pydantic-pkgr         📦 apt  brew  pip  npm  ₊₊₊
_{Simple Pydantic interfaces for package managers + installed binaries.}

This is a Python library for installing & managing packages locally with a variety of package managers.
It's designed for when pip dependencies aren't enough, and your app has to install local binaries at runtime.

pip install pydantic-pkgr

✨ Built with pydantic v2 for strong static typing guarantees and json import/export compatibility
📦 Provides consistent cross-platform interfaces for dependency resolution & installation at runtime
🌈 Supports django >= 4.0, django-ninja, and OpenAPI + django-jsonform out-of-the-box
🦄 Uses pyinfra / ansible for the actual install operations whenever possible (with internal fallbacks)

_{Built by ArchiveBox to install & auto-update our extractor dependencies at runtime (chrome, wget, curl, etc.) on macOS/Linux/Docker.}

Warning

This is ALPHA software under active development, it's not ready for production use yet.

Source Code: https://github.com/ArchiveBox/pydantic-pkgr/

Documentation: https://github.com/ArchiveBox/pydantic-pkgr/blob/main/README.md

from pydantic_pkgr import *

apt, brew, pip, npm, env = AptProvider(), BrewProvider(), PipProvider(), NpmProvider(), EnvProvider()

dependencies = [
    Binary(name='curl',       providers=[env, apt, brew]),
    Binary(name='wget',       providers=[env, apt, brew]),
    Binary(name='yt-dlp',     providers=[env, pip, apt, brew]),
    Binary(name='playwright', providers=[env, pip, npm]),
    Binary(name='puppeteer',  providers=[env, npm]),
]
for binary in dependencies:
    binary = binary.load_or_install()

    print(binary.abspath, binary.version, binary.provider, binary.is_valid)
    # Path('/usr/bin/curl') SemVer('7.81.0') 'apt' True

    binary.exec(cmd=['--version'])   # curl 7.81.0 (x86_64-apple-darwin23.0) libcurl/7.81.0 ...

from pydantic_pkgr import Binary, BinProvider, BrewProvider, EnvProvider

# you can also define binaries as classes, making them usable for type checking
class CurlBinary(Binary):
    name: str = 'curl'
    providers: list[BinProvider] = [BrewProvider(), EnvProvider()]

curl = CurlBinary().install()
assert isinstance(curl, CurlBinary)                              # CurlBinary is a unique type you can use in annotations now
print(curl.abspath, curl.version, curl.provider, curl.is_valid)  # Path('/opt/homebrew/bin/curl') SemVer('8.4.0') 'brew' True
curl.exec(cmd=['--version'])                                     # curl 8.4.0 (x86_64-apple-darwin23.0) libcurl/8.4.0 ...

from pydantic_pkgr import Binary, EnvProvider, PipProvider

# We also provide direct package manager (aka BinProvider) APIs
apt = AptProvider()
apt.install('wget')
print(apt.PATH, apt.get_abspaths('wget'), apt.get_version('wget'))

# our Binary API provides a nice type-checkable, validated, serializable handle
# even if packages are installed by tools we don't control (e.g. pyinfra/ansible/puppet/etc.)
from pyinfra.operations import apt
apt.packages(name="Install ffmpeg", packages=['ffmpeg'], _sudo=True)

ffmpeg = Binary(name='ffmpeg').load()
print(ffmpeg)                       # name=ffmpeg abspath=/usr/bin/ffmpeg version=3.3.0 is_valid=True ...
print(ffmpeg.loaded_abspaths)       # show all the ffmpeg binaries found in $PATH (in case theres more than one available)
print(ffmpeg.model_dump_json())     # ... everything can also be dumped/loaded as json
print(ffmpeg.model_json_schema())   # ... all types provide OpenAPI-ready JSON schemas

Supported Package Managers

So far it supports installing/finding installed/updating/removing packages on Linux/macOS with:

• apt (Ubuntu/Debian/etc.)
• brew (macOS/Linux)
• pip (Linux/macOS/Windows)
• npm (Linux/macOS/Windows)
• env (looks for existing version of binary in user's $PATH at runtime)
• vendor (you can bundle vendored copies of packages you depend on within your source)

Planned: docker, cargo, nix, apk, go get, gem, pkg, and more using ansible/pyinfra...

---

Usage

pip install pydantic-pkgr

BinProvider

Implementations: EnvProvider, AptProvider, BrewProvider, PipProvider, NpmProvider

This type represents a "provider of binaries", e.g. a package manager like apt/pip/npm, or env (which finds binaries in your $PATH).

BinProviders implement the following interface:

• load(bin_name: str), install(bin_name: str), load_or_install(bin_name: str) -> Binary
• get_abspaths(bin_name: str) -> [Path('/absolute/path/to/bin'), Path('/other/paths/to/bin'), ...]
• get_abspath(bin_name: str) -> Path('/absolute/path/to/bin')
• get_version(bin_name: str) -> SemVer('1.0.0')
• get_subdeps(bin_name: str) -> InstallStr('somepackage some-extras')
• @PATH -> PATHStr('/usr/local/bin:/usr/bin:/bin:...')

import platform
from typing import List
from pydantic_pkgr import EnvProvider, PipProvider, AptProvider, BrewProvider

### Example: Finding an existing install of bash using the system $PATH environment
env = EnvProvider()
bash = env.load(bin_name='bash')
print(bash.abspath)                   # Path('/opt/homebrew/bin/bash')
print(bash.version)                   # SemVer('5.2.26')
bash.exec(['-c', 'echo hi'])          # hi

### Example: Installing curl using the apt package manager
apt = AptProvider()
curl = apt.install(bin_name='curl')
print(curl.abspath)                   # Path('/usr/bin/curl')
print(curl.version)                   # SemVer('8.4.0')
curl.exec(['--version'])              # curl 7.81.0 (x86_64-pc-linux-gnu) libcurl/7.81.0 ...

### Example: Finding/Installing django with pip (w/ customized binpath resolution behavior)
pip = PipProvider(
    abspath_provider={'*': lambda bin_name, **context: inspect.getfile(bin_name)},  # use python inspect to get path instead of os.which
)
django_bin = pip.load_or_install(bin_name='django')
print(django_bin.abspath)             # Path('/usr/lib/python3.10/site-packages/django/__init__.py')
print(django_bin.version)             # SemVer('5.0.2')

Binary

This type represents a single binary dependency aka a package (e.g. wget, curl, ffmpeg, etc.).
It can define one or more BinProviders that it supports, along with overrides to customize the behavior for each.

Binarys implement the following interface:

• load(), install(), load_or_install() -> Binary
• provider: BinProviderName (BinProviderName == str)
• abspath: Path
• abspaths: List[Path]
• version: SemVer

from pydantic_pkgr import BinProvider, Binary, BinProviderName, BinName, ProviderLookupDict, SemVer

### Example: Create a re-usable class defining a binary and its providers
class YtdlpBinary(Binary):
    name: BinName = 'ytdlp'
    description: str = 'YT-DLP (Replacement for YouTube-DL) Media Downloader'

    providers_supported: List[BinProvider] = [EnvProvider(), PipProvider(), AptProvider(), BrewProvider()]
    
    # customize installed package names for specific package managers
    provider_overrides: Dict[BinProviderName, ProviderLookupDict] = {
        'pip': {'subdeps': lambda: 'yt-dlp[default,curl-cffi]'}},
        'apt': {'subdeps': lambda: 'yt-dlp ffmpeg'}},
        'brew': {'subdeps': 'some.other.module.get_brew_subdeps'}},  # also accepts dotted import path to function
    }

ytdlp = YtdlpBinary().load_or_install()
print(ytdlp.provider)                     # 'brew'
print(ytdlp.abspath)                      # Path('/opt/homebrew/bin/yt-dlp')
print(ytdlp.abspaths)                     # [Path('/opt/homebrew/bin/yt-dlp'), Path('/usr/local/bin/yt-dlp')]
print(ytdlp.version)                      # SemVer('2024.4.9')
print(ytdlp.is_valid)                     # True

from pydantic_pkgr import BinProvider, Binary, BinProviderName, BinName, ProviderLookupDict, SemVer

#### Example: Create a binary that uses Podman if available, or Docker otherwise
class DockerBinary(Binary):
    name: BinName = 'docker'

    providers_supported: List[BinProvider] = [EnvProvider(), AptProvider()]
    
    provider_overrides: Dict[BinProviderName, ProviderLookupDict] = {
        'env': {
            # example: prefer podman if installed (falling back to docker)
            'abspath': lambda: os.which('podman') or os.which('docker') or os.which('docker-ce'),
        },
        'apt': {
            # example: vary installed package name based on your CPU architecture
            'subdeps': lambda: {
                'amd64': 'docker',
                'armv7l': 'docker-ce',
                'arm64': 'docker-ce',
            }.get(platform.machine(), 'docker'),
        },
    }

docker = DockerBinary().load_or_install()
print(docker.provider)                    # 'env'
print(docker.abspath)                     # Path('/usr/local/bin/podman')
print(docker.abspaths)                    # [Path('/usr/local/bin/podman'), Path('/opt/homebrew/bin/podman')]
print(docker.version)                     # SemVer('6.0.2')
print(docker.is_valid)                    # True

# You can also pass **kwargs to override properties at runtime,
# e.g. if you want to force the abspath to be at a specific path:
custom_docker = DockerBinary(abspath='~/custom/bin/podman').load()
print(custom_docker.name)                 # 'docker'
print(custom_docker.provider)             # 'env'
print(custom_docker.abspath)              # Path('/Users/example/custom/bin/podman')
print(custom_docker.version)              # SemVer('5.0.2')
print(custom_docker.is_valid)             # True

SemVer

from pydantic_pkgr import SemVer

### Example: Use the SemVer type directly for parsing & verifying version strings
SemVer.parse('Google Chrome 124.0.6367.208+beta_234. 234.234.123')  # SemVer(124, 0, 6367')
SemVer.parse('2024.04.05)                                           # SemVer(2024, 4, 5)
SemVer.parse('1.9+beta')                                            # SemVer(1, 9, 0)
str(SemVer(1, 9, 0))                                                # '1.9.0'

These types are all meant to be used library-style to make writing your own apps easier.
e.g. you can use it to build things like: playwright install --with-deps)

---

Django Usage

The pydantic ecosystem helps us get auto-generated, type-checked Django fields & forms that support BinProvider and Binary.

Tip

For the full Django experience, we recommend installing these 3 excellent packages:

• django-admin-data-views
• django-pydantic-field
• django-jsonform
pip install pydantic-pkgr django-admin-data-views django-pydantic-field django-jsonform

Django Model Usage: Store BinProvider and Binary entries in your model fields

pip install django-pydantic-field

Fore more info see the django-pydantic-field docs...

Usage in your models.py:

from django.db import models
from django_pydantic_field import SchemaField

from pydantic_pkgr import BinProvider, EnvProvider, Binary, SemVer

env = EnvProvider()

class Dependency(models.Model):
    """Example model for storing information about a dependency"""
    name = models.CharField(max_length=63)
    binary: Binary = SchemaField()
    providers: list[BinProvider] = SchemaField(default=[env])
    min_version: SemVer = SchemaField(default=(0,0,1))

curl = Binary(name='curl', providers=[env]).load()  # find existing curl binary in $PATH

model = Dependency(                               # create a DB record with our new model to represent curl
    name='curl',
    binary=curl,                                  # store Binary/BinProvider/SemVer values directly in fields
    providers=[env],                              # no need for manual JSON serialization / schema checking
    min_version=SemVer('6.5.0'),
)
model.save()                                      
model = Dependency.objects.get(name='curl')       # everything is transparently serialized to/from the DB,
                                                  # and is ready to go immediately after querying:
print(model.binary.abspath)                       #   Path('/usr/local/bin/curl')
model.binary.exec(['--version'])                  #   curl 7.81.0 (x86_64-apple-darwin23.0) libcurl/7.81.0 ...
assert model.binary.abspath == curl.abspath == env.get_abspath('curl')
assert model.providers[0] == curl.provider == env
assert model.binary.provider == curl.provider == env

For a full example see our provided django_example_project/...

Django Admin Usage: Show read-only list of Binaries in Admin UI

pip install pydantic-pkgr django-admin-data-views

For more info see the django-admin-data-views docs...

Then add this to your settings.py:

INSTALLED_APPS = [
    # ...
    'admin_data_views'
    'pydantic_pkgr'
    # ...
]

# point these to a function that gets the list of all binaries / a single binary
PYDANTIC_PKGR_GET_ALL_BINARIES = 'pydantic_pkgr.views.get_all_binaries'
PYDANTIC_PKGR_GET_BINARY = 'pydantic_pkgr.views.get_binary'

ADMIN_DATA_VIEWS = {
    "NAME": "Environment",
    "URLS": [
        {
            "route": "binaries/",
            "view": "pydantic_pkgr.views.binaries_list_view",
            "name": "binaries",
            "items": {
                "route": "<str:key>/",
                "view": "pydantic_pkgr.views.binary_detail_view",
                "name": "binary",
            },
        },
        # Coming soon: binprovider_list_view + binprovider_detail_view ...
    ],
}

For a full example see our provided django_example_project/...

Note: If you override the default site admin, you must register the views manually...

admin.py:

class YourSiteAdmin(admin.AdminSite):
    """Your customized version of admin.AdminSite"""
    ...


custom_admin = YourSiteAdmin()
custom_admin.register(get_user_model())
...
from pydantic_pkgr.admin import register_admin_views
register_admin_views(custom_admin)

Django Admin Usage: JSONFormWidget for editing BinProvider and Binary data

Important

This feature is coming soon but is blocked on a few issues being fixed first:

• surenkov/django-pydantic-field#64
• surenkov/django-pydantic-field#65
• surenkov/django-pydantic-field#66

Install django-jsonform to get auto-generated Forms for editing BinProvider, Binary, etc. data

pip install django-pydantic-field django-jsonform

For more info see the django-jsonform docs...

admin.py:

from django.contrib import admin
from django_jsonform.widgets import JSONFormWidget
from django_pydantic_field.v2.fields import PydanticSchemaField

class MyModelAdmin(admin.ModelAdmin):
    formfield_overrides = {PydanticSchemaField: {"widget": JSONFormWidget}}

admin.site.register(MyModel, MyModelAdmin)

For a full example see our provided django_example_project/...

---

Examples

Advanced: Implement your own package manager behavior by subclassing BinProvider

from subprocess import run, PIPE

from pydantic_pkgr import BinProvider, BinProviderName, BinName, SemVer

class CargoProvider(BinProvider):
    name: BinProviderName = 'cargo'
    
    def on_setup_paths(self):
        if '~/.cargo/bin' not in sys.path:
            sys.path.append('~/.cargo/bin')

    def on_install(self, bin_name: BinName, **context):
        subdeps = self.on_get_subdeps(bin_name)
        installer_process = run(['cargo', 'install', *subdeps.split(' ')], stdout=PIPE, stderr=PIPE)
        assert installer_process.returncode == 0

    def on_get_subdeps(self, bin_name: BinName, **context) -> InstallStr:
        # optionally remap bin_names to strings passed to installer 
        # e.g. 'yt-dlp' -> 'yt-dlp ffmpeg libcffi libaac'
        return bin_name

    def on_get_abspath(self, bin_name: BinName, **context) -> Path | None:
        self.on_setup_paths()
        return Path(os.which(bin_name))

    def on_get_version(self, bin_name: BinName, **context) -> SemVer | None:
        self.on_setup_paths()
        return SemVer(run([bin_name, '--version'], stdout=PIPE).stdout.decode())

cargo = CargoProvider()
rg = cargo.install(bin_name='ripgrep')
print(rg.provider)                      # 'cargo'
print(rg.version)                       # SemVer(14, 1, 0)

---

TODO

• Implement initial basic support for apt, brew, and pip
• Provide editability and actions via Django Admin UI using django-pydantic-field and django-jsonform
• Implement update and remove actions on BinProviders
• Add preinstall and postinstall hooks for things like adding apt sources and running cleanup scripts
• Implement more package managers (cargo, gem, go get, ppm, nix, docker, etc.)
• Add Binary.min_version that affects .is_valid based on whether it meets minimum SemVer threshold

Other Packages We Like

• https://github.com/MrThearMan/django-signal-webhooks
• https://github.com/MrThearMan/django-admin-data-views
• https://github.com/lazybird/django-solo
• https://github.com/joshourisman/django-pydantic-settings
• https://github.com/surenkov/django-pydantic-field
• https://github.com/jordaneremieff/djantic