greeter: migrated dms-greeter to github/AvengeMedia/dank-greeter

core/internal/utils/greeter_setup.go

@@ -0,0 +1,40 @@
+package utils
+
+import (
+	"bufio"
+	"fmt"
+	"os/exec"
+	"strings"
+)
+
+// RunDmsGreeterInstall delegates greeter setup to the standalone dms-greeter
+// binary, which owns greetd configuration since the greeter moved out of DMS.
+func RunDmsGreeterInstall(sudoPassword string, logFunc func(string)) error {
+	binary, err := exec.LookPath("dms-greeter")
+	if err != nil {
+		return fmt.Errorf("dms-greeter binary not found; install the dms-greeter package and run 'dms-greeter install'")
+	}
+
+	var cmd *exec.Cmd
+	if sudoPassword == "" {
+		cmd = exec.Command(binary, "install", "--yes")
+	} else {
+		cmd = exec.Command("sudo", "-S", "-p", "", binary, "install", "--yes")
+		cmd.Stdin = strings.NewReader(sudoPassword + "\n")
+	}
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+	cmd.Stderr = cmd.Stdout
+
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+	scanner := bufio.NewScanner(stdout)
+	for scanner.Scan() {
+		logFunc(scanner.Text())
+	}
+	return cmd.Wait()
+}