git-diff-index
Compare the working directory with a commit or tree object. tldr-pages
On several platforms
Several platforms
Compare the working directory with a specific commit
git diff-index commitIdentifyCompare a specific file or directory in working directory with a commit
git diff-index commit path/to/file_or_directoryIdentifyCompare the working directory with the index (staging area) to check for staged changes
git diff-index --cached commitIdentifySuppress output and return an exit status to check for differences
git diff-index --quiet commitIdentify