This avoids `xcrun` popups when installing Homebrew on a non-Xcode
non-CLT machine.

Since #292, HOMEBREW_CACHE was moved to a per-user directory. This makes
it unsuitable to store global lock files on multiple users environment.

Therefore, introducing a global lock directory `/Library/Lock.d` to
store lock files from formula lockers as well as `brew update`.

Since patches sometimes change .gitignore and .travis.yml, it's
desirable to install them along with everything else if a resource needs
patching. Also, for resources that are git respositories, this allows
install to interact with git objects other than the commit specifically
checked out. More generally, this may help to avoid subtle issues by
preserving the fidelity of resources in cases where invisible dot files
play a functional role.

Closes #329.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

The new check also allows the `+` operator instead of our (still heavily
preferred) `/` operator for path concatenation and also triggers if the
operator is surrounded by whitespace.

Also recognizes single-quoted strings and uses a back reference to
match the closing quote for a slightly lower chance of false positives.

Closes #322.

git stash pop -q will print "Already up-to-date!" if untracked changes
are being poppped. This quiets it down unless verbose is set.

Closes #320.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

`Formula#keg_only?` could fail if it was invoked on a formula with a
`:provided_until_xcode43` or `:provided_until_xcode5` reason given to
`keg_only`, if neither the Command Line Tools nor Xcode was installed.
Check whether Xcode is installed before querying the Xcode version.

Closes #317.

Always pop stashed changes for Homebrew developers and only checkout
original branches for them (to avoid users who don't understand Git
ending up "stuck" on branches).

Closes https://github.com/Homebrew/homebrew-core/issues/1687.

* Move GitHub API module to utils/github.rb.

* Move curl method to utils/curl.rb.

* global: use long curl arguments and an array.

This makes the code more self-documenting.

* utils/curl: support reading curl's output.

* utils/github: use curl instead of open-uri.

It has far better proxy support.

* pull: set Homebrew user agent.

* gist-logs: remove trailing whitespace.

* gist-logs: use first instead of [0].

Easier to read.

* gist-logs: use curl-based GitHub.open method.

When a given dependency appears multiple times in a formula's dependency
tree, the inherited options for that dependency should accumulate rather
than being overwritten each time that dependency is considered by
expand_dependencies. In particular, this impacts "universal" since the
dependency should be built with universal unless all of its instances in
the dependency tree don't have "universal" as opposed to only if the last
instance considered has "universal."

Closes Homebrew/homebrew-core#1604.

Closes #308.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

Amends e4d01871. The `require` was
accidentally omitted causing the tests to fail very sporadically (or
always, when invoked as `brew tests --only=integration_cmds`).

Should help with being more consistent and makes sure to suggest the
HTTPS redirector even if equally valid HTTP URLs for specific hosts or
`central.maven.org` are used.

If the deletion of `HOMEBREW_CACHE` fails then the
`.migration_attempted` file will have still been deleted so ensure it is
recreated.

It defaults to being in $HOME but we override this meaning that we would
destroy the cache every time.

* cleanup: accept cache as an argument.

* config: move default HOMEBREW_CACHE to ~/Library.

* brew.1: document new default Homebrew cache.

* update-report: migrate legacy Homebrew cache.

Prior to this change there were only 3 instances of `STD(IN|OUT|ERR)`
versus 74 instances of `$std(in|out|err)` in the Homebrew code base. The
latter variant is also strongly suggested by bbatsov's Ruby Style Guide.

Some elements already used two-space indentation and we also prefer two
spaces in our Ruby code.

Closes #306.

Signed-off-by: Martin Afanasjew <martin@afanasjew.de>

Some Git versions create absolute `gitdir:` pointers in a submodule's
`.git` file, which can be problematic once the resource is staged and
causes various Git operations for those submodules to fail. Work around
this issue by fixing the submodule `.git` files after submodule update.

See Homebrew/homebrew-core#1520 for details and an affected formula.

Closes #302.

Signed-off-by: Dominyk Tiller <dominyktiller@gmail.com>

The FTP protocol is prone to getting firewalled to death in places, so where
we know we can avoid that by using either secure or more commonly accepted
protocols let's do so.

Examples of output:

```
* Stable: ftp://ftp.cpan.org/pub/CPAN/authors/id/N/NE/NEILB/Time-Duration-1.20.tar.gz should be `http://search.cpan.org/CPAN/authors/id/N/NE/NEILB/Time-Duration-1.20.tar.gz`
* Stable: Please use https:// for ftp://ftp.mirrorservice.org/sites/lsof.itap.purdue.edu/pub/tools/unix/lsof/lsof_4.89.tar.bz2
```

mirrorservice accepts `http://ftp.mirrorservice.org` as well, apparently.

This reverts commit 7bbcf9ca.

This reverts commit 146a16d6.

These aren't targeted at end users.

You need a non-shallow clone to push branches upstream so if you often
tap and untap taps (e.g. `homebrew/boneyard`) then you need to remember
to manually `fetch -unshallow`.