Ceph

the ceph-volume build venv is not being (re)created after a fresh clone of the github repo (or removal of the build dir)

$ git clone https://github.com/ceph/ceph
$ cd ceph
$ git submodule update --init --recursive
$ ./install-deps.sh && ./do_cmake.sh && cd build && ninja vstart

<snip>

[99/1302] ceph-volume venv is being created
/root/ceph/src/tools/setup-virtualenv.sh: line 60: -m: command not found
/root/ceph/src/tools/setup-virtualenv.sh: line 61: /root/ceph/build/ceph-volume-virtualenv/bin/activate: No such file or directory
Requirement already satisfied: pip>=6.1 in /usr/local/lib/python3.8/site-packages (21.2.4)
WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
Requirement already satisfied: tox>=2.9.1 in /usr/lib/python3.8/site-packages (3.21.1)
Requirement already satisfied: six>=1.14.0 in /usr/lib/python3.8/site-packages (from tox>=2.9.1) (1.16.0)
Requirement already satisfied: filelock>=3.0.0 in /usr/lib/python3.8/site-packages (from tox>=2.9.1) (3.0.12)
Requirement already satisfied: toml>=0.9.4 in /usr/lib/python3.8/site-packages (from tox>=2.9.1) (0.10.2)
Requirement already satisfied: py>=1.4.17 in /usr/lib/python3.8/site-packages (from tox>=2.9.1) (1.10.0)
Requirement already satisfied: pluggy>=0.12.0 in /usr/lib/python3.8/site-packages (from tox>=2.9.1) (0.13.1)
Requirement already satisfied: virtualenv!=20.0.0,!=20.0.1,!=20.0.2,!=20.0.3,!=20.0.4,!=20.0.5,!=20.0.6,!=20.0.7,>=16.0.0 in /usr/lib/python3.8/site-packages (from tox>=2.9.1) (20.2.2)
Requirement already satisfied: packaging>=14 in /usr/lib/python3.8/site-packages (from tox>=2.9.1) (20.9)
Requirement already satisfied: pyparsing>=2.0.2 in /usr/lib/python3.8/site-packages (from packaging>=14->tox>=2.9.1) (2.4.7)
Requirement already satisfied: appdirs<2,>=1.4.3 in /usr/lib/python3.8/site-packages (from virtualenv!=20.0.0,!=20.0.1,!=20.0.2,!=20.0.3,!=20.0.4,!=20.0.5,!=20.0.6,!=20.0.7,>=16.0.0->tox>=2.9.1) (1.4.4)
Requirement already satisfied: distlib<1,>=0.3.1 in /usr/lib/python3.8/site-packages (from virtualenv!=20.0.0,!=20.0.1,!=20.0.2,!=20.0.3,!=20.0.4,!=20.0.5,!=20.0.6,!=20.0.7,>=16.0.0->tox>=2.9.1) (0.3.1)
WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
[100/1302] /root/ceph/src/ceph-volume
FAILED: ceph-volume-virtualenv/bin/ceph-volume /root/ceph/build/ceph-volume-virtualenv/bin/ceph-volume 
cd /root/ceph/src/ceph-volume && . /root/ceph/build/ceph-volume-virtualenv/bin/activate && /root/ceph/build/ceph-volume-virtualenv/bin/python setup.py develop && deactivate
/bin/sh: line 1: /root/ceph/build/ceph-volume-virtualenv/bin/activate: No such file or directory