Version imprint (#1383)

* Versions

* Update build.sh

2 files changed, 28 insertions, 0 deletions

diff --git a/internal/setup/base.go b/internal/setup/base.go
index 7bf06e74..ec2bbc4c 100644
--- a/internal/setup/base.go
+++ b/internal/setup/base.go
@@ -100,6 +100,8 @@ func NewBaseDendrite(cfg *config.Dendrite, componentName string, useHTTPAPIs boo
 	internal.SetupHookLogging(cfg.Logging, componentName)
 	internal.SetupPprof()
 
+	logrus.Infof("Dendrite version %s", internal.VersionString())
+
 	closer, err := cfg.SetupTracing("Dendrite" + componentName)
 	if err != nil {
 		logrus.WithError(err).Panicf("failed to start opentracing")
diff --git a/internal/version.go b/internal/version.go
new file mode 100644
index 00000000..851a0938
--- /dev/null
+++ b/internal/version.go
@@ -0,0 +1,26 @@
+package internal
+
+import "fmt"
+
+// -ldflags "-X github.com/matrix-org/dendrite/internal.branch=master"
+var branch string
+
+// -ldflags "-X github.com/matrix-org/dendrite/internal.build=alpha"
+var build string
+
+const (
+	VersionMajor = 0
+	VersionMinor = 0
+	VersionPatch = 0
+)
+
+func VersionString() string {
+	version := fmt.Sprintf("%d.%d.%d", VersionMajor, VersionMinor, VersionPatch)
+	if branch != "" {
+		version += fmt.Sprintf("-%s", branch)
+	}
+	if build != "" {
+		version += fmt.Sprintf("+%s", build)
+	}
+	return version
+}