Original post

Build Status ❤️

What this is

This is a Ruby program that generates Rust program that generates Scala program that generates …(through 128 languages in total)… REXX program that generates the original Ruby code again.

Language Uroboros

(If you want to see the old 50-language version, see 50 branch.)

Usage

Ubuntu

If you are using Ubuntu 20.04 LTS (Focal Fossa), you can perform the following steps.

1. Install all interpreters/compilers.

First, you have to type the following apt-get command to install all of them.

$ sudo apt-get install afnix algol68g aplus-fsf aspectc++ aspectj 
  asymptote ats2-lang bash bc bf bsdgames bsh clisp clojure cmake 
  coffeescript dafny dc ecere-dev elixir emacs-nox erlang f2c fish flex 
  fp-compiler fsharp g++ gambas3-script gap gawk gcc gdb gdc 
  generator-scripting-language genius gforth gfortran ghc ghostscript 
  gnat gnu-smalltalk gnucobol gnuplot gobjc  groovy guile-2.0 gzip 
  haxe icont iconx intercal iverilog jasmin-sable jq julia ksh lisaac 
  livescript llvm lua5.3 m4 make maxima minizinc mlton mono-devel 
  mono-mcs mono-vbnc nasm neko nickle nim node-typescript nodejs ocaml 
  octave openjdk-11-jdk pakcs pari-gp parser3-cgi perl php-cli pike8.0 
  python3 r-base rakudo ratfor rc regina-rexx ruby ruby-mustache rustc 
  scala scilab-cli sed slsh spin squirrel3 swi-prolog tcl tcsh valac vim 
  xsltproc yabasic yorick zoem zsh

Then, build the bundled interpreters.

$ sudo apt-get install cmake libpng-dev libgd-dev groff bison curl
$ make -C vendor

2. Run each program on each interpreter/compiler.

$ ulimit -s unlimited
$ ruby QR.rb > QR.rs
$ rustc QR.rs && ./QR > QR.scala
$ scalac QR.scala && scala QR > QR.scm
$ guile QR.scm > QR.sci
$ scilab-cli -nb -f QR.sci > QR.sed
$ sed -E -f QR.sed QR.sed > QR.spl
$ ./vendor/local/bin/spl2c < QR.spl > QR.spl.c && gcc -o QR -I ./vendor/local/include -L ./vendor/local/lib QR.spl.c -lspl -lm &&
  ./QR > QR.sl
$ slsh QR.sl > QR.st
$ gst QR.st > QR.nut
$ squirrel QR.nut > QR.sml
$ mlton @MLton fixed-heap 200M -- QR.sml && ./QR > QR.sq
$ ruby vendor/subleq.rb QR.sq > QR.tcl
$ tclsh QR.tcl > QR.tcsh
$ tcsh QR.tcsh > QR.t
$ ruby vendor/thue.rb QR.t > QR.ts
$ tsc --outFile QR.ts.js QR.ts && nodejs QR.ts.js > QR.unl
$ ruby vendor/unlambda.rb QR.unl > QR.vala
$ valac QR.vala && ./QR > QR.mid
$ mono vendor/local/bin/Vlt.exe /s QR.mid && mono QR.exe > QR.v
$ iverilog -o QR QR.v && ./QR -vcd-none > QR.vim
$ vim -EsS QR.vim > QR.vb
$ vbnc QR.vb && mono ./QR.exe > QR.ws
$ ruby vendor/whitespace.rb QR.ws > QR.xslt
$ xsltproc QR.xslt > QR.yab
$ yabasic QR.yab > QR.yorick
$ yorick -batch QR.yorick > QR.azm
$ zoem -i QR.azm > QR.zsh
$ zsh QR.zsh > QR.+
$ a+ QR.+ > qr.adb
$ gnatmake qr.adb && ./qr > QR.als
$ LANG=C LD_LIBRARY_PATH=/usr/lib/afnix axi QR.als > QR.aheui
$ ruby vendor/aheui.rb QR.aheui > QR.a68
$ a68g QR.a68 > QR.ante
$ ruby vendor/ante.rb QR.ante > QR.cc
$ ag++ -std=c++11 -o QR QR.cc && ./QR > QR.aj
$ ajc QR.aj && java QR > QR.asy
$ asy QR.asy > QR.dats
$ patscc -o QR QR.dats && ./QR > QR.awk
$ awk -f QR.awk > QR.bash
$ bash QR.bash > QR.bc
$ BC_LINE_LENGTH=4000000 bc -q QR.bc > QR.bsh
$ bsh QR.bsh > QR.bef
$ cfunge QR.bef > QR.Blc
$ ruby vendor/blc.rb < QR.Blc > QR.bf
$ bf -c500000 QR.bf > QR.c
$ gcc -o QR QR.c && ./QR > QR.cpp
$ g++ -o QR QR.cpp && ./QR > QR.cs
$ mcs QR.cs && mono QR.exe > QR.chef
$ PERL5LIB=vendor/local/lib/perl5 compilechef QR.chef QR.chef.pl &&
  perl QR.chef.pl > QR.clj
$ clojure QR.clj > QR.cmake
$ cmake -P QR.cmake > QR.cob
$ cobc -O2 -x QR.cob && ./QR > QR.coffee
$ coffee --nodejs --stack_size=100000 QR.coffee > QR.lisp
$ clisp QR.lisp > QR.curry
$ pakcs --nocypm :load QR.curry :save :quit && ./QR > QR.d
$ gdc -o QR QR.d && ./QR > QR.dfy
$ dafny QR.dfy && mono QR.exe > QR.dc
$ dc QR.dc > QR.ec || true
$ ecp -c QR.ec -o QR.sym && ecc -c QR.ec -o QR.c && ecs -console QR.sym QR.imp -o QR.main.ec &&
  ecp -c QR.main.ec -o QR.main.sym && ecc -c QR.main.ec -o QR.main.c &&
  gcc -o QR QR.c QR.main.c -lecereCOM && ./QR > QR.exs
$ elixir QR.exs > QR.el
$ emacs -Q --script QR.el > QR.erl
$ escript QR.erl > QR.fsx
$ fsharpc QR.fsx -o QR.exe && mono QR.exe > QR.false
$ ruby vendor/false.rb QR.false > QR.fl
$ flex -o QR.fl.c QR.fl && gcc -o QR QR.fl.c && ./QR > QR.fish
$ fish QR.fish > QR.fs
$ gforth QR.fs > QR.f
$ gfortran -o QR QR.f && ./QR > QR.f90
$ gfortran -o QR QR.f90 && ./QR > QR.gbs
$ gbs3 QR.gbs > QR.g
$ gap -q QR.g > QR.gdb
$ gdb -q -x QR.gdb > QR.gel
$ genius QR.gel > QR.gsl
$ gsl -q QR.gsl > QR.plt
$ gnuplot QR.plt > QR.
$ go run QR.go > QR.gs
$ ruby vendor/golfscript.rb QR.gs > QR.grass
$ ruby vendor/grass.rb QR.grass > QR.groovy
$ groovy QR.groovy > QR.gz
$ gzip -cd QR.gz > QR.hs
$ ghc QR.hs && ./QR > QR.hx
$ haxe -main QR -neko QR.n && neko QR.n > QR.icn
$ icont -s QR.icn && ./QR > QR.i
$ ick -bfOc QR.i && gcc -static QR.c -I /usr/include/ick-* -o QR -lick &&
  ./QR > QR.j
$ jasmin QR.j && java QR > QR.java
$ javac QR.java && java QR > QR.js
$ nodejs QR.js > QR.jq
$ jq -r -n -f QR.jq > QR.jsfuck
$ nodejs --stack_size=100000 QR.jsfuck > QR.jl
$ julia QR.jl > QR.ksh
$ ksh QR.ksh > QR.lazy
$ lazyk QR.lazy > qr.li
$ lisaac qr.li && ./qr > QR.ls
$ lsc QR.ls > QR.ll
$ llvm-as QR.ll && lli QR.bc > QR.lol
$ lci QR.lol > QR.lua
$ lua5.3 QR.lua > QR.m4
$ m4 QR.m4 > QR.mk
$ make -f QR.mk > QR.mac
$ maxima -q --init-mac=QR.mac > QR.mzn
$ minizinc --solver Gecode --soln-sep '' QR.mzn > QR.il
$ ilasm QR.il && mono QR.exe > QR.mustache
$ mustache QR.mustache QR.mustache > QR.asm
$ nasm -felf QR.asm && ld -m elf_i386 -o QR QR.o && ./QR > QR.neko
$ nekoc QR.neko && neko QR.n > QR.5c
$ nickle QR.5c > QR.nim
$ nim c QR.nim && ./QR > QR.m
$ gcc -o QR QR.m && ./QR > QR.ml
$ ocaml QR.ml > QR.octave
$ mv QR.m QR.m.bak && octave -qf QR.octave > QR.ook && mv QR.m.bak QR.m
$ ruby vendor/ook-to-bf.rb QR.ook QR.ook.bf && bf -c500000 QR.ook.bf > QR.gp
$ gp -f -q QR.gp > QR.p
$ parser3 QR.p > QR.pas
$ fpc QR.pas && ./QR > QR.pl
$ perl QR.pl > QR.pl6
$ perl6 QR.pl6 > QR.php
$ php QR.php > QR.png
$ npiet QR.png > QR.pike
$ pike QR.pike > QR.ps
$ gs -dNODISPLAY -q QR.ps > QR.ppt
$ ppt -d < QR.ppt > QR.prolog
$ swipl -q -t qr -f QR.prolog > QR.pr
$ spin -T QR.pr > QR.py
$ python3 QR.py > QR.R
$ R --slave -f QR.R > QR.ratfor
$ ratfor -o QR.ratfor.f QR.ratfor && gfortran -o QR QR.ratfor.f &&
  ./QR > QR.rc
$ rc QR.rc > QR.rexx
$ rexx ./QR.rexx > QR2.rb

You will see that QR.rb is the same as QR2.rb.

$ diff QR.rb QR2.rb

Alternatively, just type make.

$ make

Note: It may require huge memory to compile some files.

Docker

Simply build the image and run a container as follows:

$ docker build -t qr .
$ docker run --privileged --rm -e CI=true qr

Note: you need to run in privileged mode otherwise the maxima command will fail.

If you want to check generated files, you can mount the local directory in the Docker container (but keep using the vendor directory of the container), as follows:

$ docker run --privileged --rm -e CI=true -v $(pwd):/usr/local/share/quine-relay -v /usr/local/share/quine-relay/vendor qr

Other platforms

You may find instructions for other platforms in the wiki.

If you are not using these Linux distributions, please find your way yourself. If you could do it, please let me know. Good luck.

Tested interpreter/compiler versions

I used the following Ubuntu deb packages to test this program.

# language ubuntu package version
1 Ruby ruby 1:2.7+1
2 Rust rustc 1.41.0+dfsg1+llvm-0ubuntu2
3 Scala scala 2.11.12-4
4 Scheme guile-2.0 2.0.13+1-5.4
5 Scilab scilab-cli 6.1.0+dfsg1-1ubuntu3
6 sed sed 4.7-1
7 Shakespeare N/A
8 S-Lang slsh 2.3.2-4
9 Smalltalk gnu-smalltalk 3.2.5-1.3build3
10 Squirrel squirrel3 3.1-8build1
11 Standard ML mlton 20130715-3
12 Subleq N/A
13 Tcl tcl 8.6.9+1
14 tcsh tcsh 6.21.00-1
15 Thue N/A
16 TypeScript node-typescript 3.8.3-1
17 Unlambda N/A
18 Vala valac 0.48.3-1
19 Velato N/A
20 Verilog iverilog 10.3-1build1
21 Vimscript vim 2:8.1.2269-1ubuntu5
22 Visual Basic mono-vbnc 4.0.1-3
23 Whitespace N/A
24 XSLT xsltproc 1.1.34-4
25 Yabasic yabasic 1:2.86.6-1
26 Yorick yorick 2.2.04+dfsg1-10
27 Zoem zoem 11-166-1.2
28 zsh zsh 5.8-3ubuntu1
29 A+ aplus-fsf 4.22.1-10.1
30 Ada gnat 9ubuntu2
31 AFNIX afnix 2.9.2-2build1
32 Aheui N/A
33 ALGOL 68 algol68g 2.8.4-1
34 Ante N/A
35 AspectC++ aspectc++ 1:2.2+git20200229-1
36 AspectJ aspectj 1.9.2-1
37 Asymptote asymptote 2.62-1
38 ATS ats2-lang 0.3.13-1
39 Awk gawk 1:5.0.1+dfsg-1
40 bash bash 5.0-6ubuntu1
41 bc bc 1.07.1-2build1
42 BeanShell bsh 2.0b4-20
43 Befunge N/A
44 BLC8 N/A
45 Brainfuck bf 20041219ubuntu6
46 C gcc 4:9.3.0-1ubuntu2
47 C++ g++ 4:9.3.0-1ubuntu2
48 C# mono-mcs 6.8.0.105+dfsg-2
49 Chef N/A
50 Clojure clojure 1.10.1-1
51 CMake cmake 3.16.3-1ubuntu1
52 Cobol gnucobol 2.2-5
53 CoffeeScript coffeescript 1.12.8~dfsg-4build1
54 Common Lisp clisp 1:2.49.20180218+really2.49.92-3build3
55 Curry pakcs 2.2.0-1
56 D gdc 4:10.0-1ubuntu2
57 Dafny dafny 2.3.0+dfsg-0.1
58 dc dc 1.07.1-2build1
59 eC ecere-dev 0.44.15-1build3
60 Elixir elixir 1.9.1.dfsg-1.3
61 Emacs Lisp emacs-nox 1:26.3+1-1ubuntu2
62 Erlang erlang 1:22.2.7+dfsg-1
63 F# fsharp 4.0.0.4+dfsg2-2
64 FALSE N/A
65 Flex flex 2.6.4-6.2
66 Fish fish 3.1.0-1.2
67 Forth gforth 0.7.3+dfsg-9build2
68 FORTRAN77 f2c 20160102-1
69 Fortran90 gfortran 4:9.3.0-1ubuntu2
70 Gambas script gambas3-script 3.14.3-2ubuntu3.1
71 GAP gap 4r10p2-2
72 GDB gdb 9.1-0ubuntu1
73 GEL (Genius) genius 1.0.24-2build2
74 GeneratorScriptingLanguage generator-scripting-language 4.1.5-3
75 Gnuplot gnuplot 5.2.8+dfsg1-2
76 Go golang 2:1.13~1ubuntu2
77 GolfScript N/A
78 Grass N/A
79 Groovy groovy 2.4.17-4ubuntu1
80 Gzip gzip 1.10-0ubuntu4
81 Haskell ghc 8.8.1+dfsg1+is+8.6.5+dfsg1-3
82 Haxe haxe 1:4.0.5-1
83 Icon icont, iconx 9.4.3-7ubuntu1
84 INTERCAL intercal 30:0.30-3
85 Jasmin jasmin-sable 2.5.0-2
86 Java openjdk-11-jdk 11.0.7+10-3ubuntu1
87 JavaScript nodejs 10.19.0~dfsg-3ubuntu1
88 Jq jq 1.6-1
89 JSFuck nodejs 10.19.0~dfsg-3ubuntu1
90 Julia julia 1.4.1+dfsg-1
91 ksh ksh 2020.0.0-5
92 Lazy K N/A
93 Lisaac lisaac 1:0.39~rc1-3build1
94 LiveScript livescript 1.6.0+dfsg-1
95 LLVM asm llvm 1:10.0-50~exp1
96 LOLCODE N/A
97 Lua lua5.3 5.3.3-1.1ubuntu2
98 M4 m4 1.4.18-4
99 Makefile make 4.2.1-1.2
100 Maxima maxima 5.43.2-3
101 MiniZinc minizinc 2.4.2-1build1
102 MSIL mono-devel 6.8.0.105+dfsg-2
103 Mustache ruby-mustache 1.0.2-1
104 NASM nasm 2.14.02-1
105 Neko neko 2.3.0-1
106 Nickle nickle 2.85-1build1
107 Nim nim 1.0.6-1
108 Objective-C gobjc 4:9.3.0-1ubuntu2
109 OCaml ocaml 4.08.1-8
110 Octave octave 5.2.0-1
111 Ook! N/A
112 PARI/GP pari-gp 2.11.2-2
113 Parser 3 parser3-cgi 3.4.5-7
114 Pascal fp-compiler 3.0.4+dfsg-23
115 Perl 5 perl 5.30.0-9build1
116 Perl 6 rakudo 2019.11-4
117 PHP php-cli 2:7.4+75
118 Piet N/A
119 Pike pike8.0 8.0.702-1ubuntu1
120 PostScript ghostscript 9.50~dfsg-5ubuntu4
121 PPT (Punched tape) bsdgames 2.17-28build1
122 Prolog swi-prolog 7.6.4+dfsg-2ubuntu2
123 Promela (Spin) spin 6.4.9+dfsg-1
124 Python python3 3.8.2-0ubuntu2
125 R r-base 3.6.3-2
126 Ratfor ratfor 1.04-1
127 rc rc 1.7.4+97.gceb59bb-2
128 REXX regina-rexx 3.6-2.1

Note that some languages are not available in Ubuntu (marked as N/A). This repository includes their implementations in vendor/. See also vendor/README in detail.

Frequently asked questions

Q. Why?

A. Take your pick.

Q. How?

A. Good news: I published a book, “The world of obfuscated, esoteric, artistic programming”. It explains how to write a quine, an ascii-art quine, and a uroboros quine like this quine-relay. You can buy my book on amazon.co.jp.

(It also contains my almost all (about forty) works, including alphabet-only Ruby program, radiation-hardened quine, etc., and explains many techniques to write such programs.)

Bad news: It is written in Japanese. I hope you could translate it to English and help me earn royalties.

Q. Language XXX is missing!

A. See the criteria for language inclusion in detail. (In short: please create a deb package and contribute it to Ubuntu.)

See also ❤️.

Q. Does it really work?

A. Build Status

Q. How long did it take you?

A. Do you try to cross the world line?

Q. The code does not fit into my display!

A. Here you go.

Q. How was the code generated?

A.

$ sudo apt-get install rake ruby-cairo ruby-rsvg2 ruby-gdk-pixbuf2 
  optipng advancecomp ruby-chunky-png
$ cd src
$ rake2.0 clobber
$ rake2.0

License

The MIT License applies to all resources except the files in the vendor/ directory.

The files in the vendor/ directory are from third-parties and are distributed under different licenses. See vendor/README in detail.


The MIT License (MIT)

Copyright (c) 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Yusuke Endoh (@mametter), @hirekoke

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.