re: https://lists.parabola.nu/pipermail/assist/2019-October/001406.html

i will assume that this request is for the GUI client
'seafile-client'? - the 'seafile' package is just the client
daemon

the seafile system appears to be fairly popular on AUR with
plugins for dolphin and nautilus; and at first glance, the
licensing seems to be acceptable - i would suggest that the
discussion includes the other related programs, at least the
server

core software:

• seafile
  - (GPLv2 with OpenSSL linking exception)
  - client daemon
• seafile-client
  - (apache-v2)
  - GUI client
• seafile-server
  - (AGPLv3 with OpenSSL linking exception)
  - server
• seahub
  - (dubious)
  - web interface

tools and integrations:

• ccnet-server
  - (GPLv2)
  - dependency of seafile, seafile-server
• libevhtp-seafile
  - (BSD-3clause)
  - dependency of seafile-server
• dolphin-seafile-plugin
  - (BSD-3clause)
  - dolphin plugin for seafile daemon
• mingw-w64-seafile-shared
  - (GPLv2)
  - win64 bindings from same codebase as 'seafile'
• nautilus-seafile
  - (dubious)
  - (supposedly) nautilus plugin for seafile daemon
• python-radicale-auth-seafile
  - (GPLv3)
  - unclear how this relates
• python2-seafobj
  - (apache-v2)
  - dependency of seahub
• python2-wsgidav-seafile
  - (MIT)
  - dependency of seahub
• seafile-helper
  - (GPLv3)
  - server install/config helper

NOTE: the 'seahub' sources have a apache-v2 license, but include
3rd-party code under other licenses, most notably GPL, which
probably makes the program GPL effectively

NOTE: 'seahub' has many python dependencies, many of which are
likely to not be packaged in arch - i did not look into any of
those

NOTE: 'python-radicale-auth-seafile' neither depends on nor is
required by anything related to seafile - its not clear what its
purpose is

NOTE: the 'nautilus-seafile' AUR package looks a bit fishy - it
is apparently nothing more than a fork of the upstream
'seafile-client'; but 415 commits behind - the PKGBUILD has a
broken upstream URL, and denotes the license as GPL where the
source code has an apache LICENSE