Added ruby example.

Author: Henrik Holst

README.md

@@ -1,16 +1,17 @@
-pandoc octave filter
-====================
+pandoc codeblock filters
+========================
 
-This is an example of [Pandoc] filters and [loginteractive].
+This is an example of [Pandoc] filters and [loginteractive] for logging
+interactive programs as if they where executed from a terminal.
 
-Octave
+## Octave
 
 ~~~ { .octave .interactive }
-A = rand(4,4)
+A = reshape(1:4,[2 2])
 v = eig(A)
 ~~~
 
-Python
+## Python
 
 ~~~ { .python .interactive }
 def isPrime(n):
@@ -25,6 +26,15 @@ for n in range(2,100):
     if isPrime(n):
         print n,
 ~~~
+## Ruby
+
+~~~ { .ruby .interactive }
+def factorial(n)
+return 1 if n <= 1
+return n * factorial(n - 1)
+end
+factorial(20)
+~~~
 
 [Pandoc]: http://johnmacfarlane.net/pandoc/
 [loginteractive]: https://github.com/hholst80/loginteractive

README.pdf

@@ -20,13 +20,20 @@ def codeblock_interactive(key, value, format, meta):
     elif 'python' in options and 'interactive' in options:
         prg = 'python'
         cmd = 'env LD_PRELOAD=./loginteractive.so STDIN=stdin.txt STDOUT=stdout.txt python -i > /dev/null'
+    elif 'ruby' in options and 'interactive' in options:
+        prg = 'ruby'
+        cmd = 'env LD_PRELOAD=./loginteractive.so STDIN=stdin.txt STDOUT=stdout.txt irb --simple-prompt > /dev/null'
     if prg and cmd:
         f = file('stdin.txt','w')
         f.write(text)
         f.close()
         subprocess.call(cmd, shell=True, bufsize=1)
         f = open('stdout.txt','r')
-        text = "\n".join(f.read().split("\n")[0:-1])
+        text = f.read().split("\n")
+        if len(text[-1]) == 0:
+            text = "\n".join(text[0:-2])
+        else: # no ending line feed.
+            text = "\n".join(text[0:-1])
         f.close()
         return CodeBlock(("",[prg, "interactive"],[]),text)
 

pandoc_codeblock_interactive.py

@@ -1,2 +1,3 @@
 #!/bin/sh
-pandoc -t json < README.md | ./pandoc_codeblock_interactive.py | pandoc -f json -o README.pdf
+#pandoc -t json < README.md | ./pandoc_codeblock_interactive.py | pandoc -N --variable mainfont=Georgia --variable sansfont=Arial --variable monofont="Bitstream Vera Sans Mono Bold" --variable fontsize=12pt --variable version=1.10 -f json --latex-engine=xelatex --toc -o README.pdf
+pandoc -t json < README.md | ./pandoc_codeblock_interactive.py | pandoc -N --variable mainfont=Georgia --variable sansfont=Arial --variable monofont="Inconsolata" --variable fontsize=12pt --variable version=1.10 -f json --latex-engine=xelatex --toc -o README.pdf