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https://github.com/ohmybash/oh-my-bash.git
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97 lines
4.0 KiB
Bash
97 lines
4.0 KiB
Bash
#! bash oh-my-bash.module
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## Command history configuration
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if [ -z "$HISTFILE" ]; then
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HISTFILE=$HOME/.bash_history
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fi
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# some moderate history controls taken from sensible.bash
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## SANE HISTORY DEFAULTS ##
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# Append to the history file, don't overwrite it
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shopt -s histappend
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# Save multi-line commands as one command
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shopt -s cmdhist
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# Re-edit the command line for failing history expansions
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shopt -s histreedit
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# Re-edit the result of history expansions
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shopt -s histverify
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# save history with newlines instead of ; where possible
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shopt -s lithist
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# Record each line as it gets issued
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_omb_util_add_prompt_command 'history -a'
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# Unlimited history size. Doesn't appear to slow things down, so why not?
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# Export these variables to apply them also to the child shell sessions.
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#
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# Note: There are multiple ways to realize the unlimited history size.
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#
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# 1) A documented way is HISTSIZE=-1. However, this is only supported in bash
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# >= 4.3 and it causes clearing the user's history in bash < 4.3. Even if
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# we use HISTSIZE=-1 only when the current Bash version is 4.3 or above, it
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# clears the user's history file when a lower version of Bash is in the
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# system and it is started without setting HISTSIZE (e.g. when the Bash is
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# started with --norc or the specified init file is broken). One could
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# consider giving up making HISTSIZE and HISTFILESIZE environment variables,
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# but then it truncates the user's history file when a new Bash is started
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# without setting HISTSIZE.
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#
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# 2) Another well known trick is to set HISTSIZE and HISTFILESIZE to an empty
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# string. This works as unlimited history in all the Bash versions.
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# However, an empty HISTSIZE environment variable causes a startup error in
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# Mksh. One could consider giving up making HISTSIZE environment variable,
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# but again, this will truncate the user's history file with Bash without
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# configuration. One might consider defining a shell function or an alias to
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# start mksh without the HISTSIZE environment variable, but the users
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# wouldn't like it. In addition, the truncated history problem persists with
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# the child Bash started within persists.
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#
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# 3) We instead consider explicitly specifying to HISTSIZE a large number that
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# is unlikely to be reached. A typical value might be 10000 or 100000, but
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# that can still be reached by heavy users. We instead specify a number as
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# large as possible. The number shall not exceed INT_MAX, or otherwise
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# HISTSIZE becomes negative and clears the user's history. In case there is
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# a system where `int' is a 16-bit signed integer, we choose 0x7FFF7FFF so
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# that the lower word is 0x7FFF. This still does not ensure that the 16-bit
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# integer becomes 0x7FFF after overflow (since the overflow of the signed
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# integer causes the undefined behavior in the C standard), but it is safer
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# in typical implementations.
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#
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# See discussion on https://github.com/ohmybash/oh-my-bash/issues/586.
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export HISTSIZE=$((0x7FFF7FFF))
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export HISTFILESIZE=$((0x7FFF7FFF))
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# Avoid duplicate entries
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HISTCONTROL="erasedups:ignoreboth"
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# Don't record some commands
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HISTIGNORE="exit:ls:bg:fg:history:clear"
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# Enable incremental history search with up/down arrows (also Readline goodness)
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# Learn more about this here: https://codeinthehole.com/tips/the-most-important-command-line-tip-incremental-history-searching-with-inputrc/
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# bash4 specific ??
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bind '"\e[A": history-search-backward'
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bind '"\e[B": history-search-forward'
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bind '"\e[C": forward-char'
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bind '"\e[D": backward-char'
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# Use standard ISO 8601 timestamp
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# %F equivalent to %Y-%m-%d
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# %T equivalent to %H:%M:%S (24-hours format)
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# Show history
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case $HIST_STAMPS in
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"[mm/dd/yyyy]") HISTTIMEFORMAT=$'\033[31m[%m/%d/%Y] \033[36m[%T]\033[0m ' ;;
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"[dd.mm.yyyy]") HISTTIMEFORMAT=$'\033[31m[%d.%m.%Y] \033[36m[%T]\033[0m ' ;;
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"[yyyy-mm-dd]") HISTTIMEFORMAT=$'\033[31m[%F] \033[36m[%T]\033[0m ' ;;
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"mm/dd/yyyy") HISTTIMEFORMAT='%m/%d/%Y %T ' ;;
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"dd.mm.yyyy") HISTTIMEFORMAT='%d.%m.%Y %T ' ;;
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"yyyy-mm-dd"|*) HISTTIMEFORMAT='%F %T ' ;;
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esac
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