escape : in front matter automatically

Author: jjallaire

_posts/2012-12-14-transforming-a-matrix.md

@@ -4,7 +4,7 @@ author: Romain Francois
 license: GPL (>= 2)
 tags: matrix stl featured
 summary: Demonstrates transforming a matrix passed to a function 
-  using std::transform.
+  using std::transform.
 layout: post
 src: 2012-12-14-transforming-a-matrix.cpp
 ---

_scripts/knit.sh

@@ -37,6 +37,10 @@ readInputFile <- function(inputFile) {
   if (delimiters[2] - delimiters[1] <= 1)	
      stop("Empty front-matter section in post")	
   frontMatter <- input[(delimiters[1]+1):(delimiters[2]-1)]
+  
+  # escape : globally then restore the initial :
+  frontMatter <- gsub(":", "&#58;", frontMatter, fixed = TRUE)
+  frontMatter <- sub("&#58;", ":", frontMatter, fixed = TRUE)
 
   # validate and ammend front matter as necessary
   hasField <- function(field) {