+[submodule "pdf-tools"]
+ path = lib/pdf-tools
+ url = git@github.com:politza/pdf-tools.git
+ build-step = make
+ build-step = borg-byte-compile
+ build-step = borg-update-autoloads
+ # pdf-tools-install creates `lisp/epdfinfo', which makes git think
+ # that the submodule is dirty. so, let's ignore the untracked
+ # files of pdf-tools' submodule
+ ignore = untracked