[bitbake-devel] [PATCH v2] bitbake: Colorize knotty interactive console output

[Seth Bollinger]

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.

Signed-off-by: Seth Bollinger <seth.boll at gmail.com>
---
 bitbake/lib/bb/msg.py       |   40 ++++++++++++++++++++++++++++++++++++++++
 bitbake/lib/bb/ui/knotty.py |    6 +++++-
 2 files changed, 45 insertions(+), 1 deletions(-)

diff --git a/bitbake/lib/bb/msg.py b/bitbake/lib/bb/msg.py
index 9b39325..68b2ad7 100644
--- a/bitbake/lib/bb/msg.py
+++ b/bitbake/lib/bb/msg.py
@@ -55,6 +55,25 @@ class BBLogFormatter(logging.Formatter):
         CRITICAL: 'ERROR',
     }

+    color_enabled = False
+    BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(30,38)
+
+    COLORS = {
+        DEBUG3  : CYAN,
+        DEBUG2  : CYAN,
+        DEBUG   : CYAN,
+        VERBOSE : WHITE,
+        NOTE    : WHITE,
+        PLAIN   : WHITE,
+        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 +86,8 @@ class BBLogFormatter(logging.Formatter):
         if record.levelno == self.PLAIN:
             msg = record.getMessage()
         else:
+            if self.color_enabled:
+                self.colorize(record)
             msg = logging.Formatter.format(self, record)

         if hasattr(record, 'bb_exc_info'):
@@ -75,6 +96,25 @@ 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.levelname = "".join([self.BLD % color,
record.levelname, self.RST])
+            record.msg = "".join([self.STD % color, record.msg, self.RST])
+
+    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
diff --git a/bitbake/lib/bb/ui/knotty.py b/bitbake/lib/bb/ui/knotty.py
index b99a121..d9aa973 100644
--- a/bitbake/lib/bb/ui/knotty.py
+++ b/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)
-- 
1.7.2.5
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