[bitbake-devel] [PATCH] Add color to bitbake interactive console log formatter

[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 colors.
---
 lib/bb/msg.py       |   40 ++++++++++++++++++++++++++++++++++++++++
 lib/bb/ui/knotty.py |    6 +++++-
 2 files changed, 45 insertions(+), 1 deletions(-)

diff --git a/lib/bb/msg.py b/lib/bb/msg.py
index 9b39325..51e335b 100644
--- a/lib/bb/msg.py
+++ b/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 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/lib/bb/ui/knotty.py b/lib/bb/ui/knotty.py
index 9f51823..a6f29a9 100644
--- a/lib/bb/ui/knotty.py
+++ b/lib/bb/ui/knotty.py
@@ -114,12 +114,16 @@ 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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