References Homebrew/homebrew#26748.

Closes Homebrew/homebrew#26742.

This should be "resource", not "resources", though it works anyway
because there is a also "resource" reader method.

Fixes Homebrew/homebrew#26735.

Closes Homebrew/homebrew#25751.
Closes Homebrew/homebrew#26730.

Let's check for e.g. --help anywhere in the ARGV array rather than just
the first value to avoid brew upgrade --help causing problems.

Closes Homebrew/homebrew#26675.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

References Homebrew/homebrew#12652.

This commit adds additional formatting options to the graph. Most noticeable is a top-to-bottom layout (rather than the previous left-to-right), and nicer fonts on everything.

More subtly, the ranking mechanism has been updated so that the "Safe to Remove" cluster is always at the highest rank (fixing a bug where non-leaf nodes could have been placed next to it,) and added better margins and padding. The rank separation was also decreased for a more compact graph.

Under the hood, the GraphViz output code was updated to support attributes with a list of sub-attributes (for example, 'graph [fontsize="11", fontname="Helvetica"]') and to not put quotes around HTML-like labels in clusters.

Closes Homebrew/homebrew#26651.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

This reverts commit c32ab0a35a2dfa9b593f759ef0ae8b7af077b0b7.

There are other hard-coded uses of HEAD, in build_options for instance.
These all need to be fixed before enabling this.

Closes Homebrew/homebrew#25868.

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

This change allows users to install the `launchctl` wrapper in the
`reattach-to-user-namespace` formula which makes the command work in
Tmux and other non-standard environments.

Closes Homebrew/homebrew#26609.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

This doesn't handle paginated results, but it fetches the 100 most
starred results so that's probably good enough for now.

Fixes Homebrew/homebrew#26566.

Homebrew currently recognizes "--head" during the install process, but
rather than actually fetch HEAD it just nags the user to use the
correct option.	Since we recognize the spelling anyway, this just
promotes the lowercase version to an official alias.

Closes Homebrew/homebrew#26555.

The example formula had no information about how
to find the current bulding directory. Now it has ;)

Closes Homebrew/homebrew#26554.

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

Returning nil is in the contract of the Comparable module, and a future
version of Ruby will no longer hide this error.