2 files changed, 129 insertions, 2 deletions

diff --git a/cmd/podman/validate/args.go b/cmd/podman/validate/args.go
index d170447ee..a33f47959 100644
--- a/cmd/podman/validate/args.go
+++ b/cmd/podman/validate/args.go
@@ -2,6 +2,7 @@ package validate
 
 import (
 	"fmt"
+	"strconv"
 
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
@@ -28,8 +29,119 @@ func IDOrLatestArgs(cmd *cobra.Command, args []string) error {
 	if len(args) > 1 {
 		return fmt.Errorf("`%s` accepts at most one argument", cmd.CommandPath())
 	}
-	if len(args) == 0 && !cmd.Flag("latest").Changed {
-		return fmt.Errorf("`%s` requires a name, id, or the \"--latest\" flag", cmd.CommandPath())
+
+	latest := cmd.Flag("latest")
+	if latest != nil {
+		given, _ := strconv.ParseBool(cmd.Flag("latest").Value.String())
+		if len(args) == 0 && !given {
+			return fmt.Errorf("%q requires a name, id, or the \"--latest\" flag", cmd.CommandPath())
+		}
+	}
+	return nil
+}
+
+// TODO: the two functions CheckAllLatestAndCIDFile and CheckAllLatestAndPodIDFile are almost identical.
+//       It may be worth looking into generalizing the two a bit more and share code but time is scarce and
+//       we only live once.
+
+// CheckAllLatestAndCIDFile checks that --all and --latest are used correctly.
+// If cidfile is set, also check for the --cidfile flag.
+func CheckAllLatestAndCIDFile(c *cobra.Command, args []string, ignoreArgLen bool, cidfile bool) error {
+	argLen := len(args)
+	if c.Flags().Lookup("all") == nil || c.Flags().Lookup("latest") == nil {
+		if !cidfile {
+			return errors.New("unable to lookup values for 'latest' or 'all'")
+		} else if c.Flags().Lookup("cidfile") == nil {
+			return errors.New("unable to lookup values for 'latest', 'all' or 'cidfile'")
+		}
+	}
+
+	specifiedAll, _ := c.Flags().GetBool("all")
+	specifiedLatest, _ := c.Flags().GetBool("latest")
+	specifiedCIDFile := false
+	if cid, _ := c.Flags().GetStringArray("cidfile"); len(cid) > 0 {
+		specifiedCIDFile = true
+	}
+
+	if specifiedCIDFile && (specifiedAll || specifiedLatest) {
+		return errors.Errorf("--all, --latest and --cidfile cannot be used together")
+	} else if specifiedAll && specifiedLatest {
+		return errors.Errorf("--all and --latest cannot be used together")
+	}
+
+	if (argLen > 0) && specifiedAll {
+		return errors.Errorf("no arguments are needed with --all")
+	}
+
+	if ignoreArgLen {
+		return nil
+	}
+
+	if argLen > 0 {
+		if specifiedLatest {
+			return errors.Errorf("no arguments are needed with --latest")
+		} else if cidfile && (specifiedLatest || specifiedCIDFile) {
+			return errors.Errorf("no arguments are needed with --latest or --cidfile")
+		}
+	}
+
+	if specifiedCIDFile {
+		return nil
+	}
+
+	if argLen < 1 && !specifiedAll && !specifiedLatest && !specifiedCIDFile {
+		return errors.Errorf("you must provide at least one name or id")
+	}
+	return nil
+}
+
+// CheckAllLatestAndPodIDFile checks that --all and --latest are used correctly.
+// If withIDFile is set, also check for the --pod-id-file flag.
+func CheckAllLatestAndPodIDFile(c *cobra.Command, args []string, ignoreArgLen bool, withIDFile bool) error {
+	argLen := len(args)
+	if c.Flags().Lookup("all") == nil || c.Flags().Lookup("latest") == nil {
+		if !withIDFile {
+			return errors.New("unable to lookup values for 'latest' or 'all'")
+		} else if c.Flags().Lookup("pod-id-file") == nil {
+			return errors.New("unable to lookup values for 'latest', 'all' or 'pod-id-file'")
+		}
+	}
+
+	specifiedAll, _ := c.Flags().GetBool("all")
+	specifiedLatest, _ := c.Flags().GetBool("latest")
+	specifiedPodIDFile := false
+	if pid, _ := c.Flags().GetStringArray("pod-id-file"); len(pid) > 0 {
+		specifiedPodIDFile = true
+	}
+
+	if specifiedPodIDFile && (specifiedAll || specifiedLatest) {
+		return errors.Errorf("--all, --latest and --pod-id-file cannot be used together")
+	} else if specifiedAll && specifiedLatest {
+		return errors.Errorf("--all and --latest cannot be used together")
+	}
+
+	if (argLen > 0) && specifiedAll {
+		return errors.Errorf("no arguments are needed with --all")
+	}
+
+	if ignoreArgLen {
+		return nil
+	}
+
+	if argLen > 0 {
+		if specifiedLatest {
+			return errors.Errorf("no arguments are needed with --latest")
+		} else if withIDFile && (specifiedLatest || specifiedPodIDFile) {
+			return errors.Errorf("no arguments are needed with --latest or --pod-id-file")
+		}
+	}
+
+	if specifiedPodIDFile {
+		return nil
+	}
+
+	if argLen < 1 && !specifiedAll && !specifiedLatest && !specifiedPodIDFile {
+		return errors.Errorf("you must provide at least one name or id")
 	}
 	return nil
 }
diff --git a/cmd/podman/validate/latest.go b/cmd/podman/validate/latest.go
new file mode 100644
index 000000000..6e2aa063b
--- /dev/null
+++ b/cmd/podman/validate/latest.go
@@ -0,0 +1,15 @@
+package validate
+
+import (
+	"github.com/containers/libpod/cmd/podman/registry"
+	"github.com/spf13/cobra"
+)
+
+func AddLatestFlag(cmd *cobra.Command, b *bool) {
+	// Initialization flag verification
+	cmd.Flags().BoolVarP(b, "latest", "l", false,
+		"Act on the latest container podman is aware of\nNot supported with the \"--remote\" flag")
+	if registry.IsRemote() {
+		_ = cmd.Flags().MarkHidden("latest")
+	}
+}