Show progress on TTY terminals

Author: screamerbg

mbed/mbed.py

@@ -178,14 +178,16 @@ def progress():
     sys.stdout.write('\b')
 
 def show_progress(title, percent, max_width=80):
-    percent = round(float(percent), 2)
-    show_percent = '%.2f' % percent
-    bwidth = max_width - len(str(title)) - len(show_percent) - 6 # 6 equals the spaces and paddings between title, progress bar and percentage
-    sys.stdout.write('%s |%s%s| %s%%\r' % (str(title), '#' * int(percent * bwidth // 100), '-' * (bwidth - int(percent * bwidth // 100)), show_percent))
-    sys.stdout.flush()
+    if sys.stdout.isatty():
+        percent = round(float(percent), 2)
+        show_percent = '%.2f' % percent
+        bwidth = max_width - len(str(title)) - len(show_percent) - 6 # 6 equals the spaces and paddings between title, progress bar and percentage
+        sys.stdout.write('%s |%s%s| %s%%\r' % (str(title), '#' * int(percent * bwidth // 100), '-' * (bwidth - int(percent * bwidth // 100)), show_percent))
+        sys.stdout.flush()
 
 def hide_progress(max_width=80):
-    sys.stdout.write("\r%s\r" % (' ' * max_width))
+    if sys.stdout.isatty():
+        sys.stdout.write("\r%s\r" % (' ' * max_width))
 
 # Process execution
 class ProcessException(Exception):