bashrc.d/correct_term_setting at master · psmay/bashrc.d · GitHub

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# For slightly off-beat settings of TERM, make a useful guess of what
# setting might be compatible. Without this, terminal-based programs like
# bash and vim are less likely to work correctly. Ensure that
# ncurses/ncurses-term/tput are installed to maximize the number of
# available terminfos.

if is_interactive; then

	# From a comment on
	# http://vim.wikia.com/wiki/256_colors_in_vim

	# In cygwin, make sure ncurses is installed (tput needs it).
	# In ubuntu, be sure to install ncurses-term so that gnome-256color is
	# recognized.

	if [ "$TERM" = "xterm" ] ; then
		if [ -z "$COLORTERM" ] ; then
			if [ -z "$XTERM_VERSION" ] ; then
				echo "Warning: Terminal wrongly calling itself 'xterm'."
			else
				case "$XTERM_VERSION" in
				"XTerm(256)") TERM="xterm-256color" ;;
				"XTerm(88)") TERM="xterm-88color" ;;
				"XTerm") ;;
				*)
					echo "Warning: Unrecognized XTERM_VERSION: $XTERM_VERSION"
					;;
				esac
			fi
		else
			case "$COLORTERM" in
				gnome-terminal)
					# Those crafty Gnome folks require you to check COLORTERM,
					# but don't allow you to just *favor* the setting over TERM.
					# Instead you need to compare it and perform some guesses
					# based upon the value. This is, perhaps, too simplistic.
					TERM="gnome-256color"
					;;
				*)
					echo "Warning: Unrecognized COLORTERM: $COLORTERM"
					;;
			esac
		fi
	fi

	SCREEN_COLORS="`tput colors`"
	if [ -z "$SCREEN_COLORS" ] ; then
		case "$TERM" in
			screen-*color-bce)
				echo "Unknown terminal $TERM. Falling back to 'screen-bce'."
				export TERM=screen-bce
				;;
			*-88color)
				echo "Unknown terminal $TERM. Falling back to 'xterm-88color'."
				export TERM=xterm-88color
				;;
			*-256color)
				echo "Unknown terminal $TERM. Falling back to 'xterm-256color'."
				export TERM=xterm-256color
				;;
		esac
		SCREEN_COLORS=`tput colors`
	fi
	if [ -z "$SCREEN_COLORS" ] ; then
		case "$TERM" in
			gnome*|xterm*|konsole*|aterm|[Ee]term)
				echo "Unknown terminal $TERM. Falling back to 'xterm'."
				export TERM=xterm
				;;
			rxvt*)
				echo "Unknown terminal $TERM. Falling back to 'rxvt'."
				export TERM=rxvt
				;;
			screen*)
				echo "Unknown terminal $TERM. Falling back to 'screen'."
				export TERM=screen
				;;
		esac
		SCREEN_COLORS=`tput colors`
	fi

fi