wd.plugin: Added checks, readme and completion

plugins/wd/README.md

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+## wd
+
+**Maintainer:** [mfaerevaag](https://github.com/mfaerevaag)
+
+`wd` (warp directory) lets you jump to custom directories in zsh, without using cd. Why? Because cd seems ineffecient when the folder is frequently visited or has a long path. [Source](https://github.com/mfaerevaag/wd)
+
+### Usage
+
+ * Add warp point to current working directory:
+
+        wd add test
+
+    If a warp point with the same name exists, use `add!` to overwrite it.
+
+ * From an other directory, warp to test with:
+
+        wd test
+
+ * You can warp back to previous directory, and so on, with the puncticulation syntax:
+
+        wd ..
+        wd ...
+
+    This is a wrapper for the zsh `dirs` function.
+
+ * Remove warp point test point:
+
+        wd rm test
+
+ * List warp points to current directory (stored in `~/.warprc`):
+
+        wd show
+
+ * List all warp points (stored in `~/.warprc`):
+
+        wd ls
+
+ * Print usage with no opts or the `help` argument.

plugins/wd/_wd.sh

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+#compdef wd.sh
+
+zstyle ":completion:*:descriptions" format "%B%d%b"
+
+CONFIG=$HOME/.warprc
+
+local -a main_commands
+main_commands=(
+    add:'Adds the current working directory to your warp points'
+    #add'\!':'Overwrites existing warp point' # TODO: Fix
+    rm:'Removes the given warp point'
+    ls:'Outputs all stored warp points'
+    show:'Outputs warp points to current directory'
+)
+
+local -a points
+while read line
+do
+    points+=$(awk "{ gsub(/\/Users\/$USER|\/home\/$USER/,\"~\"); print }" <<< $line)
+done < $CONFIG
+
+_wd()
+{
+    # init variables
+    local curcontext="$curcontext" state line
+    typeset -A opt_args
+
+    # init state
+    _arguments \
+        '1: :->command' \
+        '2: :->argument'
+
+    case $state in
+        command)
+            compadd "$@" add rm ls show
+            _describe -t warp-points 'Warp points:' points && ret=0
+            ;;
+        argument)
+            case $words[2] in
+                rm|add!)
+                    _describe -t warp-points 'warp points' points && ret=0
+                    ;;
+                *)
+            esac
+    esac
+}
+
+_wd "$@"