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Adopt varstash from http://github.com/cxreg/smartcd 

Decouple it from smartcd and consider it zsh-only.

This also adds required library functions from smartcd's
lib/core/arrays.
This commit is contained in:
Daniel Hahler 2014-11-15 20:01:38 +01:00
parent 54124e128b
commit 0bcbeb5ae5
1 changed files with 43 additions and 108 deletions
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151
lib/varstash
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@ -1,6 +1,8 @@
################################################################################
# Stash/unstash support for per-directory variables
#
# Adopted for zsh-autoenv.
#
# Copyright (c) 2009,2012 Dave Olszewski <cxreg@pobox.com>
# http://github.com/cxreg/smartcd
#
@ -36,18 +38,6 @@
#
# autostash PATH=/something/else
#
# If you run stash, unstash, or varstash interactively, they will instruct
# you on how to create smartcd scripts for performing those actions
# automatically. You can affect this behavior with several variables:
#
# VARSTASH_QUIET - Set if you'd rather not see these notices
#
# VARSTASH_AUTOCONFIG - Set if you want the suggested actions to be
# performed automatically
#
# VARSTASH_AUTOEDIT - Set if you want it to set the values, but also
# give you an opportunity to edit the file
#
# If you attempt to stash the same value twice, a warning will be displayed
# and the second stash will not occur. To make it happen anyway, pass -f
# as the first argument to stash.
@ -65,22 +55,51 @@
#
################################################################################
# Library functions, from smartcd's lib/core/arrays. {{{
function apush() {
local var=$1; shift
eval "$var=(\${$var[@]} \"\$@\")"
}
function alen() {
local var=$1
if [[ -n $var ]]; then
eval "echo \${#$var[@]}"
fi
}
function afirst() {
setopt localoptions && setopt ksharrays
local var=$1
if [[ -n $var ]] && (( $(eval "echo \${#$var[@]}") >= 1 )); then
eval "echo \"\${$var""[0]}\""
fi
}
function ashift() {
setopt localoptions && setopt ksharrays
local var=$1
local _ashift_return=
if [[ -n $var ]] && (( $(eval "echo \${#$var[@]}") >= 1 )); then
eval "_ashift_return=\"\${$var""[0]}\""
eval "$var""[0]=()"
echo "$_ashift_return"
fi
}
# }}}
function stash() {
if [[ $1 == "-f" ]]; then
local force=1; shift
fi
if [[ -n $1 ]] && [[ -z $run_from_smartcd ]] && [[ -z $run_from_autostash ]]; then
local working_dir="${varstash_dir:-$(pwd)}"
local smartcd_dir="$(_smartcd_base)/scripts$working_dir"
local help_action="stashing a variable"
local help_dir=$smartcd_dir
local help_cmd="echo stash $@ >> \"$smartcd_dir/bash_enter\""
local help_which="bash_enter"
_manual_stash_help
fi
while [[ -n $1 ]]; do
if [[ $1 == "alias" && $2 =~ "=" ]]; then
shift
@ -210,16 +229,6 @@ function stash() {
}
function autostash() {
if [[ -n $1 ]] && [[ -z $run_from_smartcd ]]; then
local working_dir="${varstash_dir:-$(pwd)}"
local smartcd_dir="$(_smartcd_base)/scripts$working_dir"
local help_action="autostashing a variable"
local help_dir=$smartcd_dir
local help_cmd="echo autostash $@ >> \"$smartcd_dir/bash_enter\""
local help_which="bash_enter"
_manual_stash_help
fi
local run_from_autostash=1
while [[ -n $1 ]]; do
if [[ $1 == "alias" && $2 =~ "=" ]]; then
@ -240,16 +249,6 @@ function autostash() {
}
function unstash() {
if [[ -n $1 ]] && [[ -z $run_from_smartcd ]] && [[ -z $run_from_autounstash ]]; then
local working_dir=${varstash_dir:-$(pwd)}
local smartcd_dir="$(_smartcd_base)/scripts$working_dir"
local help_action="unstashing a variable"
local help_dir=$smartcd_dir
local help_cmd="echo unstash $@ >> \"$smartcd_dir/bash_leave\""
local help_which="bash_leave"
_manual_stash_help
fi
while [[ -n $1 ]]; do
local unstash_which=$1
if [[ -z $unstash_which ]]; then
@ -335,74 +334,10 @@ function autounstash() {
}
function _mangle_var() {
local mangle_var_where="${varstash_dir:-$(pwd)}"
local mangle_var_where="${varstash_dir:-$PWD}"
mangle_var_where=${mangle_var_where//[^A-Za-z0-9]/_}
local mangled_name=${1//[^A-Za-z0-9]/_}
echo "_tmp_${mangle_var_where}_${mangled_name}"
}
function _manual_stash_help() {
# instruct user how to create bash_enter or bash_leave
if [[ -n $VARSTASH_AUTOEDIT || -n $VARSTASH_AUTOCONFIG ]]; then
if [[ -z $VARSTASH_QUIET ]]; then
echo "varstash: Automatically running $help_cmd"
fi
if [[ ! -d $help_dir ]]; then
mkdir -p "$help_dir"
fi
eval $help_cmd
if [[ -n $VARSTASH_AUTOEDIT ]]; then
varstash_edit $help_which
fi
elif [[ -z $VARSTASH_QUIET ]]; then
echo "############################################################################"
echo "# You are manually $help_action. To automatically perform this"
echo "# whenever you enter this directory, paste the following command(s):"
if [[ ! -d $help_dir ]]; then
echo "mkdir -p \"$help_dir\""
fi
echo "$help_cmd"
echo "############################################################################"
fi
}
# A couple convenient aliases for smartcd_edit
function autostash_edit() {
varstash_edit "$@"
}
function varstash_edit() {
local file="$1"
local dir="$2"
if [[ -n $ZSH_VERSION ]]; then
if [[ $(type smartcd_edit) == "smartcd_edit is a shell function" ]]; then
local can_run=1
fi
else
if [[ $(type -t smartcd_edit) == "function" ]]; then
local can_run=1
fi
fi
if [[ -n "$can_run" ]]; then
# XXX - no support for "--host" or "--system" with this (yet?)
_smartcd_file_check "$file" "global" "" edit "$dir"
else
echo "smartcd not loaded, cannot run smartcd_edit"
fi
}
# Run deferred smartcd if we're waiting for it, and arrays is also loaded
if [[ -n "$smartcd_initially_deferred" && -n "$(fn_exists apush)" && -z "$SMARTCD_NOINITIAL" ]]; then
smartcd_skip_action=1
smartcd_run_mainline=1
smartcd cd
unset smartcd_skip_action
unset smartcd_initially_deferred
fi
# vim: filetype=sh autoindent expandtab shiftwidth=4 softtabstop=4