3 <a href="https://mruby.org/">
4 <img src="https://avatars.githubusercontent.com/u/1796512?s=200&v=4"
5 alt="The mruby programming language" title="mruby">
9 <a href="https://github.com/marketplace/actions/super-linter">
10 <img src="https://github.com/mruby/mruby/actions/workflows/super-linter.yml/badge.svg"
11 alt="GitHub Super-Linter">
17 mruby is the lightweight implementation of the Ruby language complying to (part
18 of) the [ISO standard][ISO-standard] with more recent features provided by Ruby 3.x.
19 Also, its syntax is Ruby 3.x compatible except for pattern matching.
21 You can link and embed mruby within your application. The "mruby" interpreter
22 program and the interactive "mirb" shell are provided as examples. You can also
23 compile Ruby programs into compiled byte code using the "mrbc" compiler. All
24 these tools are located in the "bin" directory. "mrbc" can also generate
25 compiled byte code in a C source file. See the "mrbtest" program under the
26 "test" directory for an example.
28 This achievement was sponsored by the Regional Innovation Creation R&D Programs
29 of the Ministry of Economy, Trade and Industry of Japan.
33 To get mruby, you can download the stable version 3.3.0 from the official mruby
34 GitHub repository or clone the trunk of the mruby source tree with the "git
35 clone" command. You can also install and compile mruby using [ruby-install](https://github.com/postmodern/ruby-install), [ruby-build](https://github.com/rbenv/ruby-build) or [rvm](https://github.com/rvm/rvm).
37 The latest development version of mruby can be downloaded via the following URL: [https://github.com/mruby/mruby/zipball/master](https://github.com/mruby/mruby/zipball/master)
39 The trunk of the mruby source tree can be checked out with the
43 $ git clone https://github.com/mruby/mruby.git
48 The URL of the mruby homepage is: <https://mruby.org>.
52 We don't have a mailing list, but you can use [GitHub issues](https://github.com/mruby/mruby/issues).
54 ## How to compile, test, and install (mruby and gems)
56 For the simplest case, type
62 See the [compile.md](doc/guides/compile.md) file for the detail.
64 ## Building documentation
66 There are two sets of documentation in mruby: the mruby API (generated by YARD) and C API (Doxygen and Graphviz)
68 To build both of them, simply go
74 You can also view them in your browser
81 ## How to customize mruby (mrbgems)
83 mruby contains a package manager called "mrbgems" that you can use to create
84 extensions in C and/or Ruby. For a guide on how to use mrbgems, consult the
85 [mrbgems.md](doc/guides/mrbgems.md) file, and for example code, refer to the
86 [examples/mrbgems/](examples/mrbgems) folder.
90 mruby is released under the [MIT License](LICENSE).
94 mruby has chosen a MIT License due to its permissive license allowing
95 developers to target various environments such as embedded systems.
96 However, the license requires the display of the copyright notice and license
97 information in manuals for instance. Doing so for big projects can be
98 complicated or troublesome. This is why mruby has decided to display "mruby
99 developers" as the copyright name to make it simple conventionally.
100 In the future, mruby might ask you to distribute your new code
101 (that you will commit,) under the MIT License as a member of
102 "mruby developers" but contributors will keep their copyright.
103 (We did not intend for contributors to transfer or waive their copyrights,
104 actual copyright holder name (contributors) will be listed in the [AUTHORS](AUTHORS)
107 Please ask us if you want to distribute your code under another license.
111 To contribute to mruby, please refer to the [contribution guidelines][contribution-guidelines] and send a pull request to the [mruby GitHub repository](https://github.com/mruby/mruby).
112 By contributing, you grant non-exclusive rights to your code under the MIT License.
114 [ISO-standard]: https://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=59579
115 [contribution-guidelines]: CONTRIBUTING.md