make the sdk a separate module

Fixes #657

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/alexedwards/argon2id v0.0.0-20211130144151-3585854a6387
 	github.com/aws/aws-sdk-go v1.42.26
 	github.com/cockroachdb/cockroach-go/v2 v2.2.5
+	github.com/drakkan/sftpgo/v2/sdk v0.0.0-20220104150741-2912b2e92e4b
 	github.com/eikenb/pipeat v0.0.0-20210603033007-44fc3ffce52b
 	github.com/fclairamb/ftpserverlib v0.17.0
 	github.com/fclairamb/go-log v0.2.0
@@ -21,7 +22,6 @@ require (
 	github.com/google/uuid v1.3.0
 	github.com/grandcat/zeroconf v1.0.0
 	github.com/hashicorp/go-hclog v1.0.0
-	github.com/hashicorp/go-plugin v1.4.3
 	github.com/hashicorp/go-retryablehttp v0.7.0
 	github.com/jlaffaye/ftp v0.0.0-20201112195030-9aae4d151126
 	github.com/klauspost/compress v1.13.6
@@ -50,14 +50,11 @@ require (
 	github.com/yl2chen/cidranger v1.0.3-0.20210928021809-d1cb2c52f37a
 	go.etcd.io/bbolt v1.3.6
 	go.uber.org/automaxprocs v1.4.0
-	gocloud.dev v0.24.0
 	golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3
-	golang.org/x/net v0.0.0-20211209124913-491a49abca63
+	golang.org/x/net v0.0.0-20211216030914-fe4d6282115f
 	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e
 	golang.org/x/time v0.0.0-20211116232009-f0f3c7e86c11
 	google.golang.org/api v0.63.0
-	google.golang.org/grpc v1.43.0
-	google.golang.org/protobuf v1.27.1
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 )
 
@@ -86,6 +83,7 @@ require (
 	github.com/google/go-cmp v0.5.6 // indirect
 	github.com/googleapis/gax-go/v2 v2.1.1 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
+	github.com/hashicorp/go-plugin v1.4.3 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/hashicorp/yamux v0.0.0-20211028200310-0bc27b27de87 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
@@ -125,19 +123,23 @@ require (
 	github.com/tklauser/numcpus v0.3.0 // indirect
 	github.com/yusufpapurcu/wmi v1.2.2 // indirect
 	go.opencensus.io v0.23.0 // indirect
+	gocloud.dev v0.24.0 // indirect
 	golang.org/x/mod v0.5.1 // indirect
 	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 // indirect
 	golang.org/x/text v0.3.7 // indirect
 	golang.org/x/tools v0.1.8 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/genproto v0.0.0-20211223182754-3ac035c7e7cb // indirect
+	google.golang.org/grpc v1.43.0 // indirect
+	google.golang.org/protobuf v1.27.1 // indirect
 	gopkg.in/ini.v1 v1.66.2 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )
 
 replace (
+	github.com/drakkan/sftpgo/v2/sdk => ./sdk
 	github.com/eikenb/pipeat => github.com/drakkan/pipeat v0.0.0-20210805162858-70e57fa8a639
 	github.com/jlaffaye/ftp => github.com/drakkan/ftp v0.0.0-20201114075148-9b9adce499a9
 	golang.org/x/crypto => github.com/drakkan/crypto v0.0.0-20211216170250-0a05a5747f0f

sdk/go.mod

@@ -0,0 +1,38 @@
+module github.com/drakkan/sftpgo/v2/sdk
+
+go 1.17
+
+require (
+	github.com/hashicorp/go-hclog v1.0.0
+	github.com/hashicorp/go-plugin v1.4.3
+	github.com/shirou/gopsutil/v3 v3.21.11
+	gocloud.dev v0.24.0
+	golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3
+	google.golang.org/grpc v1.43.0
+	google.golang.org/protobuf v1.27.1
+)
+
+require (
+	github.com/fatih/color v1.13.0 // indirect
+	github.com/go-ole/go-ole v1.2.6 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/googleapis/gax-go/v2 v2.1.1 // indirect
+	github.com/hashicorp/yamux v0.0.0-20211028200310-0bc27b27de87 // indirect
+	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
+	github.com/mattn/go-colorable v0.1.12 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/mitchellh/go-testing-interface v1.14.1 // indirect
+	github.com/oklog/run v1.1.0 // indirect
+	github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
+	github.com/tklauser/go-sysconf v0.3.9 // indirect
+	github.com/tklauser/numcpus v0.3.0 // indirect
+	github.com/yusufpapurcu/wmi v1.2.2 // indirect
+	go.opencensus.io v0.23.0 // indirect
+	golang.org/x/net v0.0.0-20211216030914-fe4d6282115f // indirect
+	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect
+	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/api v0.63.0 // indirect
+	google.golang.org/genproto v0.0.0-20211223182754-3ac035c7e7cb // indirect
+)