If the user has, for instance, a non-system "xml2-config" in the path
ahead of the system and Homebrew folders, ./configure scripts which
look for and use this config script will get confused.

This command looks for Cocoa Applications (.app bundles) in the prefix
of all installed formulae. If any are found, they are linked into
"~/Applications", the system-defined location for per-user apps.

A formula using svn can now provide a spec:
    :revisions => {...revision numbers...}
that contains a mapping of revision numbers to use
for externals.

The name of the external is keyed to the revision to
use for that external.

The symbol :trunk should be used to specify the reivsion
of the main repo.

An example from the Ffmpeg formula:
    head 'svn://svn.ffmpeg.org/ffmpeg/trunk

',
        :revisions => { :trunk => 22916, 'libswscale' => 31045 }

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Now makes use of `svn up` to make cache act like
a cache. Externals without a revision specified
are now checked out at HEAD, whereas before they
were ignored. Escaping arguments to backticks.
Making sure main repo is checked out before the
externals.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

See:

* http://github.com/mxcl/homebrew/issues/issue/1359
* http://github.com/mxcl/homebrew/issues/issue/1438

Homebrew will now look for external commands that are +x on PATH, named
as "brew-<cmd>" or "brew-<cmd>.rb"

* Shell scripts are exec'd with some HOMEBREW variables set in the ENV.
* Ruby scripts are require'd directly.

See: http://wiki.github.com/mxcl/homebrew/external-commands

* Move 'brew doctor' above both unknown command blocks and then...
* Merge unknown command blocks.

(This is cleanup for supporting external brew commands.)

This allows formulaes which use CVS to support:
  brew --cache [formula]

If a formula name is passed to "brew --cellar", output the location of that
brew in the Cellar (which will be "brew --prefix (formula)" without a version
sub-folder.)

This allows for:
  rm -rf `brew --cellar node`
for deleting all versions of node, installed or not.

Fixes Homebrew/homebrew#1514.

Like pkgconfig, perl5 & php, we don't want any one formula to "own" the
lib/python2.6 path.

Fixes Homebrew/homebrew#1218.

Homebrew expects manpages to be linked in shared/man/...
and not man/...

sceaga maintains Tiger and PPC support for Homebrew, so change our error
messages to refer to his branches.

* Add --config
* Alphabetize various lists
* Remove some local temp variables

Between the quick-install steps and other instructions on the Wiki,
this "self-link" script is no longer needed (and no longer recommended.)

Similiar to "brew create --macports", using --fink will do the corresponding
search for Fink packages.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

* Work on commands or dylibs
* Use an extension for the list of arches

Report "Expected <supplied digest>, got <file's digest>"
when verify_download_integrity sees a mismatch.  (It had
been, confusingly, reporting "Expected <file's digest>".)

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

If the user has linked the keg-only gettext, then a large number
of formulae which don't have "depends_on 'gettext'" will pick it
up anyway. Knowing this about the user's setup may help diagnose
bug reports.

brew_doctor's gcc version checks wasn't taking into account the case
where the user doesn't have one or both of GCC 4.0.x and 4.2.x installed.

Add a `--versions` switch to `brew list` that shows all versions found
in the cellar for the selected formulae.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Signed-off-by: David Höppner <0xffea@gmail.com>