The default behavior of SourceTree (at least macOS) is diff only one file in external diff. How could I diff the whole repo between two commits?
I searched in this forum but didn't get a answer.
If you select multiple files and use the "External Diff" menu item or keyboard shortcut then diffs will be opened for each file. There is not a way to do a folder <-> folder comparison (root level, all files) between two commits currently. Please file or vote on an appropriate ticket in our public tracker for review in future planning.
Principal Developer, Sourcetree
Thanks for your reply. "External Diff" for multiple files using sourcetree is far from perfect. Just as what you said, all files are opened separately in the external diff.
I just give up. Because somebody opened a ticket more than 4 years ago already, it seems this feature is not what the sourcetree team really care about.