Packages with multiple LICENSES files not shown in --with-license-file

$ pip install -U pip pip-licenses
$ pip install opencv-python-headless==4.2.0.34
$ pip-licenses --from=mixed --with-license-report

The opencv-python-headless wheels include two license files, LICENSE.txt and LICENSE-3RD-PARTY.txt, but only LICENSE-3RD-PARTY.txt is displayed. Could support be added to display both license files since some packages like opencv have multiple files covering different parts of the library.

---

Format	LicensePath	LicenseText
Plain/Plain Vertical	\n	\n\n
JSON	JSON List []	JSON List []
CSV	;
HTML

[raimon49]

JSON can be represented as data in a list.

[
  {
    "licenses": ["BSD"],
    "name": "Django",
    "version": "2.0.2",
    "LicensePath": ["/path/to/LICENSE1", "/path/to/LICENSE2"],
    "LicenseText ": ["LICENSE Text 1", "ICENSE Text 2"]
  },
]

Users will find it useful to be able to pass the output to the | jq command.

Some kind of delimiter is required in CSV. But for example ; also appears in the Apache License 2.0. https://choosealicense.com/licenses/apache-2.0/

It’s a very vexing issue…

[johnthagen]

I propose --with-license-file be replaced with --with-license-files so that it is more accurate, and --with-license-files changed to only support formats that can support license files (they need to be able to handle \n without breaking the table/output).

Formats supported with --with-license-files:

• HTML

<table>
    <tr>
        <th>Name</th>
        <th>Version</th>
        <th>License</th>
        <th>LicenseFiles</th>
    </tr>
    <tr>
        <td>Django</td>
        <td>2.0.2</td>
        <td>BSD</td>
        <td>
          <ul>
            <li>License File Contents ...</li>
            <li>License File 2 Contents ...</li>
          </ul>
        </td>
    </tr>
</table>

• JSON

[
  {
    "licenses": ["BSD"],
    "name": "Django",
    "version": "2.0.2",
    "LicensePath": ["/path/to/LICENSE1", "/path/to/LICENSE2"],
    "LicenseText ": ["LICENSE Text 1", "ICENSE Text 2"]
  },
]

• JSON LicenseFinder This format does not take into account --with-license-file currently. Perhaps a warning or error should be thrown in this case?
• Plain Vertical

pytest
5.3.4
MIT LICENSE
<LICENSE File 1 Contents>

<LICENSE File 2 Contents>

Other formats will result in a CLI error if combined with --with-license-files.