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