I held off on this as I wasn't sure it made sense. Eg. if you install you'd expect it to install the same version as before? But with HEAD formula you always want the newest, that's the point. Otherwise it should be tagged/revisioned.

When cloning a mercurial repository from a tagged revision, that tag definition
isn't actually included. This causes `hg archive -r tag_name` to fail.

Instead, just clone the repository's head and the `hg archive -r revision` will
handle getting the correct revision to for the build

Fixes Homebrew/homebrew#204

Fixes Homebrew/homebrew#200. Fixes Homebrew/homebrew#202. Fixes Homebrew/homebrew#203.

Removed DEFAULT_USER, etc. constants, as code is clearer with actual values IMO, in this case.

* Only invoke git if --github was passed; speeds up brew info --all
* Use current branch for --github instead of master.

Bzr on PyPi is problematic for now.

Nice bug there where we never removed any symlinks, because the unlink step requires the keg to be full of files to determine what symlinks to remove.

This is necessary for those who installed Homebrew using the suggested tarball method.

Too late for them though.

Updated comments to match new default patch level from revision 4fe374d

Being able to commit parts of diffs can bite you if you aren't careful.

In the FFMPEG formula the revision number is represented as an integer,
this ends up as an argument to Kernel#exec and it doesn't really like
that. The fix is to cast all arguments to a string.

Fixes Homebrew/homebrew#171.

Fixes Homebrew/homebrew#136

Turns out $?.to_i is a 16bit int with some bit flags in the first byte.

-fomit-frame-pointer is included for any optimisation level above O2 (including Os)

Setting MACOS_DEPLOYMENT_TARGET is unecessary if you are just setting it the same as the OS X you are running.

Makes a big difference on OS X, you can still use the GUI and that.

This is what we did for gcc_4_2 after all.

This means our include directory is prioritised above all -I but after all other system directories. This is how it should be.

Also helps fix Homebrew/homebrew#113.