playing with the ui

Signed-off-by: Jeff Carr <jcarr@wit.com>

make-sdcard/main.go

@@ -4,6 +4,7 @@ import "log"
 import "fmt"
 import "strings"
 import "reflect"
+import "os"
 import "os/exec"
 import "bytes"
 
@@ -66,19 +67,26 @@ func format(mybut *ui.Button) {
 	// exampleCommand("ls", "/tmp")
 	// stdoutExec("ls /tmp", 50)
 	// ping("git.wit.com", 5)
-	// simpleScanner("ping git.wit.com")
-	// simpleScanner("dd if=/home/pinebook/factory/factory-pine14inch of=/dev/sdb status=progress bs=1M oflag=sync count=300");
-	// simpleScanner("dd if=/home/pinebook/factory/factory-pine14inch of=/dev/sdb status=progress bs=1M oflag=sync count=300");
-	simpleScanner("parted /dev/sdb mklabel msdos")
-	simpleScanner("parted /dev/sdb mkpart primary ext4 1MiB 8GB")
-	simpleScanner("parted /dev/sdb mkpart primary ext4 8GB 32GB")
-	simpleScanner("sleep 1")
-	simpleScanner("mkfs.ext4 /dev/sdb1")
-	simpleScanner("mkfs.ext4 /dev/sdb2")
-	simpleScanner("e2label /dev/sdb1 root")
-	simpleScanner("e2label /dev/sdb2 factory-image")
-	simpleScanner("mount /dev/sdb1 /mnt/sdcard/")
-	simpleScanner("dd if=u-boot-sunxi-with-spl.bin of=/dev/sdb bs=1K seek=8")
+	// simpleProcess("ping git.wit.com")
+	// simpleProcess("dd if=/home/pinebook/factory/factory-pine14inch of=/dev/sdb status=progress bs=1M oflag=sync count=300");
+	// simpleProcess("dd if=/home/pinebook/factory/factory-pine14inch of=/dev/sdb status=progress bs=1M oflag=sync count=300");
+
+	simpleProcess("pwd")
+	simpleProcess("ls -l")
+	os.Chdir("/mnt")
+	simpleProcess("pwd")
+	simpleProcess("ls -l")
+	return
+	simpleProcess("parted -s /dev/sdb mklabel msdos")
+	simpleProcess("parted -s /dev/sdb mkpart primary ext4 1MiB 8GB")
+	simpleProcess("parted -s /dev/sdb mkpart primary ext4 8GB 32GB")
+	simpleProcess("sleep 1")
+	simpleProcess("mkfs.ext4 /dev/sdb1")
+	simpleProcess("mkfs.ext4 /dev/sdb2")
+	simpleProcess("e2label /dev/sdb1 root")
+	simpleProcess("e2label /dev/sdb2 factory-image")
+	simpleProcess("mount /dev/sdb1 /mnt/sdcard/")
+	simpleProcess("dd if=../u-boot/u-boot-sunxi-with-spl.bin of=/dev/sdb bs=1K seek=8")
 }
 
 func hostnameButton(hostname string, something func(*ui.Button)) ui.Control {

make-sdcard/ping.go

@@ -7,6 +7,8 @@ import "io"
 import "os"
 import "os/exec"
 import "bufio"
+import "reflect"
+import "github.com/davecgh/go-spew/spew"
 
 /*
 func exampleCommand(a string, b ...string) {
@@ -62,7 +64,8 @@ func ping(hostname string, count int) {
 	cmd.Wait()
 }
 
-func simpleScanner(cmd string) {
+// Spawns a process and captures stdout and stderr
+func simpleProcess(cmd string) {
 	log.Println("START " + cmd)
 	// cmd := exec.Command("ls", "/tmp", "/ballon", "/")
 
@@ -72,7 +75,12 @@ func simpleScanner(cmd string) {
 	stderr, _ := process.StderrPipe()
 	process.Start()
 
-	fmt.Println("start ls /tmp")
+	pid := process.Process.Pid
+	fmt.Println("start ls /tmp pid =", pid)
+	log.Println(reflect.ValueOf(process.Process).Elem())
+	log.Println(reflect.TypeOf(process.Process))
+	spew.Dump(process)
+
 
 	merged := io.MultiReader(stderr, stdout)
 	scanner := bufio.NewScanner(merged)
@@ -84,6 +92,9 @@ func simpleScanner(cmd string) {
 		// fmt.Fprintln(os.Stderr, "reading standard input:", err)
 		fmt.Println("reading standard input:", err)
 	}
+
+	// One must wait for the process to formally finish and flush all buffer output
+	process.Wait()
 	log.Println("END   " + cmd)
 }