Plumbing and filtering for git diff same file between 2 branches-CodePudding

I'm trying to run git diff to obtain only the deleted lines in the same file object.json comparing my feature branch to dev branch.

For example:

feature branch object.json
{
  "foo1": "bar1"
}


dev branch object.json
{
  "foo1": "bar1",
  "foo2": "bar2"
}

Desired output (or similar):

- "foo2": "bar2"

I've tried running the following:

git diff --diff-filter=D feature dev -- object.json

But the diff-filter flag does not seem to work. Furthermore, it only gives a porcelain output which requires processing to be piped.

Is there a way I can achieve both filtering and converting this to plumbing with just git built-in options ? Any help is much appreciated!

CodePudding user response：

git diff feature:path/to/object.json dev:path/to/object.json \
| sed -n '/^@@/,/^diff/ { /^-/p }'

Git doesn't re-implement the entire Unix text-processing toolbox because doing that would just make more work for everyone, for nothing.