app-shells/bash: sync bashrc with upstream

sdk_container/src/third_party/coreos-overlay/app-shells/bash/files/bashrc

@@ -20,54 +20,75 @@ fi
 # http://cnswww.cns.cwru.edu/~chet/bash/FAQ (E11)
 shopt -s checkwinsize
 
-# Enable history appending instead of overwriting.  #139609
+# Disable completion when the input buffer is empty.  i.e. Hitting tab
+# and waiting a long time for bash to expand all of $PATH.
+shopt -s no_empty_cmd_completion
+
+# Enable history appending instead of overwriting when exiting.  #139609
 shopt -s histappend
 
+# Save each command to the history file as it's executed.  #517342
+# This does mean sessions get interleaved when reading later on, but this
+# way the history is always up to date.  History is not synced across live
+# sessions though; that is what `history -n` does.
+# Disabled by default due to concerns related to system recovery when $HOME
+# is under duress, or lives somewhere flaky (like NFS).  Constantly syncing
+# the history will halt the shell prompt until it's finished.
+#PROMPT_COMMAND='history -a'
+
 # Change the window title of X terminals 
 case ${TERM} in
-	xterm*|rxvt*|Eterm*|aterm|kterm|gnome*|interix|konsole*)
-		PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/~}\007"'
+	[aEkx]term*|rxvt*|gnome*|konsole*|interix)
+		PS1='\[\033]0;\u@\h:\w\007\]'
 		;;
 	screen*)
-		PROMPT_COMMAND='echo -ne "\033_${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/~}\033\\"'
+		PS1='\[\033k\u@\h:\w\033\\\]'
+		;;
+	*)
+		unset PS1
 		;;
 esac
 
-use_color=false
-#BSD#@# BSD doesn't typically come with dircolors so we need
-#BSD#@# to hardcode some terminals in here.
-#BSD#@case ${TERM} in
-#BSD#@	xterm*|rxvt*|Eterm|aterm|kterm|gnome*|screen|cons25) use_color=true;;
-#BSD#@esac
-
 # Set colorful PS1 only on colorful terminals.
 # dircolors --print-database uses its own built-in database
 # instead of using /etc/DIR_COLORS.  Try to use the external file
-# first to take advantage of user additions.  Use internal bash
-# globbing instead of external grep binary.
-safe_term=${TERM//[^[:alnum:]]/?}   # sanitize TERM
-match_lhs=""
-[[ -f ~/.dir_colors   ]] && match_lhs="${match_lhs}$(<~/.dir_colors)"
-[[ -f /etc/DIR_COLORS ]] && match_lhs="${match_lhs}$(</etc/DIR_COLORS)"
-[[ -z ${match_lhs}    ]] \
-	&& type -P dircolors >/dev/null \
-	&& match_lhs=$(dircolors --print-database)
-[[ $'\n'${match_lhs} == *$'\n'"TERM "${safe_term}* ]] && use_color=true
+# first to take advantage of user additions.
+# We run dircolors directly due to its changes in file syntax and
+# terminal name patching.
+use_color=false
+if type -P dircolors >/dev/null ; then
+	# Enable colors for ls, etc.  Prefer ~/.dir_colors #64489
+	LS_COLORS=
+	if [[ -f ~/.dir_colors ]] ; then
+		eval "$(dircolors -b ~/.dir_colors)"
+	elif [[ -f /etc/DIR_COLORS ]] ; then
+		eval "$(dircolors -b /etc/DIR_COLORS)"
+	else
+		eval "$(dircolors -b)"
+	fi
+	# Note: We always evaluate the LS_COLORS setting even when it's the
+	# default.  If it isn't set, then `ls` will only colorize by default
+	# based on file attributes and ignore extensions (even the compiled
+	# in defaults of dircolors). #583814
+	if [[ -n ${LS_COLORS:+set} ]] ; then
+		use_color=true
+	else
+		# Delete it if it's empty as it's useless in that case.
+		unset LS_COLORS
+	fi
+else
+	# Some systems (e.g. BSD & embedded) don't typically come with
+	# dircolors so we need to hardcode some terminals in here.
+	case ${TERM} in
+	[aEkx]term*|rxvt*|gnome*|konsole*|screen|cons25|*color) use_color=true;;
+	esac
+fi
 
 if ${use_color} ; then
-	# Enable colors for ls, etc.  Prefer ~/.dir_colors #64489
-	if type -P dircolors >/dev/null ; then
-		if [[ -f ~/.dir_colors ]] ; then
-			eval $(dircolors -b ~/.dir_colors)
-		elif [[ -f /etc/DIR_COLORS ]] ; then
-			eval $(dircolors -b /etc/DIR_COLORS)
-		fi
-	fi
-
 	if [[ ${EUID} == 0 ]] ; then
-		PS1='\[\033[01;31m\]\h\[\033[01;34m\] \W \$\[\033[00m\] '
+		PS1+='\[\033[01;31m\]\h\[\033[01;34m\] \W \$\[\033[00m\] '
 	else
-		PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
+		PS1+='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
 	fi
 
 	#BSD#@export CLICOLOR=1
@@ -78,11 +99,15 @@ if ${use_color} ; then
 else
 	if [[ ${EUID} == 0 ]] ; then
 		# show root@ when we don't have colors
-		PS1='\u@\h \W \$ '
+		PS1+='\u@\h \W \$ '
 	else
-		PS1='\u@\h \w \$ '
+		PS1+='\u@\h \w \$ '
 	fi
 fi
 
+for sh in /etc/bash/bashrc.d/* ; do
+	[[ -r ${sh} ]] && source "${sh}"
+done
+
 # Try to keep environment pollution down, EPA loves us.
-unset use_color safe_term match_lhs
+unset use_color sh

sdk_container/src/third_party/coreos-overlay/app-shells/bash/files/dot-bash_profile

@@ -2,4 +2,6 @@
 
 # This file is sourced by bash for login shells.  The following line
 # runs your .bashrc and is recommended by the bash info pages.
-[[ -f ~/.bashrc ]] && . ~/.bashrc
+if [[ -f ~/.bashrc ]] ; then
+	. ~/.bashrc
+fi