Include generic xattr syncmeta application

Author: adreed-msft

common/hash_data_other.go

@@ -1,5 +1,4 @@
-//go:build !windows
-// +build !windows
+//go:build !windows && !linux && !darwin && !freebsd && !netbsd && !solaris
 
 package common
 

common/hash_data_unix.go

@@ -0,0 +1,35 @@
+//go:build linux || darwin || freebsd || netbsd || solaris
+
+// additional *NIX based OSes included since it uses a generic xattr implementation.
+
+package common
+
+import (
+	"encoding/json"
+	"github.com/pkg/xattr"
+)
+
+var AzCopySyncMetaXAttr = "azcopy.syncmeta"
+
+func TryGetHashData(fullpath string) (SyncHashData, error) {
+	// LGet because we want to target the file we actually specify, not what's on the other end.
+	buf, err := xattr.LGet(fullpath, AzCopySyncMetaXAttr)
+	if err != nil {
+		return SyncHashData{}, err
+	}
+
+	var out SyncHashData
+	err = json.Unmarshal(buf, &out)
+
+	return out, err
+}
+
+func PutHashData(fullpath string, data SyncHashData) error {
+	buf, err := json.Marshal(data)
+	if err != nil {
+		return err
+	}
+
+	// LSet because we want to target the file we actually specify, not what's on the other end.
+	return xattr.LSet(fullpath, AzCopySyncMetaXAttr, buf)
+}

go.mod

@@ -14,15 +14,15 @@ require (
 	github.com/mattn/go-ieproxy v0.0.3
 	github.com/minio/minio-go v6.0.14+incompatible
 	github.com/pkg/errors v0.9.1
-	github.com/pkg/xattr v0.4.6
+	github.com/pkg/xattr v0.4.9
 	github.com/rogpeppe/go-internal v1.8.1 // indirect
 	github.com/spf13/cobra v1.4.0
 	github.com/wastore/keychain v0.0.0-20180920053336-f2c902a3d807
 	github.com/wastore/keyctl v0.3.1
 	golang.org/x/crypto v0.0.0-20220314234724-5d542ad81a58
 	golang.org/x/oauth2 v0.0.0-20220309155454-6242fa91716a
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5
+	golang.org/x/sys v0.0.0-20220408201424-a24fb2fb8a0f
 	google.golang.org/api v0.72.0
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c
 )

go.sum

@@ -240,6 +240,8 @@ github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/xattr v0.4.6 h1:0vqthLIMxQKA9VscyMcxjvAUGvyfzlk009vwLE8OZJg=
 github.com/pkg/xattr v0.4.6/go.mod h1:sBD3RAqlr8Q+RC3FutZcikpT8nyDrIEEBw2J744gVWs=
+github.com/pkg/xattr v0.4.9 h1:5883YPCtkSd8LFbs13nXplj9g9tlrwoJRjgpgMu1/fE=
+github.com/pkg/xattr v0.4.9/go.mod h1:di8WF84zAKk8jzR1UBTEWh9AUlIZZ7M/JNt8e9B6ktU=
 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/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
@@ -460,6 +462,8 @@ golang.org/x/sys v0.0.0-20220128215802-99c3d69c2c27/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220209214540-3681064d5158/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5 h1:y/woIyUBFbpQGKS0u1aHF/40WUDnek3fPOyD08H5Vng=
 golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220408201424-a24fb2fb8a0f h1:8w7RhxzTVgUzw/AH/9mUV5q0vMgy40SQRursCcfmkCw=
+golang.org/x/sys v0.0.0-20220408201424-a24fb2fb8a0f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=