add update-codebase.sh to automatically update build outputs

.gitignore

@@ -61,3 +61,5 @@ build/
 _ignore/
 
 package.json.lock
+
+!js/build/

index.html

@@ -57,7 +57,7 @@
 	</p>
 
 	<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/three.js/89/three.min.js"></script>
-	<script type="text/javascript" src="js/skinview3d.min.js"></script>
+	<script type="text/javascript" src="js/build/skinview3d.min.js"></script>
 	<script type="text/javascript" src="js/example.js"></script>
 	<script>
 		initSkinViewer();

update-codebase.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+set -e
+if [ ! -d ".git" ];then
+	echo "Please run this command in the root directory of the repository."
+	exit 1
+fi
+
+checkout_dir="_ignore/master"
+output_dir="js/build"
+revision_file="$output_dir/revision"
+
+if [ -f "$revision_file" ];then
+	last_revision=$(cat $revision_file)
+	echo "> Current revison of build outputs: $last_revision"
+fi
+
+original_dir=$(pwd)
+master_revision=$(git show-ref --hash -- refs/heads/master)
+
+echo "> Checking out $master_revision"
+echo "> Commit summary:"
+git show --summary $master_revision
+rm -rf -- $checkout_dir
+mkdir -p -- $checkout_dir
+git --work-tree=$checkout_dir checkout $master_revision -- .
+cd -- $checkout_dir
+
+echo "> Building"
+npm install
+
+echo "> Copying build outputs"
+cd -- $original_dir
+rm -rf -- $output_dir
+cp -r -- "$checkout_dir/build" $output_dir
+echo "$master_revision" > $revision_file
+echo "> New revison of build outputs: $master_revision"