version: only git commit and build date must be modifiable

Improved some test cases too

README.md

@@ -45,10 +45,17 @@ Version info can be embedded populating the following variables at build time:
 - `github.com/drakkan/sftpgo/utils.commit`
 - `github.com/drakkan/sftpgo/utils.date`
 
-For example on Linux you can build using the following ldflags:
+For example you can build using the following command:
 
 ```bash
--ldflags "-s -w -X github.com/drakkan/sftpgo/utils.commit=`git describe --tags --always --dirty` -X github.com/drakkan/sftpgo/utils.date=`date --utc +%FT%TZ`"
+go build -i -ldflags "-s -w -X github.com/drakkan/sftpgo/utils.commit=`git describe --tags --always --dirty` -X github.com/drakkan/sftpgo/utils.date=`date --utc +%FT%TZ`" -o sftpgo
+```
+
+and you will get a version that includes git commit and build date like this one:
+
+```bash
+./sftpgo -v
+SFTPGo version: 0.9.0-dev-90607d4-dirty-2019-08-08T19:28:36Z
 ```
 
 A systemd sample [service](https://github.com/drakkan/sftpgo/tree/master/init/sftpgo.service "systemd service") can be found inside the source tree.

api/internal_test.go

@@ -1,11 +1,14 @@
 package api
 
 import (
+	"context"
 	"fmt"
 	"net/http"
+	"net/http/httptest"
 	"testing"
 
 	"github.com/drakkan/sftpgo/dataprovider"
+	"github.com/go-chi/chi"
 )
 
 const (
@@ -211,3 +214,15 @@ func TestApiCallToNotListeningServer(t *testing.T) {
 	}
 	SetBaseURL(oldBaseURL)
 }
+
+func TestCloseSFTPConnectionHandler(t *testing.T) {
+	req, _ := http.NewRequest(http.MethodDelete, activeConnectionsPath+"/connectionID", nil)
+	rctx := chi.NewRouteContext()
+	rctx.URLParams.Add("connectionID", "")
+	req = req.WithContext(context.WithValue(req.Context(), chi.RouteCtxKey, rctx))
+	rr := httptest.NewRecorder()
+	handleCloseSFTPConnection(rr, req)
+	if rr.Code != http.StatusBadRequest {
+		t.Errorf("Expected response code 400. Got %d", rr.Code)
+	}
+}

api/router.go

@@ -40,16 +40,7 @@ func initializeRouter() {
 	})
 
 	router.Delete(activeConnectionsPath+"/{connectionID}", func(w http.ResponseWriter, r *http.Request) {
-		connectionID := chi.URLParam(r, "connectionID")
-		if connectionID == "" {
-			sendAPIResponse(w, r, nil, "connectionID is mandatory", http.StatusBadRequest)
-			return
-		}
-		if sftpd.CloseActiveConnection(connectionID) {
-			sendAPIResponse(w, r, nil, "Connection closed", http.StatusOK)
-		} else {
-			sendAPIResponse(w, r, nil, "Not Found", http.StatusNotFound)
-		}
+		handleCloseSFTPConnection(w, r)
 	})
 
 	router.Get(quotaScanPath, func(w http.ResponseWriter, r *http.Request) {
@@ -80,3 +71,16 @@ func initializeRouter() {
 		deleteUser(w, r)
 	})
 }
+
+func handleCloseSFTPConnection(w http.ResponseWriter, r *http.Request) {
+	connectionID := chi.URLParam(r, "connectionID")
+	if connectionID == "" {
+		sendAPIResponse(w, r, nil, "connectionID is mandatory", http.StatusBadRequest)
+		return
+	}
+	if sftpd.CloseActiveConnection(connectionID) {
+		sendAPIResponse(w, r, nil, "Connection closed", http.StatusOK)
+	} else {
+		sendAPIResponse(w, r, nil, "Not Found", http.StatusNotFound)
+	}
+}

sftpd/sftpd_test.go

@@ -310,6 +310,10 @@ func TestSymlink(t *testing.T) {
 		if err != nil {
 			t.Errorf("error creating symlink: %v", err)
 		}
+		err = client.Symlink(testFileName, testFileName+".link")
+		if err == nil {
+			t.Errorf("creating a symlink to an existing one must fail")
+		}
 		err = client.Remove(testFileName + ".link")
 		if err != nil {
 			t.Errorf("error removing symlink: %v", err)

utils/version.go

@@ -1,7 +1,8 @@
 package utils
 
+const version = "0.9.0-dev"
+
 var (
-	version     = "0.9.0-dev"
 	commit      = ""
 	date        = ""
 	versionInfo VersionInfo