Running v3.1.1 fails with "cannot import name RPM"

[sschuberth]

Description

Running scancode --version for v3.1.1 on Windows yields:

========================================================================
ERROR: UNABLE TO IMPORT SCANCODE PLUGINS.
Check your installation configuration (setup.py) or re-install/re-configure ScanCode.
The following plugin(s) are referenced and cannot be loaded/imported:
cannot import name RPM
========================================================================
Traceback (most recent call last):
  File "C:\Users\sebastian\Development\GitHub\nexB\scancode-toolkit\bin\scancode-script.py", line 11, in <module>
    load_entry_point('scancode-toolkit', 'console_scripts', 'scancode')()
  File "C:\Users\sebastian\Development\GitHub\nexB\scancode-toolkit\lib\site-packages\pkg_resources\__init__.py", line 489, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "C:\Users\sebastian\Development\GitHub\nexB\scancode-toolkit\lib\site-packages\pkg_resources\__init__.py", line 2852, in load_entry_point
    return ep.load()
  File "C:\Users\sebastian\Development\GitHub\nexB\scancode-toolkit\lib\site-packages\pkg_resources\__init__.py", line 2443, in load
    return self.resolve()
  File "C:\Users\sebastian\Development\GitHub\nexB\scancode-toolkit\lib\site-packages\pkg_resources\__init__.py", line 2449, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "c:\users\sebastian\development\github\nexb\scancode-toolkit\src\scancode\cli.py", line 228, in <module>
    raise e
ImportError: cannot import name RPM

How To Reproduce

I'm building ScanCode from Git sources on Windows. I was on tag v3.0.2 (which works fine on Windows) and then switched to tag v3.1.1:

$ git checkout v3.1.1
$ ./configure --clean
$ ./configure
$ ./scancode --version

System configuration

• What OS are you running on? Windows 10 x64 with Git Bash
• What version of scancode-toolkit was used to generate the scan file? 3.1.1
• What installation method was used to install/run scancode? Git

[pombredanne]

@sschuberth I am not sure we ever tested Windows 10 x64 with Git Bash...
Do you have the same issue from a plain command prompt as oppsoed to running gitbash (which is really Cygwin and is therefore a completely different beast than Windows... something like a crossover of POSIX and Windows)

[sschuberth]

It indeed works when configuring ScanCode from cmd instead of Git Bash, i.e. when using configure.bat instead of configure on Windows. As a quick work-around, how about issuing a warning and aborting configure if the OS environment variable it set to Windows_NT?

[pombredanne]

As a quick work-around, how about issuing a warning and aborting configure.sh if the OS environment variable it set to Windows_NT?

that would be great. I wish we could support Cygwin... but that's a can of worms that I have already played with in the past and that's really painful as instead of getting the best of Windows and POSIX it feels to me that you are instead faced with all the bugs and quirks of the union of both!

[arthur657834]

I just fix this bug, and this my pr
#1949

---

this problem did not fix on linux, the code is update today

./configure --clean && ./configure is not work, and same error

Python 2.7.5
CentOS Linux release 7.5.1804 (Core)

10:04:55 ERROR: UNABLE TO IMPORT SCANCODE PLUGINS.
10:04:55 Check your installation configuration (setup.py) or re-install/re-configure ScanCode.
10:04:55 The following plugin(s) are referenced and cannot be loaded/imported:
10:04:55 cannot import name RPM�[0m
10:04:55 ========================================================================
10:04:55 Traceback (most recent call last):
10:04:55 File "/opt/scancode-toolkit/bin/scancode", line 11, in
10:04:55 load_entry_point('scancode-toolkit', 'console_scripts', 'scancode')()
10:04:55 File "/opt/scancode-toolkit/lib/python2.7/site-packages/pkg_resources/init.py", line 489, in load_entry_point
10:04:55 return get_distribution(dist).load_entry_point(group, name)
10:04:55 File "/opt/scancode-toolkit/lib/python2.7/site-packages/pkg_resources/init.py", line 2852, in load_entry_point
10:04:55 return ep.load()
10:04:55 File "/opt/scancode-toolkit/lib/python2.7/site-packages/pkg_resources/init.py", line 2443, in load
10:04:55 return self.resolve()
10:04:55 File "/opt/scancode-toolkit/lib/python2.7/site-packages/pkg_resources/init.py", line 2449, in resolve
10:04:55 module = import(self.module_name, fromlist=['name'], level=0)
10:04:55 File "/opt/scancode-toolkit/src/scancode/cli.py", line 229, in
10:04:55 raise e
10:04:55 ImportError: cannot import name RPM

[sschuberth]

@pombredanne I'm actually seeing this error again on latest develop, but on Linux! Is there a regression?

Edit: I just realized the PR that was supposed to fix this was closed unmerged!

[pombredanne]

@sschuberth let me recheck. This was a non-starter solution #1949 (comment)