From 7e79bcd4ab0030db5c5a7998c81f63c48656be80 Mon Sep 17 00:00:00 2001
From: Guido Günther <agx@sigxcpu.org>
Date: Fri, 3 Sep 2010 13:07:10 +0200
Subject: Add logging functions

This allows us to color and prefix the output.

Closes: #544332
---
 gbp/log.py | 110 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 gbp/log.py

(limited to 'gbp/log.py')

diff --git a/gbp/log.py b/gbp/log.py
new file mode 100644
index 0000000..bf8a3e3
--- /dev/null
+++ b/gbp/log.py
@@ -0,0 +1,110 @@
+# vim: set fileencoding=utf-8 :
+#
+# (C) 2010 Guido Guenther <agx@sigxcpu.org>
+#    This program is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation; either version 2 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program; if not, write to the Free Software
+#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+"""Simple colored logging classes"""
+
+import sys
+
+logger = None
+
+class Logger(object):
+
+    DEBUG, INFO, WARNING, ERROR = range(4)
+
+    COLOR_NONE = 0
+    COLOR_BLACK, COLOR_RED, COLOR_GREEN = range(30,33)
+
+    COLOR_SEQ = "\033[%dm"
+    BOLD_SEQ = "\033[1m"
+
+
+    format = ("%(color)s"
+              "gbp:%(levelname)s: "
+              "%(message)s"
+              "%(coloroff)s")
+
+    def __init__(self):
+        self.levels = { self.DEBUG:   [ 'debug', self.COLOR_GREEN ],
+                        self.INFO:    [ 'info',  self.COLOR_GREEN ],
+                        self.WARNING: [ 'warn',  self.COLOR_RED   ],
+                        self.ERROR:   [ 'error', self.COLOR_RED   ], }
+        self.color = False
+        self.level = self.INFO
+
+    def set_level(self, level):
+        self.level = level
+
+    def set_color(self, color):
+        if type(color) == type(True):
+            self.color = color
+        else:
+            if color.lower() == "on":
+                self.color = True
+            elif color.lower() == "auto":
+                if (sys.stderr.isatty() and
+                    sys.stdout.isatty()):
+                    self.color = True
+            else:
+                self.color = False
+
+        if self.color:
+            self.get_color = self._color
+            self.get_coloroff = self._color_off
+        else:
+            self.get_color = self.get_coloroff = self._color_dummy
+
+    def _color_dummy(self, level=None):
+        return ""
+
+    def _color(self, level):
+        return self.COLOR_SEQ % (self.levels[level][1])
+
+    def _color_off(self):
+        return self.COLOR_SEQ % self.COLOR_NONE
+
+
+    def log(self, level, message):
+        if level < self.level:
+            return
+
+        out = [sys.stdout, sys.stderr][level >= self.WARNING]
+        print >>out, self.format % { 'levelname': self.levels[level][0],
+                                     'color': self.get_color(level),
+                                     'message': message,
+                                     'coloroff': self.get_coloroff()}
+
+
+def err(msg):
+    logger.log(Logger.ERROR, msg)
+
+def warn(msg):
+    logger.log(Logger.WARNING, msg)
+
+def info(msg):
+    logger.log(Logger.INFO, msg)
+
+def debug(msg):
+    logger.log(Logger.DEBUG, msg)
+
+def setup(color, verbose):
+    logger.set_color(color)
+    if verbose:
+        logger.set_level(Logger.DEBUG)
+
+if not logger:
+    logger = Logger()
+
-- 
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