From c43abd765cf51c06bbcaa5479dc49aab1396989f Mon Sep 17 00:00:00 2001
From: Anthony Fok <foka@debian.org>
Date: Wed, 26 Feb 2020 17:17:12 -0700
Subject: [PATCH] Print dh-make-golang version at the start of make

Set to v0.3.3 release
---
 main.go            | 12 ++++++++----
 make.go            |  8 ++++++++
 version_current.go | 31 +++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+), 4 deletions(-)
 create mode 100644 version_current.go

diff --git a/main.go b/main.go
index 3c1e8a6..adb5a27 100644
--- a/main.go
+++ b/main.go
@@ -8,16 +8,20 @@ import (
 	"github.com/gregjones/httpcache"
 )
 
+const program = "dh-make-golang"
+
 var (
 	gitHub *github.Client
 )
 
 func usage() {
-	fmt.Fprintf(os.Stderr, "%s is a tool that converts Go packages into Debian package source.\n", os.Args[0])
+	fmt.Fprintf(os.Stderr, "%s\n", buildVersionString())
+	fmt.Fprintf(os.Stderr, "\n")
+	fmt.Fprintf(os.Stderr, "%s is a tool that converts Go packages into Debian package source.\n", program)
 	fmt.Fprintf(os.Stderr, "\n")
-	fmt.Fprintf(os.Stderr, "Usage:\n\t%s [globalflags] <command> [flags] <args>\n", os.Args[0])
+	fmt.Fprintf(os.Stderr, "Usage:\n\t%s [globalflags] <command> [flags] <args>\n", program)
 	fmt.Fprintf(os.Stderr, "\n")
-	fmt.Fprintf(os.Stderr, "%s commands:\n", os.Args[0])
+	fmt.Fprintf(os.Stderr, "%s commands:\n", program)
 	fmt.Fprintf(os.Stderr, "\tmake\t\t\tcreate a Debian package\n")
 	fmt.Fprintf(os.Stderr, "\tsearch\t\t\tsearch Debian for already-existing packages\n")
 	fmt.Fprintf(os.Stderr, "\testimate\t\testimate the amount of work for a package\n")
@@ -25,7 +29,7 @@ func usage() {
 	fmt.Fprintf(os.Stderr, "\n")
 	fmt.Fprintf(os.Stderr, "For backwards compatibility, when no command is specified,\nthe make command is executed.\n")
 	fmt.Fprintf(os.Stderr, "\n")
-	fmt.Fprintf(os.Stderr, "To learn more about a command, run \"%s <command> -help\",\ne.g. \"%s make -help\"\n", os.Args[0], os.Args[0])
+	fmt.Fprintf(os.Stderr, "To learn more about a command, run \"%s <command> -help\",\ne.g. \"%s make -help\"\n", program, program)
 	fmt.Fprintf(os.Stderr, "\n")
 }
 
diff --git a/make.go b/make.go
index 3e89cbb..56fb909 100644
--- a/make.go
+++ b/make.go
@@ -784,6 +784,14 @@ func execMake(args []string, usage func()) {
 			"Valid values are \"a\", \"at\" and \"ast\", see wrap-and-sort(1) man page\n"+
 			"for more information.")
 
+	// ====================================================================
+	//
+	// Start actual make routine
+	//
+	// ====================================================================
+
+	log.Printf("Starting %q", buildVersionString())
+
 	err := fs.Parse(args)
 	if err != nil {
 		log.Fatal(err)
diff --git a/version_current.go b/version_current.go
new file mode 100644
index 0000000..0cd0cd7
--- /dev/null
+++ b/version_current.go
@@ -0,0 +1,31 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// Version represents the dh-make-golang build version.
+type Version struct {
+	major      int
+	minor      int
+	patch      int
+	preRelease string
+}
+
+var currentVersion = Version{
+	major:      0,
+	minor:      3,
+	patch:      3,
+	preRelease: "",
+}
+
+func (v Version) String() string {
+	return fmt.Sprintf("%d.%d.%d%s", v.major, v.minor, v.patch, v.preRelease)
+}
+
+func buildVersionString() string {
+	version := "v" + currentVersion.String()
+	osArch := runtime.GOOS + "/" + runtime.GOARCH
+	return fmt.Sprintf("%s %s %s", program, version, osArch)
+}