Current File : //usr/share/zsh/5.0.2/functions/cdr
# Description
# ===========
#
# Change to a recently used directory recorded in a file so that the
# recent file list persists across sessions.
#
# To use this system,
#
# autoload -Uz chpwd_recent_dirs cdr add-zsh-hook
# add-zsh-hook chpwd chpwd_recent_dirs
#
# (add-zsh-hook appeared in zsh version 4.3.4.) This ensures that all
# directories you change to interactively are registered. The
# chpwd_recent_dirs function does some guesswork to see if you are "really"
# changing directory permanently, see below.
#
# The argument to cdr is a number corresponding to the Nth most recently
# changed-to directory starting at 1 for the immediately preceding
# directory (the current directory is remembered but is not offered as a
# destination). You can use directory arguments if you set the
# recent-dirs-default style, see below; however, it should be noted
# that if you do you gain nothing over using cd directly (the recent
# directory list is updated in either case).
#
# If the argument is omitted, 1 is assumed.
#
# Completion is available if compinit has been run; menu selection is
# recommended, using
#
# zstyle ':completion:*:*:cdr:*:*' menu selection
#
# and also the verbose style to ensure the directory is shown (this
# is on by default).
#
# Options
# =======
#
# "cdr -l" lists the numbers and the corresponding directories in
# abbreviated form (i.e. with "~" substitution reapplied), one per line.
# The directories here are not quoted (this would only be an issue if a
# directory name contained a newline). This is used by the completion
# system.
#
# "cdr -r" sets the parameter "reply" to the current set of directories.
#
# "cdr -e" allows you to edit the list of directories, one per line. The
# list can be edited to any extent you like; no sanity checking is
# performed. Completion is available. No quoting is necessary (except for
# newlines, where I have in any case no sympathy); directories are in
# unabbreviated from and contain an absolute path, i.e. they start with /
# (and only /). Usually the first entry should be left as the current
# directory.
#
# Details of directory handling
# =============================
#
# Recent directories are saved to a file immediately and hence are
# preserved across sessions. Note currently no file locking is applied:
# the list is updated immediately on interactive commands and nowhere else
# (unlike history), and it is assumed you are only going to change
# directory in one window at once. This is not safe on shared accounts,
# but in any case the system has limited utility when someone else is
# changing to a different set of directories behind your back.
#
# To make this a little safer, only directory changes instituted from the
# command line, either directly or indirectly through shell function calls
# (but not through subshells, evals, traps, completion functions and the
# like) are saved. This works best in versions of the shell from 4.3.11
# which has facilities to check the evaluation context. Shell functions
# should use cd -q or pushd -q to avoid side effects if the change to the
# directory is to be invisible at the command line. See the function
# chpwd_recent_dirs for more details.
#
# Styles
# ======
#
# Various styles are available. The context for setting styles should be
# ':chpwd:*' in case the meaning of the context is extended in future, for
# example:
#
# zstyle ':chpwd:*' recent-dirs-max 0
#
# although the style name is specific enough that a context of '*' should
# be fine in practice. The only exception is recent-dirs-insert, which is
# used exclusively by the completion system and so has the usual completion
# system context (':completion:*' if nothing more specific is needed,
# though again '*' should be fine in practice).
#
# recent-dirs-default
# If true, and the command is expecting a recent directory index, and
# either there is more than one argument or the argument is not an
# integer, then fall through to "cd". This allows the lazy to use only
# one command for directory changing. Completion recognises this, too;
# see recent-dirs-insert for how to control completion when this option
# is in use.
#
# recent-dirs-file
# The file where the list of directories is saved. The default
# is ${ZDOTDIR:-$HOME}/.chpwd-recent-dirs, i.e. this is in your
# home directory unless you have set ZDOTDIR to point somewhere else.
# Directory names are saved in $'...' quoted form, so each line
# in the file can be supplied directly to the shell as an argument.
#
# The value of this style may be an array. In this case, the first
# file in the list will always be used for saving directories while any
# other files are left untouched. When reading the recent directory
# list, if there are fewer than the maximum number of entries in the
# first file, the contents of later files in the array will be appended
# with duplicates removed from the list shown. The contents of the two
# files are not sorted together, i.e. all the entries in the first file
# are shown first. The special value "+" can appear in the list to
# indicate the default file should be read at that point. This allows
# effects like the following:
#
# zstyle recent-dirs-file ':chpwd:*' ~/.chpwd-recent-dirs-${TTY##*/} +
#
# Recent directories are read from a file numbered according to
# the terminal. If there are insufficient entries the list
# is supplemented from the default file.
#
# recent-dirs-insert
# Used by completion. If recent-dirs-default is true, then setting
# this to true causes the actual directory, rather than its index, to
# be inserted on the command line; this has the same effect as using
# the corresponding index, but makes the history clearer and the line
# easier to edit. With this setting, if part of an argument was
# already typed, normal directory completion rather than recent
# directory completion is done; this is because recent directory
# completion is expected to be done by cycling through entries menu
# fashion. However, if the value of the style is "always", then only
# recent directories will be completed; in that case, use the cd
# command when you want to complete other directories. If the value is
# "fallback", recent directories will be tried first, then normal
# directory completion is performed if recent directory completion
# failed to find a match. Finally, if the value is "both" then both
# sets of completions are presented; the usual tag mechanism can be
# used to distinguish results, with recent directories tagged as
# "recent-dirs". Note that the recent directories inserted are
# abbreviated with directory names where appropriate.
#
# recent-dirs-max
# The maximum number of directories to save to the file. If
# this is zero or negative there is no maximum. The default is 20.
# Note this includes the current directory, which isn't offered,
# so the highest number of directories you will be offered
# is one less than the maximum.
#
# recent-dirs-prune
# This style is an array determining what directories should (or should
# not) be added to the recent list. Elements of the array can include:
# parent
# Prune parents (more accurately, ancestors) from the recent list.
# If present, changing directly down by any number of directories
# causes the current directory to be overwritten. For example,
# changing from ~pws to ~pws/some/other/dir causes ~pws not to be
# left on the recent directory stack. This only applies to direct
# changes to descendant directories; earlier directories on the
# list are not pruned. For example, changing from ~pws/yet/another
# to ~pws/some/other/dir does not cause ~pws to be pruned.
# pattern:<pattern>
# Gives a zsh pattern for directories that should not be
# added to the recent list (if not already there). This element
# can be repeated to add different patterns. For example,
# 'pattern:/tmp(|/*)' stops /tmp or its descendants from being
# added. The EXTENDED_GLOB option is always turned on for
# these patterns.
#
# recent-dirs-pushd
# If set to true, cdr will use pushd instead of cd to change the
# directory, so the directory is saved on the directory stack. As the
# directory stack is completely separate from the list of files saved
# by the mechanism used in this file there is no obvious reason to do
# this.
#
# Use with dynamic directory naming
# =================================
#
# It is possible to refer to recent directories using the dynamic directory
# name syntax that appeared in zsh version 4.3.7. If you create and
# autoload a function zsh_directory_name containing the following code,
# ~[1] will refer to the most recent directory other than $PWD, and so on.
# This also includes completion (version 4.3.11 is required for this to
# work; previous versions needed the file _dynamic_directory_name to
# be overloaded).
#
# if [[ $1 = n ]]; then
# if [[ $2 = <-> ]]; then
# # Recent directory
# typeset -ga reply
# autoload -Uz cdr
# cdr -r
# if [[ -n ${reply[$2]} ]]; then
# reply=(${reply[$2]})
# return 0
# else
# reply=()
# return 1
# fi
# fi
# elif [[ $1 = c ]]; then
# if [[ $PREFIX = <-> || -z $PREFIX ]]; then
# typeset -a keys values
#
# values=(${${(f)"$(cdr -l)"}/ ##/:})
# keys=(${values%%:*})
#
# _describe -t dir-index 'recent directory index' \
# values keys -V unsorted -S']'
# return
# fi
# fi
# return 1
emulate -L zsh
setopt extendedglob
autoload -Uz chpwd_recent_filehandler chpwd_recent_add
integer list set_reply i bad edit
local opt dir
local -aU dirs
while getopts "elr" opt; do
case $opt in
(e)
edit=1
;;
(l)
list=1
;;
(r)
set_reply=1
;;
(*)
return 1
;;
esac
done
shift $(( OPTIND - 1 ))
if (( set_reply )); then
typeset -ga reply
else
local -a reply
fi
if (( list || set_reply || edit )); then
(( $# )) && bad=1
else
if [[ $#1 -eq 0 ]]; then
1=1
elif [[ $# -ne 1 || $1 != <-> ]]; then
if zstyle -t ':chpwd:' recent-dirs-default; then
cd "$@"
return
else
bad=1
fi
fi
fi
if (( bad )); then
print "Usage: $0 [-l | -r | <dir-num> ]
Use $0 -l or completion to see possible directories."
return 1
fi
chpwd_recent_filehandler
if [[ $PWD != $reply[1] ]]; then
# When we first start we don't have the current directory.
# Add it now for consistency.
chpwd_recent_add $PWD && chpwd_recent_filehandler $reply
fi
if (( edit )); then
local compcontext='directories:directory:_path_files -/'
IFS='
' vared reply || return 1
chpwd_recent_filehandler $reply
fi
# Skip current directory if present (may have been pruned).
[[ $reply[1] = $PWD ]] && reply=($reply[2,-1])
if (( list )); then
dirs=($reply)
for (( i = 1; i <= ${#dirs}; i++ )); do
print -n ${(r.5.)i}
print -r ${(D)dirs[i]}
done
return
fi
(( set_reply || edit )) && return
if (( $1 > ${#reply} )); then
print "Not enough directories ($(( ${#dirs} - 1)) possibilities)" >&2
return 1
fi
dir=${reply[$1]}
if zstyle -t ':chpwd:' recent-dirs-pushd; then
pushd -- $dir
else
cd -- $dir
fi
Mini Shell