feat(def): Add def Plugin

plugins/def/def.plugin.zsh

@@ -0,0 +1,77 @@
+### A zsh plugin that executes a default command specified in the def.config file.
+def () {
+  if [ -z "$XDG_CONFIG_HOME" ]; then
+    export XDG_CONFIG_HOME="$HOME/.config"
+  fi
+  local dir="$(pwd)"
+
+  if [ "$1" = "init" ]; then
+    ### If there's no def.config file, then we create one.
+    if [ ! -f "$XDG_CONFIG_HOME/def/def.config" ]; then
+      mkdir -p "$XDG_CONFIG_HOME"/def
+      touch "$XDG_CONFIG_HOME/def"/def.config
+      echo "A def.config file was created in $XDG_CONFIG_HOME/def."
+      return
+    fi
+    echo "A 'def.config' file already exists in $XDG_CONFIG_HOME."
+    return
+  fi
+
+  if [  "$1" = "add" ]; then
+    if [ ! -f "$XDG_CONFIG_HOME/def/def.config" ]; then
+      echo "No default config file found. Create one in with the 'def init' command."
+      return
+    fi
+    echo "$dir ${@:2}" >> "$XDG_CONFIG_HOME/def/def.config"
+    echo "Added '${@:2}' to the default config file."
+    return
+  fi
+
+  if [ "$1" = "remove" ]; then
+    if [ ! -f "$XDG_CONFIG_HOME/def/def.config" ]; then
+      echo "No default config file found. Create one in with the 'def init' command"
+      return
+    fi
+    if [ -f $dir/.def ]; then
+      rm $dir/.def
+      echo "Removed local .def file"
+    fi
+    while read line; do
+      if [[ $line =~ ^$dir ]]; then
+        sed -i "\%$line%d" "$XDG_CONFIG_HOME/def/def.config"
+        echo "Removed '$line' from the default config file."
+      fi
+    done < "$XDG_CONFIG_HOME/def/def.config"
+    return
+  fi
+
+  if [ -z "$1" ]; then
+    if [ -f $dir/.def ] && [ "$dir" != "$XDG_CONFIG_HOME" ]; then
+        . $dir/.def
+    else
+      if [ -f $XDG_CONFIG_HOME/def/def.config ]; then
+        while read line; do
+          if [ "$line" != "" ]; then
+            local directory=$(echo $line | cut -d' ' -f1)
+            local command=$(echo $line | cut -d' ' -f2-)
+
+            if [[ $directory == *"~"* ]]; then
+              directory=$(echo $directory | sed 's%~%'$HOME'%g')
+            fi
+
+            if [[ $dir =~ $directory ]]; then
+              echo $(eval $command)
+              return
+            fi
+          fi
+        done < $XDG_CONFIG_HOME/def/def.config
+        echo "No default command found for the current directory"
+      else
+        echo "No default config file found. Create one in with the 'def init' command dmdmd."
+      fi
+    fi
+  else 
+    echo "Unknown command '$1'"
+  fi
+}
+