core (constants), tools (common/ansi): moved ANSI escape codes to a dedicated class, with helper methods

src/core/constants.py

@@ -313,17 +313,6 @@ class Const(object):
     DEFAULT_MAX_AGE = 1209600 # default max age of cached files, in seconds
     HASH_SHA1_EMPTY = 'da39a3ee5e6b4b0d3255bfef95601890afd80709'
 
-
-    ## ANSI escape sequences ##
-    # XXX: used for logging
-    # XXX: they will be probably moved in a dedicated module in the future
-    ANSI_RESET = '\033[0m'
-    ANSI_NORMAL_WEIGHT = '\033[22m'
-    ANSI_FG_BLACK, ANSI_FG_RED, ANSI_FG_GREEN, ANSI_FG_YELLOW, ANSI_FG_BLUE, ANSI_FG_MAGENTA, ANSI_FG_CYAN, ANSI_FG_WHITE = ('\033[3%dm' % nb for nb in xrange(8))
-    ANSI_BOLD = '\033[1m'
-    ANSI_BLINK = '\033[5m'
-    ANSI_BLINK_OFF = '\033[25m'
-
     @classmethod
     def LOG_OPTIONS(cls):
         """Return options checked for logs"""