feat(setup): update setup script to create backups

backups are now created before a file is symlinked

Closes closes #2 closes #3

.gitignore

@@ -1 +1,3 @@
 *.local
+~backup/
+*~

setup.sh

@@ -1,26 +1,55 @@
 #!/bin/bash
 
-# 1. Backup current dot files
-# Going to have to save path to a variable
-# mkdir .dotfile/backup/YYYY/mm-dd h:i:s/
-# @Todo add /backup dir to git ignore
-# cp .* to the above dir
-
-
-
-# 2. Make symlinks
+# set date so we have a consistent path to move copies of backup files to
+DATE=$(date +%Y-%m-%d"_"%H:%M:%S)
 
 link() {
     if [ ! -h $HOME/.$1 ]; then
        ln -s "$HOME/.dotfiles/$1" "$HOME/.$1"
     fi
 }
 
+backup() {
+    if [ ! $2 ]; then
+        printf " !! No date passed - Backup could not be created\n"
+        return
+    else
+        if [ ! -h $HOME/.$1 ]; then
+            mkdir -p "$HOME/.dotfiles/~backup/$2/"
+            mv "$HOME/.$1" "$HOME/.dotfiles/~backup/$2/.$1"
+        fi
+    fi
+}
+
+restore() {
+    if [ ! $2 ]; then
+        printf " !! No date passed - Restore could not occur\n"
+        return
+    else
+        if [ ! -h $HOME/.dotfiles/~backup/$2/.$1 ]; then
+            mv "$HOME/.dotfiles/~backup/$2/.$1" "$HOME/.$1"
+        fi
+    fi
+}
+
+# make sure local config files exist
 touch ~/.dotfiles/gitconfig.local
 touch ~/.dotfiles/profile.local
 
+# backup and link the git config
+backup "gitconfig" $DATE
 link "gitconfig"
+
+# backup and link profile information
+backup "profile" $DATE
+backup "bash_profile" $DATE
 link "profile"
 
+# reset the terminal with the latest profile settings
 source ~/.profile
 printf '=> Bash profile reset.\n'
+
+# backup and restore debugging
+#backup "hgignore_global" $DATE
+#REVERT="2017-07-31_16:27:45"
+#restore "hgignore_global" $REVERT