Unmigrated formulae cause hard-to-debug issues and relying on detection
on Git alone is faster but not comprehensive. Instead, iterate through
renamed, installed formulae every time and migrate them.
Closes#1770.
Taps can include completion scripts for external commands under
`completions/bash`, `completions/fish`, or `completions/zsh`. `brew tap`
will automatically install these into the correct directories during
install.
Imports from homebrew/versions are migrated from that tap and then
renamed immediately when they hit homebrew/core. This did not trigger
our previous rename detection so address these to improve the output and
handle migration correctly.
- Don't output the analytics message and mark it as read if
`HOMEBREW_NO_ANALYTICS_THIS_RUN` is set. This mostly simplifies the
installer code where we can display the message ourselves there rather
than having `brew update` print it out sometimes and not others (i.e.
when there's no system Git installed).
- Use the shell's audible bell to nudge people to actually read this
message (and give them less excuse to complain when they don't).
- Add an extra newline and bold all the analytics messaging so it's
more visible in the output.
If we have a `brew.sh` which has set
`HOMEBREW_ENABLE_AUTO_UPDATE_MIGRATION` then let's allow an auto-update
migration. That's because it contains the fix below it _before_ the
update happened which means the auto-update won't fail in the same way
as if updating from an old version.
Before stashing also try to cancel any current merge, rebase and
reset. This will prevent any data loss but also make the stash more
likely to succeed.
Migrate a HOMEBREW_REPOSITORY and HOMEBREW_PREFIX of `/usr/local` so
that the HOMEBREW_REPOSITORY is now in `/usr/local/Homebrew`. This gives
us more flexibility on changing the repository layout in future and
avoids putting junk in `/usr/local` when not necessary (e.g. our
`README.md`).
Ensure that `brew update` always runs the LinkedKegs migration if needed
as it may not have been run by `brew update` if it was using `--preinstall` or
a `git pull` etc.
Also, if the old paths still exist: just use them instead.
Finally, always try to unlink/unpin before link/pin.
Fixes https://github.com/Homebrew/homebrew-core/issues/4918.
No longer output every cask under the list of changed formulae but
instead create a dedicated, unprinted report section for casks and then
iterate through that instead.
