fixes #3547

Speed up AAT compilation by only compiling when necessary and allowing javascript compilation caches to live for longer.

New

• Added grunt server-diff:dev which will only compile less, handlebars and javascript if those files are newer than their output and will only copy most files if they are also newer than their output
• Allow the age of the javascript compilation cache to be changed from the command line using a millisecond integer at grunt server-diff:dev --cacheage=1000000000000

Fixes

• Expanded newer configuration in javascript config to improve glob accuracy and increase speed
• Allowed schema and data load caching for schema-defaults task to increase processing speed
• Allowed the diff tasks to force build when switching from production to development and back
• Improved grunt diff along the same lines as grunt server-diff

Notes

• The copy task is split so that the replace task always has a fresh @@ directives to string replace
  

  adapt_framework/grunt/tasks/server-diff.js

  Lines 11 to 18 in 5834023

  	'newer:copy:courseAssets',
  	'newer:copy:componentAssets',
  	'newer:copy:coreFonts',
  	'newer:copy:themeAssets',
  	'newer:copy:themeFonts',
  	'newer:copy:coreLibraries',
  	'newer:copy:libraries',
  	'copy:required',

• The javascript caching seems stable enough to extend the life of the files beyond one week, this is now configurable at the terminal only. Each cached file can be 2.5mb+ in size, there is one per course and they will live on the system for the defined length of time.

Testing

1. Setup

git clone https://github.com/adaptlearning/adapt_framework/ 3547-diff
cd 3547-diff
git checkout issue/3547
adapt devinstall && npm install
mkdir build/
cp -r src/course/ build/course/
grunt server-diff:dev --cacheage=2419200000

2. Rediff no changes

grunt server-diff:dev --cacheage=2419200000

3. Rediff with changes

grunt server-diff:dev --cacheage=2419200000

4. Switch from development to production

grunt server-diff:build --cacheage=2419200000

Caveats

• A full rebuild grunt server-build is required for:
  • Files copied into the build output from plugins that are subsequently removed will not be cleared up
  • Files copied in by spoor at scorm 1.2 will not be cleared when switching to scorm 2004