Until now the hook only checked newly added symlinks. This patch is a
first draft of also checking the worktree and index for any dangling
symlinks after staging a deletion.
The whole thing probably breaks when file-names contain newlines and
maybe also a mix of quotes. I plan on making this more robust in the
future but see no urgency for it since this repository has pretty simple
filenames.
The `die` in the pipe does not exit the whole script but only the pipe.
This currently works because the pipe is the last thing being executed.
If something would come after the pipe, the hook would happily continue
executing. Properly propagate the exit to prevent this in the future.
The function `die` was redundantly implemented in various files.
Move the function into .local/bin/helpers.sh and source that where
previously implemented.
Also prepend the program's name to the message and always terminate the
message with a newline. The newline was previously needed for a small
but unnecessary hack that prevented the need of the `[ -z "$1" ]` test.
Refactor the script to match my coding style more and update the
comments.
When checking the filenames for non-ASCII characters, check also
renaming of files instead of only additions.
