[MacPorts] #58203: py37-idna fails to install (no destroy found)

[MacPorts]

#58203: py37-idna fails to install (no destroy found)
------------------------+-----------------------
 Reporter:  mouse07410  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  py37-idna
------------------------+-----------------------
 MacOS Mojave 10.14.3, Xcode-10.1, Macports-installed python-3.7
 (everything up to date)


 {{{
 $ sudo port upgrade outdated && sudo port uninstall inactive
 --->  Computing dependencies for py37-idna
 --->  Installing py37-idna @2.8_0
 Error: Failed to install py37-idna: no destroot found at:
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports
 .org_release_tarballs_ports_python_py-idna/py37-idna/work/destroot
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports
 .org_release_tarballs_ports_python_py-idna/py37-idna/main.log for details.
 Error: Problem while installing py37-idna
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 }}}

 Appears to be a collision between what Python-3.7 installs (other
 packages, pip-3.7) and what Macports does.

 Attempts to activate {{{py37-idna}}} manually fail:

 {{{
 $ sudo port -f activate py37-idna
 Error: port activate failed: Registry error: py37-idna is not installed.
 $
 }}}

 Basically, I only need this for {{{py37-sphinx}}}, and I'd be happy to
 keep even sphinx under PIP - question is how.

-- 
Ticket URL: <https://trac.macports.org/ticket/58203>
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