regex - regular expression to match everything until the last occurrence of /

Question

Using a regular expression (replaceregexp in Ant) how can I match (and then replace) everything from the start of a line, up to and including the last occurrence of a slash?

What I need is to start with any of these:

../../replace_this/keep_this

../replace_this/replace_this/Keep_this

/../../replace_this/replace_this/Keep_this

and turn them into this:

what_I_addedKeep_this

It seems like it should be simple but I'm not getting it. I've made regular expressions that will identify the last slash and match from there to the end of the line, but what I need is one that will match everything from the start of a line until the last slash, so I can replace it all.

This is for an Ant build file that's reading a bunch of .txt files and transforming any links it finds in them. I just want to use replaceregexp, not variables or properties. If possible.

Answer 1

You can match this:

.*/

and replace with your text.

DEMO