podman cp container:dir_path/. existing_dir/ not working as expected

[jvillal-amp]

/kind bug

Description
The docker docs https://docs.docker.com/engine/reference/commandline/cp/ say that when copying and the SRC_PATH ends with "/." and the DEST_PATH is a directory that it will copy the contents of SRC_PATH to DEST_PATH.

Podman is copying the SRC_PATH to DEST_PATH and not the contents of SRC_PATH.

For example I do:

$ podman cp --pause=false gracious_goodall:/root/. ~/output/
$ ls ~/output/
root

Which is not working as the 'docker cp' documentation says it should be. It should copy the "contents" of the /root/ directory and not the directory (including the directory name).

Output of podman version:

Version:            1.6.2
RemoteAPI Version:  1
Go Version:         go1.13.1
OS/Arch:            linux/amd64

Output of podman info --debug:

debug:
  compiler: gc
  git commit: ""
  go version: go1.13.1
  podman version: 1.6.2
host:
  BuildahVersion: 1.11.3
  CgroupVersion: v2
  Conmon:
    package: conmon-2.0.2-1.fc31.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.0.2, commit: 186a550ba0866ce799d74006dab97969a2107979'
  Distribution:
    distribution: fedora
    version: "31"
  IDMappings:
    gidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
    uidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
  MemFree: 8913248256
  MemTotal: 16803119104
  OCIRuntime:
    name: crun
    package: crun-0.10.5-2.fc31.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 0.10.5
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +YAJL
  SwapFree: 8386244608
  SwapTotal: 8469344256
  arch: amd64
  cpus: 24
  eventlogger: journald
  hostname: jlvillal-devel
  kernel: 5.3.7-301.fc31.x86_64
  os: linux
  rootless: true
  slirp4netns:
    Executable: /usr/bin/slirp4netns
    Package: slirp4netns-0.4.0-20.1.dev.gitbbd6f25.fc31.x86_64
    Version: |-
      slirp4netns version 0.4.0-beta.3+dev
      commit: bbd6f25c70d5db2a1cd3bfb0416a8db99a75ed7e
  uptime: 1097h 32m 1.89s (Approximately 45.71 days)
registries:
  blocked: null
  insecure: null
  search:
  - docker.io
  - registry.fedoraproject.org
  - quay.io
  - registry.access.redhat.com
  - registry.centos.org
store:
  ConfigFile: /home/jlvillal/.config/containers/storage.conf
  ContainerStore:
    number: 19
  GraphDriverName: overlay
  GraphOptions:
    overlay.mount_program:
      Executable: /usr/bin/fuse-overlayfs
      Package: fuse-overlayfs-0.6.5-2.fc31.x86_64
      Version: |-
        fusermount3 version: 3.6.2
        fuse-overlayfs: version 0.6.5
        FUSE library version 3.6.2
        using FUSE kernel interface version 7.29
  GraphRoot: /home/jlvillal/.local/share/containers/storage
  GraphStatus:
    Backing Filesystem: extfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Using metacopy: "false"
  ImageStore:
    number: 51
  RunRoot: /run/user/1000
  VolumePath: /home/jlvillal/.local/share/containers/storage/volumes

Package info (e.g. output of rpm -q podman or apt list podman):

podman-1.6.2-2.fc31.x86_64