I went with 0555 as the permissions changing only occurs to bin, sbin and lib, so there shouldn't be any files in there for editing in general anyway.
Formulae can specify not to "clean" any particular file by reimplementing the skip_clean? function, in case some config file or what not ends up in there.
Also committing cosmetic fix to pretty_duration function.
We don't install documentation to save space. It seems pointless in this
modern age where the online docs are probably more up to date. However I do
believe this should be an option, defaulting to "don't install".
Because we modified the ENV global each install this propagated to consecutive
formulae. So exec a new brew process each install. This is the safest way
although Ruby exceptions don't propagate to the parent process so I worry
about it somewhat.
Documentation is all online nowadays, and is more current there.
Documentation often takes up more space than the rest of the package.
Package listings are now more relevent.
We'll make it optional as soon as one person complains.
Large refactor to Formula, mostly improving reliability and error handling but
also layout and readability.
General improvements so testing can be more complete.
Patches are automatically downloaded and applied for Formula that return a
list of urls from Formula::patches.
Split out the brew command logic to facilitate testing.
Facility from Adam Vandenberg to allow selective cleaning of files, added
because Python doesn't work when stripped.
