This is so so that check_dependencies_bottled can be called when bottles
are being poured; implement check_dependencies_bottled

This becomes MacOS.{install_name_tool,otool}, only do check_xcode if
xcode is installed, otherwise emit a warning

Check @@attempted for cctools so that we only attempt the relocation
install once, skip cxxstdlib check in cctools to prevent otool
execution prior to installation, skip fixing install names if
relocation is not required

Install it as a dependency unless already satisfied by Xcode.

require cctools_requirement

cctools_requirement should be satisfied by cctools present in opt

add build_env => false to the satify block options in CctoolsRequirement

Until it can be adapted to not call otool on systems w/o XCode/CLT

Toggled with does_not_need_relocation method in bottle block.
Also declare needs_relocation? accessors in software/bottle specs.

Closes Homebrew/homebrew#42413.

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

Closes Homebrew/homebrew#42409.

Signed-off-by: Xu Cheng <xucheng@me.com>

Closes Homebrew/homebrew#42408.

Closes Homebrew/homebrew#42354.

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

Since trailing commas in method argument lists are a syntax error in
1.8, let's enforce the default rule of `TrailingComma`(i.e. `no_comma`)

Closes Homebrew/homebrew#42398.

Signed-off-by: Xu Cheng <xucheng@me.com>

Closes Homebrew/homebrew#42347.

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

Closes Homebrew/homebrew#42355.

Signed-off-by: Xu Cheng <xucheng@me.com>

I also removed the `-L` flag which is already present in
`HOMEBREW_CURL_ARGS`.

Closes Homebrew/homebrew#42352.

Signed-off-by: Baptiste Fontaine <batifon@yahoo.fr>

Closes Homebrew/homebrew#42345.

- The name of the subdirectory under site-lisp may not be exactly the
  same as the name of the package

- `(normal-top-level-add-subdirs-to-load-path)` adds every subdirectory
  of `default-directory` to the load-path, so users don't have to update
  their load-path for every package they install.

Closes Homebrew/homebrew#42309.

Closes Homebrew/homebrew#42245.

Closes Homebrew/homebrew#42023.

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

Before
```
$ time brew readall
brew readall  10.63s user 0.36s system 99% cpu 11.003 total
```

After
```
$ time brew readall
brew readall  5.62s user 0.24s system 99% cpu 5.859 total
```

Closes Homebrew/homebrew#42302.

Signed-off-by: Xu Cheng <xucheng@me.com>

Fixes Homebrew/homebrew#42297.

Closes Homebrew/homebrew#42293.

Signed-off-by: Xu Cheng <xucheng@me.com>

Fixes Homebrew/homebrew#42147.
Closes Homebrew/homebrew#42205.

Signed-off-by: Xu Cheng <xucheng@me.com>

Also check stable_prefix when current acitve_spec is not :stable