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remove.go
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remove.go
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package context
import (
"fmt"
"os"
"strings"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/docker/errdefs"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
// RemoveOptions are the options used to remove contexts
type RemoveOptions struct {
Force bool
}
func newRemoveCommand(dockerCli command.Cli) *cobra.Command {
var opts RemoveOptions
cmd := &cobra.Command{
Use: "rm CONTEXT [CONTEXT...]",
Aliases: []string{"remove"},
Short: "Remove one or more contexts",
Args: cli.RequiresMinArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
return RunRemove(dockerCli, opts, args)
},
}
cmd.Flags().BoolVarP(&opts.Force, "force", "f", false, "Force the removal of a context in use")
return cmd
}
// RunRemove removes one or more contexts
func RunRemove(dockerCli command.Cli, opts RemoveOptions, names []string) error {
var errs []string
currentCtx := dockerCli.CurrentContext()
for _, name := range names {
if name == "default" {
errs = append(errs, `default: context "default" cannot be removed`)
} else if err := doRemove(dockerCli, name, name == currentCtx, opts.Force); err != nil {
errs = append(errs, err.Error())
} else {
fmt.Fprintln(dockerCli.Out(), name)
}
}
if len(errs) > 0 {
return errors.New(strings.Join(errs, "\n"))
}
return nil
}
func doRemove(dockerCli command.Cli, name string, isCurrent, force bool) error {
if isCurrent {
if !force {
return errors.Errorf("context %q is in use, set -f flag to force remove", name)
}
// fallback to DOCKER_HOST
cfg := dockerCli.ConfigFile()
cfg.CurrentContext = ""
if err := cfg.Save(); err != nil {
return err
}
}
if !force {
if err := checkContextExists(dockerCli, name); err != nil {
return err
}
}
return dockerCli.ContextStore().Remove(name)
}
// checkContextExists returns an error if the context directory does not exist.
func checkContextExists(dockerCli command.Cli, name string) error {
contextDir := dockerCli.ContextStore().GetStorageInfo(name).MetadataPath
_, err := os.Stat(contextDir)
if os.IsNotExist(err) {
return errdefs.NotFound(errors.Errorf("context %q does not exist", name))
}
// Ignore other errors; if relevant, they will produce an error when
// performing the actual delete.
return nil
}