Can not remove the new MacPorts Mojave package

[Dr M J Carter]

On Sat, Nov 10, 2018 at 03:47:26PM -0600, Ryan Schmidt wrote:

> You could also have the script run `lsof | grep /opt/local` to see
> what files in /opt/local/are still open at the time of the
> failure.
[snip]
> Xcode also loves to spawn its simulator service, even though, as far
> as I know, MacPorts doesn't make use of it. Maybe the simulator
> service in Xcode 10 is doing things with the preferences directory
> that it did not on previous versions.

Well suggested.  Once I removed the "killall -u macports" in the
Makefiles and broadened the diagnostics, I found the following, which
survived into an interactive session:

$ sudo lsof | grep /opt/local
[snip]
com.apple 85084           macports    7r      DIR                1,4         96 26913415 /opt/local/var/macports/home/Library

$ ps auxww | grep -i com.apple
[snipissimo]
macports         85084   0.0  0.1  4854824  14384   ??  S     2:27pm   0:01.08 /Library/Developer/PrivateFrameworks/CoreSimulator.framework/Versions/A/XPCServices/com.apple.CoreSimulator.CoreSimulatorService.xpc/Contents/MacOS/com.apple.CoreSimulator.CoreSimulatorService

.... Bingo, for sufficiently provisional values of Bing.  Much thought
needed on which of several approaches to take next, and I'll need to
guard against premature rejoicing, but it's the first substative Clue
I've seen yet.  Wish me luck, folks.

PS: There were also odd icon files under /opt/local/libexec/qt5 which
iconserviceagent was holding open (from a console login by sysadmin),
but /opt/local/libexec no longer existed.  I'll worry about whether
that matters later; one problem at a time.

-- 
Dr Martin J Carter
Computer System Administrator
Astrophysics, University of Oxford