add common GPL headers

Makefile

@@ -27,5 +27,8 @@ goimports:
 clean:
 	rm -f go.*
 
+gpl:
+	wit-test --witcom
+
 check-git-clean:
 	@git diff-index --quiet HEAD -- || (echo "Git repository is dirty, please commit your changes first"; exit 1)

argv.go

@@ -1,3 +1,6 @@
+// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
+// Use of this source code is governed by the GPL 3.0
+
 package main
 
 /*

argvAutocomplete.go

@@ -1,3 +1,6 @@
+// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
+// Use of this source code is governed by the GPL 3.0
+
 package main
 
 import (

doAptUpgrade.go

@@ -1,3 +1,6 @@
+// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
+// Use of this source code is governed by the GPL 3.0
+
 package main
 
 import (

doDebian.go

@@ -1,3 +1,6 @@
+// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
+// Use of this source code is governed by the GPL 3.0
+
 package main
 
 import (

doWITCOM.go

@@ -1,3 +1,7 @@
+// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
+// Use of this source code is governed by the GPL 3.0
+
+
 package main
 
 import (
@@ -24,6 +28,7 @@ func doWITCOM() {
 	}
 }
 
+// add a common header for WIT files
 // add a common header for WIT files
 
 func addCommonHeader(filename string) error {
@@ -34,13 +39,7 @@ func addCommonHeader(filename string) error {
 		return err
 	}
 
-	pf, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
-	defer pf.Close()
-	if err != nil {
-		log.Info("file open error. permissions?", filename, err)
-		return err
-	}
-
+	var newfile string
 	var start bool = true
 	var found bool
 	var done bool
@@ -52,10 +51,10 @@ func addCommonHeader(filename string) error {
 			start = false
 			if strings.Contains(line, "WIT.COM") {
 				found = true
-				continue
 			} else {
-				fmt.Fprintln(pf, line)
+				newfile += fmt.Sprintln(line)
 			}
+			continue
 		}
 
 		// dump every other comment
@@ -64,16 +63,28 @@ func addCommonHeader(filename string) error {
 		} else {
 			found = false
 		}
+
+		// print the header once
 		if !done {
-			fmt.Fprintln(pf, "// Copyright 2017-2025 WIT.COM Inc. All rights reserved.")
-			fmt.Fprintln(pf, "// Use of this source code is governed by the GPL 3.0")
-			fmt.Fprintln(pf, "")
-			fmt.Fprintln(pf, line)
+			newfile += fmt.Sprintln("// Copyright 2017-2025 WIT.COM Inc. All rights reserved.")
+			newfile += fmt.Sprintln("// Use of this source code is governed by the GPL 3.0")
+			newfile += fmt.Sprintln("")
 			done = true
 		}
-		fmt.Fprintln(pf, line)
+		newfile += fmt.Sprintln(line)
 	}
 
+	pf, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		log.Info("file open error. permissions?", filename, err)
+		return err
+	}
+
+	// trim trailing empty lines from the new file
+	newfile = strings.TrimSpace(newfile)
+	fmt.Fprintln(pf, newfile)
+	pf.Close()
+
 	return nil
 }
 

main.go

@@ -1,3 +1,6 @@
+// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
+// Use of this source code is governed by the GPL 3.0
+
 package main
 
 import (

repomap.go

@@ -1,3 +1,6 @@
+// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
+// Use of this source code is governed by the GPL 3.0
+
 package main
 
 import (

structs.go

@@ -1,3 +1,6 @@
+// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
+// Use of this source code is governed by the GPL 3.0
+
 package main
 
 import (

windowApply.go

@@ -1,3 +1,6 @@
+// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
+// Use of this source code is governed by the GPL 3.0
+
 package main
 
 import (