format html with sed

Question

How can I insert newlines in an html file before each table related tag using sed?

Answer 1

This should be a basic solution

sed -s "s/<\(\/\?\)\(t\)/\n<\1\2/gi"

Not 100% perfect as it will ignore col, colgroup and catch the telytype tag but chances are you arn't using either those.

Answer 2

sed -e "s/<\\(table\\|td\\|tr\\)/\\
<\\1/gi"

Add other element names you are interested in. Not 100% perfect either: it does not cater for all of HTML weirdness, but then sed will never be enough.

Answer 3

matches opening & closing tags:

sed "s/\(<\/\?\(table\|tr\|td\)\)/\n&/gi"

opening tags only:

sed "s/\(<\(table\|tr\|td\)\)/\n&/gi"

closing tags only:

sed "s/\(<\/\(table\|tr\|td\)\)/\n&/gi"