The installation instructions tell you to run "easy_install http://closure-linter.googlecode.com/files/closure_linter-la.... All well and good, but install instructions that don't reference specific version numbers freak me out. I might have gotten a little too much reproducibility religion, with all that that entails, but it seems better than being so cavalier when setting up environments.
I'm not sure what easy_install does exactly, but I guess you could replace latest with a version number. On http://code.google.com/p/closure-linter/downloads/ there's a 2.2.1 there, so instead of using "latest", you could use "2.2.1". If you care enough about this, then you probably could do some digging. Having a "latest" means they don't have to update the instructions every release, and for most people this will Just Work.
easy_install is yet another single-language package manager. It doesn't interop with the legitimate OS package manager's database of installed dependencies, and your admins probably have very little experience with it. Best to run it on one sacrificial box and then turn whatever it leaves behind into a real RPM package (or whatever your platform wants).
You can set things up so that easy_install installs into a special root. And you nearly always should.
The closest to an exception I can come up with is when you rely on image-based installs instead of package-by-package upgrades. And even then I can't manage to convince myself.
No exceptions at all for individual developers' machines.
