It's not sufficient to do this merely on `brew upgrade` because
`brew install` and `brew reinstall` can also result in formulae being
upgraded.
This requires moving logic from `cmd/upgrade.rb` to `upgrade.rb`. To
save you searching the diff the changes that resulted from doing that:
- Query the installed formulae from class state in `FormulaInstaller`
rather than the (incomplete) list that we passed into it.
- Don't output the "Checking dependents" message. It was there for
systems and configurations where this is slow but for most users
and most installations this will be a (annoying, noisy) no-op.
Fixes https://github.com/Homebrew/brew/issues/7860
Anywhere we can use `blob/master` we can use `blob/HEAD` instead. This
will make life easier if we ever rename our default branch in future
(once/if Git and GitHub provides the necessary tooling to do so).
The behavior of some programs (e.g., emacs) differs depending on
whether INFOPATH is terminated in a colon or not. For example, the
info viewer built into emacs has a default list of places from which
it will draw info files, and it will only check this if either (a)
INFOPATH is unset, or (b) INFOPATH ends in a colon.
Currently brew shellenv prepends to the existing $INFOPATH and will
separate with a colon if $INFOPATH already exists, but if it does not
it will not terminate in a colon. As a result, info
pages (like emacs and elisp) are missing from the info viewer.
The existing brew shellenv logic used a parameter expansion trick to
include a colon only if it was prepending to an extant INFOPATH, but
because we want brew's contribution to the INFOPATH to always end in a
colon (whether there's an existing INFOPATH or not), we don't have to
use the parameter expansion trick
This commit only changes behavior for "other" shells (i.e., not fish,
csh, or tcsh) since I don't know how to append a colon to variables in
these shells.
