This prevents a Git hook from issuing a non-zero exit status if the condition is the last line of the hook.
Ubuntu systems will error out on `[[` in shell scripts with `#!/bin/sh` as the shebang.
git_template
Inspired by http://tbaggery.com/2011/08/08/effortless-ctags-with-git.html * Make `ctags` executable configurable * Adds `git ctags` * Runs `ctag` on `commit` / `branch` / `checkout` * Extensible via `~/.git_template.local/hooks/{pre,post}-*` * explain `git_template` under `git` section