Returns empty packages information when trying to scan a .whl package

[srinivasshivaji]

Description

I am trying to scan a .whl package to get all the package info from it (such as package name, version etc...) but the result gives always empty list in packages section (Not giving any package related info such as name, version, description etc...). same for jars aswell

{
  "headers": [
    {
      "tool_name": "scancode-toolkit",
      "tool_version": "3.0.2",
      "options": {
        "input": "python_repos/pip_downloads_from_requirements/jmespath-0.9.4-py2.py3-none-any.whl",
        "--info": true,
        "--json-pp": "scancode_res.json",
        "--package": true,
        "--processes": "2"
      },
      "notice": "Generated with ScanCode and provided on an \"AS IS\" BASIS, WITHOUT WARRANTIES\nOR CONDITIONS OF ANY KIND, either express or implied. No content created from\nScanCode should be considered or used as legal advice. Consult an Attorney\nfor any legal advice.\nScanCode is a free software code scanning tool from nexB Inc. and others.\nVisit https://github.com/nexB/scancode-toolkit/ for support and download.",
      "start_timestamp": "2019-04-01T150032.328119",
      "end_timestamp": "2019-04-01T150035.541706",
      "message": null,
      "errors": [],
      "extra_data": {
        "files_count": 1
      }
    }
  ],
  "files": [
    {
      "path": "jmespath-0.9.4-py2.py3-none-any.whl",
      "type": "file",
      "name": "jmespath-0.9.4-py2.py3-none-any.whl",
      "base_name": "jmespath-0.9.4-py2.py3-none-any",
      "extension": ".whl",
      "size": 24161,
      "date": "2019-04-01",
      "sha1": "4e18f8857463b944b861448eccfeec4edcf09cd3",
      "md5": "730e8863a8c03bae9d93234c77b39aef",
      "mime_type": "application/zip",
      "file_type": "Zip archive data, at least v2.0 to extract",
      "programming_language": null,
      "is_binary": true,
      "is_text": false,
      "is_archive": true,
      "is_media": false,
      "is_source": false,
      "is_script": false,
      "packages": [],
      "files_count": 0,
      "dirs_count": 0,
      "size_count": 0,
      "scan_errors": []
    }
  ]
}

Help on same is much appreciated !

System configuration

For bug reports, it really helps us to know:

• What OS are you running on? Linux
• What version of scancode-toolkit was used to generate the scan file? -> 3.0.2
• What installation method was used to install/run scancode? pip

[pombredanne]

@srinivasshivaji thank you for this report!
ScanCode does not introspect yet in compressed archives though there is a long pending ticket in #14
You can however extract recursively the archives (wheels and JARs) by using the extractcode command line tool that is included with ScanCode. By running this before you scan, the archives will be extracted

Note through that the full support for wheels metadata is not yet fully wired in yet and will eventually uses all the ways described in #253 and in particular @tseaver 's https://bazaar.launchpad.net/~tseaver/pkginfo/ who kindly merged in some of my patches recently

[srinivasshivaji]

Thanks a lot for quick response @pombredanne . Such an environment makes one to have confidence on the tool and reliably use it. Will get back if i have any more queries related on same.