2 # https://github.com/joshuaclayton/dotfiles/blob/master/zsh_profile.d/autoenv.zsh
4 export AUTOENV_ENV_FILENAME=$HOME/.env_auth
6 # Name of file to look for when entering directories.
7 : ${AUTOENV_FILE_ENTER:=.env}
9 # Name of file to look for when leaving directories.
10 # Requires AUTOENV_HANDLE_LEAVE=1.
11 : ${AUTOENV_FILE_LEAVE:=.env.leave}
13 # Look for .env in parent dirs?
14 : ${AUTOENV_LOOK_UPWARDS:=1}
16 # Handle leave events when changing away from a subtree, where an "enter"
18 : ${AUTOENV_HANDLE_LEAVE:=1}
20 # Enable debugging. Multiple levels are supported (max 2).
23 # Public helper functions, which can be used from your .env files:
25 # Source the next .env file from parent directories.
26 # This is useful if you want to use a base .env file for a directory subtree.
27 autoenv_source_parent() {
28 local parent_env_file=$(_autoenv_get_file_upwards $PWD)
30 if [[ -n $parent_env_file ]] \
31 && _autoenv_check_authorized_env_file $parent_env_file; then
32 _autoenv_debug "Calling autoenv_source_parent: parent_env_file:$parent_env_file"
34 local parent_env_dir=${parent_env_file:A:h}
36 _autoenv_stack_entered_add $parent_env_file
38 _autoenv_source $parent_env_file enter $parent_env_dir
42 # Internal functions. {{{
43 # Internal: stack of entered (and handled) directories. {{{
44 typeset -a _autoenv_stack_entered
45 typeset -A _autoenv_stack_entered_mtime
47 # Add an entry to the stack, and remember its mtime.
48 _autoenv_stack_entered_add() {
51 _autoenv_debug "[stack] adding: $env_file" 2
53 # Remove any existing entry.
54 _autoenv_stack_entered_remove $env_file
56 # Append it to the stack, and remember its mtime.
57 _autoenv_stack_entered+=($env_file)
58 _autoenv_stack_entered_mtime[$env_file]=$(_autoenv_get_file_mtime $env_file)
61 _autoenv_get_file_mtime() {
69 # Remove an entry from the stack.
70 _autoenv_stack_entered_remove() {
72 _autoenv_debug "[stack] removing: $env_file" 2
73 _autoenv_stack_entered[$_autoenv_stack_entered[(i)$env_file]]=()
74 _autoenv_stack_entered_mtime[$env_file]=
77 # Is the given entry already in the stack?
78 _autoenv_stack_entered_contains() {
80 if (( ${+_autoenv_stack_entered[(r)${env_file}]} )); then
82 if [[ $_autoenv_stack_entered_mtime[$env_file] == $(_autoenv_get_file_mtime $env_file) ]]; then
83 # Entry has the expected mtime.
91 # Internal function for debug output. {{{
95 if [[ $AUTOENV_DEBUG -lt $level ]]; then
98 # Load zsh color support.
99 if [[ -z $colors ]]; then
103 # Build $indent prefix.
105 if [[ $_autoenv_debug_indent -gt 0 ]]; then
106 for i in {1..${_autoenv_debug_indent}}; do
111 # Split $msg by \n (not newline).
112 lines=(${(ps:\\n:)msg})
113 for line in $lines; do
114 echo -n "${fg_bold[blue]}[autoenv]${fg_no_bold[default]} " >&2
115 echo ${indent}${line} >&2
120 # Load zstat module, but only its builtin `zstat`.
121 zmodload -F zsh/stat b:zstat
124 # Generate hash pair for a given file ($1).
125 # A fixed hash value can be given as 2nd arg, but is used with tests only.
126 _autoenv_hash_pair() {
127 local env_file=${1:A}
128 local env_shasum=${2:-}
129 if [[ -z $env_shasum ]]; then
130 if ! [[ -e $env_file ]]; then
131 echo "Missing file argument for _autoenv_hash_pair!" >&2
134 env_shasum=$(shasum $env_file | cut -d' ' -f1)
136 echo ":${env_file}:${env_shasum}:1"
139 _autoenv_authorized_env_file() {
141 local pair=$(_autoenv_hash_pair $env_file)
142 test -f $AUTOENV_ENV_FILENAME \
143 && \grep -qF $pair $AUTOENV_ENV_FILENAME
146 _autoenv_authorize() {
147 local env_file=${1:A}
148 _autoenv_deauthorize $env_file
149 _autoenv_hash_pair $env_file >> $AUTOENV_ENV_FILENAME
152 # Deauthorize a given filename, by removing it from the auth file.
153 # This uses `test -s` to only handle non-empty files, and a subshell to
154 # allow for writing to the same file again.
155 _autoenv_deauthorize() {
156 local env_file=${1:A}
157 if [[ -s $AUTOENV_ENV_FILENAME ]]; then
158 echo "$(\grep -vF :${env_file}: $AUTOENV_ENV_FILENAME)" > $AUTOENV_ENV_FILENAME
162 # This function can be mocked in tests
163 _autoenv_ask_for_yes() {
166 if [[ $answer == "yes" ]]; then
173 # Args: 1: absolute path to env file (resolved symlinks).
174 _autoenv_check_authorized_env_file() {
175 if ! [[ -f $1 ]]; then
178 if ! _autoenv_authorized_env_file $1; then
179 echo "Attempting to load unauthorized env file!"
182 echo "**********************************************"
186 echo "**********************************************"
188 echo -n "Would you like to authorize it? (type 'yes') "
190 if ! _autoenv_ask_for_yes; then
194 _autoenv_authorize $1
199 # Get directory of this file (absolute, with resolved symlinks).
200 _autoenv_source_dir=${0:A:h}
205 local _autoenv_envfile_dir=${3:-${1:A:h}}
207 autoenv_from_dir=$_autoenv_chpwd_prev_dir
210 # Source varstash library once.
211 if [[ -z "$functions[(I)autostash]" ]]; then
212 source $_autoenv_source_dir/lib/varstash
213 # NOTE: Varstash uses $PWD as default for varstash_dir, we might set it to
217 # Change to directory of env file, source it and cd back.
219 builtin cd -q $_autoenv_envfile_dir
220 _autoenv_debug "== SOURCE: ${bold_color:-}$env_file${reset_color:-}\n PWD: $PWD"
221 (( _autoenv_debug_indent++ ))
223 (( _autoenv_debug_indent-- ))
224 _autoenv_debug "== END SOURCE =="
225 builtin cd -q $new_dir
227 # Unset vars set for enter/leave scripts.
228 # This should not get done for recursion (via autoenv_source_parent),
229 # and can be useful to have in general after autoenv was used.
230 # unset autoenv_event autoenv_from_dir autoenv_to_dir
233 _autoenv_get_file_upwards() {
234 local look_from=${1:-$PWD}
235 local look_for=${2:-$AUTOENV_FILE_ENTER}
237 # Manually look in parent dirs. An extended Zsh glob should use Y1 for
238 # performance reasons, which is only available in zsh-5.0.5-146-g9381bb6.
240 local parent_dir="$look_from/.."
242 parent_dir=${parent_dir:A}
243 if [[ $parent_dir == $last ]]; then
246 parent_file="${parent_dir}/${look_for}"
248 if [[ -f $parent_file ]]; then
254 parent_dir="${parent_dir}/.."
259 _autoenv_chpwd_prev_dir=$PWD
260 _autoenv_chpwd_handler() {
261 local env_file="$PWD/$AUTOENV_FILE_ENTER"
263 _autoenv_debug "Calling chpwd handler: PWD=$PWD"
265 # Handle leave event for previously sourced env files.
266 if [[ $AUTOENV_HANDLE_LEAVE == 1 ]] && (( $#_autoenv_stack_entered )); then
267 local prev_file prev_dir
268 for prev_file in ${_autoenv_stack_entered}; do
269 prev_dir=${prev_file:A:h}
270 if ! [[ ${PWD:A}/ == ${prev_dir}/* ]]; then
271 local env_file_leave=$prev_dir/$AUTOENV_FILE_LEAVE
272 if _autoenv_check_authorized_env_file $env_file_leave; then
273 _autoenv_source $env_file_leave leave $prev_dir
276 # Unstash any autostashed stuff.
277 varstash_dir=$prev_dir autounstash
279 _autoenv_stack_entered_remove $prev_file
284 if ! [[ -f $env_file ]] && [[ $AUTOENV_LOOK_UPWARDS == 1 ]]; then
285 env_file=$(_autoenv_get_file_upwards $PWD)
286 if [[ -z $env_file ]]; then
287 _autoenv_chpwd_prev_dir=$PWD
292 # Load the env file only once: check if $env_file is in the stack of entered
294 if _autoenv_stack_entered_contains $env_file; then
295 _autoenv_debug "Already in stack: $env_file"
296 _autoenv_chpwd_prev_dir=$PWD
300 if ! _autoenv_check_authorized_env_file $env_file; then
301 _autoenv_chpwd_prev_dir=$PWD
305 _autoenv_stack_entered_add $env_file
307 # Source the enter env file.
308 _autoenv_debug "Sourcing from chpwd handler: $env_file"
309 _autoenv_source $env_file enter
311 _autoenv_chpwd_prev_dir=$PWD
313 (( _autoenv_debug_indent++ ))
317 autoload -U add-zsh-hook
318 add-zsh-hook chpwd _autoenv_chpwd_handler
320 # Look in current directory already.
321 _autoenv_chpwd_handler