Ruby 版本管理工具，rbenv 1.0 發布

rbenv 是個健壯的工具，遵循 UNIX 標準來實現 Ruby 每個項目版本和相關運行時環境的管理。

rbenv 1.0 相比 0.4.0 版本，改進內容如下：

速度

• Speed up rbenv with dynamically loaded realpath C extension

• Speed up rbenv rehash when there are many Ruby versions with similar sets of executables

• Improve performance of rbenv-which for "system" version

• Avoid rbenv-exec calling out to rbenv-version-name twice

新特性

• New plugin hooks version-name and version-origin enable plugin authors to hook into version selection logic.

• rbenv versions --skip-aliases --bare will only list versions that are not aliases (symlinks) for other versions.

• rbenv version-file <dir> finds a .ruby-version file in the target directory or any of its parent directories.

• rbenv init now recognizes and supports fish shell syntax.

• rbenv --debug <command> is a shortcut for enabling RBENV_DEBUG.

Shell 集成

• Fix rbenv() shell function in ksh and dash

• Ubuntu fix: use source instead of .

• Reliably detect user's current shell in rbenv init

• Improve detection of completion support for commands

• Fix detecting completions support on OpenBSD

• Check if completion script is readable

• Suppress shell warnings when hashing is disabled by set +h

• rbenv() shell function preserves multiline output of sh-* commands

常規改進

• rbenv local now respects .ruby-version file in parent directories as well

• rbenv versions now emits a warning when no Ruby versions were found

• Consistently support rbenv <command> --help as alternative to rbenv help <command>

• Improve parsing of git revision in rbenv --version when rbenv was installed from git

• Export PS4 when RBENV_DEBUG is set for more informative debug output

Bug 修復

• Fix incorrect formatting of rbenv-help output under MAWK (Ubuntu)

• Prefer gawk over awk if both are available

• Fix resolving symlinks in rbenv-hooks

• Fix iterating through paths that have spaces in them

• Fix rbenv rehash when paths have spaces in them

• More useful error message when rehash fails on a non-writable directory

• Make rbenv-exec fail for invalid Ruby version

• Bail out early if readlink is not available

• Properly resolve symlinks when listing hook scripts

• Better error message for rbenv prefix system

• Fix reading .ruby-version on platforms that don't support process substitution

• Remove carriage return characters in .ruby-version files

• Fixes rbenv on OpenBSD and other systems that don't support head -c

• Guard against exported CDPATH

• Ensure that IFS is reset to its original value within hook scripts

下載：https://github.com/rbenv/rbenv/archive/v1.0.0.zip 

rbenv讓你通過簡單的方式在Ruby多個版本及實現之間進行切換。