add filer replication to google cloud storage

weed/command/scaffold.go

@@ -179,7 +179,7 @@ ttlSec = 0
 
 [sink.s3]
 # experimental
-# See https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/sessions.html
+# read credentials doc at https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/sessions.html
 # default loads credentials from the shared credentials file (~/.aws/credentials). 
 enabled = false
 aws_access_key_id     = ""     # if empty, loads from the shared credentials file (~/.aws/credentials).
@@ -189,13 +189,11 @@ bucket = "your_bucket_name"    # an existing bucket
 directory = ""                 # destination directory (do not prefix or suffix with "/")
 
 [sink.google_cloud_storage]
-# experimental
-# see https://cloud.google.com/docs/authentication/getting-started
+# read credentials doc at https://cloud.google.com/docs/authentication/getting-started
 enabled = false
 google_application_credentials = "/path/to/x.json" # path to json credential file
-projectId = "your_project_id"
-bucket = "your_bucket_name"    # an existing bucket
-directory = "/"                 # destination directory
+bucket = "your_bucket_seaweedfs"    # an existing bucket
+directory = "/"                     # destination directory
 
 `
 )

weed/replication/sink/gcssink/gcs_sink.go

@@ -17,7 +17,6 @@ import (
 
 type GcsSink struct {
 	client      *storage.Client
-	projectId   string
 	bucket      string
 	dir         string
 	filerSource *source.FilerSource
@@ -38,7 +37,6 @@ func (g *GcsSink) GetSinkToDirectory() string {
 func (g *GcsSink) Initialize(configuration util.Configuration) error {
 	return g.initialize(
 		configuration.GetString("google_application_credentials"),
-		configuration.GetString("projectId"),
 		configuration.GetString("bucket"),
 		configuration.GetString("directory"),
 	)
@@ -48,8 +46,7 @@ func (g *GcsSink) SetSourceFiler(s *source.FilerSource) {
 	g.filerSource = s
 }
 
-func (g *GcsSink) initialize(google_application_credentials, projectId, bucketName, dir string) (error) {
-	g.projectId = projectId
+func (g *GcsSink) initialize(google_application_credentials, bucketName, dir string) (error) {
 	g.bucket = bucketName
 	g.dir = dir