Add autoenv command to manage autoenv's

usage: autoenv [-h] {init,edit,deinit}

options:
        -h, --help  show this help message and exit

commands:
        init        add .enter and .exit scripts in current directory
        edit        edit .enter and .exit scripts in current directory
        deinit      remove .enter and .exit scripts in current directory

autoenv/_autoenv

@@ -1,5 +1,6 @@
 #compdef autoenv
 
+# Completion for the autoenv command.
 _autoenv() {
   local ret=1 context curcontext="$curcontext" state line
   typeset -A opt_args

autoenv/autoenv.zsh

@@ -5,38 +5,11 @@
 # The secret sauce can be found at the bottom of this file, where the `chpwd`
 # hook function `_autoenv_chpwd` is added.
 
+# The autoenv command provides a convenient way to create, edit, and remove
+# enter and exit scripts in the current directory.
 autoenv() {
   local cmd=$1
   case "$cmd" in
-    init)       # Create enter and exit scripts in current directory.
-      if [ -f $PWD/.enter ] || [ -f $PWD/.exit ]; then
-        echo '.enter or .exit already exists'; return 1
-      fi
-      touch .enter .exit
-      autoenv edit ;;
-    edit)       # Edit enter and exit scripts in current directory.
-      if ! [ -f $PWD/.enter ] || ! [ -f $PWD/.exit ]; then
-        echo '.enter or .exit not found'; return 1
-      fi
-      if which vim &> /dev/null; then
-        vim -P .enter .exit
-      else
-        echo 'vim not found'; return 1
-      fi ;;
-    deinit)     # Remove enter and exit scripts in current directory.
-      if [ -f $PWD/.enter ] || [ -f $PWD/.exit ]; then
-        while true; do
-          read "answer?Are you sure [y/N]? "
-          case "$answer" in
-            y|Y|yes)
-              [ -f $PWD/.enter ] && rm $PWD/.enter
-              [ -f $PWD/.exit ] && rm $PWD/.exit ;;
-            *) break ;;
-          esac
-        done
-      else
-        echo '.enter and .exit not found'; return 1
-      fi ;;
     -h|--help)  # Display help.
       echo "\
 usage: autoenv [-h] {init,edit,deinit}
@@ -47,17 +20,72 @@ options:
 commands:
         init        add .enter and .exit scripts in current directory
         edit        edit .enter and .exit scripts in current directory
-        deinit      remove .enter and .exit scripts in current directory
-";;
-    *)          # Invalid arguments.
+        deinit      remove .enter and .exit scripts in current directory"
+        ;;
+
+    init)  # Create enter and exit scripts in current directory.
+      if [ -f $PWD/.enter ] || [ -f $PWD/.exit ]; then
+        echo '.enter or .exit already exists'; return 1
+      fi
+      # Create then edit enter and exit scripts.
+      touch .enter .exit && autoenv edit
+      # Load the authorized file into a map of authorized key value pairs.
+      typeset -A authorized=(`cat ~/.cache/autoenv/authorized`)
+      # If enter script exists, authorize it.
+      [ -f $PWD/.enter ] && \
+        authorized[$PWD/.enter]=`zstat +mtime $PWD/.enter`
+      # If exit script exists, authorize it.
+      [ -f $PWD/.exit ] && \
+        authorized[$PWD/.exit]=`zstat +mtime $PWD/.exit`
+      # Store authorized map in authorized file.
+      echo ${(kv)authorized} > ~/.cache/autoenv/authorized
+      # Enter the new autoenv.
+      _autoenv_enter $PWD
+      ;;
+
+    edit)  # Edit enter and exit scripts in current directory.
+      if ! [ -f $PWD/.enter ] || ! [ -f $PWD/.exit ]; then
+        echo '.enter or .exit not found'; return 1
+      fi
+      # If vim exists, edit enter and exit scripts.
+      if which vim &> /dev/null; then
+        vim -p .enter .exit
+      else
+        echo 'vim not found'; return 1
+      fi ;;
+
+    deinit)  # Remove enter and exit scripts in current directory.
+      if [ -f $PWD/.enter ] || [ -f $PWD/.exit ]; then
+        # Prompt user to confirm removal of enter and exit scripts.
+        while true; do
+          read "answer?Are you sure [y/N]? "
+          case "$answer" in
+            y|Y|yes)
+              # Remove enter and exit scripts.
+              [ -f $PWD/.enter ] && rm $PWD/.enter
+              [ -f $PWD/.exit ] && rm $PWD/.exit
+              ;;
+            *) break ;;
+          esac
+        done
+      else
+        echo '.enter and .exit not found'; return 1
+      fi ;;
+
+    *)  # Invalid arguments, show help then error.
       echo "invalid arguments: $@"
       autoenv --help
       return 1 ;;
+
   esac
 }
 
 # Global entered directories array.
 _autoenv_entered=()
+# If autoenv cache directory does not exist, create it.
+! [ -d ~/.cache/autoenv ] && mkdir -p ~/.cache/autoenv
+# If the authorized file does not exist, create it.
+! [ -f ~/.cache/autoenv/authorized ] && touch ~/.cache/autoenv/authorized
 
 # Check if the given file is authorized, if not prompt the user to authorize,
 # ignore, or view the file. Authorized files and their modified times are
@@ -65,14 +93,8 @@ _autoenv_entered=()
 # persistent.
 _autoenv_authorized() {
   local file=$1
-  # If autoenv cache directory does not exist, create it.
-  local cache_dir=~/.cache/autoenv
-  ! [ -d $cache_dir ] && mkdir -p $cache_dir
-  local authorized_file=$cache_dir/authorized
-  # Define a map to hold authorized key value pairs.
-  typeset -A authorized=()
-  # If the authorized file exists, load it into the map.
-  [ -f $authorized_file ] && typeset -A authorized=(`cat $authorized_file`)
+  # Load the authorized file into a map of authorized key value pairs.
+  typeset -A authorized=(`cat ~/.cache/autoenv/authorized`)
   # If the given file has been authorized, i.e. the modified time matches that
   # held in the authorized file, return.
   local modified_time=`zstat +mtime $file`
@@ -87,7 +109,7 @@ _autoenv_authorized() {
       v|V|view) cat $file ;;  # View the file.
     esac
   done
-  # Store authorized associative array in authorized file.
+  # Store authorized map in authorized file.
   echo ${(kv)authorized} > $authorized_file
 }