bitbake: knotty: Colorize knotty interactive console output

Add bold color output to log level name and standard color output to log msg
when bitbake is run from an iteractive console.  Color output is only
enabled
if the terminal supports color.

Used Jason Wessel's recommendation for transparency on verbose, note and
plain.

(Bitbake rev: 2734240da2cc150f811129a6adf6eb4b2161b204)

Signed-off-by: Seth Bollinger <seth.boll@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/msg.py

@@ -23,6 +23,7 @@ Message handling infrastructure for bitbake
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 import sys
+import copy
 import logging
 import collections
 from itertools import groupby
@@ -55,6 +56,25 @@ class BBLogFormatter(logging.Formatter):
         CRITICAL: 'ERROR',
     }
 
+    color_enabled = False
+    BASECOLOR, BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(29,38)
+
+    COLORS = {
+        DEBUG3  : CYAN,
+        DEBUG2  : CYAN,
+        DEBUG   : CYAN,
+        VERBOSE : BASECOLOR,
+        NOTE    : BASECOLOR,
+        PLAIN   : BASECOLOR,
+        WARNING : YELLOW,
+        ERROR   : RED,
+        CRITICAL: RED,
+    }
+
+    BLD = '\033[1;%dm'
+    STD = '\033[%dm'
+    RST = '\033[0m'
+
     def getLevelName(self, levelno):
         try:
             return self.levelnames[levelno]
@@ -67,6 +87,8 @@ class BBLogFormatter(logging.Formatter):
         if record.levelno == self.PLAIN:
             msg = record.getMessage()
         else:
+            if self.color_enabled:
+                record = self.colorize(record)
             msg = logging.Formatter.format(self, record)
 
         if hasattr(record, 'bb_exc_info'):
@@ -75,6 +97,27 @@ class BBLogFormatter(logging.Formatter):
             msg += '\n' + ''.join(formatted)
         return msg
 
+    def colorize(self, record):
+        color = self.COLORS[record.levelno]
+        if self.color_enabled and color is not None:
+            record = copy.copy(record)
+            record.levelname = "".join([self.BLD % color, record.levelname, self.RST])
+            record.msg = "".join([self.STD % color, record.msg, self.RST])
+        return record
+
+    def enable_color(self):
+        import curses
+        try:
+            win = None
+            win = curses.initscr()
+            if curses.has_colors():
+                self.color_enabled = True
+        except:
+            pass
+        finally:
+            if win is not None:
+                curses.endwin()
+
 class BBLogFilter(object):
     def __init__(self, handler, level, debug_domains):
         self.stdlevel = level

bitbake/lib/bb/ui/knotty.py

@@ -238,12 +238,16 @@ def main(server, eventHandler, tf = TerminalFilter):
     helper = uihelper.BBUIHelper()
 
     console = logging.StreamHandler(sys.stdout)
-    format = bb.msg.BBLogFormatter("%(levelname)s: %(message)s")
+    format_str = "%(levelname)s: %(message)s"
+    format = bb.msg.BBLogFormatter(format_str)
+    if interactive:
+        format.enable_color()
     bb.msg.addDefaultlogFilter(console)
     console.setFormatter(format)
     logger.addHandler(console)
     if consolelogfile:
         bb.utils.mkdirhier(os.path.dirname(consolelogfile))
+        format = bb.msg.BBLogFormatter(format_str)
         consolelog = logging.FileHandler(consolelogfile)
         bb.msg.addDefaultlogFilter(consolelog)
         consolelog.setFormatter(format)