# ruby-build ruby-build is an [rbenv](https://github.com/sstephenson/rbenv) plugin that provides an `rbenv install` command to compile and install different versions of Ruby on UNIX-like systems. You can also use ruby-build without rbenv in environments where you need precise control over Ruby version installation. See the [list of releases](https://github.com/sstephenson/ruby-build/releases) for changes in each version. ## Installation ### Installing as an rbenv plugin (recommended) Installing ruby-build as an rbenv plugin will give you access to the `rbenv install` command. git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build This will install the latest development version of ruby-build into the `~/.rbenv/plugins/ruby-build` directory. From that directory, you can check out a specific release tag. To update ruby-build, run `git pull` to download the latest changes. ### Installing as a standalone program (advanced) Installing ruby-build as a standalone program will give you access to the `ruby-build` command for precise control over Ruby version installation. If you have rbenv installed, you will also be able to use the `rbenv install` command. git clone https://github.com/sstephenson/ruby-build.git cd ruby-build ./install.sh This will install ruby-build into `/usr/local`. If you do not have write permission to `/usr/local`, you will need to run `sudo ./install.sh` instead. You can install to a different prefix by setting the `PREFIX` environment variable. To update ruby-build after it has been installed, run `git pull` in your cloned copy of the repository, then re-run the install script. ### Installing with Homebrew (for OS X users) Mac OS X users can install ruby-build with the [Homebrew](http://brew.sh) package manager. This will give you access to the `ruby-build` command. If you have rbenv installed, you will also be able to use the `rbenv install` command. *This is the recommended method of installation if you installed rbenv with Homebrew.* brew install ruby-build Or, if you would like to install the latest development release: brew install --HEAD ruby-build ## Usage Before you begin, you should ensure that your build environment has the proper system dependencies for compiling the wanted Ruby version (see our [recommendations](https://github.com/sstephenson/ruby-build/wiki#suggested-build-environment)). ### Using `rbenv install` with rbenv To install a Ruby version for use with rbenv, run `rbenv install` with the exact name of the version you want to install. For example, rbenv install 2.1.0 Ruby versions will be installed into a directory of the same name under `~/.rbenv/versions`. To see a list of all available Ruby versions, run `rbenv install --list`. You may also tab-complete available Ruby versions if your rbenv installation is properly configured. ### Using `ruby-build` standalone If you have installed ruby-build as a standalone program, you can use the `ruby-build` command to compile and install Ruby versions into specific locations. Run the `ruby-build` command with the exact name of the version you want to install and the full path where you want to install it. For example, ruby-build 2.1.0 ~/local/ruby-2.1.0 To see a list of all available Ruby versions, run `ruby-build --definitions`. Pass the `-v` or `--verbose` flag to `ruby-build` as the first argument to see what's happening under the hood. ### Custom definitions Both `rbenv install` and `ruby-build` accept a path to a custom definition file in place of a version name. Custom definitions let you develop and install versions of Ruby that are not yet supported by ruby-build. See the [ruby-build built-in definitions][definitions] as a starting point for custom definition files. [definitions]: https://github.com/sstephenson/ruby-build/tree/master/share/ruby-build ### Special environment variables You can set certain environment variables to control the build process. * `TMPDIR` sets the location where ruby-build stores temporary files. * `RUBY_BUILD_BUILD_PATH` sets the location in which sources are downloaded and built. By default, this is a subdirectory of `TMPDIR`. * `RUBY_BUILD_CACHE_PATH`, if set, specifies a directory to use for caching downloaded package files. * `RUBY_BUILD_MIRROR_URL` overrides the default mirror URL root to one of your choosing. * `RUBY_BUILD_SKIP_MIRROR`, if set, forces ruby-build to download packages from their original source URLs instead of using a mirror. * `RUBY_BUILD_ROOT` overrides the default location from where build definitions in `share/ruby-build/` are looked up. * `CC` sets the path to the C compiler. * `RUBY_CFLAGS` lets you pass additional options to the default `CFLAGS`. Use this to override, for instance, the `-O3` option. * `CONFIGURE_OPTS` lets you pass additional options to `./configure`. * `MAKE` lets you override the command to use for `make`. Useful for specifying GNU make (`gmake`) on some systems. * `MAKE_OPTS` (or `MAKEOPTS`) lets you pass additional options to `make`. * `MAKE_INSTALL_OPTS` lets you pass additional options to `make install`. * `RUBY_CONFIGURE_OPTS`, `RUBY_MAKE_OPTS` and `RUBY_MAKE_INSTALL_OPTS` allow you to specify configure and make options for buildling MRI. These variables will be passed to Ruby only, not any dependent packages (e.g. libyaml). ### Applying patches to Ruby before compiling Both `rbenv install` and `ruby-build` support the `--patch` (`-p`) flag that signals that a patch from stdin should be applied to Ruby, JRuby, or Rubinius source code before the `./configure` and compilation steps. Example usage: ```sh # applying a single patch $ rbenv install --patch 1.9.3-p429 < /path/to/ruby.patch # applying a patch from HTTP $ rbenv install --patch 1.9.3-p429 < <(curl -sSL http://git.io/ruby.patch) # applying multiple patches $ cat fix1.patch fix2.patch | rbenv install --patch 1.9.3-p429 ``` ### Checksum verification If you have the `shasum`, `openssl`, or `sha256sum` tool installed, ruby-build will automatically verify the SHA2 checksum of each downloaded package before installing it. Checksums are optional and specified as anchors on the package URL in each definition. (All bundled definitions include checksums.) ### Package download mirrors ruby-build will first attempt to download package files from a mirror hosted on Amazon CloudFront. If a package is not available on the mirror, if the mirror is down, or if the download is corrupt, ruby-build will fall back to the official URL specified in the definition file. You can point ruby-build to another mirror by specifying the `RUBY_BUILD_MIRROR_URL` environment variable--useful if you'd like to run your own local mirror, for example. Package mirror URLs are constructed by joining this variable with the SHA2 checksum of the package file. If you don't have an SHA2 program installed, ruby-build will skip the download mirror and use official URLs instead. You can force ruby-build to bypass the mirror by setting the `RUBY_BUILD_SKIP_MIRROR` environment variable. The official ruby-build download mirror is sponsored by [37signals](http://37signals.com/). ### Package download caching You can instruct ruby-build to keep a local cache of downloaded package files by setting the `RUBY_BUILD_CACHE_PATH` environment variable. When set, package files will be kept in this directory after the first successful download and reused by subsequent invocations of `ruby-build` and `rbenv install`. The `rbenv install` command defaults this path to `~/.rbenv/cache`, so in most cases you can enable download caching simply by creating that directory. ### Keeping the build directory after installation Both `ruby-build` and `rbenv install` accept the `-k` or `--keep` flag, which tells ruby-build to keep the downloaded source after installation. This can be useful if you need to use `gdb` and `memprof` with Ruby. Source code will be kept in a parallel directory tree `~/.rbenv/sources` when using `--keep` with the `rbenv install` command. You should specify the location of the source code with the `RUBY_BUILD_BUILD_PATH` environment variable when using `--keep` with `ruby-build`. ## Getting Help Please see the [ruby-build wiki][wiki] for solutions to common problems. [wiki]: https://github.com/sstephenson/ruby-build/wiki If you can't find an answer on the wiki, open an issue on the [issue tracker](https://github.com/sstephenson/ruby-build/issues). Be sure to include the full build log for build failures. ### License (The MIT License) Copyright (c) 2012-2013 Sam Stephenson Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.