extract-js-examples.sh

#!/bin/bash

# Given an input documentation file, output all JavaScript code snippets
# contained therein.

INPUT_DOC="$1"

OPENING_LINES=$( sed -n '/^```js$/=' "$INPUT_DOC" )

for LINE in $OPENING_LINES; do
	SNIPPET_LENGTH=$( sed -e "1,${LINE}d" "$INPUT_DOC" | sed -n '/^```$/=' | head -1 )
	CLOSING_LINE=$( expr $LINE + $SNIPPET_LENGTH )

	# Exclude the opening and closing tags from the range
	RANGE_STRING="$( expr $LINE + 1)-$( expr $CLOSING_LINE - 1 )"

	echo -e "//////////////"
	echo "// BEGIN SNIPPET: $RANGE_STRING"
	sed -n "$LINE,/^\`\`\`$/p" "$INPUT_DOC" | sed -e '1d' -e '$d'
	echo "// END SNIPPET: $RANGE_STRING"
	echo -e "//////////////\n"
done