Why would reverse hunk button be unselectable?

Question

Why would the reverse hunk button be unselectable? As I click on various commits within the commit graph, sometimes it is available but most of the time it is grayed out and unselectable.  I cannot understand why it is mostly unselectable.

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Seth · Answer

If you have not committed the deletion, you should be able to right click the file in the list, and choose "Discard", which means "get rid of any uncommitted changes".

If you have committed the deletion, it looks like you may need to reverse the entire commit, then amend the reverse commit to restore any changes you want to keep.

Either way, you'll have to use parts of the UI outside the diff view.

Shawn Fox · Answer

Okay.  That makes some sense.  However, I am in a situation where I'd like to reverse the deletion of a file.  Therefore changing the hunk size will not do any good since the entire file is the hunk.  The reverse file option is also grayed out.  My diff settings are set very high to 16K and the files in question are certainly not bigger than 16K.

It appears that the files in question are more than 100 lines.  The Max Diff Line Count is set to 2500.  My size limits for both text and binary are set to 16K.  Why would it still not allow me to reverse a file?

Seth · Answer

Sometimes a hunk is too large to be displayed in its entirety. When this happens, SourceTree doesn't let you reverse the entire hunk because you can't preview everything you're reversing. You can try reducing the lines of context to break your large hunk into smaller hunks.

You can also adjust the settings in the Diff tab of the Options menu (see the "Internal Diff View" section).