feat: file relative apis (#286)

Co-authored-by: anrs <anders.hu@shopee.com>

Author: anrs

engine/virt/virt.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"path/filepath"
 	"strings"
 
 	log "github.com/sirupsen/logrus"
@@ -275,9 +276,13 @@ func (v *Virt) VirtualizationUpdateResource(ctx context.Context, ID string, opts
 	return err
 }
 
-// VirtualizationCopyFrom copies from another.
+// VirtualizationCopyFrom copies file content from the container.
 func (v *Virt) VirtualizationCopyFrom(ctx context.Context, ID, path string) (io.ReadCloser, string, error) {
-	return nil, "", fmt.Errorf("VirtualizationCopyFrom does not implement")
+	rd, err := v.client.Cat(ctx, ID, path)
+	if err != nil {
+		return nil, "", err
+	}
+	return ioutil.NopCloser(rd), filepath.Base(path), nil
 }
 
 // VirtualizationExecute executes commands in running virtual unit

go.mod

@@ -28,7 +28,7 @@ require (
 	github.com/opencontainers/runc v0.1.1 // indirect
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/pkg/errors v0.9.1
-	github.com/projecteru2/libyavirt v0.0.0-20200831030711-2bb3f2ba0cb7
+	github.com/projecteru2/libyavirt v0.0.0-20201127073250-63c729c0fe01
 	github.com/prometheus/client_golang v1.7.1
 	github.com/sanity-io/litter v1.3.0
 	github.com/sethvargo/go-signalcontext v0.1.0

go.sum

@@ -220,8 +220,8 @@ github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
 github.com/pmezard/go-difflib v0.0.0-20151028094244-d8ed2627bdf0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/projecteru2/libyavirt v0.0.0-20200831030711-2bb3f2ba0cb7 h1:h7p+s1YB6Q3Bsk0+e4bJYjtVLIC5vz/+0ZmxrsDXod0=
-github.com/projecteru2/libyavirt v0.0.0-20200831030711-2bb3f2ba0cb7/go.mod h1:9/SNmdphwl12ubwihkRa9YtOozM6liYLDxsricra1mY=
+github.com/projecteru2/libyavirt v0.0.0-20201127073250-63c729c0fe01 h1:jwdXaoOwm2yG3GdFREt1qMWL9RrumHvcqQpgYieNM3s=
+github.com/projecteru2/libyavirt v0.0.0-20201127073250-63c729c0fe01/go.mod h1:9/SNmdphwl12ubwihkRa9YtOozM6liYLDxsricra1mY=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 github.com/prometheus/client_golang v1.1.0/go.mod h1:I1FGZT9+L76gKKOs5djB6ezCbFQP1xR9D75/vuwEF3g=