Enable colored output for loggingLOG-380-shared

ColorFormatter class uses ANSI esacpe sequences
to render logging message in color, it uses standard colors
so it should workd on any UNIX terminal.

Make markerFormatter class to inherits from colorFormatter.

Change-Id: Ie24a06df861ca5d07796e78dea7e875daf149380
Issue-ID: MULTICLOUD-329
Signed-off-by: liangke <lokyse@163.com>

1 files changed, 143 insertions, 0 deletions

diff --git a/pylog/onaplogging/colorFormatter.py b/pylog/onaplogging/colorFormatter.py
new file mode 100644
index 0000000..a60e441
--- /dev/null
+++ b/pylog/onaplogging/colorFormatter.py
@@ -0,0 +1,143 @@
+# Copyright 2018 ke liang <lokyse@163.com>.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import sys
+import logging
+from logging import Formatter
+
+
+ATTRIBUTES = {
+    'normal': 0,
+    'bold': 1,
+    'underline': 4,
+    'blink': 5,
+    'invert': 7,
+    'hide': 8,
+
+}
+
+
+HIGHLIGHTS = {
+
+    'black': 40,
+    'red':  41,
+    'green': 42,
+    'yellow': 43,
+    'blue': 44,
+    'purple': 45,
+    'cyan': 46,
+    'white': 47,
+}
+
+COLORS = {
+
+    'black': 30,
+    'red': 31,
+    'green': 32,
+    'yellow': 33,
+    'blue': 34,
+    'purple': 35,
+    'cyan': 36,
+    'white': 37,
+}
+
+COLOR_TAG = "color"
+HIGHLIGHT_TAG = "highlight"
+ATTRIBUTE_TAG = "attribute"
+
+RESET = '\033[0m'
+
+
+def colored(text, color=None, on_color=None, attrs=None):
+    # It can't support windows system cmd right now!
+    # TODO: colered output on windows system cmd
+    if os.name in ('nt', 'ce'):
+        return text
+
+    if isinstance(attrs, str):
+        attrs = [attrs]
+
+    if os.getenv('ANSI_COLORS_DISABLED', None) is None:
+        fmt_str = '\033[%dm%s'
+        if color is not None and isinstance(color, str):
+            text = fmt_str % (COLORS.get(color, 0), text)
+
+        if on_color is not None and isinstance(on_color, str):
+            text = fmt_str % (HIGHLIGHTS.get(on_color, 0), text)
+
+        if attrs is not None:
+            for attr in attrs:
+                text = fmt_str % (ATTRIBUTES.get(attr, 0), text)
+
+        #  keep origin color for tail spaces
+        text += RESET
+    return text
+
+
+class BaseColorFormatter(Formatter):
+
+    def __init__(self, fmt=None, datefmt=None, colorfmt=None, style="%"):
+        if sys.version_info > (3, 2):
+            super(BaseColorFormatter, self).__init__(
+                fmt=fmt, datefmt=datefmt, style=style)
+        elif sys.version_info > (2, 7):
+            super(BaseColorFormatter, self).__init__(fmt, datefmt)
+        else:
+            Formatter.__init__(self, fmt, datefmt)
+
+        self.style = style
+        if sys.version_info > (3, 2):
+            if self.style not in logging._STYLES:
+                raise ValueError('Style must be one of: %s' % ','.join(
+                        logging._STYLES.keys()))
+
+        self.colorfmt = colorfmt
+
+        print(self.colorfmt, isinstance(self.colorfmt, dict))
+
+    def _parseColor(self, record):
+        """
+        color formatter for instance:
+        {
+            "logging-levelname":
+                {
+                    "color":"<COLORS>",
+                    "highlight":"<HIGHLIGHTS>",
+                    "attribute":"<ATTRIBUTES>",
+                }
+        }
+        :param record:
+        :return: text color, background color, text attribute
+        """
+        if self.colorfmt and isinstance(self.colorfmt, dict):
+
+            level = record.levelname
+            colors = self.colorfmt.get(level, None)
+
+            if colors is not None and isinstance(colors, dict):
+                return colors.get(COLOR_TAG, None), \
+                       colors.get(HIGHLIGHT_TAG, None), \
+                       colors.get(ATTRIBUTE_TAG, None)
+
+        return None, None, None
+
+    def format(self, record):
+
+        if sys.version_info > (2, 7):
+            s = super(BaseColorFormatter, self).format(record)
+        else:
+            s = Formatter.format(self, record)
+        color, on_color, attribute = self._parseColor(record)
+        return colored(s, color, on_color, attrs=attribute)