For most projects I work on I use a before-save-hook to run whitespace-cleanup. This is fine when everybody on the team cleanups up their spaces but sometimes I am involved in already running projects were most files are littered with trailing white. Currently I simply turn off my save-hook and add my share of spaces but ideally I want my diffs to be squeaky clean..
Are there any packages out there which only cleanup whitespace on the lines I touched?
The ws-butler package removes whitespace only from the touched lines. The package is available on Melpa.
From that package's README on github:
Only lines touched get trimmed. If the white space at end of buffer is changed, then blank lines at the end of buffer are truncated respecting require-final-newline.
Trimming only happens when saving.
I recently came across `whitespace-cleanup-mode, which, according to its Github page is
a minor mode which calls
whitespace-cleanupbefore saving the current buffer, but only if the whitespace in the buffer was initially clean.
It may not do exactly what you want, but it may help others with a similar problem.
