[bashrc] Color only if supported by term

.bashrc

@@ -71,8 +71,11 @@ fi
 #~#     done
 #~#     if [ -n "$LTYPE" ];
 #~#     then
-#~#         echo $LTYPE
-#~#         VCS_info="${nocolor}${violet}(${nocolor}$LTYPE${violet})-${violet}[${vert}$LBRANCH${violet}]${nocolor}"
+#~#         if [ "$color_prompt" = yes ]; then
+#~#             VCS_info="${nocolor}${violet}(${nocolor}$LTYPE${violet})-${violet}[${vert}$LBRANCH${violet}]${nocolor}"
+#~#         else
+#~#             VCS_info="($LTYPE)-[$LBRANCH]"
+#~#         fi
 #~#         VCS_size=$((${#LTYPE}+${#LBRANCH}+5))
 #~#     else
 #~#         VCS_info=""
@@ -142,13 +145,29 @@ function prompt_command
 	    DIR=$pwd
         POST_DIR='${MINUS_LINE:'${#pwd}+${VCS_size}+1'+${#?}}'
     fi
-    DIR="< ${jaune}"$DIR"${cyan} >"
-    ERR='[ \[\e[1;$((31+($?==0)*6))m\]$?'${cyan}' ]'$MINUS_CHAR
-    DATE="( ${violet}\D{%H:%M:%S}${cyan} )"
-    PROMPT="${rouge}\u${vert}@${bleu}\h ${vert}\$ ${nocolor}"
-    PS1=$TITLE${cyan}$MINUS_CHAR$DATE$MINUS_CHAR$DIR$MINUS_CHAR$VCS_info${cyan}$POST_DIR$ERR'\n'$PROMPT
+    if [ "$color_prompt" = yes ]; then
+        DIR="< ${jaune}"$DIR"${cyan} >"
+        ERR='[ \[\e[1;$((31+($?==0)*6))m\]$?'${cyan}' ]'$MINUS_CHAR
+        DATE="( ${violet}\D{%H:%M:%S}${cyan} )"
+        PROMPT="${rouge}\u${vert}@${bleu}\h ${vert}\$ ${nocolor}"
+        PS1=$TITLE${cyan}$MINUS_CHAR$DATE$MINUS_CHAR$DIR$MINUS_CHAR$VCS_info${cyan}$POST_DIR$ERR'\n'$PROMPT
+    else
+        DIR="< "$DIR" >"
+        ERR='[ $? ]'$MINUS_CHAR
+        DATE="( \D{%H:%M:%S} )"
+        PROMPT="\u@\h \$ "
+        PS1=$TITLE$MINUS_CHAR$DATE$MINUS_CHAR$DIR$MINUS_CHAR$VCS_info$POST_DIR$ERR'\n'$PROMPT
+    fi
 }
 
+if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
+    # support de la couleur
+    color_prompt=yes
+else
+    # pas de support de la couleur
+    color_prompt=no
+fi
+
 # On change le titre de la fenêtre dynamiquement si on est sous X
 if [[ $TERM = "xterm" ]]; then
     TITLE='\[\e];\u@\h:\w\a\]'
@@ -169,9 +188,15 @@ if [[ $(uname) == Linux && ( $(locale charmap) == UTF-8 && $TERM != screen ) ]];
     date=$(/bin/date +"%R, %A %d %B %Y")
     redate=${date//é/e}
     redate=${redate//û/u}
-    echo -e "\e[1;36m┬─${redate//?/─}──┬${MINUS_LINE:${#date}-18}\n\
+    if [ "$color_prompt" = yes ]; then
+        echo -e "\e[1;36m┬─${redate//?/─}──┬${MINUS_LINE:${#date}-18}\n\
 │ \e[1;37m$date\e[1;31m \e[1;36m │\n\
 └─${redate//?/─}──┘\e[0m\n"
+    else
+        echo -e "┬─${redate//?/─}──┬${MINUS_LINE:${#date}-18}\n\
+│ $date  │\n\
+└─${redate//?/─}──┘\n"
+    fi
     unset date
 else
     MINUS_CHAR=-