percona-server57 and keg only copies for multi version installs

[bbergstrom]

Description

• Created percona-server57 with https://github.com/Homebrew/homebrew/blob/65ff734263e0599fc6f194a22162d4b6b1cba395/Library/Formula/percona-server.rb as a base. Modified it to use latest stable version.
• Created percona-server55-keg-only as a keg only copy of percona-server55 for multi version installs. Modified to use versioned data directory and not conflict with other percona-server formulas..
• Created percona-server57-keg-only as a keg only copy of percona-server57 for multi version installs. Modified to use versioned data directory and not conflict with other percona-server formulas.
• Removed our outdated custom version of percona-server55 in favor of better and updated homebrew versions one.

Is easier to see changes by reviewing all commits after the first.

For reference: http://www.rubydoc.info/github/Homebrew/homebrew/master/Formula#keg_only-class_method

QA

Note, it shouldn't happen, but this has the risk of losing your existing mysql data directory.

Prep

mysql.server stop
brew tap --full sportngin/homebrew
cd /usr/local/Library/Taps/sportngin/homebrew-homebrew/
git pull
git checkout percona57

Tests

brew install percona-server55 && brew install percona-server57 # should stop due to conflict
brew uninstall percona-server55 && brew install percona-server57  # Linked 5.7 install
brew install percona-server55-keg-only  # Keg only 5.5 with linked 5.7
brew install percona-server55 # should stop due to conflict
brew uninstall percona-server57 && brew uninstall percona-server57-keg-only && brew install  percona-server55  # Linked 5.5 install
brew install percona-server57-keg-only  # Keg only 5.7 with linked 5.5

Reset

brew uninstall percona-server57-keg-only
cd /usr/local/Library/Taps/sportngin/homebrew-homebrew/
git checkout master
mysql_install_db --verbose --user=`whoami` --basedir="$(brew --prefix percona-server55)" --datadir=/usr/local/var/mysql --tmpdir=/tmp
mysql.server start

[anfleene]

installing 57 then 55 doesn't seem to conflict.

[anfleene]

Well it does once it tries to link it.

[bbergstrom]

@anfleene With the deletion of our percona-server55 forumla, its now resolving to https://github.com/Homebrew/homebrew-versions/blob/master/percona-server55.rb which doesn't know about ours. Do you think its worth forking that formula to make the conflict list accurate?

[anfleene]

meh. I think it's fine.