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Installation Report

``version`` has been bumped to ``1`` and the format declared stable.

The --report option of the pip install command produces a detailed JSON report of what it did install (or what it would have installed, if used with the --dry-run option).

When considering use cases, please bear in mind that

- while the `--report` option may be used to implement requirement locking tools (among
  other use cases), this format is *not* meant to be a lock file format as such;
- there is no plan for pip to accept an installation report as input for the `install`,
  `download` or `wheel` commands;
- while the `--report` option and this format is a supported pip feature,
  it is *not* a PyPA interoperability standard and as such its evolution is governed by
  the pip processes and not the PyPA standardization processes.

Specification

The report is a JSON object with the following properties:

version: the string 1. It will change only if and when backward incompatible changes are introduced, such as removing mandatory fields or changing the semantics or data type of existing fields. The introduction of backward incompatible changes will follow the usual pip processes such as the deprecation cycle or feature flags. Tools must check this field to ensure they support the corresponding version.
pip_version: a string with the version of pip used to produce the report.
install: an array of InstallationReportItem representing the distribution packages (to be) installed.
environment: an object describing the environment where the installation report was generated. See PEP 508 environment markers for more information. Values have a string type.

(InstallationReportItem)=

An InstallationReportItem is an object describing a (to be) installed distribution package with the following properties:

metadata: the metadata of the distribution, converted to a JSON object according to the PEP 566 transformation.
is_direct: true if the requirement was provided as, or constrained to, a direct URL reference. false if the requirements was provided as a name and version specifier.
is_yanked: true if the requirement was yanked from the index, but was still selected by pip conform to PEP 592.
download_info: Information about the artifact (to be) downloaded for installation, using the direct URL data structure. When is_direct is true, this field is the same as the direct_url.json metadata, otherwise it represents the URL of the artifact obtained from the index or --find-links.
```
For source archives, `download_info.archive_info.hashes` may
be absent when the requirement was installed from the wheel cache
and the cache entry was populated by an older pip version that did not
record the origin URL of the downloaded artifact.
```
requested: true if the requirement was explicitly provided by the user, either directly via a command line argument or indirectly via a requirements file. false if the requirement was installed as a dependency of another requirement.
requested_extras: extras requested by the user. This field is only present when the requested field is true.

Example

The following command:

pip install \
  --ignore-installed --dry-run --quiet \
  --report - \
  "pydantic>=1.9" git+https://github.com/pypa/packaging@main

will produce an output similar to this (metadata abriged for brevity):

{
  "version": "1",
  "pip_version": "22.2",
  "install": [
    {
      "download_info": {
        "url": "https://files.pythonhosted.org/packages/a4/0c/fbaa7319dcb5eecd3484686eb5a5c5702a6445adb566f01aee6de3369bc4/pydantic-1.9.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl",
        "archive_info": {
          "hashes": {
            "sha256": "18f3e912f9ad1bdec27fb06b8198a2ccc32f201e24174cec1b3424dda605a310"
          }
        }
      },
      "is_direct": false,
      "is_yanked": false,
      "requested": true,
      "metadata": {
        "name": "pydantic",
        "version": "1.9.1",
        "requires_dist": [
          "typing-extensions (>=3.7.4.3)",
          "dataclasses (>=0.6) ; python_version < \"3.7\"",
          "python-dotenv (>=0.10.4) ; extra == 'dotenv'",
          "email-validator (>=1.0.3) ; extra == 'email'"
        ],
        "requires_python": ">=3.6.1",
        "provides_extra": [
          "dotenv",
          "email"
        ]
      }
    },
    {
      "download_info": {
        "url": "https://github.com/pypa/packaging",
        "vcs_info": {
          "vcs": "git",
          "requested_revision": "main",
          "commit_id": "4f42225e91a0be634625c09e84dd29ea82b85e27"
        }
      },
      "is_direct": true,
      "is_yanked": false,
      "requested": true,
      "metadata": {
        "name": "packaging",
        "version": "21.4.dev0",
        "requires_dist": [
          "pyparsing (!=3.0.5,>=2.0.2)"
        ],
        "requires_python": ">=3.7"
      }
    },
    {
      "download_info": {
        "url": "https://files.pythonhosted.org/packages/6c/10/a7d0fa5baea8fe7b50f448ab742f26f52b80bfca85ac2be9d35cdd9a3246/pyparsing-3.0.9-py3-none-any.whl",
        "archive_info": {
          "hashes": {
            "sha256": "5026bae9a10eeaefb61dab2f09052b9f4307d44aee4eda64b309723d8d206bbc"
          }
        }
      },
      "is_direct": false,
      "requested": false,
      "metadata": {
        "name": "pyparsing",
        "version": "3.0.9",
        "requires_dist": [
          "railroad-diagrams ; extra == \"diagrams\"",
          "jinja2 ; extra == \"diagrams\""
        ],
        "requires_python": ">=3.6.8"
      }
    },
    {
      "download_info": {
        "url": "https://files.pythonhosted.org/packages/75/e1/932e06004039dd670c9d5e1df0cd606bf46e29a28e65d5bb28e894ea29c9/typing_extensions-4.2.0-py3-none-any.whl",
        "archive_info": {
          "hashes": {
            "sha256": "6657594ee297170d19f67d55c05852a874e7eb634f4f753dbd667855e07c1708"
          }
        }
      },
      "is_direct": false,
      "requested": false,
      "metadata": {
        "name": "typing_extensions",
        "version": "4.2.0",
        "requires_python": ">=3.7"
      }
    }
  ],
  "environment": {
    "implementation_name": "cpython",
    "implementation_version": "3.10.5",
    "os_name": "posix",
    "platform_machine": "x86_64",
    "platform_release": "5.13-generic",
    "platform_system": "Linux",
    "platform_version": "...",
    "python_full_version": "3.10.5",
    "platform_python_implementation": "CPython",
    "python_version": "3.10",
    "sys_platform": "linux"
  }
}

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Installation Report

Specification

Example

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