install homebrew, git, rbenv&ruby-build, and ruby 1.9.3-p392

mac:~ hoge$ ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go)"
==> This script will install:
/usr/local/bin/brew
/usr/local/Library/...
/usr/local/share/man/man1/brew.1

Press ENTER to continue or any other key to abort
==> /usr/bin/sudo /bin/mkdir /usr/local
Password:
==> /usr/bin/sudo /bin/chmod g+rwx /usr/local
==> /usr/bin/sudo /usr/bin/chgrp admin /usr/local
==> Downloading and Installing Homebrew...
==> Installation successful!
You should run `brew doctor' *before* you install anything.
Now type: brew help
mac:~ hoge$ brew doctor
You must: brew install git
You must: brew install git
Warning: An outdated version of Git was detected in your PATH.
Git 1.6.6 or newer is required to perform checkouts over HTTP from GitHub.
Please upgrade: brew upgrade git
mac:~ hoge$ brew install git
==> Downloading http://git-core.googlecode.com/files/git-1.8.2.1.tar.gz
######################################################################## 100.0%
==> make prefix=/usr/local/Cellar/git/1.8.2.1 CC=/usr/bin/gcc-4.2 CFLAGS=-Os -w
==> make CC=/usr/bin/gcc-4.2 CFLAGS=-Os -w -pipe -march=core2 -msse4.1 -mmacosx-
==> make clean
==> make CC=/usr/bin/gcc-4.2 CFLAGS=-Os -w -pipe -march=core2 -msse4.1 -mmacosx-
==> Downloading http://git-core.googlecode.com/files/git-manpages-1.8.2.1.tar.gz
######################################################################## 100.0%
==> Downloading http://git-core.googlecode.com/files/git-htmldocs-1.8.2.1.tar.gz
######################################################################## 100.0%
==> Caveats
The OS X keychain credential helper has been installed to:
  /usr/local/bin/git-credential-osxkeychain

The 'contrib' directory has been installed to:
  /usr/local/share/git-core/contrib

Bash completion has been installed to:
  /usr/local/etc/bash_completion.d

zsh completion has been installed to:
  /usr/local/share/zsh/site-functions
==> Summary
/usr/local/Cellar/git/1.8.2.1: 1318 files, 27M, built in 2.7 minutes
mac:~ hoge$ brew doctor
Your system is ready to brew.
mac:~ hoge$ brew --config
HOMEBREW_VERSION: 0.9.4
ORIGIN: (none)
HEAD: (none)
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
CPU: dual-core 64-bit penryn
OS X: 10.6.8-i386
Xcode: 3.2.6
GCC-4.0: build 5494
GCC-4.2: build 5666
LLVM-GCC: build 2335
Clang: 1.7 build 77
X11: 2.3.6 => /usr/X11
System Ruby: 1.8.7-358
Perl: /usr/bin/perl
Python: /usr/bin/python
Ruby: /usr/bin/ruby => /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
mac:~ hoge$ brew install rbenv
==> Downloading https://github.com/sstephenson/rbenv/archive/v0.4.0.tar.gz
######################################################################## 100.0%
==> Caveats
To use Homebrew's directories rather than ~/.rbenv add to your profile:
  export RBENV_ROOT=/usr/local/var/rbenv

To enable shims and autocompletion add to your profile:
  if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi
==> Summary
/usr/local/Cellar/rbenv/0.4.0: 31 files, 152K, built in 7 seconds
mac:~ hoge$ echo 'eval "$(rbenv init -)"' >> .bash_profile
mac:~ hoge$ echo 'source ~/.rbenv/completions/rbenv.bash' >> .bash_profile
mac:~ hoge$ cat .bash_profile
eval "$(rbenv init -)"
source ~/.rbenv/completions/rbenv.bash
mac:~ hoge$ ls -a
.           .cups           Library
..          .dropbox        Movies
.CFUserTextEncoding .ssh            Music
.DS_Store       Desktop         Pictures
.Trash          Documents       Public
.bash_history       Downloads       Sites
.bash_profile       Dropbox


(relogin)

-bash: /Users/hoge/.rbenv/completions/rbenv.bash: No such file or directory
mac:~ hoge$ cd .rbenv
mac:.rbenv hoge$ ls
shims       versions
mac:.rbenv hoge$ mkdir completions
mac:.rbenv hoge$ cd completions/
mac:completions hoge$ nano rbenv.bash

(copy from https://github.com/sstephenson/rbenv/blob/master/completions/rbenv.bash)

(relogin)

mac:~ hoge$ rbenv install
rbenv: no such command `install'
mac:~ hoge$ brew install ruby-build
==> Installing ruby-build dependency: autoconf
==> Downloading http://ftpmirror.gnu.org/autoconf/autoconf-2.69.tar.gz
######################################################################## 100.0%
==> ./configure --prefix=/usr/local/Cellar/autoconf/2.69
==> make install
==> Caveats
This formula is keg-only: so it was not symlinked into /usr/local.

Xcode (up to and including 4.2) provides (a rather old) Autoconf.
==> Summary
/usr/local/Cellar/autoconf/2.69: 69 files, 2.0M, built in 19 seconds
==> Installing ruby-build dependency: pkg-config
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/pkg-config-
######################################################################## 100.0%
==> Pouring pkg-config-0.28.snow_leopard.bottle.tar.gz
/usr/local/Cellar/pkg-config/0.28: 10 files, 648K
==> Installing ruby-build
==> Downloading https://github.com/sstephenson/ruby-build/archive/v20130408.tar.
######################################################################## 100.0%
==> ./install.sh
/usr/local/Cellar/ruby-build/20130408: 75 files, 332K, built in 8 seconds
mac:~ hoge$ rbenv install
Usage: rbenv install [-f|--force] [-k|--keep] [-v|--verbose] <version>
       rbenv install [-f|--force] [-k|--keep] [-v|--verbose] <definition-file>
       rbenv install -l|--list

  -l/--list        List all available versions
  -f/--force       Install even if the version appears to be installed already
  -k/--keep        Keep source tree in $RBENV_BUILD_ROOT after installation
                   (defaults to $RBENV_ROOT/sources)
  -v/--verbose     Verbose mode: print compilation status to stdout

For detailed information on installing Ruby versions with
ruby-build, including a list of environment variables for adjusting
compilation, see: https://github.com/sstephenson/ruby-build#usage

mac:~ hoge$ rbenv install --list
Available versions:
  1.8.6-p383
  1.8.6-p420
  1.8.7-p249
  1.8.7-p302
  1.8.7-p334
  1.8.7-p352
  1.8.7-p357
  1.8.7-p358
  1.8.7-p370
  1.8.7-p371
  1.9.1-p378
  1.9.2-p180
  1.9.2-p290
  1.9.2-p318
  1.9.2-p320
  1.9.3-dev
  1.9.3-p0
  1.9.3-p125
  1.9.3-p194
  1.9.3-p286
  1.9.3-p327
  1.9.3-p362
  1.9.3-p374
  1.9.3-p385
  1.9.3-p392
  1.9.3-preview1
  1.9.3-rc1
  2.0.0-dev
  2.0.0-p0
  2.0.0-preview1
  2.0.0-preview2
  2.0.0-rc1
  2.0.0-rc2
  2.1.0-dev
  jruby-1.5.6
  jruby-1.6.3
  jruby-1.6.4
  jruby-1.6.5
  jruby-1.6.5.1
  jruby-1.6.6
  jruby-1.6.7
  jruby-1.6.7.2
  jruby-1.6.8
  jruby-1.7.0
  jruby-1.7.0-preview1
  jruby-1.7.0-preview2
  jruby-1.7.0-rc1
  jruby-1.7.0-rc2
  jruby-1.7.1
  jruby-1.7.2
  jruby-1.7.3
  jruby-1.7.4-dev
  maglev-1.0.0
  maglev-1.1.0-dev
  mruby-dev
  rbx-1.2.4
  rbx-2.0.0-dev
  rbx-2.0.0-rc1
  ree-1.8.6-2009.06
  ree-1.8.7-2009.09
  ree-1.8.7-2009.10
  ree-1.8.7-2010.01
  ree-1.8.7-2010.02
  ree-1.8.7-2011.03
  ree-1.8.7-2011.12
  ree-1.8.7-2012.01
  ree-1.8.7-2012.02
  topaz-dev
mac:~ hoge$ rbenv install 1.9.3-p392
Downloading yaml-0.1.4.tar.gz...
-> http://dqw8nmjcqpjn7.cloudfront.net/36c852831d02cf90508c29852361d01b
Installing yaml-0.1.4...
Installed yaml-0.1.4 to /Users/hoge/.rbenv/versions/1.9.3-p392

Downloading ruby-1.9.3-p392.tar.gz...
-> http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p392.tar.gz
Installing ruby-1.9.3-p392...
Installed ruby-1.9.3-p392 to /Users/hoge/.rbenv/versions/1.9.3-p392

mac:~ hoge$ ruby -v
ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin10.0]
mac:~ hoge$ rbenv versions
* system (set by /Users/hoge/.rbenv/version)
  1.9.3-p392
mac:~ hoge$ rbenv global 1.9.3-p392
mac:~ hoge$ rbenv rehash
mac:~ hoge$ rbenv versions
  system
* 1.9.3-p392 (set by /Users/hoge/.rbenv/version)
mac:~ hoge$ ruby -v
ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin10.8.0]