Scripts to backup and restore settings modified by .osx

.gitignore

@@ -8,4 +8,7 @@ Thumbs.db
 
 # Files that might appear on external disks
 .Spotlight-V100
-.Trashes
+.Trashes
+
+# OSX system settings backup file
+.osx_settings_backup

osx_backup.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+function process () {
+  # Create a backup file if one doesn't exists
+  if [[ ! -e '.osx_settings_backup' ]]; then
+    echo "Backup Settings" > .osx_settings_backup
+  else
+    # If a backup already exists, the script exits to prevent
+    # the backup being overwrittern with the modified values
+    echo "Backup already created. Cancelling operation..."
+    exit
+  fi
+
+  echo "Creating backup..."
+
+  # extract the settings being modified by .osx
+  settings=`egrep "^defaults (-currentHost )?write [[:alnum:][:punct:]]+ [[:alnum:][:punct:]]+ (-array |-bool |-int |-string |-dict-add |-array-add )?.*" .osx | sed "s/write/read/" | sed "s/\(defaults\)\(.*\)\(read [a-zA-Z[:punct:] ]*\) -.*/\1\2\3/"`
+
+  # Bash workaround to enable iteration over array values that have whitespace
+  oldifs=$IFS
+  IFS=$(echo -en "\n\b")
+
+  # Iterate over the OSX settings array - storing the current value in .osx_settings_backup
+  for s in ${settings[*]}; do
+    t=`eval "$s 2>/dev/null"`
+
+    # replace the action with a placeholder
+    # to easily swap it out during settings restore
+    c=`echo $s | sed "s/ read / :action: /"`
+    if [[ $t ]]; then
+      echo $c ":" $t >> .osx_settings_backup
+    else
+      echo $c ": default" >> .osx_settings_backup
+    fi
+  done
+  IFS=$oldifs
+
+  # Backup Launchpad DB
+  for file in ~/Library/Application\ Support/Dock/*.db; do
+    cp "$file" "$file.bak";
+  done
+
+  echo "Settings backed up to .osx_settings_backup"
+}
+
+process
+
+exit

osx_restore.sh

@@ -0,0 +1,75 @@
+#!/bin/bash
+
+function restore () {
+  # Check that there are backup settings to restore from
+  if [[ ! -e ".osx_settings_backup" ]]; then
+    echo "Cannot find backup. Exiting..."
+    exit
+  fi
+
+  echo "Restoring backup..."
+
+  # extract the backup settings from .osx_settings_backup
+  settings=`egrep "^defaults (-currentHost )?:action: [[:alnum:][:punct:]]+ [[:alnum:][:punct:]]+" .osx_settings_backup`
+
+  # Bash workaround to enable iteration over array values that have whitespace
+  oldifs=$IFS
+  IFS=$(echo -en "\n\b")
+
+  # Iterate over the OSX settings array - storing the current value in .osx_settings_backup
+  for s in ${settings[*]}; do
+
+    # get the value
+    value=`echo $s | sed "s/.* : //"`
+
+    # get the command
+    com=`echo $s | sed "s/ : .*//"`
+
+    # if the backed up setting is 'default', the modified setting is removed which
+    # causes OSX to revert to the default settings
+    if [[ $value = 'default' ]]; then
+      com=`echo $com | sed "s/ :action: / delete /"`
+      eval "$com"
+    else
+      com=`echo $com | sed "s/ :action: / write /"`
+      eval "$com '$value'"
+    fi
+    unset value
+  done
+  IFS=$oldifs
+  unset oldifs
+
+  # Don't show item info below desktop icons
+  /usr/libexec/PlistBuddy -c "Set :DesktopViewSettings:IconViewSettings:showItemInfo false" ~/Library/Preferences/com.apple.finder.plist
+
+  # Disable snap-to-grid for desktop icons
+  /usr/libexec/PlistBuddy -c "Set :DesktopViewSettings:IconViewSettings:arrangeBy kind" ~/Library/Preferences/com.apple.finder.plist
+
+  # Hide the ~/Library folder
+  chflags hidden ~/Library
+
+  # Enable local Time Machine backups
+  echo "Enabling Time Machine... (may require password or ctrl + c to skip)"
+  sudo tmutil enablelocal
+
+  # Restore Dropbox’s green checkmark icons in Finder
+  file=/Applications/Dropbox.app/Contents/Resources/check.icns
+  [ -e "$file.bak" ] && mv -f "$file.bak" "$file" $$ rm -f "$file.bak"
+  unset file
+
+  # Backup Launchpad DB
+  for file in ~/Library/Application\ Support/Dock/*.db.bak; do
+    # copy the backup andremove .bak
+    cp "$file" "${file//.bak/}"
+    rm -f "$file"
+  done
+
+  # Kill affected applications
+  for app in Finder Dock Mail Safari iTunes iCal Address\ Book SystemUIServer; do killall "$app" > /dev/null 2>&1; done
+
+  echo "Backup restored."
+}
+
+restore
+
+exit