Bash script for quickly debugging CoffeeScript line numbers

dcoffee

#!/bin/bash
[ -z $3 ] && AROUND=2 || AROUND=$3
coffee -cp $1 | nl -b a | perl -pe "\$_ = \"\033[1;29m\$_\033[0m\" if (\$. == $2)" | head -n $(($2+$AROUND)) | tail -n $(($AROUND * 2 + 1))

# Usage: dcoffee path/to/file.coffee <LINE NUMBER> [NUMBER OF LINES BEFORE/AFTER]

# A tiny bash script for finding a line in the compiled JavaScript with some context around it,
# useful to quickly check where errors in compiled JavaScript are coming from.
# https://github.com/jashkenas/coffee-script/issues/558 FTW

# Example:

# $ dcoffee util/index.coffee 7
#      5	  isArray = require('underscore').isArray;
#      6	
#      7	  exports.uncurryThis = uncurryThis = Function.prototype.bind.bind(Function.prototype.call);
#      8	
#      9	  exports.curryThis = curryThis = function(fn) {

# $ dcoffee util/index.coffee 7 1
#      6	
#      7	  exports.uncurryThis = uncurryThis = Function.prototype.bind.bind(Function.prototype.call);
#      8