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podman image scp remote support & podman image scp tagging

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add support for podman-remote image scp as well as direct access via the API. This entailed
a full rework of the layering of image scp functions as well as the usual API plugging and type creation

also, implemented podman image scp tagging. which makes the syntax much more readable and allows users t tag the new image
they are loading to the local/remote machine:

allow users to pass a "new name" for the image they are transferring
`podman tag` as implemented creates a new image im `image list` when tagging, so this does the same
meaning that when transferring images with tags, podman on the remote machine/user will load two images
ex: `podman image scp computer1::alpine computer2::foobar` creates alpine:latest and localhost/foobar on the remote host

implementing tags means removal of the flexible syntax. In the currently released podman image scp, the user can either specify
`podman image scp source::img dest::` or `podman image scp dest:: source::img`. However, with tags this task becomes really hard to check
which is the image (src) and which is the new tag (dst). Removal of that streamlines the arg parsing process

Signed-off-by: Charlie Doern <cdoern@redhat.com>
This commit is contained in:
cdoern
2022-05-23 14:12:48 -04:00
committed by Charlie Doern
parent c66a489b75
commit 6d3520e8b7
25 changed files with 898 additions and 675 deletions
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24
utils/utils.go
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@@ -243,27 +243,3 @@ func MovePauseProcessToScope(pausePidPath string) {
}
}
}
// CreateSCPCommand takes an existing command, appends the given arguments and returns a configured podman command for image scp
func CreateSCPCommand(cmd *exec.Cmd, command []string) *exec.Cmd {
cmd.Args = append(cmd.Args, command...)
cmd.Env = os.Environ()
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
return cmd
}
// LoginUser starts the user process on the host so that image scp can use systemd-run
func LoginUser(user string) (*exec.Cmd, error) {
sleep, err := exec.LookPath("sleep")
if err != nil {
return nil, err
}
machinectl, err := exec.LookPath("machinectl")
if err != nil {
return nil, err
}
cmd := exec.Command(machinectl, "shell", "-q", user+"@.host", sleep, "inf")
err = cmd.Start()
return cmd, err
}