tweak version strings again

irc/constants.go

@@ -5,20 +5,7 @@
 
 package irc
 
-import "fmt"
-
 const (
-	// SemVer is the semantic version of Oragono.
-	SemVer = "2.1.0-unreleased"
-)
-
-var (
-	// Commit is the current git commit.
-	Commit = ""
-
-	// Ver is the full version of Oragono, used in responses to clients.
-	Ver = fmt.Sprintf("oragono-%s", SemVer)
-
 	// maxLastArgLength is used to simply cap off the final argument when creating general messages where we need to select a limit.
 	// for instance, in MONITOR lists, RPL_ISUPPORT lists, etc.
 	maxLastArgLength = 400

irc/version.go

@@ -0,0 +1,28 @@
+// Copyright (c) 2020 Shivaram Lingamneni
+// Released under the MIT license
+
+package irc
+
+import "fmt"
+
+const (
+	// SemVer is the semantic version of Oragono.
+	SemVer = "2.1.0-unreleased"
+)
+
+var (
+	// Ver is the full version of Oragono, used in responses to clients.
+	Ver = fmt.Sprintf("oragono-%s", SemVer)
+	// Commit is the full git hash, if available
+	Commit string
+)
+
+// initialize version strings (these are set in package main via linker flags)
+func SetVersionString(version, commit string) {
+	Commit = commit
+	if version != "" {
+		Ver = fmt.Sprintf("oragono-%s", version)
+	} else if len(Commit) == 40 {
+		Ver = fmt.Sprintf("oragono-%s-%s", SemVer, Commit[:16])
+	}
+}