The requirements.txt would not appear to be bundled in the egg.

Debugging the command, I found out that InstallCommand must be trying to re-open the NamedTemporaryFile which fails on Windows.

ERROR: Could not open requirements file: [Errno 13] Permission denied: 'C:\\Users\\home\\AppData\\Local\\Temp\\tmpgk4mrzyz''

The error is explained in the NamedTemporaryFile documentation :

whether the name can be used to open the file a second time, while the named temporary file is still open, varies across platforms (it can be so used on Unix; it cannot on Windows NT or later)

Changing to this worked.

if os.path.exists(self.requirements_file):
   install_command = InstallCommand('PyAssemblyInternalInstall', 'Installs package dependencies.', isolated=False)
   install_command.main(args=['-r', self.requirements_file, '-t', dist_dir])

This is not the solution off course but allowed me to understand where the issue came from.

[alekseyig]

I do not have access to Windows and cannot really check/debug this error. The reason we are using temp file is that we rewrite the original requirements file to remove comments and dependency on pyassembly itself.
Not sure why it fails on Windows, we do not try to reopen the temp file.