Bug: codemetapy incorrectly expands a url into a nested Person inside of a Person

[apirogov]

Inputs:

package.json:

{
  "name": "somesy",
  "version": "0.1.0",
  "description": "A cli tool for synchronizing CITATION.CFF with project files.",
  "keywords": [
    "metadata",
    "FAIR"
  ],
  "license": "MIT",
  "repository": {
    "type": "git",
    "url": "https://github.com/Materials-Data-Science-and-Informatics/somesy"
  },
  "homepage": "https://materials-data-science-and-informatics.github.io/somesy",
  "author": {
    "name": "Mustafa Soylu",
    "email": "m.soylu@fz-juelich.de",
    "url": "https://orcid.org/0000-0003-2637-0432"
  },
  "contributors": [
    {
      "name": "Mustafa Soylu",
      "email": "m.soylu@fz-juelich.de",
      "url": "https://orcid.org/0000-0003-2637-0432"
    },
    {
      "name": "Anton Pirogov",
      "email": "a.pirogov@fz-juelich.de",
      "url": "https://orcid.org/0000-0002-5077-7497"
    },
    {
      "name": "Jens Br\u00f6der",
      "email": "j.broeder@fz-juelich.de",
      "url": "https://orcid.org/0000-0001-7939-226X"
    }
  ],
  "main": "index.js",
  "scripts": {
    "test": "echo \"No tests available\""
  },
  "dependencies": {
    "lodash": "^4.17.21",
    "axios": "^0.21.1"
  },
  "devDependencies": {
    "jest": "^27.0.6"
  }
}

extra_codemeta.json:

{
  "@context": "https://doi.org/10.5063/schema/codemeta-2.0",
  "@type": "SoftwareSourceCode",
  "author": [
    {
      "@id": "https://orcid.org/0000-0003-2637-0432",
      "@type": "Person",
      "familyName": "Soylu",
      "givenName": "Mustafa"
    },
    {
      "@id": "https://orcid.org/0000-0002-5077-7497",
      "@type": "Person",
      "familyName": "Pirogov",
      "givenName": "Anton"
    }
  ],
  "codeRepository": "https://github.com/Materials-Data-Science-and-Informatics/somesy",
  "description": "A cli tool for synchronizing CITATION.CFF with project files.",
  "keywords": [
    "metadata",
    "FAIR"
  ],
  "license": "https://spdx.org/licenses/MIT",
  "name": "somesy",
  "url": "https://materials-data-science-and-informatics.github.io/somesy",
  "version": "0.1.0"
}

Output (codemetapy package.json extra_codemeta.json):

[...]
    "contributor": [
        {
            "@type": "Person",
            "email": "m.soylu@fz-juelich.de",
            "familyName": "Soylu",
            "givenName": "Mustafa",
            "url": {
                "@id": "https://orcid.org/0000-0003-2637-0432",
                "@type": "Person",
                "familyName": "Soylu",
                "givenName": "Mustafa"
            }
        },
        {
            "@type": "Person",
            "email": "a.pirogov@fz-juelich.de",
            "familyName": "Pirogov",
            "givenName": "Anton"
        },
        {
            "@type": "Person",
            "email": "j.broeder@fz-juelich.de",
            "familyName": "Bröder",
            "givenName": "Jens"
        }
    ],
[...]

The fact that the Orcid / URL field vanishes for other contributors I reported in #45

but the other independent problem is that apparently something in the merge goes wrong - the url is expanded into another person object, leading to this weird and incorrect nested Person entry.

Expected: The url is not expanded into a nested Person. Either map it to @id, or keep it as url (because url could also be a homepage, and that is a bad @id if you merge from different sources could cause problems assuming that url is a good Person @id, unless its an ORCID), I don't know, but it should remain a string.

[proycon]

Ouch, this is indeed problematic. Codemetapy is a bit eager to turn strings
into resource references if there is such @id in the graph. It's a bit hacky
but it removes a certain class of errors. This however is a clear case where it
goes wrong. I'll probably exempt the url property (and some more like it)
from this behaviour so that it will solve at least this case.

[proycon]

Fixed and released now