V2 enable ps tests

* Combine cobra.Command helper functions into validate package
  from registry and common packages
* Introduce ChoiceValue for flags

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

1 files changed, 32 insertions, 0 deletions

diff --git a/cmd/podman/validate/args.go b/cmd/podman/validate/args.go
new file mode 100644
index 000000000..14b4d7897
--- /dev/null
+++ b/cmd/podman/validate/args.go
@@ -0,0 +1,32 @@
+package validate
+
+import (
+	"fmt"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+// NoArgs returns an error if any args are included.
+func NoArgs(cmd *cobra.Command, args []string) error {
+	if len(args) > 0 {
+		return fmt.Errorf("`%s` takes no arguments", cmd.CommandPath())
+	}
+	return nil
+}
+
+// SubCommandExists returns an error if no sub command is provided
+func SubCommandExists(cmd *cobra.Command, args []string) error {
+	if len(args) > 0 {
+		return errors.Errorf("unrecognized command `%[1]s %[2]s`\nTry '%[1]s --help' for more information.", cmd.CommandPath(), args[0])
+	}
+	return errors.Errorf("missing command '%[1]s COMMAND'\nTry '%[1]s --help' for more information.", cmd.CommandPath())
+}
+
+// IdOrLatestArgs used to validate a nameOrId was provided or the "--latest" flag
+func IdOrLatestArgs(cmd *cobra.Command, args []string) error {
+	if len(args) > 1 || (len(args) == 0 && !cmd.Flag("latest").Changed) {
+		return fmt.Errorf("`%s` requires a name, id  or the \"--latest\" flag", cmd.CommandPath())
+	}
+	return nil
+}