Use search and replace in multiple files to convert n
spaces to tabs in select files.
First open find in files panel, cmd + shift + f, by default to find and replace in multiple files. Next define a regular expression to match spaces as tabs eg {4}
(make sure you set Regular Expressions in the panel) for 4 spaces and replace with \t
in desired files. Change {4}
to however many spaces are being used for indentation.
As mentioned in comments to match spaces at the start of a line you can use the regexp ^( {4})+