cmd, internal/build, docker: advertise commit date in unstable build versions (#19522)

* add-date-to unstable

* fields-insteadof-split

* internal/build: support building with missing git

* docker: add git history back to support commit date in version

* internal/build: use PR commits hashes for PR builds

cmd/swarm/global-store/main.go

@@ -26,6 +26,7 @@ import (
 var (
 	version   = "0.1"
 	gitCommit string // Git SHA1 commit hash of the release (set via linker flags)
+	gitDate   string
 )
 
 func main() {
@@ -45,6 +46,9 @@ func newApp() (app *cli.App) {
 	if len(gitCommit) >= 8 {
 		app.Version += "-" + gitCommit[:8]
 	}
+	if gitDate != "" {
+		app.Version += "-" + gitDate
+	}
 	app.Usage = "Swarm Global Store"
 
 	// app flags (for all commands)

cmd/swarm/main.go

@@ -102,7 +102,7 @@ func init() {
 	utils.ListenPortFlag.Value = 30399
 }
 
-var app = utils.NewApp("", "Ethereum Swarm")
+var app = utils.NewApp("", "", "Ethereum Swarm")
 
 // This init function creates the cli.App.
 func init() {

cmd/swarm/swarm-snapshot/main.go

@@ -25,6 +25,7 @@ import (
 )
 
 var gitCommit string // Git SHA1 commit hash of the release (set via linker flags)
+var gitDate string
 
 // default value for "create" command --nodes flag
 const defaultNodes = 8
@@ -40,7 +41,7 @@ func main() {
 // newApp construct a new instance of Swarm Snapshot Utility.
 // Method Run is called on it in the main function and in tests.
 func newApp() (app *cli.App) {
-	app = utils.NewApp(gitCommit, "Swarm Snapshot Utility")
+	app = utils.NewApp(gitCommit, gitDate, "Swarm Snapshot Utility")
 
 	app.Name = "swarm-snapshot"
 	app.Usage = ""