soufi 2026.3.12

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Soufi (Source Finder) is a library that finds downloadable URLs for source packages, given the binary package name and version. It will also create a compressed archive of multiple downloadable files, or save any existing downloadable archive.

Currently supported finders are:

• Debian OS packages

• Ubuntu OS packages

• Red Hat (UBI) packages

• CentOS packages

• Alpine packages

• Photon OS packages

• AlmaLinux OS packages

• NPM packages

• Python sdists

• Golang modules

• Java JARs

• Ruby Gems

• Rust Crates

• PHP PECL packages

• PHP Composer packages

If you want to download Alpine packages, you must have git installed.

Requirements

Soufi is currently tested on Python versions 3.8 through 3.12. It is known not to work on 3.6.

Quickstart

Install Soufi with pip:

pip install soufi

or, with the command-line tool:

pip install soufi[cli]

Using the command line

soufi python flask 2.0.0
https://files.pythonhosted.org/packages/37/6d/61637b8981e76a9256fade8ce7677e86a6edcd6d4525f459a6b9edbd96a4/Flask-2.0.0.tar.gz

soufi debian zlib1g 1:1.2.11.dfsg-1 -o zlib.tar.xz
zlib_1.2.11.dfsg.orig.tar.gz: https://snapshot.debian.org/file/1b7f6963ccfb7262a6c9d88894d3a30ff2bf2e23
zlib_1.2.11.dfsg-1.dsc: https://snapshot.debian.org/file/f2bea8c346668d301c0c7745f75cf560f2755649
zlib_1.2.11.dfsg-1.debian.tar.xz: https://snapshot.debian.org/file/c3b2bac9b1927fde66b72d4f98e4063ce0b51f34

ls -l zlib.tar.xz
-rw-rw-r-- 1 juledwar juledwar 391740 May 20 15:20 zlib.tar.xz

Using the API

import shutil
import soufi

finder = soufi.finder.factory(
    'python', 'flask', '2.0.0', soufi.finder.SourceType.python
)
source = finder.find()
print(source)

finder = soufi.finder.factory(
    'debian', 'zlib1g', '1:1.2.11.dfsg-1', soufi.finder.SourceType.os
)
source = finder.find()
print(source)
with source.make_archive() as archive, open('zlib.tar.xz', 'wb') as local:
    shutil.filecopyobj(archive, local)

Caching

Soufi uses dogpile.cache to provide a convenient mechanism for caching requests when doing repeated lookups. For sources with network-intensive remote discovery (e.g,, DNF/Yum-based OSes) this is strongly recommended.

For a single-threaded application, an in-memory LRU cache, should be adequate:

import pylru
import soufi

LRU_CACHE = pylru.lrucache(size=1024)
finder = soufi.finder.factory(
    'centos', 'cracklib-dicts', '2.9.0-11.el7', soufi.finder.SourceType.os,
    cache_backend='dogpile.cache.memory',
    cache_args=dict(cache_dict=LRU_CACHE),
)
print(finder.find())
# Re-using the finder will use cached results
print(finder.find('vim-minimal', '7.4.629-8.el7_9'))

More complex applications can use the other backends, e.g., memcached, Redis, custom backends, etc. See the dogpile.cache documentation for details on backend configuration.

Copyright

Soufi is copyright (c) 2021-2024 Cisco Systems, Inc. and its affiliates All rights reserved.