project_metadata.schema.json

{
  "$schema": "http://json-schema.org/draft-07/schema#",

  "$id": "https://packaging.python.org/en/latest/specifications/pyproject-toml/",
  "title": "Package metadata stored in the ``project`` table",
  "$$description": [
    "Data structure for the **project** table inside ``pyproject.toml``",
    "(as initially defined in :pep:`621`)"
  ],

  "type": "object",
  "properties": {
    "name": {
       "type": "string",
       "description":
         "The name (primary identifier) of the project. MUST be statically defined.",
       "format": "pep508-identifier"
    },
    "version": {
      "type": "string",
      "description": "The version of the project as supported by :pep:`440`.",
      "format": "pep440"
    },
    "description": {
      "type": "string",
      "$$description": [
        "The `summary description of the project",
        "<https://packaging.python.org/specifications/core-metadata/#summary>`_"
      ]
    },
    "readme": {
      "$$description": [
        "`Full/detailed description of the project in the form of a README",
        "<https://peps.python.org/pep-0621/#readme>`_",
        "with meaning similar to the one defined in `core metadata's Description",
        "<https://packaging.python.org/specifications/core-metadata/#description>`_"
      ],
      "oneOf": [
        {
          "type": "string",
          "$$description": [
            "Relative path to a text file (UTF-8) containing the full description",
            "of the project. If the file path ends in case-insensitive ``.md`` or",
            "``.rst`` suffixes, then the content-type is respectively",
            "``text/markdown`` or ``text/x-rst``"
          ]
        },
        {
          "type": "object",
          "allOf": [
            {
              "anyOf": [
                {
                  "properties": {
                    "file": {
                      "type": "string",
                      "$$description": [
                        "Relative path to a text file containing the full description",
                        "of the project."
                      ]
                    }
                  },
                  "required": ["file"]
                },
                {
                  "properties": {
                    "text": {
                      "type": "string",
                      "description": "Full text describing the project."
                    }
                  },
                  "required": ["text"]
                }
              ]
            },
            {
              "properties": {
                "content-type" : {
                  "type": "string",
                  "$$description": [
                    "Content-type (:rfc:`1341`) of the full description",
                    "(e.g. ``text/markdown``). The ``charset`` parameter is assumed",
                    "UTF-8 when not present."
                  ],
                  "$comment": "TODO: add regex pattern or format?"
                }
              },
              "required": ["content-type"]
            }
          ]
        }
      ]
    },
    "requires-python": {
      "type": "string",
      "format": "pep508-versionspec",
      "$$description": [
        "`The Python version requirements of the project",
        "<https://packaging.python.org/specifications/core-metadata/#requires-python>`_."
      ]
    },
    "license": {
      "description":
        "`Project license <https://peps.python.org/pep-0621/#license>`_.",
      "oneOf": [
        {
          "type": "string",
          "description": "An SPDX license identifier",
          "format": "SPDX"
        },
        {
          "type": "object",
          "properties": {
            "file": {
              "type": "string",
              "$$description": [
                "Relative path to the file (UTF-8) which contains the license for the",
                "project."
              ]
            }
          },
          "required": ["file"]
        },
        {
          "type": "object",
          "properties": {
            "text": {
              "type": "string",
              "$$description": [
                "The license of the project whose meaning is that of the",
                "`License field from the core metadata",
                "<https://packaging.python.org/specifications/core-metadata/#license>`_."
              ]
            }
          },
          "required": ["text"]
        }
      ]
    },
    "license-files": {
      "description": "Paths or globs to paths of license files",
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "authors": {
      "type": "array",
      "items": {"$ref": "#/definitions/author"},
      "$$description": [
        "The people or organizations considered to be the 'authors' of the project.",
        "The exact meaning is open to interpretation (e.g. original or primary authors,",
        "current maintainers, or owners of the package)."
      ]
    },
    "maintainers": {
      "type": "array",
      "items": {"$ref": "#/definitions/author"},
      "$$description": [
        "The people or organizations considered to be the 'maintainers' of the project.",
        "Similarly to ``authors``, the exact meaning is open to interpretation."
      ]
    },
    "keywords": {
      "type": "array",
      "items": {"type": "string"},
      "description":
        "List of keywords to assist searching for the distribution in a larger catalog."
    },
    "classifiers": {
      "type": "array",
      "items": {
        "type": "string",
        "format": "trove-classifier",
        "description": "`PyPI classifier <https://pypi.org/classifiers/>`_."
      },
      "$$description": [
        "`Trove classifiers <https://pypi.org/classifiers/>`_",
        "which apply to the project."
      ]
    },
    "urls": {
      "type": "object",
      "description": "URLs associated with the project in the form ``label => value``.",
      "additionalProperties": false,
      "patternProperties": {
        "^.+$": {"type": "string", "format": "url"}
      }
    },
    "scripts": {
      "$ref": "#/definitions/entry-point-group",
      "$$description": [
        "Instruct the installer to create command-line wrappers for the given",
        "`entry points <https://packaging.python.org/specifications/entry-points/>`_."
      ]
    },
    "gui-scripts": {
      "$ref": "#/definitions/entry-point-group",
      "$$description": [
        "Instruct the installer to create GUI wrappers for the given",
        "`entry points <https://packaging.python.org/specifications/entry-points/>`_.",
        "The difference between ``scripts`` and ``gui-scripts`` is only relevant in",
        "Windows."
      ]
    },
    "entry-points": {
      "$$description": [
        "Instruct the installer to expose the given modules/functions via",
        "``entry-point`` discovery mechanism (useful for plugins).",
        "More information available in the `Python packaging guide",
        "<https://packaging.python.org/specifications/entry-points/>`_."
      ],
      "propertyNames": {"format": "python-entrypoint-group"},
      "additionalProperties": false,
      "patternProperties": {
        "^.+$": {"$ref": "#/definitions/entry-point-group"}
      }
    },
    "dependencies": {
      "type": "array",
      "description": "Project (mandatory) dependencies.",
      "items": {"$ref": "#/definitions/dependency"}
    },
    "optional-dependencies": {
      "type": "object",
      "description": "Optional dependency for the project",
      "propertyNames": {"format": "pep508-identifier"},
      "additionalProperties": false,
      "patternProperties": {
        "^.+$": {
          "type": "array",
          "items": {"$ref": "#/definitions/dependency"}
        }
      }
    },
    "dynamic": {
      "type": "array",
      "$$description": [
        "Specifies which fields are intentionally unspecified and expected to be",
        "dynamically provided by build tools"
      ],
      "items": {
        "enum": [
          "version",
          "description",
          "readme",
          "requires-python",
          "license",
          "license-files",
          "authors",
          "maintainers",
          "keywords",
          "classifiers",
          "urls",
          "scripts",
          "gui-scripts",
          "entry-points",
          "dependencies",
          "optional-dependencies"
        ]
      }
    }
  },
  "required": ["name"],
  "additionalProperties": false,
  "allOf": [
    {
      "if": {
        "not": {
          "required": ["dynamic"],
          "properties": {
            "dynamic": {
              "contains": {"const": "version"},
              "$$description": ["version is listed in ``dynamic``"]
            }
          }
        },
        "$$comment": [
          "According to :pep:`621`:",
          "    If the core metadata specification lists a field as \"Required\", then",
          "    the metadata MUST specify the field statically or list it in dynamic",
          "In turn, `core metadata`_ defines:",
          "    The required fields are: Metadata-Version, Name, Version.",
          "    All the other fields are optional.",
          "Since ``Metadata-Version`` is defined by the build back-end, ``name`` and",
          "``version`` are the only mandatory information in ``pyproject.toml``.",
          ".. _core metadata: https://packaging.python.org/specifications/core-metadata/"
        ]
      },
      "then": {
        "required": ["version"],
        "$$description": ["version should be statically defined in the ``version`` field"]
      }
    },
    {
      "if": {
        "required": ["license-files"]
      },
      "then": {
        "properties": {
          "license": {
            "type": "string"
          }
        }
      }
    }
  ],

  "definitions": {
    "author": {
      "$id": "#/definitions/author",
      "title": "Author or Maintainer",
      "$comment": "https://peps.python.org/pep-0621/#authors-maintainers",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "name": {
          "type": "string",
          "$$description": [
            "MUST be a valid email name, i.e. whatever can be put as a name, before an",
            "email, in :rfc:`822`."
          ]
        },
        "email": {
          "type": "string",
          "format": "idn-email",
          "description": "MUST be a valid email address"
        }
      }
    },
    "entry-point-group": {
      "$id": "#/definitions/entry-point-group",
      "title": "Entry-points",
      "type": "object",
      "$$description": [
        "Entry-points are grouped together to indicate what sort of capabilities they",
        "provide.",
        "See the `packaging guides",
        "<https://packaging.python.org/specifications/entry-points/>`_",
        "and `setuptools docs",
        "<https://setuptools.pypa.io/en/latest/userguide/entry_point.html>`_",
        "for more information."
      ],
      "propertyNames": {"format": "python-entrypoint-name"},
      "additionalProperties": false,
      "patternProperties": {
        "^.+$": {
          "type": "string",
          "$$description": [
            "Reference to a Python object. It is either in the form",
            "``importable.module``, or ``importable.module:object.attr``."
          ],
          "format": "python-entrypoint-reference",
          "$comment": "https://packaging.python.org/specifications/entry-points/"
        }
      }
    },
    "dependency": {
      "$id": "#/definitions/dependency",
      "title": "Dependency",
      "type": "string",
      "description": "Project dependency specification according to PEP 508",
      "format": "pep508"
    }
  }
}