Move packages out of src/

backend/copyTERMUX.go

@@ -0,0 +1,57 @@
+//go:build linux && termux
+
+package backend
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+)
+
+// copyField copies a field from an entry to the clipboard
+func copyField(executableName, copySubject string) {
+	cmd := exec.Command("termux-clipboard-set")
+	writeToStdin(cmd, copySubject)
+	err := cmd.Run()
+	if err != nil {
+		fmt.Println(AnsiError + "Failed to copy to clipboard: " + err.Error() + AnsiReset)
+		os.Exit(1)
+	}
+
+	// launch clipboard clearing process if executableName is provided
+	if executableName != "" {
+		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(1)
+		}
+		Exit(0) // only exit if clipboard clearing process is launched, otherwise assume continuous clipboard refresh
+	}
+}
+
+// clipClear is called in a separate process to clear the clipboard after 30 seconds
+func clipClear(oldContents string) {
+	time.Sleep(30 * time.Second)
+
+	cmd := exec.Command("termux-clipboard-get")
+	newContents, err := cmd.Output()
+	if err != nil {
+		fmt.Println(AnsiError + "Failed to read clipboard contents: " + err.Error() + AnsiReset)
+		os.Exit(1)
+	}
+
+	if oldContents == strings.TrimRight(string(newContents), "\r\n") {
+		cmd = exec.Command("termux-clipboard-set")
+		writeToStdin(cmd, "")
+		err = cmd.Run()
+		if err != nil {
+			fmt.Println(AnsiError + "Failed to clear clipboard: " + err.Error() + AnsiReset)
+			os.Exit(1)
+		}
+	}
+	os.Exit(0) // use os.Exit instead of backend.Exit, as this function runs out of a background subprocess that is invisible to the user (will never appear in GUI/TUI environment)
+}