board/common: improve default bash settings for better UX

Add HISTCONTROL=ignoreboth to ignore duplicate commands and those
starting with space, enable histappend, and improve tab completion
behavior.  Also add /etc/inputrc for better readline key bindings.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

board/common/rootfs/etc/bash.bashrc

@@ -15,6 +15,22 @@ export PROMPT_COMMAND=prompt_command
 # update the values of LINES and COLUMNS.
 shopt -s checkwinsize
 
+# don't put duplicate lines or lines starting with space in the history.
+export HISTCONTROL=ignoreboth
+
+# append to the history file, don't overwrite it
+shopt -s histappend
+
+# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
+export HISTSIZE=1000
+export HISTFILESIZE=2000
+
+# case-insensitive filename completion
+bind "set completion-ignore-case on"
+
+# show all completions immediately instead of ringing bell
+bind "set show-all-if-ambiguous on"
+
 log()
 {
     local fn="/var/log/syslog"

board/common/rootfs/etc/inputrc

@@ -0,0 +1,66 @@
+# /etc/inputrc - global inputrc for libreadline
+
+# Be 8 bit clean.
+set input-meta on
+set output-meta on
+
+# To allow the use of 8bit-characters like the german umlauts, uncomment
+# the line below. However this makes the meta key not work as a meta key,
+# which is annoying to those which don't need to type in 8-bit characters.
+
+# set convert-meta off
+
+# try to enable the application keypad when it is called.  Some systems
+# need this to enable the arrow keys.
+# set enable-keypad on
+
+# see /usr/share/doc/bash/inputrc.arrows for other codes of arrow keys
+
+# do not bell on tab-completion
+# set bell-style none
+# set bell-style visible
+
+# some defaults / modifications for the emacs mode
+$if mode=emacs
+
+# allow the use of the Home/End keys
+"\e[1~": beginning-of-line
+"\e[4~": end-of-line
+
+# allow the use of the Delete/Insert keys
+"\e[3~": delete-char
+"\e[2~": quoted-insert
+
+# mappings for "page up" and "page down" to step to the beginning/end
+# of the history
+# "\e[5~": beginning-of-history
+# "\e[6~": end-of-history
+
+# alternate mappings for "page up" and "page down" to search the history
+"\e[5~": history-search-backward
+"\e[6~": history-search-forward
+
+# mappings for Ctrl-left-arrow and Ctrl-right-arrow for word moving
+"\e[1;5C": forward-word
+"\e[1;5D": backward-word
+"\e[5C": forward-word
+"\e[5D": backward-word
+"\e\e[C": forward-word
+"\e\e[D": backward-word
+
+$if term=rxvt
+"\e[7~": beginning-of-line
+"\e[8~": end-of-line
+"\eOc": forward-word
+"\eOd": backward-word
+$endif
+
+# for non RH/Debian xterm, can't hurt for RH/Debian xterm
+# "\eOH": beginning-of-line
+# "\eOF": end-of-line
+
+# for freebsd console
+# "\e[H": beginning-of-line
+# "\e[F": end-of-line
+
+$endif