moved all compression to separate package and sanitized identifiers

cli/command_benchmark_compression.go

@@ -7,7 +7,7 @@ import (
 	"time"
 
 	"github.com/kopia/kopia/internal/units"
-	"github.com/kopia/kopia/repo/object"
+	"github.com/kopia/kopia/repo/compression"
 
 	kingpin "gopkg.in/alecthomas/kingpin.v2"
 )
@@ -23,7 +23,7 @@ var (
 
 func runBenchmarkCompressionAction(ctx *kingpin.ParseContext) error {
 	type benchResult struct {
-		compression    object.CompressorName
+		compression    compression.Name
 		throughput     float64
 		compressedSize int64
 	}
@@ -41,7 +41,7 @@ func runBenchmarkCompressionAction(ctx *kingpin.ParseContext) error {
 		data = d
 	}
 
-	for name, comp := range object.CompressorsByName {
+	for name, comp := range compression.ByName {
 		log.Infof("Benchmarking compressor '%v' (%v x %v bytes)", name, *benchmarkCompressionRepeat, len(data))
 
 		t0 := time.Now()

cli/command_policy_set.go

@@ -9,7 +9,7 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/kopia/kopia/repo"
-	"github.com/kopia/kopia/repo/object"
+	"github.com/kopia/kopia/repo/compression"
 	"github.com/kopia/kopia/snapshot/policy"
 )
 
@@ -234,7 +234,7 @@ func setCompressionPolicyFromFlags(p *policy.CompressionPolicy, changeCount *int
 		} else {
 			printStderr(" - setting compression algorithm to %v\n", v)
 
-			p.CompressorName = object.CompressorName(v)
+			p.CompressorName = compression.Name(v)
 		}
 	}
 
@@ -349,7 +349,7 @@ func applyPolicyNumber64(desc string, val *int64, str string, changeCount *int)
 
 func supportedCompressionAlgorithms() []string {
 	var res []string
-	for name := range object.CompressorsByName {
+	for name := range compression.ByName {
 		res = append(res, string(name))
 	}