How to replace all 2-space groups with a tab character in Sublime Text?

Question

I want to convert a file which was indented using 2 spaces into one which uses tabs. How do i specify this regular expression replacing?

I can find the regular expression with this: /^( )+/ But how do i now replace each 2-space groups with a tab?

Thanks in advance.

Answer 1

SublimeText3 uses PCRE regex engine, thus you may use the following regex replacement:

Find: (^|\G) (or a bit more visible (^|\G)[ ]{2})
Replace: \t

The (^|\G) matches the start of a line (^) or document or the end of the previous successful match (\G), and the (= [ ]{2}) will match 2 regular spaces.