make ExecSystem() verbosity togglable

main.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os/exec"
 	"bufio"
+	"flag"
 )
 
 var mongoBasePath = "/opt/my-mongo"
@@ -13,36 +14,62 @@ var numberOfContainers int = 5
 var maxMemAllocPercent int = 95
 var mongoInitdbRootUsername = "sasha"
 var mongoInitdbRootPassword = "12345"
+var verbosePtr = flag.Bool("v", false, "boolean")
 
 func ExecSystem(command string) {
-	cmd := exec.Command("/usr/bin/bash", "-c", command)
-	stdout, err := cmd.StdoutPipe()
-    if err != nil {
-        fmt.Println("Error obtaining stdout pipe:", err)
-        return
-    }
 
-    // Start the command
-    if err := cmd.Start(); err != nil {
-        fmt.Println("Error starting command:", err)
-        return
-    }
+	if *verbosePtr{
+		cmd := exec.Command("/usr/bin/bash", "-c", command)
 		
-    // Read the output line by line
-    scanner := bufio.NewScanner(stdout)
-    for scanner.Scan() {
-        fmt.Println(scanner.Text())
-    }
+		stdout, err := cmd.StdoutPipe()
+		if err != nil {
+			fmt.Println("Error obtaining stdout pipe:", err)
+			return
+		}
 
-    // Check for any errors
-    if err := scanner.Err(); err != nil {
-        fmt.Println("Error reading command output:", err)
-    }
+		stderr, err := cmd.StderrPipe()
+		if err != nil {
+			fmt.Println("Error obtaining stderr pipe:", err)
+			return
+		}
 
-    // Wait for the command to finish
-    if err := cmd.Wait(); err != nil {
-        fmt.Println("Error waiting for command:", err)
-    }
+
+		// Start the command
+		if err := cmd.Start(); err != nil {
+			fmt.Println("Error starting command:", err)
+			return
+		}
+
+		// Read the output line by line
+		stdoutScanner := bufio.NewScanner(stdout)
+		stderrScanner := bufio.NewScanner(stderr)
+		for stdoutScanner.Scan() {
+			fmt.Println(stdoutScanner.Text())
+		}
+		for stderrScanner.Scan() {
+			fmt.Println(stderrScanner.Text())
+		}
+	} else {
+		cmd := exec.Command("/usr/bin/bash", "-c", command)
+		stderr, err := cmd.StderrPipe()
+		if err != nil {
+			fmt.Println("Error obtaining stderr pipe:", err)
+			return
+		}
+
+		// Start the command
+		if err := cmd.Start(); err != nil {
+			fmt.Println("Error starting command:", err)
+			return
+		}
+
+		// Read the output line by line
+		stderrScanner := bufio.NewScanner(stderr)
+
+		for stderrScanner.Scan() {
+			fmt.Println(stderrScanner.Text())
+		}
+	}
 }
 
 func genKeys() {
@@ -55,6 +82,7 @@ func genKeys() {
 }
 
 func main() {
+	flag.Parse()
 	checkRoot()
 	checkSettings()
 	instDeps()