2 # https://github.com/joshuaclayton/dotfiles/blob/master/zsh_profile.d/autoenv.zsh
4 export AUTOENV_ENV_FILENAME=$HOME/.env_auth
5 [ -e $AUTOENV_ENV_FILENAME ] || touch $AUTOENV_ENV_FILENAME
7 # Name of file to look for when entering directories.
8 : ${AUTOENV_FILE_ENTER:=.env}
10 # Name of file to look for when leaving directories.
11 # Requires AUTOENV_HANDLE_LEAVE=1.
12 : ${AUTOENV_FILE_LEAVE:=.env.leave}
14 # Look for .env in parent dirs?
15 : ${AUTOENV_LOOK_UPWARDS:=1}
17 # Handle leave events when changing away from a subtree, where an "enter"
19 : ${AUTOENV_HANDLE_LEAVE:=1}
21 # Enable debugging. Multiple levels are supported (max 2).
24 # Public helper functions, which can be used from your .env files:
26 # Source the next .env file from parent directories.
27 # This is useful if you want to use a base .env file for a directory subtree.
28 autoenv_source_parent() {
29 local parent_env_file=$(_autoenv_get_file_upwards $PWD)
31 if [[ -n $parent_env_file ]] \
32 && _autoenv_check_authorized_env_file $parent_env_file; then
33 _autoenv_debug "Calling autoenv_source_parent: parent_env_file:$parent_env_file"
35 local parent_env_dir=${parent_env_file:A:h}
37 _autoenv_stack_entered_add $parent_env_file
39 _autoenv_source $parent_env_file enter $parent_env_dir
43 # Internal functions. {{{
44 # Internal: stack of entered (and handled) directories. {{{
45 typeset -g -a _autoenv_stack_entered
46 _autoenv_stack_entered=()
47 # -g: make it global, this is required when used with antigen.
48 typeset -g -A _autoenv_stack_entered_mtime
49 _autoenv_stack_entered_mtime=()
51 # Add an entry to the stack, and remember its mtime.
52 _autoenv_stack_entered_add() {
55 # Remove any existing entry.
56 _autoenv_stack_entered_remove $env_file
58 _autoenv_debug "[stack] adding: $env_file" 2
60 # Append it to the stack, and remember its mtime.
61 _autoenv_stack_entered+=($env_file)
62 _autoenv_stack_entered_mtime[$env_file]=$(_autoenv_get_file_mtime $env_file)
65 _autoenv_get_file_mtime() {
73 # Remove an entry from the stack.
74 _autoenv_stack_entered_remove() {
76 _autoenv_debug "[stack] removing: $env_file" 2
77 _autoenv_stack_entered[$_autoenv_stack_entered[(i)$env_file]]=()
78 _autoenv_stack_entered_mtime[$env_file]=
81 # Is the given entry already in the stack?
82 _autoenv_stack_entered_contains() {
84 if (( ${+_autoenv_stack_entered[(r)${env_file}]} )); then
86 if [[ $_autoenv_stack_entered_mtime[$env_file] == $(_autoenv_get_file_mtime $env_file) ]]; then
87 # Entry has the expected mtime.
95 # Internal function for debug output. {{{
99 if [[ $AUTOENV_DEBUG -lt $level ]]; then
102 # Load zsh color support.
103 if [[ -z $color ]]; then
107 # Build $indent prefix.
109 if [[ $_autoenv_debug_indent -gt 0 ]]; then
110 for i in {1..${_autoenv_debug_indent}}; do
115 # Split $msg by \n (not newline).
116 lines=(${(ps:\\n:)msg})
117 for line in $lines; do
118 echo -n "${fg_bold[blue]}[autoenv]${fg_no_bold[default]} " >&2
119 echo ${indent}${line} >&2
124 # Load zstat module, but only its builtin `zstat`.
125 zmodload -F zsh/stat b:zstat
128 # Generate hash pair for a given file ($1).
129 # A fixed hash value can be given as 2nd arg, but is used with tests only.
130 _autoenv_hash_pair() {
131 local env_file=${1:A}
132 local env_shasum=${2:-}
133 if [[ -z $env_shasum ]]; then
134 if ! [[ -e $env_file ]]; then
135 echo "Missing file argument for _autoenv_hash_pair!" >&2
138 env_shasum=$(shasum $env_file | cut -d' ' -f1)
140 echo ":${env_file}:${env_shasum}:1"
143 _autoenv_authorized_env_file() {
145 local pair=$(_autoenv_hash_pair $env_file)
146 test -f $AUTOENV_ENV_FILENAME \
147 && \grep -qF $pair $AUTOENV_ENV_FILENAME
150 _autoenv_authorize() {
151 local env_file=${1:A}
152 _autoenv_deauthorize $env_file
153 _autoenv_hash_pair $env_file >>| $AUTOENV_ENV_FILENAME
156 # Deauthorize a given filename, by removing it from the auth file.
157 # This uses `test -s` to only handle non-empty files, and a subshell to
158 # allow for writing to the same file again.
159 _autoenv_deauthorize() {
160 local env_file=${1:A}
161 if [[ -s $AUTOENV_ENV_FILENAME ]]; then
162 echo "$(\grep -vF :${env_file}: $AUTOENV_ENV_FILENAME)" >| $AUTOENV_ENV_FILENAME
166 # This function can be mocked in tests
167 _autoenv_ask_for_yes() {
170 if [[ $answer == "yes" ]]; then
177 # Args: 1: absolute path to env file (resolved symlinks).
178 _autoenv_check_authorized_env_file() {
179 if ! [[ -f $1 ]]; then
182 if ! _autoenv_authorized_env_file $1; then
183 echo "Attempting to load unauthorized env file!"
186 echo "**********************************************"
190 echo "**********************************************"
192 echo -n "Would you like to authorize it? (type 'yes') "
194 if ! _autoenv_ask_for_yes; then
198 _autoenv_authorize $1
203 # Get directory of this file (absolute, with resolved symlinks).
204 _autoenv_source_dir=${0:A:h}
209 local _autoenv_envfile_dir=${3:-${1:A:h}}
211 autoenv_from_dir=$_autoenv_chpwd_prev_dir
214 # Source varstash library once.
215 if [[ -z "$functions[(I)autostash]" ]]; then
216 source $_autoenv_source_dir/lib/varstash
217 # NOTE: Varstash uses $PWD as default for varstash_dir, we might set it to
221 # Change to directory of env file, source it and cd back.
223 builtin cd -q $_autoenv_envfile_dir
224 _autoenv_debug "== SOURCE: ${bold_color:-}$env_file${reset_color:-}\n PWD: $PWD"
225 (( _autoenv_debug_indent++ ))
227 (( _autoenv_debug_indent-- ))
228 _autoenv_debug "== END SOURCE =="
229 builtin cd -q $new_dir
231 # Unset vars set for enter/leave scripts.
232 # This should not get done for recursion (via autoenv_source_parent),
233 # and can be useful to have in general after autoenv was used.
234 # unset autoenv_event autoenv_from_dir autoenv_to_dir
237 _autoenv_get_file_upwards() {
238 local look_from=${1:-$PWD}
239 local look_for=${2:-$AUTOENV_FILE_ENTER}
241 # Manually look in parent dirs. An extended Zsh glob should use Y1 for
242 # performance reasons, which is only available in zsh-5.0.5-146-g9381bb6.
244 local parent_dir="$look_from/.."
246 parent_dir=${parent_dir:A}
247 if [[ $parent_dir == $last ]]; then
250 parent_file="${parent_dir}/${look_for}"
252 if [[ -f $parent_file ]]; then
258 parent_dir="${parent_dir}/.."
263 _autoenv_chpwd_prev_dir=$PWD
264 _autoenv_chpwd_handler() {
265 local env_file="$PWD/$AUTOENV_FILE_ENTER"
267 _autoenv_debug "Calling chpwd handler: PWD=$PWD"
269 # Handle leave event for previously sourced env files.
270 if [[ $AUTOENV_HANDLE_LEAVE == 1 ]] && (( $#_autoenv_stack_entered )); then
271 local prev_file prev_dir
272 for prev_file in ${_autoenv_stack_entered}; do
273 prev_dir=${prev_file:A:h}
274 if ! [[ ${PWD:A}/ == ${prev_dir}/* ]]; then
275 local env_file_leave=$prev_dir/$AUTOENV_FILE_LEAVE
276 if _autoenv_check_authorized_env_file $env_file_leave; then
277 _autoenv_source $env_file_leave leave $prev_dir
280 # Unstash any autostashed stuff.
281 varstash_dir=$prev_dir autounstash
283 _autoenv_stack_entered_remove $prev_file
288 if ! [[ -f $env_file ]] && [[ $AUTOENV_LOOK_UPWARDS == 1 ]]; then
289 env_file=$(_autoenv_get_file_upwards $PWD)
290 if [[ -z $env_file ]]; then
291 _autoenv_chpwd_prev_dir=$PWD
296 # Load the env file only once: check if $env_file is in the stack of entered
298 if _autoenv_stack_entered_contains $env_file; then
299 _autoenv_debug "Already in stack: $env_file"
300 _autoenv_chpwd_prev_dir=$PWD
304 if ! _autoenv_check_authorized_env_file $env_file; then
305 _autoenv_chpwd_prev_dir=$PWD
309 _autoenv_stack_entered_add $env_file
311 # Source the enter env file.
312 _autoenv_debug "Sourcing from chpwd handler: $env_file"
313 _autoenv_source $env_file enter
315 _autoenv_chpwd_prev_dir=$PWD
317 (( _autoenv_debug_indent++ ))
321 autoload -U add-zsh-hook
322 add-zsh-hook chpwd _autoenv_chpwd_handler
324 # Look in current directory already.
325 _autoenv_chpwd_handler