zenlib 0.4.37: install fails with 'Unexpected github tarball extract' error

[galsondor (Scott G. Ainsworth)]

zenlib install fails with 'Unexpected github tarball extract' error. Consequently, upgrading MediaInfo also fails. Log extract follows:

:debug:fetch Executing org.macports.fetch (zenlib)
:info:fetch --->  zenlib-0.4.37.tar.gz does not exist in /opt/local/var/macports/distfiles/zenlib
:notice:fetch --->  Attempting to fetch zenlib-0.4.37.tar.gz from https://github.com/MediaArea/zenlib/tarball/v0.4.37
:debug:fetch Privilege de-escalation not attempted as not running as root.
:debug:checksum checksum phase started at Tue Nov  7 20:39:32 EST 2017
:notice:checksum --->  Verifying checksums for zenlib
:debug:checksum Executing org.macports.checksum (zenlib)
:info:checksum --->  Checksumming zenlib-0.4.37.tar.gz
:debug:checksum Calculated (rmd160) is 6a63cee70db36bede15172fe06684905e92d3691
:debug:checksum Correct (rmd160) checksum for zenlib-0.4.37.tar.gz
:debug:checksum Calculated (sha256) is e3bf6441c8139c7421c4f1d65e59681c9b8beb029d67bb8fbca390e6950802ae
:debug:checksum Correct (sha256) checksum for zenlib-0.4.37.tar.gz
:debug:checksum Privilege de-escalation not attempted as not running as root.
:debug:extract extract phase started at Tue Nov  7 20:39:32 EST 2017
:notice:extract --->  Extracting zenlib
:debug:extract Executing org.macports.extract (zenlib)
:info:extract --->  Extracting zenlib-0.4.37.tar.gz
:debug:extract setting option extract.args to '/opt/local/var/macports/distfiles/zenlib/zenlib-0.4.37.tar.gz'
:debug:extract Environment:
:debug:extract CC_PRINT_OPTIONS='YES'
:debug:extract CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_zenlib/zenlib/work/.CC_PRINT_OPTIONS'
:debug:extract CPATH='/opt/local/include'
:debug:extract LIBRARY_PATH='/opt/local/lib'
:debug:extract MACOSX_DEPLOYMENT_TARGET='10.13'
:info:extract Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_zenlib/zenlib/work" && /usr/bin/gzip -dc '/opt/local/var/macports/distfiles/zenlib/zenlib-0.4.37.tar.gz' | /usr/bin/tar -xf -
:debug:extract system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_zenlib/zenlib/work" && /usr/bin/gzip -dc '/opt/local/var/macports/distfiles/zenlib/zenlib-0.4.37.tar.gz' | /usr/bin/tar -xf -
:debug:extract euid/egid changed to: 0/0
:debug:extract chowned /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_zenlib/zenlib/work to macports
:debug:extract euid/egid changed to: 502/501
:debug:extract Executing proc-post-org.macports.extract-extract-0
:error:extract
:error:extract
:error:extract github PortGroup: Error: tarball name is not as expected. This might mean that the repository name is different than set in the Portfile. Please review and try to correct.

[ctreleaven (Craig Treleaven)]

Could you please attach the full main log?

[ctreleaven (Craig Treleaven)]

In 3fa71ac8adb4f6e44e3683193da695431e5c7cc4/macports-ports:

zenlib, mediainfolib, mediainfo: fix CamelCase (try ​https://github.com/macports/macports-ports/pull/2)

Ryan Schmidt identified that github.setup must be the same lower/Upper case as on github.

fixes: #55276