mruby-apr

A cross-platform MRuby port of the core system libraries from CRuby:

• IO (read, write, pipe, popen)
• File, FileTest, File::Stat
• Dir
• BasicSocket, UDPSocket, TCPSocket, TCPServer
• ENV
• Kernel ( `backticks`, system, spawn, & load)
• Process (spawn & wait)
• Process::Status (including the global $?)
• Forwardable
• Observer
• OpenStruct
• Pathname
• Shellwords

Specs

See the ruby/spec results

• mruby-spec is used to run relevant portions of ruby/spec against mruby.
• The original mruby-apr specs are here.

Building

Mac and Linux

1. Setup the dependencies

• Download libapr version 1.5.2 from Apache's website
• Download mruby-apr here.
• Add the following lines to your MRuby build_config.rb file.

spec.cc.flags << '-DMRB_INT64'
conf.gem 'path/to/mruby-apr'

2. Make & Rake

cd /path/to/apr
configure && make && sudo make install
cd /path/to/mruby
rake

Note: APR uses the off64_t type. If you're running 32-bit Linux and get errors like "Unknown type name off64_t" you'll need to define the preprocessor macro _LARGEFILE64_SOURCE.

Windows

1. Setup the dependencies

• Download libapr version 1.5.2 from Apache's website
• Download mruby-apr here.
• Add the following lines to your MRuby build_config.rb file.

spec.cc.flags << '-DMRB_INT64'
ENV['APR_HOME'] = "/path/to/your/libapr/build/dir"
conf.gem '/path/to/mruby-apr'

Notice that on windows, you must set APR_HOME to tell this gem where to find headers & lib files

2. CMake & Rake

APR comes with cmake scripts. You can use cmake to generate different kinds of project files for building APR. To name a few, Visual Studio, MinGW, and NMake are supported. Just use the same compiler you're using for MRuby.

Once APR is built

cd /path/to/mruby
rake

Platform Support

Primary development and testing done on Windows, Mac, Ubuntu, and Raspbian. However, it should work anywhere you can compile Apache APR.

Implementation Details

Apache APR provides a cross platform runtime library for C, allowing portable access to system resources (eg processes, files, sockets, etc.). mruby-apr provides bindings to this library to bring these capabilities to mruby, without having to code the cross-platform logic over again.

These bindings are provided at 2 distinct levels:

1. Direct bindings to libapr are provided in the APR module.

• These bindings provide a nearly identical api to libapr from mruby as is available in C.
• The main point of difference is that out-parameters in the C API correspond to multiple return values in the mruby API.

2. The direct bindings are used to implement portions of the CRuby standard library, purely in mruby.

• This provides a familiar and idiomatic API to system resources for ruby programmers.
• As with the Rubinius implementation, this should make it easier for Ruby programmers to hack on the stdlib.