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package images
import (
"os"
"reflect"
"strings"
buildahcli "github.com/containers/buildah/pkg/cli"
"github.com/containers/buildah/pkg/formats"
"github.com/containers/image/v5/types"
"github.com/containers/libpod/cmd/podman/registry"
"github.com/containers/libpod/pkg/domain/entities"
"github.com/containers/libpod/pkg/util/camelcase"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
// searchOptionsWrapper wraps entities.ImagePullOptions and prevents leaking
// CLI-only fields into the API types.
type searchOptionsWrapper struct {
entities.ImageSearchOptions
// CLI only flags
TLSVerifyCLI bool // Used to convert to an optional bool later
Format string // For go templating
}
var (
searchOptions = searchOptionsWrapper{}
searchDescription = `Search registries for a given image. Can search all the default registries or a specific registry.
Users can limit the number of results, and filter the output based on certain conditions.`
// Command: podman search
searchCmd = &cobra.Command{
Use: "search [flags] TERM",
Short: "Search registry for image",
Long: searchDescription,
RunE: imageSearch,
Args: cobra.ExactArgs(1),
Annotations: map[string]string{
registry.ParentNSRequired: "",
},
Example: `podman search --filter=is-official --limit 3 alpine
podman search registry.fedoraproject.org/ # only works with v2 registries
podman search --format "table {{.Index}} {{.Name}}" registry.fedoraproject.org/fedora`,
}
// Command: podman image search
imageSearchCmd = &cobra.Command{
Use: searchCmd.Use,
Short: searchCmd.Short,
Long: searchCmd.Long,
RunE: searchCmd.RunE,
Args: searchCmd.Args,
Annotations: searchCmd.Annotations,
Example: `podman image search --filter=is-official --limit 3 alpine
podman image search registry.fedoraproject.org/ # only works with v2 registries
podman image search --format "table {{.Index}} {{.Name}}" registry.fedoraproject.org/fedora`,
}
)
func init() {
// search
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: searchCmd,
})
flags := searchCmd.Flags()
searchFlags(flags)
// images search
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: imageSearchCmd,
Parent: imageCmd,
})
imageSearchFlags := imageSearchCmd.Flags()
searchFlags(imageSearchFlags)
}
// searchFlags set the flags for the pull command.
func searchFlags(flags *pflag.FlagSet) {
flags.StringSliceVarP(&searchOptions.Filters, "filter", "f", []string{}, "Filter output based on conditions provided (default [])")
flags.StringVar(&searchOptions.Format, "format", "", "Change the output format to a Go template")
flags.IntVar(&searchOptions.Limit, "limit", 0, "Limit the number of results")
flags.BoolVar(&searchOptions.NoTrunc, "no-trunc", false, "Do not truncate the output")
flags.StringVar(&searchOptions.Authfile, "authfile", buildahcli.GetDefaultAuthFile(), "Path of the authentication file. Use REGISTRY_AUTH_FILE environment variable to override")
flags.BoolVar(&searchOptions.TLSVerifyCLI, "tls-verify", true, "Require HTTPS and verify certificates when contacting registries")
if registry.IsRemote() {
_ = flags.MarkHidden("authfile")
_ = flags.MarkHidden("tls-verify")
}
}
// imageSearch implements the command for searching images.
func imageSearch(cmd *cobra.Command, args []string) error {
searchTerm := ""
switch len(args) {
case 1:
searchTerm = args[0]
default:
return errors.Errorf("search requires exactly one argument")
}
if searchOptions.Limit > 100 {
return errors.Errorf("Limit %d is outside the range of [1, 100]", searchOptions.Limit)
}
// TLS verification in c/image is controlled via a `types.OptionalBool`
// which allows for distinguishing among set-true, set-false, unspecified
// which is important to implement a sane way of dealing with defaults of
// boolean CLI flags.
if cmd.Flags().Changed("tls-verify") {
searchOptions.SkipTLSVerify = types.NewOptionalBool(!searchOptions.TLSVerifyCLI)
}
if searchOptions.Authfile != "" {
if _, err := os.Stat(searchOptions.Authfile); err != nil {
return errors.Wrapf(err, "error getting authfile %s", searchOptions.Authfile)
}
}
searchReport, err := registry.ImageEngine().Search(registry.GetContext(), searchTerm, searchOptions.ImageSearchOptions)
if err != nil {
return err
}
format := genSearchFormat(searchOptions.Format)
if len(searchReport) == 0 {
return nil
}
out := formats.StdoutTemplateArray{Output: searchToGeneric(searchReport), Template: format, Fields: searchHeaderMap()}
return out.Out()
}
// searchHeaderMap returns the headers of a SearchResult.
func searchHeaderMap() map[string]string {
s := new(entities.ImageSearchReport)
v := reflect.Indirect(reflect.ValueOf(s))
values := make(map[string]string, v.NumField())
for i := 0; i < v.NumField(); i++ {
key := v.Type().Field(i).Name
value := key
values[key] = strings.ToUpper(strings.Join(camelcase.Split(value), " "))
}
return values
}
func genSearchFormat(format string) string {
if format != "" {
// "\t" from the command line is not being recognized as a tab
// replacing the string "\t" to a tab character if the user passes in "\t"
return strings.Replace(format, `\t`, "\t", -1)
}
return "table {{.Index}}\t{{.Name}}\t{{.Description}}\t{{.Stars}}\t{{.Official}}\t{{.Automated}}\t"
}
func searchToGeneric(params []entities.ImageSearchReport) (genericParams []interface{}) {
for _, v := range params {
genericParams = append(genericParams, interface{}(v))
}
return genericParams
}
|
