From: Kefu Chai <tchaikov@gmail.com>
Date: Thu, 4 Aug 2022 13:52:43 +0000 (+0800)
Subject: cmake,debian: install pure python module to deb_system path
X-Git-Tag: v16.2.11~358^2~24
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=bcfe4fb8dc1fc0210ea261f7410e7092fe560f48;p=ceph.git

cmake,debian: install pure python module to deb_system path

in ubuntu 22.04 and debian unstable, the layout (scheme) for system
python module is named "deb_system", the default one is 'posix_local'.
and 'posix_local' installs python modules into paths like
usr/local/lib/python3.10/dist-packages/. hence dh_install fails
when it tries to find the files to be packaged under directory of
usr/lib/python3*/site-packages/.

in this change, the "deb_system" scheme is used if it is available,
and fall back to "posix_prefix" to be backward compatible with older
debian (derivative) distros.

also, update the source directories of pure python's installation
from `site-packages` to `*-packages`, to be compatible with ubuntu focal
and ubuntu jammy. as we are now using the specified scheme instead of
the default one.

Signed-off-by: Kefu Chai <tchaikov@gmail.com>
(cherry picked from commit 04967404ed682835f81c1a5e51f94d09805d38b3)
Conflicts:
    apply the same change to debian/python3-cephfs.install, which
    was remove in main branch, but we need to preserve it in pacific.
---

diff --git a/debian/python3-ceph-argparse.install b/debian/python3-ceph-argparse.install
index d3339be76909..52479f93535e 100755
--- a/debian/python3-ceph-argparse.install
+++ b/debian/python3-ceph-argparse.install
@@ -1,4 +1,4 @@
 #! /usr/bin/dh-exec
 
-usr/lib/python3*/site-packages/ceph_argparse.py /usr/lib/python3/dist-packages/
-usr/lib/python3*/site-packages/ceph_daemon.py /usr/lib/python3/dist-packages/
+usr/lib/python3*/*-packages/ceph_argparse.py /usr/lib/python3/dist-packages/
+usr/lib/python3*/*-packages/ceph_daemon.py /usr/lib/python3/dist-packages/
diff --git a/debian/python3-cephfs.install b/debian/python3-cephfs.install
old mode 100644
new mode 100755
index 6eb8836707f8..ac88db2211e6
--- a/debian/python3-cephfs.install
+++ b/debian/python3-cephfs.install
@@ -1,3 +1,5 @@
-usr/lib/python3*/dist-packages/ceph_volume_client.py
+#! /usr/bin/dh-exec
+
+usr/lib/python3*/*-packages/ceph_volume_client.py /usr/lib/python3/dist-packages/
 usr/lib/python3*/dist-packages/cephfs-*.egg-info
 usr/lib/python3*/dist-packages/cephfs.cpython*.so
diff --git a/src/pybind/CMakeLists.txt b/src/pybind/CMakeLists.txt
index 942af6e4966c..8b4cbf12cb67 100644
--- a/src/pybind/CMakeLists.txt
+++ b/src/pybind/CMakeLists.txt
@@ -36,6 +36,7 @@ execute_process(
     "import sysconfig;\
      print(\
      sysconfig.get_path(\
+     scheme='deb_system' in sysconfig.get_scheme_names() and 'deb_system' or 'posix_prefix',\
      name='purelib',\
      vars=\
      {'base': '${PYTHON_INSTALL_TEMPLATE}',\