In a git diff, can I show only deletions that aren't followed by an addition?

Question

I'd like to be able to show deletions in git diff that aren't followed by an addition. That is, only show - lines that aren't followed by + lines. Is that possible?

Answer 1

git diff | awk '/^@/{ if(s) print p; s = 1; p="" } 
    s == 1 && /^\+/ { s = 0 } 1 {p = sprintf("%s\n%s", p, $0)} 
    END { if (s) print p }' s=2

Answer 2

git diff --numstat | awk '/^0/ {print $3}'

From the git-diff manpage:

The --numstat option gives the diffstat(1) information but is designed for easier machine consumption. An entry in --numstat output looks like this:

1       2       README
3       1       arch/{i386 => x86}/Makefile

That is, from left to right:

1. the number of added lines;

2. a tab;

3. the number of deleted lines;

4. a tab;

5. pathname (possibly with rename/copy information);

6. a newline.