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.
Do this to ensure that any symlinks in the Homebrew prefix and/or in
Applications are removed to stop issues with stale symlinks causing
Casks from being installed correctly.
- When running `brew update` and there’s been no changes from upstream
on any repositories there’s no need to call the (relatively) slow `brew
update-report` when we already know what it will say (“Already up-to
date.”).
- When any`git fetch`es fail then throw out an error at the end of the
output and produce a failing exit code (closes#65).
This prevents `brew` self-calls from interacting with the stickiness of
HOMEBREW_NO_ANALYTICS being persisted to the brew repo and accidentally
disabling analytics permanently when it should have been for just one run,
while restoring the stickiness of an explicit user-supplied
HOMEBREW_NO_ANALYTICS.
Provide a single command that can be run to disable analytics, run it if
`HOMEBREW_NO_ANALYTICS` is ever set and remove the user UUID file in
that case too.
References https://github.com/Homebrew/brew/issues/142.
Make sure that users are notified on the first run of `brew update`
after we enabled analytics about how it works and how to opt-out. This
will be shown to all users who have not already seen this message from
`brew update` or through a new Homebrew installation.
References https://github.com/Homebrew/install/pull/42
References https://github.com/Homebrew/brew/issues/142
