Added library to let users easily manage zsh shortcuts.

lib/shortcuts.zsh

@@ -0,0 +1,106 @@
+#!/bin/zsh
+
+# Manage zsh shortcuts simply and easily via the 'shortcut' command
+# 
+# Shortcuts are added via the 'shortcut' command to which is optionally
+# supplied a shortcut name and a target directory.
+# 
+# - If the directory is omitted then the current directory is assumed.
+# - If the shortcut name is omitted then the name of the current directory
+#     is used for the shortcut.
+# - If a shortcut already exists for the given shortcut name then it will
+#     overwrite the current entry.
+# 
+# Shortcuts get stored in a shortcuts file that is automatically sourced
+# each time an entry is added or a shell is started. By default this is in
+# the custom directory.
+#
+#
+# Examples:
+# 
+# Create a shortcut to the ZSH dir accessible by typing 'oh'. 
+# ~> shortcut oh ~/.oh-my-sh 
+# Adds and entry oh='/home/sgargan/.oh-my-sh' in the shortcuts file
+#
+# Create a shortcut 'prj' to the current directory. 
+# > cd ~/projects
+# > shortcut prj
+# Adds and entry prj='/home/sgargan/projects' in the shortcuts file
+#
+# Create a shortcut to the current dir using the name of the current dir e.g.
+# > cd ~/projects
+# > shortcut
+# Adds and entry projects='/home/sgargan/projects' in the shortcuts file
+#
+# Shortcuts can be deleted using the delete_shortcut command and passing it 
+# the name of the shortcut to delete.
+
+# this will get created the first time a shortcut is created.
+shortcuts_file=$ZSH/custom/shortcuts/shortcuts
+
+function source_shortcuts () {
+    if [[ -e $shortcuts_file ]]; then
+        source $shortcuts_file
+    fi
+}
+
+function create_shortcuts_file () {
+
+    if [[ ! -e $shortcuts_file ]]; then
+        local shortcuts_dir=`dirname $shortcuts_file`
+        mkdir -p $shortcuts_dir
+        touch $shortcuts_file
+    fi
+}
+
+function _delete () {
+    local contains=`grep "$1=" $shortcuts_file`
+    if [[ -n $contains ]]; then
+        sed -i "/$1=/d" $shortcuts_file
+    fi
+}
+
+function delete_shortcut () {
+
+    create_shortcuts_file     
+    local shortcut=$1
+    
+    if [[ -z $shortcut ]]; then
+        shortcut=`basename $dir`
+    fi
+    
+    echo "Deleting shortcut '$shortcut'"
+
+    _delete $shortcut
+    source_shortcuts
+}
+   
+function shortcut () {
+
+    create_shortcuts_file 
+    
+    local shortcut=$1
+    local dir=$2
+    
+    if [[ -z $dir ]]; then
+        dir=`pwd`
+    fi
+
+    if [[ -z $shortcut ]]; then
+        shortcut=`basename $dir`
+    fi
+    
+    echo "Creating shortcut '$shortcut' to access '$dir'"
+    local entry="$shortcut='$dir'"
+
+    _delete $shortcut
+    echo $entry >> $shortcuts_file
+    cat $shortcuts_file | sort | uniq > /tmp/shortcuts
+    mv /tmp/shortcuts $shortcuts_file
+
+    source_shortcuts
+}
+
+source_shortcuts
+
+