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#
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# Sets history options and defines history aliases.
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#
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# Authors:
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# Robby Russell <robby@planetargon.com>
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# Sorin Ionescu <sorin.ionescu@gmail.com>
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#
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#
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# Options
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#
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setopt BANG_HIST # Treat the '!' character specially during expansion.
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setopt EXTENDED_HISTORY # Write the history file in the ':start:elapsed;command' format.
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setopt SHARE_HISTORY # Share history between all sessions.
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setopt HIST_EXPIRE_DUPS_FIRST # Expire a duplicate event first when trimming history.
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setopt HIST_IGNORE_DUPS # Do not record an event that was just recorded again.
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setopt HIST_IGNORE_ALL_DUPS # Delete an old recorded event if a new event is a duplicate.
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setopt HIST_FIND_NO_DUPS # Do not display a previously found event.
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setopt HIST_IGNORE_SPACE # Do not record an event starting with a space.
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setopt HIST_SAVE_NO_DUPS # Do not write a duplicate event to the history file.
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setopt HIST_VERIFY # Do not execute immediately upon history expansion.
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setopt HIST_BEEP # Beep when accessing non-existent history.
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#
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# Variables
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#
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HISTFILE="${HISTFILE:-${ZDOTDIR:-$HOME}/.zsh_history}" # The path to the history file.
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HISTSIZE=10000 # The maximum number of events to save in the internal history.
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SAVEHIST=10000 # The maximum number of events to save in the history file.
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#
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# Aliases
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#
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# Lists the ten most used commands.
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alias history-stat="history 0 | awk '{print \$2}' | sort | uniq -c | sort -n -r | head"
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if [[ -s "${OLD_HISTFILE::=${HISTFILE:h}/.zhistory}" ]]; then
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# New 'HISTFILE' doesn't exist yet, rename legacy one if available and notify.
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if [[ ! -s "$HISTFILE" ]]; then
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<<EON
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NOTICE: Default path of 'HISTFILE' has changed from '${OLD_HISTFILE/#$HOME/~}'
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to '${HISTFILE/#$HOME/~}'.
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Attempting to rename the existing 'HISTFILE' ...
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EON
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mv -v "$OLD_HISTFILE" "$HISTFILE"
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# New 'HISTFILE' does exist and is older than legacy one, just warn.
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elif [[ "$OLD_HISTFILE" -nt "$HISTFILE" ]]; then
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<<EOW
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WARNING: Default path of 'HISTFILE' has changed from '${OLD_HISTFILE/#$HOME/~}'
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to '${HISTFILE/#$HOME/~}'.
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Either set 'HISTFILE' in '${${0:h}/#$HOME/~}'
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or move previous history from '${OLD_HISTFILE/#$HOME/~}' to
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'${HISTFILE/#$HOME/~}'.
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EOW
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fi
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unset OLD_HISTFILE
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fi
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