[WIP] Refactor podman system connection

* Add support to manage multiple connections
  * Add connection
  * Remove connection
  * Rename connection
  * Set connection as default
  * Add markdown/man pages
* Fix recursion in hack/xref-helpmsgs-manpages

Signed-off-by: Jhon Honce <jhonce@redhat.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/cmd/podman/system/connection/default.go b/cmd/podman/system/connection/default.go
new file mode 100644
index 000000000..b85343dc2
--- /dev/null
+++ b/cmd/podman/system/connection/default.go
@@ -0,0 +1,46 @@
+package connection
+
+import (
+	"fmt"
+
+	"github.com/containers/common/pkg/config"
+	"github.com/containers/libpod/v2/cmd/podman/registry"
+	"github.com/containers/libpod/v2/cmd/podman/system"
+	"github.com/containers/libpod/v2/pkg/domain/entities"
+	"github.com/spf13/cobra"
+)
+
+var (
+	// Skip creating engines since this command will obtain connection information to said engines
+	dfltCmd = &cobra.Command{
+		Use:                   "default NAME",
+		Args:                  cobra.ExactArgs(1),
+		Short:                 "Set named destination as default",
+		Long:                  `Set named destination as default for the Podman service`,
+		DisableFlagsInUseLine: true,
+		RunE:                  defaultRunE,
+		Example:               `podman system connection default testing`,
+	}
+)
+
+func init() {
+	registry.Commands = append(registry.Commands, registry.CliCommand{
+		Mode:    []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
+		Command: dfltCmd,
+		Parent:  system.ConnectionCmd,
+	})
+}
+
+func defaultRunE(cmd *cobra.Command, args []string) error {
+	cfg, err := config.ReadCustomConfig()
+	if err != nil {
+		return err
+	}
+
+	if _, found := cfg.Engine.ServiceDestinations[args[0]]; !found {
+		return fmt.Errorf("%q destination is not defined. See \"podman system connection add ...\" to create a connection", args[0])
+	}
+
+	cfg.Engine.ActiveService = args[0]
+	return cfg.Write()
+}