Add support for podman context as alias to podman system connection

Alias
podman --context -> podman --connection
podman context use -> podman system connection default
podman context rm -> podman system connection rm
podman context create -> podman system connection add
podman context ls ->podman system connection ls
podman context inspect ->podman system connection ls --json (For
specified connections)

Podman context is a hidden command, but can be used for existing scripts
that assume Docker under the covers.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/cmd/podman/system/context.go b/cmd/podman/system/context.go
new file mode 100644
index 000000000..926e4a443
--- /dev/null
+++ b/cmd/podman/system/context.go
@@ -0,0 +1,28 @@
+package system
+
+import (
+	"github.com/containers/podman/v4/cmd/podman/registry"
+	"github.com/containers/podman/v4/cmd/podman/validate"
+	"github.com/spf13/cobra"
+)
+
+var (
+	// ContextCmd skips creating engines (PersistentPreRunE/PersistentPostRunE are No-Op's) since
+	// sub-commands will obtain connection information to said engines
+	ContextCmd = &cobra.Command{
+		Use:                "context",
+		Short:              "Manage remote API service destinations",
+		Long:               `Manage remote API service destination information in podman configuration`,
+		PersistentPreRunE:  validate.NoOp,
+		RunE:               validate.SubCommandExists,
+		PersistentPostRunE: validate.NoOp,
+		Hidden:             true,
+		TraverseChildren:   false,
+	}
+)
+
+func init() {
+	registry.Commands = append(registry.Commands, registry.CliCommand{
+		Command: ContextCmd,
+	})
+}