Implement unique clipboard clearing behavior for interactive GUI/TUI implementations

core/copy.go

@@ -12,7 +12,7 @@ import (
 )
 
 // CopyArgument copies a field from an entry to the clipboard.
-func CopyArgument(executableName, targetLocation string, field int) {
+func CopyArgument(targetLocation string, field int) {
 	if isFile, _ := TargetIsFile(targetLocation, true, 2); isFile {
 
 		decryptedEntry := DecryptGPG(targetLocation)
@@ -42,9 +42,9 @@ func CopyArgument(executableName, targetLocation string, field int) {
 
 				fmt.Println("Clipboard will be kept up to date with the current TOTP code until this process is closed")
 
-				for { // keep field copied to clipboard, refresh on 30-second intervals
+				for { // keep token copied to clipboard, refresh on 30-second intervals
 					currentTime := time.Now()
-					copyField("", GenTOTP(secret, currentTime, forSteam))
+					copyString(true, GenTOTP(secret, currentTime, forSteam))
 					// sleep until next 30-second interval
 					time.Sleep(time.Duration(30-(currentTime.Second()%30)) * time.Second)
 				}
@@ -55,7 +55,7 @@ func CopyArgument(executableName, targetLocation string, field int) {
 		}
 
 		// copy field to clipboard, launch clipboard clearing process
-		copyField(executableName, copySubject)
+		copyString(false, copySubject)
 	}
 }
 

core/copyDARWIN.go

@@ -10,8 +10,8 @@ import (
 	"time"
 )
 
-// copyField copies a field from an entry to the clipboard.
+// copyString copies a string to the clipboard.
-func copyField(executableName, copySubject string) {
+func copyString(continuous bool, copySubject string) {
 	cmd := exec.Command("pbcopy")
 	writeToStdin(cmd, copySubject)
 	err := cmd.Run()
@@ -20,16 +20,8 @@ func copyField(executableName, copySubject string) {
 		os.Exit(ErrorClipboard)
 	}
 
-	// launch clipboard clearing process if executableName is provided
+	if !continuous {
-	if executableName != "" {
+		launchClipClear(copySubject)
-		cmd = exec.Command(executableName, "clipclear")
-		writeToStdin(cmd, copySubject)
-		err = cmd.Start()
-		if err != nil {
-			fmt.Println(AnsiError + "Failed to launch automated clipboard clearing process - Does this libmutton implementation support the \"clipclear\" argument?" + AnsiReset)
-			os.Exit(ErrorClipboard)
-		}
-		Exit(0) // only exit if clipboard clearing process is launched, otherwise assume continuous clipboard refresh
 	}
 }
 
@@ -53,5 +45,5 @@ func clipClear(oldContents string) {
 			os.Exit(ErrorClipboard)
 		}
 	}
-	os.Exit(0) // use os.Exit instead of core.Exit, as this function runs out of a background subprocess that is invisible to the user (will never appear in GUI/TUI environment)
+	Exit(0)
 }

core/copyTERMUX.go

@@ -10,8 +10,8 @@ import (
 	"time"
 )
 
-// copyField copies a field from an entry to the clipboard.
+// copyString copies a string to the clipboard.
-func copyField(executableName, copySubject string) {
+func copyString(continuous bool, copySubject string) {
 	cmd := exec.Command("termux-clipboard-set")
 	writeToStdin(cmd, copySubject)
 	err := cmd.Run()
@@ -20,16 +20,8 @@ func copyField(executableName, copySubject string) {
 		os.Exit(ErrorClipboard)
 	}
 
-	// launch clipboard clearing process if executableName is provided
+	if !continuous {
-	if executableName != "" {
+		launchClipClear(copySubject)
-		cmd = exec.Command(executableName, "clipclear")
-		writeToStdin(cmd, copySubject)
-		err = cmd.Start()
-		if err != nil {
-			fmt.Println(AnsiError + "Failed to launch automated clipboard clearing process - Does this libmutton implementation support the \"clipclear\" argument?" + AnsiReset)
-			os.Exit(ErrorClipboard)
-		}
-		Exit(0) // only exit if clipboard clearing process is launched, otherwise assume continuous clipboard refresh
 	}
 }
 
@@ -53,5 +45,5 @@ func clipClear(oldContents string) {
 			os.Exit(ErrorClipboard)
 		}
 	}
-	os.Exit(0) // use os.Exit instead of core.Exit, as this function runs out of a background subprocess that is invisible to the user (will never appear in GUI/TUI environment)
+	Exit(0)
 }

core/copyUNIXGeneric.go

@@ -10,8 +10,8 @@ import (
 	"time"
 )
 
-// copyField copies a field from an entry to the clipboard.
+// copyString copies a string to the clipboard.
-func copyField(executableName, copySubject string) {
+func copyString(continuous bool, copySubject string) {
 	var envSet bool // track whether environment variables are set
 	var cmd *exec.Cmd
 	// determine whether to use wl-copy (Wayland) or xclip (X11)
@@ -31,16 +31,8 @@ func copyField(executableName, copySubject string) {
 		os.Exit(ErrorClipboard)
 	}
 
-	// launch clipboard clearing process if executableName is provided
+	if !continuous {
-	if executableName != "" {
+		launchClipClear(copySubject)
-		cmd = exec.Command(executableName, "clipclear")
-		writeToStdin(cmd, copySubject)
-		err = cmd.Start()
-		if err != nil {
-			fmt.Println(AnsiError + "Failed to launch automated clipboard clearing process - Does this libmutton implementation support the \"clipclear\" argument?" + AnsiReset)
-			os.Exit(ErrorClipboard)
-		}
-		Exit(0) // only exit if clipboard clearing process is launched, otherwise assume continuous clipboard refresh
 	}
 }
 
@@ -77,5 +69,5 @@ func clipClear(oldContents string) {
 			os.Exit(ErrorClipboard)
 		}
 	}
-	os.Exit(0) // use os.Exit instead of core.Exit, as this function runs out of a background subprocess that is invisible to the user (will never appear in GUI/TUI environment)
+	Exit(0)
 }

core/copyWIN.go

@@ -10,8 +10,8 @@ import (
 	"time"
 )
 
-// copyField copies a field from an entry to the clipboard.
+// copyString copies a string to the clipboard.
-func copyField(executableName, copySubject string) {
+func copyString(continuous bool, copySubject string) {
 	cmd := exec.Command("powershell.exe", "-c", fmt.Sprintf("echo '%s' | Set-Clipboard", strings.ReplaceAll(copySubject, "'", "''")))
 	err := cmd.Run()
 	if err != nil {
@@ -19,16 +19,8 @@ func copyField(executableName, copySubject string) {
 		os.Exit(ErrorClipboard)
 	}
 
-	// launch clipboard clearing process if executableName is provided
+	if !continuous {
-	if executableName != "" {
+		launchClipClear(copySubject)
-		cmd = exec.Command(executableName, "clipclear")
-		writeToStdin(cmd, copySubject)
-		err = cmd.Start()
-		if err != nil {
-			fmt.Println(AnsiError + "Failed to launch automated clipboard clearing process - Does this libmutton implementation support the \"clipclear\" argument?" + AnsiReset)
-			os.Exit(ErrorClipboard)
-		}
-		Exit(0) // only exit if clipboard clearing process is launched, otherwise assume continuous clipboard refresh
 	}
 }
 
@@ -51,5 +43,5 @@ func clipClear(oldContents string) {
 			os.Exit(ErrorClipboard)
 		}
 	}
-	os.Exit(0) // use os.Exit instead of core.Exit, as this function runs out of a background subprocess that is invisible to the user (will never appear in GUI/TUI environment)
+	Exit(0)
 }

core/launchClipClearProcessCLI.go

@@ -0,0 +1,23 @@
+//go:build !returnOnExit
+
+package core
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+)
+
+// launchClipClear launches the automated clipboard clearing process.
+// For non-interactive CLI implementations, an entirely separate process is created for this purpose.
+func launchClipClear(copySubject string) {
+	executableName := os.Args[0]
+	cmd := exec.Command(executableName, "clipclear")
+	writeToStdin(cmd, copySubject)
+	err := cmd.Start()
+	if err != nil {
+		fmt.Println(AnsiError + "Failed to launch automated clipboard clearing process - Does this libmutton implementation support the \"clipclear\" argument?" + AnsiReset)
+		os.Exit(ErrorClipboard)
+	}
+	os.Exit(0) // use os.Exit directly since this version of this function is only meant for non-interactive CLI implementations
+}

core/launchClipClearProcessGUI.go

@@ -0,0 +1,9 @@
+//go:build returnOnExit
+
+package core
+
+// launchClipClear launches the automated clipboard clearing process.
+// For interactive GUI/TUI implementations, the clipboard clearing process is launched as a goroutine.
+func launchClipClear(copySubject string) {
+	go clipClear(copySubject)
+}