I have some .groovy files on my file system. I would like to be able to preview them in Finder as I navigate around them. How do I do this?
QLStephen displays files with no extension or with arbitrary extensions as plain text. You can install it by moving the qlgenerator bundle to
~/Library/QuickLook/ and running
If it doesn't display some file types, try adding their UTIs to
CFBundleDocumentTypes:LSContentTypes in the Info.plist.
If Finder does not automatically show a preview of a file when using QuickLook (default shortcut key is Space when file is selected), then the QuickLook extension does not support these files.
Unless you're a hard-core Mac/Unix developer, you won't be able to add this capability yourself. Never fear, however; this is the Internet, after all, and odds are that someone's already developed the plugin for this. A good place to look is the QuickLook Plugins site.
Wherever you get your plugins, installation is very simple. Drag the plugin file (it will look something like a little white Lego brick) to the
/Library/QuickLook/ folder, log out, and log back in again. If everything is working properly, you should be able to press Space with your
.groovy file selected and see the QuickLook window appear with a preview.
Notes: You will probably need an admin username/password to modify the
/Library/QuickLook/ folder. Also, if QuickLook still doesn't show a preview after logging back in, try restarting your computer.