From 492ea04cc0fb7dc80d372d577c5c5f16115425ae Mon Sep 17 00:00:00 2001
From: Trevor Brown <admin@stratus3d.com>
Date: Wed, 15 Mar 2017 10:47:47 -0400
Subject: [PATCH] Add update command.

---
 lib/commands/update.sh | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 lib/commands/update.sh

diff --git a/lib/commands/update.sh b/lib/commands/update.sh
new file mode 100644
index 00000000..20f50b1c
--- /dev/null
+++ b/lib/commands/update.sh
@@ -0,0 +1,28 @@
+update_command() {
+  local update_to_head=$1
+
+  (
+  cd $(asdf_dir)
+  pwd
+
+  if [ "$update_to_head" = "--head" ]; then
+    # Update to latest on the master branch
+    git checkout master || exit 1
+
+    # Pull down the latest changes on master
+    git pull origin master || exit 1
+    echo "Updated asdf to latest on the master branch"
+  else
+    # Update to latest release
+    git fetch --tags || exit 1
+    tags=$(git tag)
+
+    # Pick the newest tag
+    tag=$()
+
+    # Update
+    git checkout "$tag" || exit 1
+    echo "Updated asdf to release $tag"
+  fi
+  )
+}