add color variables

shrc

@@ -1185,18 +1185,57 @@ __my_alert_fail(){
     test $laststatus -eq 0 || echo '!!! '
 }
 
+__attr_beg='\[\033['
+__attr_end='m\]'
+
+__color_default="${__attr_beg}0${__attr_end}"
+
+__color_black="${__attr_beg}0;30${__attr_end}"
+__color_red="${__attr_beg}0;31${__attr_end}"
+__color_green="${__attr_beg}0;32${__attr_end}"
+__color_brown="${__attr_beg}0;33${__attr_end}"
+__color_blue="${__attr_beg}0;34${__attr_end}"
+__color_purple="${__attr_beg}0;35${__attr_end}"
+__color_cyan="${__attr_beg}0;36${__attr_end}"
+__color_light_gray="${__attr_beg}0;37${__attr_end}"
+
+__color_dark_gray="${__attr_beg}1;30${__attr_end}"
+__color_light_red="${__attr_beg}1;31${__attr_end}"
+__color_light_green="${__attr_beg}1;32${__attr_end}"
+__color_yellow="${__attr_beg}1;33${__attr_end}"
+__color_light_blue="${__attr_beg}1;34${__attr_end}"
+__color_light_purple="${__attr_beg}1;35${__attr_end}"
+__color_light_cyan="${__attr_beg}1;36${__attr_end}"
+__color_white="${__attr_beg}1;37${__attr_end}"
+
+__color_bg_black="${__attr_beg}40${__attr_end}"
+__color_bg_red="${__attr_beg}41${__attr_end}"
+__color_bg_green="${__attr_beg}42${__attr_end}"
+__color_bg_brown="${__attr_beg}43${__attr_end}"
+__color_bg_blue="${__attr_beg}44${__attr_end}"
+__color_bg_purple="${__attr_beg}45${__attr_end}"
+__color_bg_cyan="${__attr_beg}46${__attr_end}"
+__color_bg_light_gray="${__attr_beg}47${__attr_end}"
+
+__attr_underline="${__attr_beg}4${__attr_end}"
+__attr_reverse="${__attr_beg}7${__attr_end}"
+
+# NOTE: tput is another easy way to set colors and background
+# For example, "$(tput setab 4)text$(tput sgr0)" print text with background
+# color blue.
+
 if test "$TERM" != dumb
 then
-    __my_c1='\[\033[0;33m\]'       # color for PWD
-    __my_c2='\[\033[0;36m\]'         # color for user
-    __my_c3='\[\033[1;30m\]'       # color for OLDPWD
-    if test "`hostname`" = arch-aspireone; then __my_c4='\[\033[1;34m\]'
-    elif test "`hostname`" = darwin-mba.local; then __my_c4='\[\033[1;31m\]'
-    elif test "`hostname`" = newkiwi; then __my_c4='\[\033[1;35m\]'
-    else __my_c4='\[\033[1;32m\]'       # color for ::
+    __my_c1="$__color_brown"      # color for PWD
+    __my_c2="$__color_cyan"       # color for user and hostname
+    # color for ::
+    if test "`hostname`" = arch-aspireone; then __my_c4="$__color_light_blue"
+    elif test "`hostname`" = darwin-mba.local; then __my_c4="$__color_light_red"
+    elif test "`hostname`" = newkiwi; then __my_c4="$__color_light_purple"
+    else __my_c4="$__color_light_green"
     fi
-    __my_c5='\[\033[30;47m\]'        # color for SCR
-    __my_cdef='\[\033[0m\]'
+    __my_c5="$__color_black$__color_bg_light_gray"        # color for SCR
+    __my_cdef="$__color_default"
 fi
 
 _ps1_bash="\