[MacPorts] #39272: `-p` flag for `port` command doesn't play nice with errors resulting from mismatched requested variants vs. originally-selected variants

[MacPorts]

#39272: `-p` flag for `port` command doesn't play nice with errors resulting from
mismatched requested variants vs. originally-selected variants
---------------------+--------------------------------
 Reporter:  egall@…  |      Owner:  macports-tickets@…
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  base     |    Version:  2.1.3
 Keywords:           |       Port:
---------------------+--------------------------------
 Often times I'll be installing a bunch of ports, and then MacPorts will
 try to install a port as a dependency with different variants than I had
 originally selected, for example:
 {{{

 --->  Dependencies to be installed: git-core curl gtk2 atk gobject-
 introspection gdk-pixbuf2 jasper shared-mime-info xorg-libXdamage libgee
 librsvg libart_lgpl libcroco libgsf poppler openjpeg15 poppler-data
 DEBUG: Starting logging for curl
 DEBUG: changing euid/egid - current euid: 0 - current egid: 0
 DEBUG: egid changed to: 501
 DEBUG: euid changed to: 502
 Error: Requested variants "+ssl+universal" do not match original selection
 "+ares+metalink+sftp_scp+ssl+universal".
 Please use the same variants again, perform 'port clean curl' or specify
 the force option (-f).
 Error: Failed to install curl
 DEBUG: Registry error: poppler-data not registered as installed & active.
     invoked from within
 "registry_active ${subport}"
     invoked from within
 "$workername eval registry_active \${subport}"
 Please see the log file for port curl for details:
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_net_curl/curl/main.log
 Error: The following dependencies were not installed: git-core curl gtk2
 atk gobject-introspection gdk-pixbuf2 jasper shared-mime-info xorg-
 libXdamage libgee librsvg libart_lgpl libcroco libgsf poppler openjpeg15
 poppler-data
 }}}
 After that, MacPorts will continue to try to install ports, because I had
 the `-p` flag selected, but they all fail with the following message:
 {{{

 DEBUG: could not set effective gid to 501
     while executing
 "setegid $egid"
     (procedure "chownAsRoot" line 7)
     invoked from within
 "chownAsRoot $subbuildpath"
     (procedure "open_statefile" line 29)
     invoked from within
 "open_statefile"
     (procedure "check_variants" line 29)
     invoked from within
 "check_variants activate"
     invoked from within
 "$workername eval check_variants $target"
     (procedure "mportexec" line 7)
     invoked from within
 "mportexec $workername $target"
 Error: Unable to execute port: could not set effective gid to 501
 }}}
 This behavior is not consistent with the behavior described in the manpage
 for port(1) for its `-p` flag:
 {{{
 -p       Despite any errors encountered, proceed to process multiple ports
 and commands.
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/39272>
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