Renamed formulae will cease to display as an add/delete pair and instead
end up the in the "Renamed" section. In the future we should be able to
take this information and use it to rename existing kegs during updates,
allowing us to rename formulae without breaking upgrades.

Renaming a formula requires renaming the class, so there will be at
least one add/delete pair in the file. Thus, the similarity threshold
for detecting renames is set at 85% to allow a little bit of content
turnover without losing track of the rename.

Closes Homebrew/homebrew#11158.

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

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

If the tap-formula wasn't symlinked for some reason, don't throw an exception—the job is already done.

Refs Homebrew/homebrew#11091.

Having path directories with trailing slashes can cause other false
warnings.

Closes Homebrew/homebrew#9986.

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

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

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

Some times the module to import is different than the module to install
when dealing with external dependencies. This change allows an optional
import name to be specififed when it is different from the module name.

Closes Homebrew/homebrew#11078.

Closes Homebrew/homebrew#11098.

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

Closes Homebrew/homebrew#11044.

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

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

Some formulae have local info/dir files from before 9610ff2, and
attempting to link their info/dir over PREFIX/share/info/dir caused
linking to fail.

share/info files were always being linked if they existed, regardless of
whether the user had HOMEBREW_KEEP_INFO set. This primarily affects
users with software built before
9610ff2e9e06931693f49d4377ee26c0e664c547.

This also fixes a bug in Keg#link_dir, in which a file would always be
linked if no argument was passed.

The regexp that handles skipping info files was only skipping
info/*.info files, but several formula would create info/dir files as
well. Since these conflicted with each other, Homebrew would error out
during the linking step.

The print wrapper which has its own `puts` broke this line; though with
the changes to `link` it isn't necessary any longer, so just remove it.

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

In this case the user will simply have to delete all but one keg in order to use the command that uses ARGV.kegs.

Refs Homebrew/homebrew#11050.

If the link already exists exactly (well almost exactly) as we are about to correct it, then it's okay. Otherwise we error out. This is a safe choice, and really, the correct choice too.

This will prevent the tickets like Homebrew/homebrew#11050 from occurring.

Refs http://stackoverflow.com/questions/9762943

The system ln no longer outputs anything. Though the user can force its output with a --verbose of course. So in cases where it's not the usual of: not writable or existing file, we can ask the user to run with --verbose. I don't particularly like hiding its output, but it just confused the error IMO since it is creating a relative symlink the output was weird every time I've seen it in tickets.

I made a print wrapper so that the brew-link output doesn't get mucked up if an exception is thrown.

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

Since 5bddaf2e ("Stop supportinb `brew install --force`), the --force
argument is still useful but only to overcome the blacklist
restrictions. Document this.

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

Everyone calls it "nodejs" so not having an alias to this is dumb.

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

Fixes Homebrew/homebrew#10829.