Fixes Homebrew/homebrew#10829.

Fixes Homebrew/homebrew#10958.

Again, "Homebrew" is changed to "homebrew" before rendering to the user.

See previous commit's explanation.

We allow homebrew/dupes for instance, rather than Homebrew/dupes. Because nobody likes shifting in the terminal.

In the process of doing this I discovered some case-insensitive filesystem bugs we have avoided before because I had the foresight to mandate lowercase in formula names. GitHub considers Homebrew and homebrew to be different (even though you can't create both). So we had to allow case insensitivity in tap input. I have made it now so the resulting directory however is lowercased, neatly avoiding the issue. And so we also downcase tap arguments when applying them to tap directories or formula.

The symlinks in Formula must be updated.

brew-update needs to be able to unsymlink removed stuff from taps too.

For when the symlink for a tap already exists and points to the thing we are about to symlink. This can happen, mostly because my code has sucked, but since the filesystem can be edited by the user at whim, it's possible then too.

Fixes Homebrew/homebrew#11018.

We warn if you are not running the latest Leopard or Snow Leopard.
(We do not currently check Lion or Mountain Lion versions.)

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Closes Homebrew/homebrew#8870.

Fixes:

$ brew tap adamv/alt
...blah blah blah..
$ brew tap josegonzalez/php
...blah blah blah...
Warning: Could not tap josegonzalez/php/php over mxcl/master/php

Where it should be "over adamv/alt/php".

So you can do e.g.

    $ brew install adamv<TAB>
    Display all 106 possibilities? (y or n)
    $ brew install adamv/alt/openss<TAB>
    adamv/alt/openssh     adamv/alt/openssl098  adamv/alt/openssl100

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Fixes Homebrew/homebrew#10994.

This means `brew search` always does some network operations. Which is a shame, but I think (for brew) fine. Probably the no-connectivity handling needs to be improved.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Fixes Homebrew/homebrew#10951.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Whoops.

This shouldn't happen but is possible and we should handle it.

Also added some puts when tapping/untapping.

I got fed up writing HOMEBREW_REPOSITORY/"Library" and also correcting mistakes when I did HOMEBREW_PREFIX instead.

Rationale: Let's not have duplicate-names. Insisting on only one directory lets the filesystem enforce this unique-naming criteria for us.

We special-case adamv/alt for now, until we remove it.

Also propagate dependency info through exception if possible so the error message is more useful.

Since these cause trouble.

Required me to spoil tap's code. All in the name of DRY! Alas!

Rationale, lets only pay attention to the output when it matters. Speeding up diagnosis.

Note I removed some of the code that changed the URL to be that of the github.user. Because this doesn't make any sense really. We want people to reference the commit history for whatever fork of homebrew they have checked out. So this is now what it does.

Rationale: well, it should always have been like this!

However now we are opening ourselves up to more-mixed installations of formula not maintained by us, it's important that