Do not use Zstd archive format with `repoctl add` after updating pacman to 5.2.0 version about repoctl HOT 6 CLOSED

$ go get -u github.com/cassava/repoctl

$ cd $GOPATH/src/github.com/cassava/repoctl

$ git checkout devel
La branche 'devel' est paramétrée pour suivre la branche distante 'devel' depuis 'origin'.
Basculement sur la nouvelle branche 'devel'

$ go install ./cmd/repoctl

$ go install ./cmd/repols

$ cd $HOME/builds/test

$ ls -1
caffeine-ng-git-3.4.2.post37+g096f31b-1-any.pkg.tar.zst
openbox-gnome-20170530-1-any.pkg.tar.xz
pokerth-1.1.2-9-x86_64.pkg.tar.xz
repo

$ ls -l repo/
total 0

$ $GO_PATH/repoctl new config ./repo/myrepo.db.tar.gz
Writing new configuration file at /home/canalguada/.config/repoctl/config.toml ...

$ $GO_PATH/repoctl add openbox-gnome-20170530-1-any.pkg.tar.xz 
copying and adding to repository: openbox-gnome-20170530-1-any.pkg.tar.xz
adding package to database: /home/canalguada/builds/test/repo/openbox-gnome-20170530-1-any.pkg.tar.xz

$ $GO_PATH/repoctl add pokerth-1.1.2-9-x86_64.pkg.tar.xz      
copying and adding to repository: pokerth-1.1.2-9-x86_64.pkg.tar.xz
adding package to database: /home/canalguada/builds/test/repo/pokerth-1.1.2-9-x86_64.pkg.tar.xz

$ $GO_PATH/repoctl add caffeine-ng-git-3.4.2.post37+g096f31b-1-any.pkg.tar.zst 
copying and adding to repository: caffeine-ng-git-3.4.2.post37+g096f31b-1-any.pkg.tar.zst
adding package to database: /home/canalguada/builds/test/repo/caffeine-ng-git-3.4.2.post37+g096f31b-1-any.pkg.tar.zst

$ $GO_PATH/repoctl add quodlibet-git-1:r10288.667aceb4c-1-any.pkg.tar.zst -m  
moving and adding to repository: quodlibet-git-1:r10288.667aceb4c-1-any.pkg.tar.zst
adding package to database: /home/canalguada/builds/test/repo/quodlibet-git-1:r10288.667aceb4c-1-any.pkg.tar.zst

$ ls -1 repo/
caffeine-ng-git-3.4.2.post37+g096f31b-1-any.pkg.tar.zst
myrepo.db
myrepo.db.tar.gz
myrepo.db.tar.gz.old
myrepo.files
myrepo.files.tar.gz
myrepo.files.tar.gz.old
openbox-gnome-20170530-1-any.pkg.tar.xz
pokerth-1.1.2-9-x86_64.pkg.tar.xz
quodlibet-git-1:r10288.667aceb4c-1-any.pkg.tar.zst

$ $GO_PATH/repols files 
/home/canalguada/builds/test/repo/caffeine-ng-git-3.4.2.post37+g096f31b-1-any.pkg.tar.zst
/home/canalguada/builds/test/repo/openbox-gnome-20170530-1-any.pkg.tar.xz
/home/canalguada/builds/test/repo/pokerth-1.1.2-9-x86_64.pkg.tar.xz
/home/canalguada/builds/test/repo/quodlibet-git-1:r10288.667aceb4c-1-any.pkg.tar.zst

$ repoctl add caffeine-ng-git-3.4.2.post37+g096f31b-1-any.pkg.tar.zst -m       
moving and adding to repository: caffeine-ng-git-3.4.2.post37+g096f31b-1-any.pkg.tar.zst
adding package to database: /home/canalguada/builds/repo/caffeine-ng-git-3.4.2.post37+g096f31b-1-any.pkg.tar.zst
error: unknown file format.
deleting: /home/canalguada/builds/repo/adementary-gtk-theme-git-1:248.7cb84a7-1-any.pkg.tar.xz
deleting: /home/canalguada/builds/repo/adwaita-qt4-1.0-1-x86_64.pkg.tar.xz
deleting: /home/canalguada/builds/repo/alpm_octopi_utils-1.0.1-1-x86_64.pkg.tar.xz
deleting: /home/canalguada/builds/repo/appmenu-gtk-module-git-0.7.3.r1.g8e8b2d0-1-x86_64.pkg.tar.xz

[many more packages files…]