# From: "Bart Schaefer" <schaefer>
# Subject: Re: per-directory history?
# 
# On Apr 11, 12:08pm, Matt Pharr wrote:
# } Subject: per-directory history?
# } 
# } I was thinking about the history stuff in zsh last night, and it struck me
# } that it would be neat to have a per-directory history mechanism.
# } 
# } Is this easily done at the user level given zsh's current set of features?
# 
# Relatively easily, yes.  The main issues are security (avoid loading a
# history left for you by someone malicious (though this isn't too bad as
# the commands aren't actually executed)), collision-avoidance in shared
# directories, and handling of non-writable directories.
# 
# The solution looks something like

chpwd() {
    local ohistsize=$HISTSIZE
    fc -W ~-/.history.$UID
    HISTSIZE=0		# Discard previous dir's history
    HISTSIZE=$ohistsize	# Prepare for new dir's history
    fc -R ./.history.$UID
}