move SFTPGo package to the internal folder

SFTPGo is a daemon and command line tool, not a library.

The public API are provided by the SDK

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

internal/version/version.go

@@ -0,0 +1,70 @@
+// Copyright (C) 2019-2022  Nicola Murino
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package version
+
+import "strings"
+
+const version = "2.3.1-dev"
+
+var (
+	commit = ""
+	date   = ""
+	info   Info
+)
+
+// Info defines version details
+type Info struct {
+	Version    string   `json:"version"`
+	BuildDate  string   `json:"build_date"`
+	CommitHash string   `json:"commit_hash"`
+	Features   []string `json:"features"`
+}
+
+// GetAsString returns the string representation of the version
+func GetAsString() string {
+	var sb strings.Builder
+	sb.WriteString(info.Version)
+	if info.CommitHash != "" {
+		sb.WriteString("-")
+		sb.WriteString(info.CommitHash)
+	}
+	if info.BuildDate != "" {
+		sb.WriteString("-")
+		sb.WriteString(info.BuildDate)
+	}
+	if len(info.Features) > 0 {
+		sb.WriteString(" ")
+		sb.WriteString(strings.Join(info.Features, " "))
+	}
+	return sb.String()
+}
+
+func init() {
+	info = Info{
+		Version:    version,
+		CommitHash: commit,
+		BuildDate:  date,
+	}
+}
+
+// AddFeature adds a feature description
+func AddFeature(feature string) {
+	info.Features = append(info.Features, feature)
+}
+
+// Get returns the Info struct
+func Get() Info {
+	return info
+}