Otherwise next time it will assume the half-file is the whole file and fail
the md5 check.

We are more Markdown compliant, but it's still too verbose IMO.

I removed the rename and mv functions as when I wrote the tests I realised the function implied the pathname object would be updated to reflect the moved or renamed file. However that cannot be done. Also frankly I think writing it out in full makes clearer code.

Specifying -v/--verbose shows the build environment before the build

MACOS_VERSION contains the floating point value of the OS X version

A test for some floating point assumptions I make

Saves building our own tool to do the same job!

Added Formula::etc()

Added Pathname::write() convenience function which can write a string out to
the file it points too, raising if it would have to overwrite.

The PWD environment variable is apparently not set for root.

Signed Off By: Max Howell <max@methylblue.com>

I removed the Dir.chdir line altogether as it was a hacky solution to an issue
in Ruby that I encountered a lot during early development, ie. I'd brew rm
while working directory was set to that keg.

Discussion: d60fc4ba86d45255b0093303c45f6b1c2196fda2

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".

Signed-off-by: Max Howell <max@methylblue.com>

I confirmed this change with all relevant contributors first.

I used the imagemagick-installer script that made the rounds on Twitter lately as a basis.

But a number of improvements, eg. lets not mess around with the OS X installation of cups.

Because formula don't get named unless the brew kit instantiates them accessory formula were getting named "__UNKNOWN__". Which sucks.

This isn't ideal for me as I made the naming use @name and @version to ensure unique naming. Now it is possible to have name clashes in the cache. So I need to solve it better at some point.

Fixes Homebrew/homebrew#21

Closes Homebrew/homebrew#8

brew install without additional arguments that is.

Add a note that 'exit 1' will abort the installation in --debug mode.

Signed Off By: Max Howell <max@methylblue.com>

I ammended the text slightly and made the lines all 78 chars wide maximum.

Fix git download strategy

A formula can have just a @head url or the user can specify to install HEAD
with --head. We support subversion and git checkouts.

The version is set to HEAD for head builds.

Next step is making brew update handle these installs correctly.