Following environmental variables can be used.

Name Description Default
HOMEBREW_BREWFILE Set place of Brewfile. “~/brewfile/Brewfile”
HOMEBREW_BREWFILE_BACKUP If it is set to not empty, Brewfile’s back up is made to HOMEBREW_BREWFILE_BACKUP when Brewfile is updated. “”
HOMEBREW_BREWFILE_LEAVES Set 1 if you want to list up only leaves (formulae which don’t have any dependencies, taken by brew leaves). 0
HOMEBREW_BREWFILE_ON_REQUEST Set 1 if you want to list up only packages installed on request. If it is set 1, it is given priority over LEAVES option. Note: This list can be changed if packages installed by brew-file in new machine. (some “on_request” package could be installed as “as_dependencies” of others before being installed on request.) 0
HOMEBREW_BREWFILE_TOP_PACKAGES Packages which are listed in Brewfile even if leaves is used and they are under dependencies. (Useful for such go, which is used by itself, but some packages depend on it, too.) “”
HOMEBREW_BREWFILE_EDITOR Set editor to be used by brew file edit. If you use brew-wrap or call brew-file directly, the environmental variable EDITOR also works. If you do not use brew-file and do not set this variable, EDITOR does not work and the system default editor will be used. “”
HOMEBREW_BREWFILE_VERBOSE Set verbose level (“debug”, “info”, “warning”, “error”, “critical”). info
HOMEBREW_BREWFILE_APPSTORE Set Appstore application management level. 0: do not, 1: manage fully, 2: use list to install, but do not update by init command even if new App is added (but package is removed from the list at brew file brew mas uninstall <app id>). 1
HOMEBREW_CASK_OPTS This is Cask’s option to set cask environment. If appdir or fontdir is set with these options, Brew-file uses these values in it. “”