u_boot_pylib: Support a fatal level in tout

It is convenient to be able to print a message and exit. Add a new
'fatal' level to support this.

Update some assumptions about the level, so that the tools continue to
work as now.

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/binman/control.py

@@ -777,7 +777,7 @@ def Binman(args):
 
     if args.cmd in ['ls', 'extract', 'replace', 'tool', 'sign']:
         try:
-            tout.init(args.verbosity)
+            tout.init(args.verbosity + 1)
             if args.cmd == 'replace':
                 tools.prepare_output_dir(args.outdir, args.preserve)
             else:
@@ -835,9 +835,9 @@ def Binman(args):
         args.indir.append(board_pathname)
 
     try:
-        tout.init(args.verbosity)
+        tout.init(args.verbosity + 1)
         elf.debug = args.debug
-        cbfs_util.VERBOSE = args.verbosity > 2
+        cbfs_util.VERBOSE = args.verbosity > tout.NOTICE
         state.use_fake_dtb = args.fake_dtb
 
         # Normally we replace the 'u-boot' etype with 'u-boot-expanded', etc.

tools/u_boot_pylib/tout.py

@@ -9,7 +9,7 @@ import sys
 from u_boot_pylib import terminal
 
 # Output verbosity levels that we support
-ERROR, WARNING, NOTICE, INFO, DETAIL, DEBUG = range(6)
+FATAL, ERROR, WARNING, NOTICE, INFO, DETAIL, DEBUG = range(7)
 
 in_progress = False
 
@@ -42,12 +42,12 @@ def user_is_present():
     Returns:
         True if it thinks the user is there, and False otherwise
     """
-    return stdout_is_tty and verbose > 0
+    return stdout_is_tty and verbose > ERROR
 
 def clear_progress():
     """Clear any active progress message on the terminal."""
     global in_progress
-    if verbose > 0 and stdout_is_tty and in_progress:
+    if verbose > ERROR and stdout_is_tty and in_progress:
         _stdout.write('\r%s\r' % (" " * len (_progress)))
         _stdout.flush()
         in_progress = False
@@ -60,7 +60,7 @@ def progress(msg, warning=False, trailer='...'):
         warning: True if this is a warning."""
     global in_progress
     clear_progress()
-    if verbose > 0:
+    if verbose > ERROR:
         _progress = msg + trailer
         if stdout_is_tty:
             col = _color.YELLOW if warning else _color.GREEN
@@ -87,6 +87,8 @@ def _output(level, msg, color=None):
             print(msg, file=sys.stderr)
         else:
             print(msg)
+    if level == FATAL:
+        sys.exit(1)
 
 def do_output(level, msg):
     """Output a message to the terminal.
@@ -98,6 +100,14 @@ def do_output(level, msg):
     """
     _output(level, msg)
 
+def fatal(msg):
+    """Display an error message and exit
+
+    Args:
+        msg; Message to display.
+    """
+    _output(FATAL, msg, _color.RED)
+
 def error(msg):
     """Display an error message
 
@@ -153,13 +163,13 @@ def user_output(msg):
     Args:
         msg; Message to display.
     """
-    _output(0, msg)
+    _output(ERROR, msg)
 
 def init(_verbose=WARNING, stdout=sys.stdout, allow_colour=True):
     """Initialize a new output object.
 
     Args:
-        verbose: Verbosity level (0-4).
+        verbose: Verbosity level (0-6).
         stdout: File to use for stdout.
     """
     global verbose, _progress, _color, _stdout, stdout_is_tty