auto update

auto-update.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+# adapted from: https://github.com/jez/dotfiles/blob/master/util/auto-update.sh	
+
+# Number of seconds to wait before printing a reminder
+UPDATE_THRESHOLD="604800" # 1 week
+
+check_for_updates() {
+  [ ! -e $HOME/.dotfiles_update ] && touch $HOME/.dotfiles_update
+  # Initialize for when we have no GNU date available
+  last_check=0
+  time_now=0
+
+  # Darwin uses BSD, check for gdate, else use date
+  if [[ $(uname) = "Darwin" && -n $(which gdate) ]]; then
+    last_login=$(gdate -r ~/.dotfiles_update +%s)
+    time_now=$(gdate +%s)
+  else
+    # Ensure this is GNU grep
+    if [ -n "$(date --version 2> /dev/null | grep GNU)" ]; then
+      last_login=$(date -r ~/.dotfiles_update +%s)
+      time_now=$(date +%s)
+    fi
+  fi
+
+  time_since_check=$((time_now - last_login))
+
+  if [ "$time_since_check" -ge "$UPDATE_THRESHOLD" ]; then
+    echo $time_since_check
+  else
+    echo 0
+  fi
+}
+
+update() {
+  # Record that we've update
+  touch $HOME/.dotfiles_update
+
+  # Update dotfiles repo
+  cd ~/.dotfiles/
+
+  echo "Checking for updates..."
+  git fetch --quiet origin
+  if [ "$(git rev-parse HEAD)" != "$(git rev-parse origin/master)" ]; then
+    echo "--> outdated."
+    git pull
+    ./install.sh
+  else
+    echo "--> nothing to do."
+  fi
+
+  cd - &> /dev/null
+}
+
+check=$(check_for_updates)
+if [[ $check -gt 0 ]]; then
+    echo "Dotfiles might be out of date."
+    update
+fi
+