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package main
import (
"fmt"
"github.com/containers/storage"
"github.com/containers/storage/pkg/mflag"
)
var hashMethodArg = "crc"
func dedupCmd(flags *mflag.FlagSet, action string, m storage.Store, args []string) (int, error) {
var hashMethod storage.DedupHashMethod
switch hashMethodArg {
case "crc":
hashMethod = storage.DedupHashCRC
case "size":
hashMethod = storage.DedupHashFileSize
case "sha256":
hashMethod = storage.DedupHashSHA256
default:
return 1, fmt.Errorf("invalid hash method: %s", hashMethodArg)
}
res, err := m.Dedup(storage.DedupArgs{
Options: storage.DedupOptions{
HashMethod: hashMethod,
},
})
if err != nil {
if jsonOutput {
_, err2 := outputJSON(err)
return 1, err2 // Note that err2 is usually nil
}
return 1, fmt.Errorf("%s: %+v", action, err)
}
if jsonOutput {
return outputJSON(res)
} else {
fmt.Printf("Deduplicated %v bytes\n", res.Deduped)
}
return 0, nil
}
func init() {
commands = append(commands, command{
names: []string{"dedup"},
usage: "Dedup all images",
minArgs: 0,
maxArgs: 0,
action: dedupCmd,
addFlags: func(flags *mflag.FlagSet, cmd *command) {
flags.BoolVar(&jsonOutput, []string{"-json", "j"}, jsonOutput, "Prefer JSON output")
flags.StringVar(&hashMethodArg, []string{"-hash-method"}, hashMethodArg, "Specify the hash function to use to detect identical files")
},
})
}
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