If the user hasn't defined BASH_IT_LOG_LEVEL, then the integer comparison fails. Handle it by defaulting to '1'.
If lib/log is loaded improperly, the BASH_IT_LOG_PREFIX may be undefined. Unlikely, but no harm in handling it too.
Likewise, if no theme is loaded, then $echo_green, $echo_normal, et al are not defined.
Check if `brew` is installed every time, and *unset* `$BASH_IT_HOMEBREW_PREFIX` if not found. This accounts for the edge-case of a user _uninstalling_ Homebrew without restarting the shell.
New function `_bash_it_homebrew_check()` sets global variable `$BASH_IT_HOMEBREW_PREFIX` using `brew --prefix` if `brew` exists as a valid command. If `brew` isn't installed, then return failure.
Plugins can test for `brew` by calling this function and, if it succeeds, they can rely on `$BASH_IT_HOMEBREW_PREFIX` being defined properly.
Renamed the function to _bash-it_update_migrate_and_restart
Use pushd/popd instead of passing another parameter
Document the function so it will be clear that it does not return
* lib/helpers: use `$OSTYPE` instead of `$(uname)`
* plugins/osx: use `$OSTYPE` instead of `$(uname)`
* plugins/boot2docker: use `$OSTYPE` instead of `$(uname)`
* plugins/python: use `$OSTYPE` instead of `$(uname)`
* plugins/base: use `$OSTYPE` instead of `$(uname)`
Alsö, use `[[` instead of `[` as the former has less insane argument handling being shell syntax rather than a builtin command that must emulate being a real binary
* completion/brew: use `$OSTYPE` instead of `$(uname)`
* completion/git: use `$OSTYPE` instead of `$(uname)`
Alsö, use `[[` instead of `[`.
* completion/fabric: use `$OSTYPE` instead of `uname`
* theme/demula: use `$OSTYPE` instead of `$(uname)`
* theme/rana: use `$OSTYPE` instead of `$(uname)`
Added a vendored lib loading routine in bash-it.sh
Added documentation on how to vendor libs in bash-it
Added and fixed plugins using preexec
Added tests for two plugins
Removed the old preexec lib