1 files changed, 93 insertions, 0 deletions
diff --git a/cmd/podman/completion/completion.go b/cmd/podman/completion/completion.go
new file mode 100644
index 000000000..ead8d1f05
--- /dev/null
+++ b/cmd/podman/completion/completion.go
@@ -0,0 +1,93 @@
+package completion
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+
+	commonComp "github.com/containers/common/pkg/completion"
+	"github.com/containers/podman/v2/cmd/podman/registry"
+	"github.com/containers/podman/v2/pkg/domain/entities"
+	"github.com/spf13/cobra"
+)
+
+const (
+	completionDescription = `Generate shell autocompletions.
+  Valid arguments are bash, zsh, and fish.
+  Please refer to the man page to see how you can load these completions.`
+)
+
+var (
+	file          string
+	noDesc        bool
+	shells        = []string{"bash", "zsh", "fish"}
+	completionCmd = &cobra.Command{
+		Use:       fmt.Sprintf("completion [options] {%s}", strings.Join(shells, "|")),
+		Short:     "Generate shell autocompletions",
+		Long:      completionDescription,
+		ValidArgs: shells,
+		Args:      cobra.ExactValidArgs(1),
+		RunE:      completion,
+		Example: `podman completion bash
+  podman completion zsh -f _podman
+  podman completion fish --no-desc`,
+		//dont show this command to users
+		Hidden: true,
+	}
+)
+
+func init() {
+	registry.Commands = append(registry.Commands, registry.CliCommand{
+		Mode:    []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
+		Command: completionCmd,
+	})
+	flags := completionCmd.Flags()
+	fileFlagName := "file"
+	flags.StringVarP(&file, fileFlagName, "f", "", "Output the completion to file rather than stdout.")
+	_ = completionCmd.RegisterFlagCompletionFunc(fileFlagName, commonComp.AutocompleteDefault)
+
+	flags.BoolVar(&noDesc, "no-desc", false, "Don't include descriptions in the completion output.")
+}
+
+func completion(cmd *cobra.Command, args []string) error {
+	var w io.Writer
+
+	if file != "" {
+		file, err := os.Create(file)
+		if err != nil {
+			return err
+		}
+		defer file.Close()
+		w = file
+	} else {
+		w = os.Stdout
+	}
+
+	var err error
+	switch args[0] {
+	case "bash":
+		if noDesc {
+			err = cmd.Root().GenBashCompletion(w)
+		} else {
+			err = cmd.Root().GenBashCompletionWithDesc(w)
+		}
+	case "zsh":
+		if noDesc {
+			err = cmd.Root().GenZshCompletionNoDesc(w)
+		} else {
+			err = cmd.Root().GenZshCompletion(w)
+		}
+	case "fish":
+		err = cmd.Root().GenFishCompletion(w, !noDesc)
+	}
+
+	if err != nil {
+		return err
+	}
+
+	_, err = io.WriteString(w, fmt.Sprintf(
+		"\n# This file is generated with %q; see: podman-completion(1)\n", cmd.CommandPath(),
+	))
+	return err
+}